General Description
The MAX2700/MAX2701 are highly integrated direct
downconversion (zero-IF) receivers designed for wide-
band wireless local loop (WLL) systems operating in
the 1.8GHz to 2.5GHz band. The MAX2700/MAX2701s’
zero-IF architecture eliminates the need for IF down-
conversion stages and the use of an IF SAW filter. This
reduces the overall receiver cost by reducing the com-
ponent count and required board space.
The MAX2700/MAX2701 have three main blocks: low-
noise amplifier (LNA), quadrature downconverter, and
baseband variable gain amplifiers (VGAs). The LNA is
a single-ended amplifier with selectable gain and shut-
down options. It provides a high input third-order inter-
cept point (IP3), which reduces cross-modulation and
gain compression due to high-level RF interference.
The quadrature downconverter section consists of two
highly linear double-balanced mixers driven by an
external local oscillator (LO) with a selectable LO dou-
bler. The double-balanced mixers are optimized to pro-
vide high input IP3 and minimum added noise. The
mixers’ high input second-order intercept point (IIP2)
helps minimize receiver desensitization due to high-
level AM-modulated interferers.
The two baseband VGAs in each channel provide 80dB
of total maximum gain and greater than 60dB of gain
control. The first AGC amplifier is optimized for low
noise, low power dissipation, and high linearity over the
entire gain range to ensure high gain compression per-
formance. An external lowpass filter between baseband
VGAs provides the required channel selectivity at the
adjacent channel. An integrated gain offset correction
loop circuit provides <0.3dB amplitude mismatch
between the I and Q channels.
The MAX2700/MAX2701 operate from a single +2.7V to
+3.3V power supply, drawing only 165mA of supply
current and 20µA in shutdown mode. Both devices are
available in small 48-pin TQFP packages with exposed
paddle (EP) for optimum high-frequency performance.
________________________Applications
Wireless Local Loop
Wideband Direct-Sequence Spread-Spectrum
Systems
Two-Way MMDS
Wideband 2.4GHz ISM Radios
Digital Microwave Radios
Features
♦Input Frequency Range
1.8GHz to 2.1GHz (MAX2700)
2.1GHz to 2.5GHz (MAX2701)
♦Cascaded Performance at 1960 MHz
3.5dB Noise Figure
-7.5dBm Input IP3 at Maximum Gain
♦LNA with Selectable Gain and Shutdown Option
♦High Linearity Direct I/Q Downconverter
♦Wideband LO Quadrature Generator
♦3dB Baseband Channel Bandwidth of At Least
56MHz
♦Variable Gain Baseband Amplifiers with >60dB
Control Range
♦Baseband Gain Offset Correction Loop
♦+2.7V to +3.3V Single-Supply Operation
♦Small 48-pin TQFP-EP Package
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
________________________________________________________________ Maxim Integrated Products 1
IIN2-
DCI2+
DCI2-
IOUT2
GND
RFIN-
RFIN+
VCC
QOUT2
DCQ2-
DCQ2+
QIN2-
CEXT-
CEXT+
VCC
X2_EN
GND
LNAIN
GND
GND
GAIN_SET
SHDN
AGC
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
GND
LNAOUT
GND
MIX_Q
VCC
QIN1+
QIN1-
DCQ1+
DCQ1-
QOUT1
MIXTNK
QIN2+
VCC
LO
GND
MIX_I
GND
IIN1+
IIN1-
DCI1+
DCI1-
IOUT1
VCC
IIN2+
TQFP-EP
MAX2700
MAX2701
TOP VIEW
Pin Configuration
19-1667; Rev 0; 4/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX2700ECM -40°C to 85°C 48 TQFP-EP
MAX2701ECM -40°C to 85°C 48 TQFP-EP
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +2.7V to +3.3V, SHDN = GAIN_SET = VCC, X2_EN = GND, VAGC = 1.25V, CEXT+ con-
nected to CEXT-; no RF input signals applied; RFIN, LNAIN, LO inputs are terminated with 50Ω, LNAOUT connected to VCC through a
10nH inductor; MIX_I, MIX_Q, QIN1+, QIN1-, QOUT1, IIN1+, IIN1-, IOUT1, QIN2+, QIN2-, QOUT2, IIN2+, IIN2-, IOUT2 pins are
unconnected; TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.0V, TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCC to GND..............................................................-0.3V to +6V
RF Signals
PRFIN, PLNAIN, PLO.....................................................+15dBm
Baseband Signals
IIN1+ to IIN1-, IIN2+ to IIN2-,
QIN1+ to QIN1-, QIN2+ to QIN2-......................................±2V
Input Voltages
AGC, GAIN_SET, SHDN, X2_EN,
CEXT_, RFIN_, LO, LNAIN, IIN_ _,
QIN_ _ , DCI_ _ , DCQ_ _ to GND..........-0.3V to (VCC + 0.3V)
Input Current
AGC……………………………………………………..±50mA
All Digital Inputs………………………………………..±10mA
Continuous Power Dissipation (TA= +70°C)
48-Pin TQFP-EP (derate 27mW/°C above +70°C).....2000mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERS CONDITIONS
MIN
TYP
MAX
SUPPLY
Supply Voltage 2.7 3.3 V
MAX2700
165 215
LNA
enabled MAX2701
167 220
MAX2700
155 200
TA = +25°CLNA
disabled MAX2701
156 205
MAX2700
230
LNA
enabled MAX2701
235
MAX2700
210
Operating Supply Current
TA = -40°C to +85°CLNA
disabled MAX2701
215
mA
Shutdown Supply Current SHDN = GND, VAGC = 0.5V 20
100
µA
CONTROL INPUTS/OUTPUTS
Input Logic Voltage High 2V
Input Logic Voltage Low 0.6 V
SHDN, X2_EN, GAIN_SET -1 0.5
AGC, +0.5 < VAGC < +2.0V -22 12
Input Bias Current AGC, VAGC = 0.5V, SHDN = GND -2 2 µA
MIX_I, MIX_Q 1.2
IOUT1, QOUT1 1.1
DC Output Voltage IOUT2, QOUT2
1.25
V
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
PARAMETERS CONDITIONS
MIN
TYP
MAX
UNITS
LNA STAGE MAX2700
1800 2100
Operating Frequency Range
(Note 1) MAX2701
2100 2500
MHz
GAIN_SET = VCC
13.5 17.1 19.5
MAX2700,
fLNAIN = 1960MHz GAIN_SET = GND
-7.5 -1.9
2
GAIN_SET = VCC 13 20
TA = -40°C to 85°CGAIN_SET = GND -8 2.5
GAIN_SET = VCC 13
16.5 18.5
MAX2701,
fLNAIN = 2400MHz GAIN_SET = GND -6
-1.8
0.5
GAIN_SET = VCC
12.5
19
Power Gain (Note 2)
TA = -40°C to 85°CGAIN_SET = GND
-6.5
1.0
dB
GAIN_SET = VCC 2.0
MAX2700,
fLNAIN = 1960MHz GAIN_SET = GND
15.8
GAIN_SET = VCC 2.3
Noise Figure MAX2701,
fLNAIN = 2400MHz GAIN_SET = GND
16.7
dB
GAIN_SET = VCC
+2.7
MAX2700,
fLNAIN = 1960MHz GAIN_SET = GND
+5.1
GAIN_SET = VCC
+3.8
Input Third-Order Intercept
(Note 3) MAX2701,
fLNAIN = 2400MHz GAIN_SET = GND
+4.3
dBm
Reverse Isolation 1800MHz to 2500MHz, GAIN_SET = VCC or GND 28 dB
LNAIN to LO, fLNAIN = 1800MHz to 2500MHz 30
Isolation LNAOUT to RFIN, fLNAIN = 1800 MHz to 2500 MHz 44 dB
M AX2700 GAI N _S ET = V
C C
1.1
GAIN_SET = GND 1.8
M AX2701 GAI N _S ET = V
C C
1.3
At LNA input, with external
matching circuit at LNAIN
GAIN_SET = GND 2.1
M AX2700 GAI N _S ET = V
C C
1.7
GAIN_SET = GND 1.6
M AX2701 GAI N _S ET = V
C C
1.2
VSWR
At LNA output, with external
matching circuit at LNAOUT
GAIN_SET = GND 1.4
−
MIXER STAGE ( D i ffer enti al RF i np ut to m i xer I/ Q outp uts w i th ex te r nal b al u n and m atchi ng ci r cui t to 50Ω)
MAX2700
1800 2100
Frequency Range
(Notes 1, 2) MAX2701
2100 2500
MHz
MAX2700, fRFIN = 1960 MHz 16
19.3 21.5
Voltage Gain MAX2701, fRFIN = 2400 MHz
14.5 18.1
20 dB
MAX2700, fRFIN = 1960MHz
11.0
DSB Noise Figure MAX2701, fRFIN = 2400MHz
12.8
dB
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
4 _______________________________________________________________________________________
PARAMETERS CONDITIONS
MIN
TYP
MAX
UNITS
MAX2700, fLO = 980MHz
+6.3
Input Third-Order Intercept
(Note 4) MAX2701, fLO = 1200MHz
+6.5
dBm
MAX2700
+28.3
Input Second-Order Intercept
(Note 5) MAX2701 +38
dBm
MAX2700 1.5
VSWR W i th 50Ω exter nal
m atchi ng at RFIN + / RFIN - MAX2701 1.2 –
fRFIN = 1800MHz to
2100MHz 35
MAX2700 fRFIN ≤20MHz 28
fRFIN = 2100MHz to
2500MHz 22
Isolation (RFIN to MIX_I/Q)
MAX2701 fRFIN ≤20MHz 12
dB
MAX2700, fRFIN = 1800MHz to 2100MHz 38
Isolation (RFIN to LO) MAX2701, fRFIN = 2100MHz to 2500MHz 45 dB
fLO = 900MHz to
1050MHz, X2_EN = GND 49
fLO = 900MHz to
1050MHz, X2_EN = GND,
isolation at 2 x FLO 43
MAX2700
fLO = 1800MHz to
2100MHz, X2_EN = VCC 33
dB
fLO = 1050MHz to 1250MHz,
X2_EN = GND 60
fLO = 1050MHz to 1250MHz,
X2_EN = GND, isolation at
2 x FLO 44
Isolation (LO to RFIN)
MAX2701
fLO = 2100MHz to
2500MHz, X2_EN = VCC 70
Mixer Spurious Suppression 2 x LO - RF (Note 6) 60 dBc
-1dB bandwidth (Note 2) 37 69
Baseband Bandwidth MIX_I/Q -3dB bandwidth
170
MHz
Baseband frequency =
125kHz 0.1 0.7
Gain Mismatch ∆GV (I-Q) (between mixer
I and Q channels) Up to -1dB baseband
width (Note 2) 0 0.7 dB
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
_______________________________________________________________________________________ 5
PARAMETERS CONDITIONS
MIN
TYP
MAX
UNITS
Group Delay tgd, RFIN to MIX_I/Q, frequency up to
-1dB baseband width 1.8 ns
Differential Group Delay
(Note 2) ∆tgd (between mixer I and Q channels) 1 ns
Output Impedance Zout, MIX_I, MIX_Q, frequency up to -1dB baseband
width 1.4 Ω
Mixer Output Level
(Note 2) MIX_I, MIX_Q, baseband output at -1dB compression
point 1.4 2.1
Vp-p
LO DOUBLER, LO BUFFER, QUADRATURE GENERATOR MAX2700
900 1050
X2_EN = GND MAX2701
1050 1250
MAX2700
1800 2100
LO Frequency Range
(Notes 1, 2) X2_EN = VCC MAX2701
2100 2500
MHz
LO Input Power (Note 7) X2_EN = VCC or GND -16 -13 -10
dBm
fLO = 900MHz to
1050MHz, X2_EN = GND 2.0
MAX2700 fLO = 1800MHz to
2100MHz, X2_EN = VCC 1.8
fLO = 1050MHz to
1250MHz, X2_EN = GND 1.7
LO VSWR
MAX2701 fLO = 2100MHz to
2500MHz, X2_EN = VCC 2.0
−
Quadrature Error ∆φ , MIX_I to MIX_Q 1.5 4.5
degrees
BASEBAND STAGE 1 (IIN1 TO IOUT1, QIN1 TO QOUT1)
-1dB bandwidth (Note 2) 14 26
Channel Bandwidth -3dB bandwidth 56
MHz
Input Impedance IIN1+, IIN1-, QIN1+, QIN1-, single-ended 1.9 kΩ
Input Impedance Mismatch Between IIN1+ and QIN1+ 4 Ω
VAGC = 0.5V
-1.5
2.2 6
Voltage Gain (GV)VAGC = 2.0V 37 40 42 dB
Voltage Gain Mismatch Mismatch between IIN1 to IOUT1 and QIN1 to QOUT1,
0.5V < VAGC < 2 V 0.2 dB
VGA1 Gain Slope Guaranteed Monotonic over 0.5V <VAGC < 2V,
VAGC = 1.25V 34
dB/V
VAGC = 2.0V 7.5
Noise Figure ZS = 1.1kΩ (Note 8) VAGC = 0.5V 34 dB
Phase Shift (Note 2) For 10dB of gain (with AGC) 0.5 0.9
degrees
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
6 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
PARAMETERS CONDITIONS
MIN
TYP
MAX
UNITS
IIN1+ to IOUT1, up to -1dB frequency 1.6
Group Delay QIN1+ to QOUT1, up to -1dB frequency 1.6 ns
G r oup D el ay M i sm atch ( N ote 2) Between I and Q channel from 100kHz up to -1dB 0.3 1.3 ns
Output Impedance IOUT1, QOUT1, up to -1dB bandwidth 7 Ω
Output Impedance Mismatch Between IOUT1 and QOUT1, up to -1dB bandwidth 1 Ω
Output Voltage (Note 2) At -1dB compression point, IOUT1, QOUT1 0.7 1.1
Vp-p
BASEBAND STAGE 2 (IIN2+ TO IOUT2, QIN2+ TO QOUT2)
-1dB bandwidth (Note 2) 19 34
Channel Bandwidth -3dB bandwidth 63
MHz
Input Impedance IIN2+, IIN2-, QIN2+, QIN2-, single-ended 2.1 KΩ
Input Impedance Mismatch Between IIN2+ and QIN2+ 1.5 Ω
VAGC = 0.5V
-0.6
4.4 9.5
Voltage Gain (GV)VAGC = 2.0V 37 39 42 dB
Gain Correction Disabled 0.9
Voltage Gain Mismatch
(Note 2)
M i sm atch b etw een IIN 2 t o
IOU T2 and QIN 2 to
QOU T2, 0.5V < V
AGC
< 2V Gain Correction Enabled
(2dB initial mismatch) 0.3 dB
VGA2 Gain Slope Guaranteed monotonic over 0.5V < VAGC <2V,
VAGC =1.25V 30
dB/V
VAGC = 2.0V 14
Noise Figure ZS = 1.1kΩVAGC = 0.5V 47 dB
Phase shift (Note 2) For 10dB of gain 0.2 1.4
degrees
Group Delay IIN2+ to IOUT2, QIN 2+ to QOU T2, up to -1dB Frequency 1.7 ns
Group Delay Mismatch
(Note 2) Between I and Q channel from 100kHz up to -1dB
frequency 0.2 2.0 ns
Output Impedance IOUT2 , QOUT2, up to -1dB bandwidth 4.0 Ω
Output Impedance Mismatch Between IOUT2 and QOUT2, up to -1 dB bandwidth 4.0 Ω
Output Voltage (Note 2) At -1dB compression point, IOUT2 , QOUT2 1.2 1.9
Vp-p
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
_______________________________________________________________________________________ 7
Note 1: This is the recommended operating frequency range. The parts have been characterized over the specified frequency
range. Operation outside this range is possible but not guaranteed.
Note 2: Guaranteed by design and characterization.
Note 3: LNA is matched at input and output to 50Ω; f1= 1960MHz, f2= 1965MHz for MAX2700; f1= 2400MHz, f2= 2405MHz for
MAX2701; PIN = -30dBm per tone.
Note 4: Mixer IIP3 test. For MAX2700, RFIN is matched to 50Ωat 1960MHz. At RFIN, apply f1= 1964.2MHz, f2= 1968.2MHz, PIN =
-25dBm per tone, and measure IM3 product power level at 200kHz. For MAX2701, RFIN is matched to 50Ωat 2400MHz. At
RFIN, apply f1= 2404.2MHz, f2= 2408.2MHz, PIN = -25dBm per tone, and measure IM3 product power level at 200kHz.
Note 5: Mixer IIP2 test. For MAX2700, RFIN is matched to 50Ωat 1960MHz. At RFIN, apply f1= 1964.2MHz, f2= 1968.2MHz, PIN =
-25dBm per tone, and measure IM2 product power level at 4MHz. For MAX2701, RFIN is matched to 50Ωat 2400MHz. At
RFIN, apply f1= 2404.2MHz, f2= 2408.2MHz, PIN = -25dBm per tone, and measure IM2 product power level at 4MHz.
Note 6: Mixer spurious attenuation response. Mixer is matched to 50Ωat 1800MHz and FLO = 900MHz (LO doubler enabled).
FRFIN = 1801MHz, PRFIN = -85dBm, FSPUR = 3601.5MHz, PSPUR = -60dBm. Measure IF at 1MHz and spurious at 1.5MHz at
the output. For better than 38dBc spurious attenuation response, output spurious level should be at least 10dB lower than
the IF signal level. In the (2 x LO) - (1 x RF) spurious product notation, LO denotes the frequency of the final LO driving the
I/Q mixers inputs.
Note 7: Mixer gain specifications are production tested over LO power range.
Note 8: A filter output impedance of 1.1kΩcan directly drive the VGA inputs since there is minimal mismatch loss between source and
VGA input impedance.
Note 9: Electrolytic bypass cap to VCC not connected.
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
PARAMETERS CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY Mixer 57
VGA1 35
Power-Supply Ripple Rejection V
C C
= 3.0V + 1 00m VP P
fr eq uency = 100 to 300kH z,
V
OU T = 0.3Vp - p , ( N ote 9) VGA2 28 dBc
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
8 _______________________________________________________________________________________
Typical Operating Characteristics
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
180
170
160
150
140 2.5 2.92.7 3.1 3.3 3.5
ICC vs. VCC vs. TEMPERATURE
MAX2700-01
VCC (V)
ICC (mA)
TA = +25°C
TA = -45°C
TA = +85°C
10
12
16
14
18
20
1700 19001800 2000 2100
LNA GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2700-02
FREQUENCY (MHz)
GAIN (dB)
TA = -45°C
TA = +25°C
TA = +85°C
HIGH-GAIN MODE
-25
-30
-35
-401700 19001800 2000 2100
LNA REVERSE ISOLATION
vs. FREQUENCY vs. GAIN MODE
MAX2700-04
FREQUENCY (MHz)
S12 (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
1.4
1.8
1.6
2.2
2.0
2.6
2.4
1700 1800 18501750 1900 1950 2000
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2700-05
FREQUENCY (MHz)
NF (dB)
TA = +85°C
TA = +25°C
TA = -45°C
HIGH-GAIN MODE
-10
-8
-6
-4
-2
0
2
4
1700 1800 1900 2000 2100
LNA GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2700-03
FREQUENCY (MHz)
GAIN (dB)
TA = -45°CTA = +25°C
TA = +85°C
LOW-GAIN MODE
MAX2700
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
_______________________________________________________________________________________ 9
10
12
14
16
18
20
22
24
1.7 1.8 1.9 2.0 2.1
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2700-09
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
TA = -45°C
TA = +85°C
TA = +25°C
DOUBLER ENABLED
13
14
16
15
17
18
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2700-06
FREQUENCY (MHz)
NF (dB)
1700 19001800 2000
TA = +85°C
TA = +25°C
TA = -45°C
LOW-GAIN MODE
10
12
14
16
18
20
22
24
1.7 1.8 1.9 2.0 2.1
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2700-10
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
TA = -45°C
TA = +85°C
TA = +25°C
DOUBLER DISABLED
10
12
14
16
18
20
22
24
1.7 1.8 1.9 2.0 2.1
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. LO POWER
MAX2700-11
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
LO = -16dBm TO -10dBm
DOUBLER DISABLED
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
0
2
1
4
3
5
6
-45 15 35-25 -5 55 75
LNA IIP3 vs. TEMPERATURE
MAX2700-07
TEMPERATURE (°C)
IIP3 (dBm)
HIGH-GAIN MODE
LOW-GAIN MODE
0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
2.50 2.75 3.00 3.25 3.50
LNA IIP3 vs. VCC
MAX2700-08
VCC (V)
IIP3 (dBm)
0.5
HIGH-GAIN MODE
LOW-GAIN MODE
MAX2700
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
10 ______________________________________________________________________________________
2.00
1.75
1.50
1.25
1.00 1.7 1.91.8 2.0 2.1
φ ERROR vs. LO FREQUENCY
MAX2700-15
FREQUENCY (GHz)
φ ERROR (DEGREES)
DOUBLER ENABLED
DOUBLER DISABLED
-40
-45
-50
-55
-600.85 0.950.90 1.00 1.05
LO-RFIN ISOLATION vs. LO FREQUENCY
(INCLUDING BALUN)
MAX2700-16
FREQUENCY (GHz)
LO-RFIN ISOLATION (dB)
DOUBLER DISABLED
DOUBLER ENABLED
5
15
10
25
20
30
35
2.60 3.102.85 3.35
MIXER IIP2 vs. VCC vs. TEMPERATURE
MAX2700-14
VCC (V)
IIP2 (dBm)
TA = -45°C
TA = +85°CTA = +25°C
DOUBLER ENABLED
0
1
2
3
4
5
6
7
8
2.60 2.85 3.10 3.35
MIXER IIP3 vs. VCC vs. TEMPERATURE
MAX2700-13
VCC (V)
IIP3 (dBm)
TA = -45°C
TA = +85°CTA = +25°C
DOUBLER ENABLED
-40
-50
-60
-70
-800.85 0.950.90 1.00 1.05
LO-LNAIN ISOLATION vs. LO FREQUENCY
MAX2700-17
FREQUENCY (GHz)
LO-LNAIN ISOLATION (dB)
DOUBLER DISABLED
DOUBLER ENABLED
7
8
9
10
11
12
13
14
15
1800 19001850 1950 2000 2050 2100
DSB MIXER NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2700-12
FREQUENCY (MHz)
NF (dB)
TA = +85°C
TA = -45°C
TA = +25°C
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2700
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 11
0
20
40
60
80
100
120
140
160
0.50 1.000.75 1.25 1.50 1.75 2.00
MIXER BASEBAND BANDWIDTH vs. RL
MAX2700-18
RL (kΩ)
BANDWIDTH (MHz)
3dB BANDWIDTH
1dB BANDWIDTH
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.5 2.7 2.9 3.1 3.3 3.5
MIXER'S OUTPUT 1dB COMPRESSION
POINT vs. VCC vs. RL
MAX2700-19
VCC (V)
MIXER OUTPUT (Vp-p)
RL = 0.56kΩ
RL = 1.05kΩ, 2.00kΩ
190
180
170
160
150 2.5 2.92.7 3.1 3.3 3.5
ICC vs. VCC vs. TEMPERATURE
MAX2701-20
VCC (V)
ICC (mA)
TA = +85°C
TA = +25°C
TA = -45°C
10
13
12
11
14
15
16
17
18
19
20
2100 2200 2300 2400 2500
LNA GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-21
FREQUENCY (MHz)
GAIN (dB)
TA = -45°C
TA = +25°CTA = +85°C
HIGH-GAIN MODE
-5
-2
-3
-4
-1
0
1
2
3
4
5
2100 2200 2300 2400 2500
LNA GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-22
FREQUENCY (MHz)
GAIN (dB)
TA = +85°CTA = +25°CTA = -45°C
LOW-GAIN MODE
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2701
MAX2700
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
12 ______________________________________________________________________________________
0
2
1
4
3
5
6
-45 15 35-25 -5 55 75
LNA IIP3 vs. TEMPERATURE
MAX2701-26
TEMPERATURE (°C)
IIP3 (dBm)
HIGH-GAIN MODE
LOW-GAIN MODE
-1
1
0
3
2
5
4
6LNA IIP3 vs. VCC
MAX2701-27
VCC (V)
IIP3 (dBm)
2.50 2.75 3.00 3.25 3.50
HIGH-GAIN MODE
LOW-GAIN MODE
10
12
16
14
18
20
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2701-25
FREQUENCY (MHz)
NF (dB)
2100 23002200 2400 2500
TA = +85°CTA = +25°CTA = -45°C
LOW-GAIN MODE
3.5
3.0
2.5
2.0
1.52100 23002200 2400 2500
LNA NOISE FIGURE vs. FREQUENCY
vs. TEMPERATURE
MAX2701-24
FREQUENCY (MHz)
NF (dB)
TA = -45°C
TA = +25°C
TA = +85°C
HIGH-GAIN MODE
15
17
16
19
18
21
20
22
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-28
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
2.1 2.2 2.3 2.4 2.5
TA = -45°C
TA = +25°CTA = +85°C
DOUBLER ENABLED
-34
-32
-28
-30
-26
-24
LNA REVERSE ISOLATION
vs. FREQUENCY
MAX2701-23
FREQUENCY (MHz)
S12 (dB)
2100 23002200 2400 2500
HIGH-GAIN MODE
LOW-GAIN MODE
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2701
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 13
-1
3
1
7
5
9
11
2.60 3.102.85 3.35
MIXER IIP3 vs. VCC vs. TEMPERATURE
MAX2701-32
VCC (V)
IIP3 (dBm)
TA = +85°C
TA = +25°C
TA = -45°C
DOUBLER ENABLED
0
20
10
40
30
50
60
2.60 3.102.85 3.35
MIXER IIP2 vs. VCC vs. TEMPERATURE
MAX2701-33
VCC (V)
IIP2 (dBm)
TA = -45°CTA = +85°C
TA = +25°C
DOUBLER ENABLED
7
8
9
10
11
12
13
14
15
2100 2200 2300 2400 2500
DSB MIXER NOISE FIGURE
vs. FREQUENCY vs. TEMPERATURE
MAX2701-31
FREQUENCY (MHz)
NF (dB)
TA = +25°C
TA = -45°C
TA = +85°C
10
12
14
16
18
20
22
24
2.1 2.2 2.3 2.4 2.5
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. LO POWER
MAX2701-30
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
PLO = -16dBm TO -10dBm
DOUBLER ENABLED
2.0
1.5
1.0
0.5
02.1 2.32.2 2.4 2.5
φ ERROR vs. LO FREQUENCY
MAX2701-34
FREQUENCY (GHz)
φ ERROR (DEGREES)
DOUBLER ENABLED
DOUBLER DISABLED
15
17
16
19
18
21
20
22
MIXER VOLTAGE GAIN vs. FREQUENCY
vs. TEMPERATURE
MAX2701-29
FREQUENCY (GHz)
VOLTAGE GAIN (dB)
2.1 2.2 2.3 2.4 2.5
TA = -45°C
TA = +25°CTA = +85°C
DOUBLER DISABLED
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2701
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
14 ______________________________________________________________________________________
0
40
20
100
80
60
160
140
120
180
0.50 1.000.75 1.25 1.50 1.75 2.00
MIXER BASEBAND BANDWIDTH vs. RL
MAX2701-37
RL (kΩ)
BANDWIDTH (MHz)
3dB BANDWIDTH
1dB BANDWIDTH
-40
-50
-60
-70
-801.150 1.2001.175 1.225 1.250
LO-LNAIN ISOLATION vs. LO FREQUENCY
MAX2701-36
FREQUENCY (GHz)
LO-LNAIN ISOLATION (dB)
DOUBLER ENABLED
DOUBLER DISABLED
1.0
1.6
1.4
1.2
1.8
2.0
2.2
2.4
2.6
2.8
3.0
2.5 2.92.7 3.1 3.3 3.5
MIXER OUTPUT 1dB COMPRESSION
POINT vs. VCC vs. RL
MAX2701-38
VCC (V)
MIXER OUTPUT (Vp-p)
RL = 1.05kΩ
RL = 2.00kΩ
RL = 0.56kΩ
-40
-50
-60
-70
-801.05 1.151.10 1.20 1.25
LO-RF ISOLATION vs. LO FREQUENCY
(INCLUDING BALUN)
MAX2701-35
FREQUENCY (GHz)
LO-RFIN ISOLATION (dB)
DOUBLER DISABLED
DOUBLER ENABLED
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2701
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 15
2.00
1.75
1.50
1.25
1.000.50 1.250.75 1.00 1.50 1.75 2.00
VGA1
VGA OUTPUT 1dB COMPRESSION
POINT vs. AGC VOLTAGE vs. RL
MAX2700/1-42
AGC (V)
V01 (PEAK TO PEAK)
RL = 0.6kΩ
RL = 2.0kΩ
RL = 1.1kΩ
RL = 1.6kΩ
20
30
50
40
60
70
0.6 1.00.8 1.2 1.4 1.6 1.8 2.0
VGA1
BANDWIDTH vs. RL
MAX2700/1-43
RL (kΩ)
VGA1 BANDWIDTH (MHz)
3dB BANDWIDTH
1dB BANDWIDTH
5
15
10
25
20
30
35
0.50 1.00 1.250.75 1.50 1.75 2.00
VGA1
NOISE FIGURE vs. AGC VOLTAGE
vs. TEMPERATURE
MAX2700/1-41
AGC (V)
NF (dB)
TA = -45°C
TA = +85°C
TA = +25°C
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
1.5
2.0
0.50 1.000.75 1.25 1.50 1.75 2.00
I/Q VOLTAGE GAIN MISMATCH
vs. TEMPERATURE
MAX2700/1-40
AGC (V)
I/Q VOLTAGE GAIN (dB)
TA = +25°C
TA = +85°CTA = -45°C
0
10
30
20
40
50
0.50 1.000.75 1.25 1.50 1.75 2.00
VGA2
VOLTAGE GAIN vs. AGC VOLTAGE
vs. TEMPERATURE
MAX2700/1-44
AGC (V)
VOLTAGE GAIN (dB)
TA = -45°C
TA = +85°C
TA = +25°C
0
10
30
20
40
0.50 1.000.75 1.25 1.50 1.75 2.00
AGC VOLTAGE GAIN vs. AGC VOLTAGE
vs. TEMPERATURE
MAX2700/1-39
AGC (V)
VOLTAGE GAIN (dB)
TA = +25°C
TA = -45°C
TA = +85°C
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2700/MAX2701
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
16 ______________________________________________________________________________________
20
40
60
80
100
VGA2
BANDWIDTH vs. RS
MAX2700/1-48
RS (kΩ)
VGA2 BANDWIDTH (MHz)
0.6 1.2 1.40.8 1.0 1.6 1.8 2.0
3dB BANDWIDTH
1dB BANDWIDTH
-60
-50
-55
-40
-45
-35
-30
100 500300 700 900 1100
VGA2
Q TO I CROSSTALK vs. RL
MAX2700/1-49
RL (Ω)
Q TO I CROSSTALK (dB)
1.8
1.9
2.1
2.0
2.2
2.3
0.75 1.251.00 1.50 1.75 2.00
VGA2
VGA OUTPUT 1dB COMPRESSION
POINT vs. AGC VOLTAGE vs. RL
MAX2700/1-47
AGC (V)
V01 (PEAK-TO-PEAK V)
RL = 1.025kΩ
RL = 0.1kΩ
RL = 0.56kΩ
RL = 0.25kΩ
0
0.4
1.2
0.8
1.6
2.0
0.50 1.000.75 1.25 1.50 1.75 2.00
VGA2
I/Q VOLTAGE GAIN MISMATCH WITH
GAIN CORRECTION
MAX2700/1-46
AGC (V)
I/Q MISMATCH (dB)
2dB INPUT MISMATCH
GAIN CORRECTION ENABLED
0
100
300
200
400
500
COMBINED VGA1 AND VGA2 TURN-ON TIME
vs. DC OFFSET CAPACITANCE*
MAX2700/1-50
DC OFFSET CAPACITANCE (nF)
TURN-ON TIME (µs)
05025 75 100
3
2
1
0
-10.50 1.250.75 1.00 1.50 1.75 2.00
VGA2
I/Q VOLTAGE GAIN MISMATCH
vs. TEMPERATURE
MAX2700/1-45
AGC (V)
I/Q VOLTAGE GAIN (dB)
TA = -45°C
TA = +85°C
TA = +25°C
0dB INPUT MISMATCH
GAIN CORRECTION DISABLED
Typical Operating Characteristics (continued)
(MAX2700/MAX2701 EV kit (Figure 3), VCC = +3.0V, TA= +25°C, SHDN = GAIN_SET = VCC, X2_EN = GND, CEXT+ connected to
CEXT-, PLO = -13dBm, FLO = 980MHz (MAX2700) and 1200MHz (MAX2701), PLNAIN = -30dBm, PRFIN = -25dBm, LNAIN and RFIN
(single-ended input to balun) driven from 50Ωsource, LNAOUT terminated into load; MIX_I, MIX_Q AC-coupled to 2kΩload; IIN1+,
QIN1+, IIN2+, QIN2+ driven from 1.1kΩAC-coupled source; IOUT1, QOUT1 AC-coupled to 2kΩ; IOUT2, QOUT2 AC-coupled to
100Ω; input to VGAs, 20mVp-p at 1MHz tone, set VAGC = 1.25V, unless otherwise noted.)
MAX2700/MAX2701
*C19, C23, C30, C36 in the
EV kit schematic in Figure 3
represent DC offset capacitors.
Time from SHDN = GND to
SHDN = VCC, until DC quiescent
point settles within 10% of static
DC quiescent point.
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 17
PIN NAME FUNCTION
1 CEXT- Inverting Input Port of VGA2 I/Q Gain Imbalance Correction Circuitry. Connect an
external capacitor between CEXT- and CEXT+ to activate the circuit. Short CEXT- to
CEXT+ to disable.
2 CEXT+ Noninverting Input Port of VGA2 I/Q Gain Imbalance Correction Circuitry. Connect an
external capacitor between CEXT+ and CEXT- to activate the circuit. Short CEXT- to
CEXT+ to disable.
3, 12, 17, 29, 38,
48 VCC Supply Voltage. Bypass VCC to GND with capacitors as close to pin as possible.
4X2_EN Logic-Level Enable for Doubler Circuitry. Drive logic low to turn on the doubler
(fLO = fRFIN/2). Drive logic high to bypass the doubler (fLO = fRFIN).
5, 7, 8, 13, 15,
32, 44, 46 GND Ground. Connect to ground plane with minimal inductance.
6 LNAIN LNA Input. Connect to GND to turn the LNA off. Off-chip 50Ω match required.
9 GAIN_SET LNA Gain Select Input. Drive logic high to select the high-gain mode. Drive logic low to
select low-gain mode.
10 SHDN Shutdown Control Input. Drive logic low to enable shutdown mode.
11 AGC Automatic Gain-Control Input for AGC. Bypass this pin with a 1000pF capacitor to
GND to minimize coupling.
14 LNAOUT LNA Output. This pin requires an external pullup inductor and off-chip 50Ω match.
16 MIX_Q Mixer Q-Channel Baseband Output. Connect external series capacitor to AC-couple
the output to the load.
18 QIN1+ Noninverting VGA1, Q-Channel Baseband Input
19 QIN1- Inverting VGA1, Q-Channel Baseband Input
20 DCQ1+ Noninverting Offset Correction Input for Q-Channel VGA1 Amplifier
21 DCQ1- Inverting Offset Correction Input for Q-Channel VGA1 Amplifier
22 QOUT1 Q-Channel VGA1 Amplifier Baseband Output
23 MIXTNK Inductive Common-Mode Degeneration Pin for Mixer Stages
24 QIN2+ Noninverting VGA2, Q-Channel Baseband Input
25 QIN2- Inverting VGA2, Q-Channel Baseband Input
26 DCQ2+ Noninverting Offset Correction Input for Q-Channel VGA2 Amplifier
27 DCQ2- Inverting Offset Correction Input for Q-Channel VGA2 Amplifier
28 QOUT2 Q-Channel VGA2 Amplifier Baseband Output
30 RFIN+ I/Q Mixers Inverting Input. For narrow frequency bands between 1.8GHz and 2.5GHz,
port must be matched using external matching components.
Pin Description
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
18 ______________________________________________________________________________________
Detailed Description
The MAX2700/MAX2701 consist of five major blocks:
LNA, I/Q direct demodulator, VGAs, gain correction,
and bias circuits.
Low-Noise Amplifier
The LNA is a two-gain-level amplifier with low noise fig-
ure and high IIP3. Connect GAIN_SET to GND to switch
the amplifier to a low-gain mode that provides an accu-
rate gain step. High IIP3 minimizes the cross-modula-
tion between TX power leakage and close-in interferers
at the RX input. The LNA can be turned off independent
of the other functional blocks by connecting LNAIN to
GND. External matching is required to match the input
and output to 50Ω. The LNA in Figures 1 and 2 is
matched to 1960MHz and 2400MHz over a narrow
bandwidth.
I/Q Demodulator
The direct I/Q demodulator downconverts the RF signal
directly to baseband I and Q signals. This architec-
ture’s main advantage is that the received signal is
amplified and filtered at baseband rather than at some
high intermediate frequency. This eliminates the need
for an expensive IF SAW filter and the IF oscillator.
Furthermore, the direct conversion scheme eliminates
the need for image rejection, thereby relaxing the
bandpass filter selectivity requirements following the
LNA. The direct downconverter consists of highly linear
double-balanced I/Q mixers, an LO frequency doubler
option, an LO quadrature generator, and baseband I/Q
buffer amplifiers driven by the mixers’ outputs.
In a direct downconversion receiver, I/Q mixers have
more stringent requirements on mixer output linearity
since they need to handle large voltage swings at
baseband due to close-in interferers. The RF signal is
applied to the differential input (RFIN+, RFIN-) of the
direct downconversion receiver through an off-chip
balun. The differential input structure results in a higher
common-mode rejection for second-order nonlinearity
generated in the receiver’s front end. The differential
input requires matching to appropriate impedance of
the balun. Some applications may require a bandpass
filter between the LNA and the mixer, as shown in
Figures 1 and 2, to attenuate the residual transmit
power leakage and out-of-band spurious signals.
The mixer baseband buffers amplify the mixer I and Q
differential outputs and convert them to single-ended
outputs (MIX_I, MIX_Q). These buffer amplifiers have
PIN NAME FUNCTION
31 RFIN- I/Q Mixers Noninverting Input. For narrow frequency bands between 1.8GHz and
2.5GHz, port must be matched using external matching components.
33 IOUT2 I-Channel VGA2 Baseband Output
34 DCI2- Inverting Offset Correction Input for I-Channel VGA2 Amplifier
35 DCI2+ Noninverting Offset Correction Input for I-Channel VGA2 Amplifier
36 IIN2- Inverting VGA2, I-Channel Baseband Input
37 IIN2+ Noninverting VGA2, I-Channel Baseband Input
39 IOUT1 I-Channel VGA1 Amplifier Baseband Output
40 DCI1- Inverting Offset Correction Input for I-Channel VGA1 Amplifier
41 DCI1+ Noninverting Offset Correction Input for I-Channel VGA1 Amplifier
42 IIN1- Inverting VGA1, I-Channel Baseband Input
43 IIN1+ Noninverting VGA1, I-Channel Baseband Input
45 MIX_I Mixer I-Channel Baseband Output. Connect external series capacitor to AC-couple the
output to the load.
47 LO LO Input. Internally matched to 50Ω.
Pin Description (continued)
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 19
very low output impedance (<2Ω). The smallest load
that should be used is 600Ω. At the output of the I/Q
mixers’ buffers, baseband lowpass filters should be
used to provide adjacent and alternate channel selectiv-
ity. This reduces the level of adjacent channel and
close-in interferers to the input of the following base-
band amplifier.
The LO signal is applied externally to the LO input port.
An LO doubler circuit doubles the LO signal frequency
before it is applied to the mixer LO port. Connect
X2_EN to ground to enable the LO doubler circuit. With
this circuit enabled, the required LO frequency is half
that of the RF carrier frequency. Connect X2_EN to VCC
to disable the frequency doubler circuit and the LO fre-
quency is the same as the RF carrier frequency. The
half LO frequency scheme results in the use of lower
frequency and lower cost VCOs. It also reduces the LO
leakage to the receiver’s input. The mixer is guaranteed
QOUT2IOUT2
IIN2-
IIN2+
IOUT1
IIN1-
IIN1+
MIX_I
SHDN LNAIN
BIAS
X2
BIAS HIGH-GAIN AMP
GAIN_SET
QIN2-
QIN2+
QOUT1
QIN1-
QIN1+
RFIN+
MIX_Q
X2_EN
LO
LD GENERATOR
DOUBLER
BIAS
BLOCK
MST
SHDN
LNAOUT
RFIN-
MULTIPLEXER
AMP
AMP
I_CHANNEL
AGC1 I_CHANNEL AGC1 Q_CHANNEL
AGC2 I_CHANNEL AGC2 Q_CHANNEL
Q_CHANNEL
Q_CHANNEL
I_CHANNEL
DOUBLE BALANCED
MIXER
OFFSET CORRECTION
LOOP
OFFSET CORRECTION
LOOP
OFFSET CORRECTION
LOOP
OFFSET CORRECTION
LOOP
VGA CONTROL
POLYPHASE RC
QUADRATURE
GENERATOR
LOW-GAIN AMP
LNA BLOCK
Functional Diagram
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
20 ______________________________________________________________________________________
VCC
5.6nH
5pF
DUPLEXER
FROM
TRANSMITTER
BPF
LPF_1
I-CHANNEL
LOAD
Q-CHANNEL
LOAD
LPF_2
LPF_Q2
LPF_Q1
IOUT2
QOUT2
VCC
QIN2+
GND
LNAIN
VCC
VCC
GND
CEXT-
MIX_I
GAIN_SET
CEXT+
MIX_Q
IIN1+
IOUT1
LO
GND
QIN1+
DCQ1+
QOUT1
IIN2-
DCI2-
DCQ2+
QIN2-
VCC
100pF
VCC
RFIN+
GND
GND
X 2
O/I
O
1
2
3
5
8
6
7
10
9
4
11
12
13 14 1615 18 19 20 21 22 23 24
25
26
27
28
29
30
31
32
33
34
35
36
48 37383940
41424344454647
I/Q
SHDN
GND
AGC
LNAOUT
QIN1-
DCQ1-
DCQ2-
RFIN-
GND
DCI2+
IIN2+
DCI1+
IIN1-
VCC
GND
LO
INPUT 68pF
RX ENABLE
DOUBLER
ENABLE/DISABLE
LNA GAIN
SELECT
AGC
DCI1-
CEXT
RF
INPUT
22pF
1pF
22pF T-LINE
BALUN
50Ω
4.7nH
4.7nH
50ΩQ2
0.1µF
0.056µF
0.1µF
0.1µF
0.056µF
0.056µF
0.01µF100pF
22pF
6pF
68pF
4.7nH
100pF
1000pF
0.01µF
VCC
1000pF
68pF
TO ALL
VCC PINS
0.1µF
68pF
680Ω
2.2k
1k
1k
0.1µF
0.1µF
10µF
0.56µF
2.2k
680Ω
0.56µF
0.1µF
0.056µF
1k
0.1µF
0.1µF
2.2k
680Ω
0.1µF 0.1µF0.1µF
680Ω
2.2k
1k
X2_EN
68pF
MAX2700
CTRL 1 CTRL 2
DETECT
17
1
1.5nH
68pF
MIXTNK
Figure 1. MAX2700 Typical Operating Circuit (1960MHz)
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 21
MAX2701
VCC
MIXTNK
DUPLEXER
FROM
TRANSMITTER
BPF
LPF_1
I-CHANNEL
LOAD
Q-CHANNEL
LOAD
LPF_2
LPF_Q2
LPF_Q1
IOUT2
QOUT2
VCC
QIN2+
GND
LNAIN
VCC
VCC
GND
CEXT-
MIX _I
GAIN_SET
CEXT+
MIX_Q
IIN1+
IOUT1
LO
GND
QIN1+
DCQ1+
QOUT1
IIN2-
DCI2-
DCQ2+
QIN2-
VCC
VCC
VCC
RFIN+
GND
GND
X 2
1
2
3
5
8
6
7
10
9
4
11
12
13 14 1615 17 18 19 20 21 22 23 24
25
26
27
28
29
30
31
32
33
34
35
36
48 37383940
41424344454647
I/OO
I/Q
SHDN
GND
AGC
LNAOUT
QIN1-
DCQ1-
DCQ2-
RFIN-
GND
DCI2+
IIN2+
DCI1+
IIN1-
VCC
GND
LO
INPUT 68pF
1000pF
100pF
RX ENABLE
DOUBLER
ENABLE/DISABLE
LNA GAIN
SELECT
AGC
DCI1-
CEXT
RF
INPUT
22pF
22pF
68pF
T-LINE
BALUN
50ΩI2
50Ω
2.7nH
2.7nH
Q2
0.1µF
0.056µF
0.1µF
0.1µF
0.056µF
0.056µF
0.01µF100pF
22pF
2.7nH
2pF
1nH
68pF
0.5pF
10pF
VCC
1000pF
68pF
0.5pF
TO ALL
VCC PINS
0.1µF
0.01µF
68pF
68pF
680Ω
2.2k
1k
1k
0.1µF
0.1µF
10µF
0.56µF
2.2k
680Ω
0.56µF
0.1µF
0.056µF
1k
0.1µF
0.1µF
2.2k
680Ω
0.1µF 0.1µF
0.1µF
680Ω
2.2k
1k
X2_EN
CTRL 2CTRL1
DETECT
1
1000pF
5.6nH
3pF
Figure 2. MAX2701 Typical Operating Circuit (2400MHz)
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
22 ______________________________________________________________________________________
VCC
J19
J20 C46
68pF
C45
1000pF
+C4
10µF
29
30
32
33
34
35
36
VCC
RFIN+
RFIN-
GND
25
26
27
28
QIN2-
DCQ2+
DCQ2-
QOUT2
IOUT2
DCI2-
DCI2+
IIN2-
8
7
6
5
4
3
2
1
VCC
LNAIN
GND
12
11
10
9
X2_EN
VCC
CEXT+
CEXT-
41
42
43
44
45
46
47
48
DCI1+
IIN1-
IIN1+
GND
37
38
39
40
IIN2+
VCC
IOUT1
DCI1-
MIX_I
GND
LO
VCC
20
19
18
17
16
15
14
13
QIN1-
DCQ1+
MIXTNK
QIN2+
QIN1+
VCC
24
23
22
21
QOUT1
DCQ1-
MIX_Q
GND
LNAOUT
GND
GND
GND
AGC
GAIN_SET
SHDN
C8
100pF
C9
0.01µF
C7
1000pF
C6
1000pF
C2
68pF
C3
1000pF
C1
0.01µF
C40
22pF
J1
VCC R1
0Ω
R2
100Ω
R5
100Ω
R6
100Ω
J2
VCC R3
0Ω
R4
0Ω
J5
VCC R9
0Ω
R10
0Ω
J4
VCC R7
0Ω
R8
0Ω
X2EN
Z4
6pF
(1nH)
C43
68pF
C5
0Ω
(10pF)
Z1
4.7nH
(0.5pF)
J4
C10
68pF
VCC R12
0Ω
R11
100Ω
1
C25
68pF
C30
0.1µF
C23
0.1µF
VCC
R26
0Ω
L6
4.7nH
(2.7nH)
L5
4.7nH
(2.7nH)
C31
0.1µF
R29
820Ω
C22
0.1µF
R23
820Ω
C24
0.56µF
C29
0.56µF
C27
22pF
C26
22pF
R27
51ΩJ13
R28
51Ω
R24
51ΩJ11
J12
R25
51Ω
C28
1pF
(5pF) 2
34BALUN/TOKO/B4F
5
U1
MAX2700
MAX2701
VCC
R40
0Ω
VCC
R32
0Ω
L7
0Ω
C48
OPEN
C41
OPEN
C47
OPEN
C42
OPEN
C33
100pF C34
0.1µF
J18
C37
0.1µF
R35
820Ω
C36
0.1µF
C39
0.56µF
R39
1k
R38
1k
J17
C38
0.1µF
R36
1.1k R37
3.6k
R44
51Ω
J16
C35
0.56µF
R33
1.1k
R34
1k
J15
C32
0.1µF
R30
1.1k R31
3.6k
R43
51Ω
J14
C18
0.1µF
R18
820Ω
C19
0.1µF
C15
0.56µF
R14
1k
R13
1k
C17
0.1µF
R16
1.1k R41
51Ω
R17
3.6k
C20
0.56µF
R19
1k R20
1k
C21
0.1µF
R22
1.1k
R21
3.6k
R42
51Ω
21
C49
5pF
(3pF)
L4
5.6nH
VCC R15
0Ω
C16
0.1µF
C14
100pF
GND
C11
68pF
VCC R45
0ΩL3
C12
22pF
C13
(2pF)
OPEN
J6 J7 J8 J9 J10
31
() ARE FOR MAX2701EV KIT ONLY.
Figure 3. MAX2700/MAX2701 EV kit Schematic
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 23
to operate without degrading its performance over the
LO power range of -10dBm to -16dBm. The quadrature
generator consists of a wideband polyphase network.
Each output of the polyphase filter is buffered, ampli-
fied, and then fed to the mixer’s differential LO port.
Variable Gain Amplifier (VGA)
The AGC in each baseband channel I/Q is implement-
ed by two variable gain amplifiers with equal gains.
Each amplifier provides about 40dB voltage gain at the
maximum setting and 30dB of gain control. The first
baseband VGA (VGA1) is a cascaded wideband ampli-
fier with differential input and single-ended output. It is
optimized for low noise in the high-gain state and has
low-power dissipation and sufficient linearity in all gain
settings to ensure desired compression performance.
The second baseband VGA (VGA2) is a multistage
wideband amplifier with differential inputs and a single-
ended output. In each channel, connect a baseband
lowpass filter between VGA1 and VGA2 to provide
additional channel selectivity at the adjacent channel. If
the VGA amplifiers are driven single ended, the com-
plementary input of VGA should be AC-coupled to
ground through a matched source impedance.
VGA Offset Correction
An internal offset correction feedback amplifier associ-
ated with each VGA removes the DC offsets present in
the VGAs. Offset correction preserves maximum output
compression performance during maximum gain condi-
tions. Each offset correction loop effectively AC-cou-
ples the associated VGA signal path. Each VGA1
network yields a highpass corner frequency according
to the following:
f-3dB (Hz) = 5300 / CDC (nF) (VAGC = 2.0V)
f-3dB (Hz) = 700 / CDC (nF) (VAGC = 0.5V)
where CDC is the value of the capacitors, in nano-
farads, across DCI1+, DCI1- and DCQ1+, DCQ1-. Note
that the corner frequency is a function of the gain set-
ting, increasing with increasing gain. Each VGA2 net-
work provides a highpass corner frequency predicted
by the following:
f-3dB (Hz) = 145 / CDC (µF)
where CDC is the value of the capacitors, in micro-
farads, across DCI2+, DCI2- and DCQ2+, DCQ2-.
The time constants associated with the offset correction
networks limit turn-on time. For applications where the
turn-on time is critical, the offset correction networks
can be disabled by shorting the corresponding pins
together (DCI1+ to DCI1-, DCQ1+ to DCQ1-, DCI2+ to
DCI2-, and DCQ2+ to DCQ2-).
VGA2 I/Q Gain Mismatch Correction
The signal amplitudes at the outputs of the I- and Q-
channel VGA2 amplifiers are compared, and any differ-
ence is corrected by a differential feedback network
associated with the gain control circuitry. Differential
amplitude information is extracted by use of a single
external capacitor across pins 1 and 2 (CEXT- and
CEXT+). The residual difference signal is amplified and
fed back to the gain control network, increasing the
gain of the channel with the smaller signal while
decreasing the gain of the larger signal’s channel. This
network will correct amplitude mismatches generated
by gain mismatches in the previous stages of the
receiver (the mixer and VGA1), as well as insertion-loss
mismatch. The correction network is capable of
decreasing up to 2dB of amplitude mismatch at the
inputs of the I/Q VGA2 amplifiers to <0.5dB amplitude
mismatch. The gain correction network can be disabled
by shorting CEXT- to CEXT+.
Bias Circuit
Operate the MAX2700/MAX2701 in shutdown mode by
connecting SHDN to GND, reducing current consump-
tion to 20µA. In shutdown mode, bias current to all the
blocks is turned off through a master shutdown circuit.
In applications where the LNA is not used, turn off the
LNA by connecting the LNAIN to ground.
Applications Information
LNA Matching
The MAX2700/MAX2701 are designed to operate from
1.8GHz to 2.1GHz and 2.1GHz to 2.5GHz, respectively.
The LNAs in Figures 1 and 2 are optimized for noise
figure and gain centered around 1960MHz and
2400MHz, respectively. Operation at other frequencies
in the band requires reoptimization of the input and out-
put matching circuits. The noise figure is sensitive to
input matching and losses in the input traces. LNA
input matching should be optimized for desired noise
figure, gain, and VSWR performance. High Q matching
elements should be used at the LNA input. Proper
board layout is essential to increase the isolation
between LO and the LNA input. This minimizes LO
leakage and thus DC offset.
I/Q Demodulator Input Matching
The RF input match of the I/Q demodulator in Figure 1
and 2 are optimized for 1960MHz and 2400MHz opera-
tion, respectively. For operation at a different frequency,
the matching circuit should be reoptimized. Single-
ended operation at the demodulator is achieved through
the use of an off-chip balun transformer. In Figure 1, the
balun, inductors, and capacitors constitute the matching
circuit of the differential I/Q demodulator input.
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
24 ______________________________________________________________________________________
I/Q Mixer and VGA1
Output Load Requirements
To retain acceptable linearity performance, the mixer
and VGA1 output loads should be >600Ω.
Layout Issues
A properly designed PC board is an essential part of
any RF/microwave circuit. Use controlled impedance
lines on all frequency inputs and outputs. Use low-
inductance connections to ground on all ground pins
and wherever the components are connected to
ground. Place decoupling capacitors close to all VCC
connections. For proper chip operation, the metal pad-
dle at the back of the chips must be grounded through
via holes in the board.
Table 2. MAX2700 LNA S-Parameters Low-Gain Mode (VCC = 3.0V)
Table 1. MAX2700 LNA S-Parameters High-Gain Mode (VCC = 3.0V)
FREQUENCY (GHz)
|S11| ∠S11 |S21| ∠S21 |S12| ∠S12 |S22| ∠S22
1.70 0.542 -84.1 7.09 53.97 0.023 65.36 0.367 37.3
1.75 0.485 -82.9 7.412 41.4 0.025 46.6 0.286 11.4
1.80 0.471 -80.1 7.268 29.5 0.024 34.3 0.216 -23.1
1.85 0.466 -78.8 7.07 19.9 0.0243 29.6 0.185 -68.4
1.90 0.443 -79.2 6.977 10.1 0.025 22.5 0.217 -99.5
1.95 0.441 -79.3 6.635 0.2 0.025 13.8 0.306 -127
2.00 0.436 -84.8 6.115 -7.96 0.024 16.4 0.387 -152.8
2.05 0.324 -88.3 6.119 -13.47 0.0338 15.23 0.408 -165
2.10 0.288 -74.9 5.947 -22.7 0.0383 -4.813 0.476 -176.7
2.15 0.300 -66.7 5.687 -31.1 0.0387 -20.7 0.529 172
2.20 0.320 -63.1 5.31 -40.5 0.0384 -32.8 0.587 162.4
FREQUENCY (GHz) |S11| ∠S11 |S21| ∠S21 |S12| ∠S12 |S22| ∠S22
1.70 0.637 -65.6 0.731 52.5 0.018 77 0.398 41.5
1.75 0.625 -66.3 0.763 42.9 0.018 52 0.328 21.8
1.80 0.622 -67.1 0.772 31.3 0.016 40 0.258 -7
1.85 0.618 -67.3 0.76 21.2 0.014 39 0.191 -45
1.90 0.617 -67 0.758 10.3 0.014 38 0.203 -79
1.95 0.617 -69.2 0.717 -1.1 0.015 34 0.238 -114
2.00 0.616 -70.1 0.678 -10.7 0.014 24 0.332 -141
2.05 0.611 -71.8 0.603 -13 0.022 37.6 0.323 -105
2.10 0.611 -74.5 0.634 -19.5 0.028 13.4 0.36 -170
2.15 0.61 -76.8 0.634 0.27 0.03 -5 0.402 -178
2.20 0.6 -80 0.621 -37 0.033 -14 0.484 174
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 25
Table 6. MAX2701 Mixer RFIN+ Input
S-Parameters (VCC = 3.0V)
FREQUENCY (GHz) |S11| ∠S11
2.10 0.590 -152
2.15 0.600 -161
2.20 0.604 -171
2.25 0.619 180
2.30 0.634 171
2.35 0.651 162.7
2.40 0.663 154
2.45 0.675 147
2.50 0.690 142
Table 5. MAX2700 Mixer RFIN+ Input
S-Parameters (VCC = 3.0V)
Table 4. MAX2701 LNA S-Parameters Low-Gain Mode (VCC = 3.0V)
FREQUENCY (GHz)
|S11| ∠S11 |S21| ∠S21 |S12| ∠S12 |S22| ∠S22
2.10 0.589 -102.2 0.684 -36.2 0.025 -10.36 0.46 -157
2.15 0.59 -106.12 0.662 -45.2 0.029 -21.6 0.49 -172
2.20 0.591 -111.15 0.644 -52.8 0.032 -35.3 0.51 176.7
2.25 0.596 -117.3 0.63 -60.4 0.033 -50.4 0.54 165
2.30 0.594 -125.2 0.621 -69 0.036 -62.2 0.56 154.5
2.35 0.58 -134 0.608 -77.8 0.037 -76.5 0.58 145.2
2.40 0.548 -144 0.589 -87.8 0.038 -96 0.6 136.5
2.45 0.506 -154.4 0.556 -98 0.035 -109 0.62 129
2.50 0.469 -164 0.519 -107 0.029 -120 0.63 122
FREQUENCY (GHz) |S11| ∠S11
1.70 0.612 -101.2
1.75 0.637 -105
1.80 0.624 -111.5
1.85 0.615 -116
1.90 0.607 -121
1.95 0.603 -128
2.00 0.598 -135
Table 3. MAX2701 LNA S-Parameters High-Gain Mode (VCC = 3.0V)
FREQUENCY (GHz)
|S11| ∠S11 |S21| ∠S21 |S12| ∠S12 |S22| ∠S22
2.10 0.303 -110 6.71 -32.9 0.036 -28.1 0.563 -162.5
2.15 0.283 -108 6.35 -42.7 0.04 -42.6 0.61 -178
2.20 0.269 -108 5.98 -49.8 0.042 -55 0.63 168.4
2.25 0.260 -109 5.7 -56.6 0.042 -67.4 0.64 155.4
2.30 0.254 -111 5.37 -63.4 0.043 -80 0.64 144
2.35 0.250 -114.6 5.08 -69.7 0.043 -92 0.632 134.4
2.40 0.241 -120 4.82 -75.7 0.04 -104 0.626 127
2.45 0.230 -129 4.55 -81.5 0.037 -114 0.625 121
2.50 0.218 -139 4.37 -87 0.035 -122 0.635 116
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
26 ______________________________________________________________________________________
DOUBLER DISABLED
XX
XX22
22__
__EE
EENN
NN = VCC DOUBLER ENABLED
XX
XX22
22__
__EE
EENN
NN = 0
FREQUENCY
(GHz)
|S11| ∠S11
FREQUENCY
(GHz)
|S11| ∠S11
1.70
0.03 92
850
0.479 -50.6
1.75
0.053 116
875
0.474 -50.1
1.80
0.086 123
900
0.466 -51.6
1.85
0.108 127
925
0.456 -52
1.90
0.135 128
950
0.442 -52
1.95
0.161 132
975
0.424 -53
2.00
0.186 136
1000
0.403 -53.6
——
—
1025
0.384 -54
——
—
1050
0.365 -54
Table 8. MAX2701 LO Input S-Parameters
(X2_EN = 1, X2_EN = 0)
Chip Information
TRANSISTOR COUNT: 3307
DOUBLER DISABLED
XX
XX22
22__
__EE
EENN
NN = VCC DOUBLER ENABLED
XX
XX22
22__
__EE
EENN
NN = 0
FREQUENCY
(GHz)
|S11| ∠S11
FREQUENCY
(GHz)
|S11| ∠S11
2.10
0.257 160
1.05
0.358 -53.4
2.15
0.279 164
1.10
0.341 -53
2.20
0.299 167
1.15
0.32 -52
2.25
0.314 171
1.20
0.299 -52
2.30
0.33 174
1.25
0.268 -51
2.35
0.347 178
—
——
2.40
0.357 -179
—
——
2.45
0.366 -175
—
——
2.50
0.373 -171
—
——
Table 7. MAX2700 LO Input S-Parameters
(X2_EN = 1, X2_EN = 0)
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
______________________________________________________________________________________ 27
Package Information
48L,TQFP.EPS
MAX2700/MAX2701
1.8GHz to 2.5GHz Direct Downconversion
Receivers
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
28 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information (continued)