General Description
The MAX2387/MAX2388/MAX2389 low-noise amplifier
(LNA), downconverter mixers designed for W-CDMA
applications, are ideal for ARIB (Japan) and ETSI-
UMTS (Europe) based systems. The MAX2387/
MAX2388/MAX2389 feature ultra-low current consump-
tion and exceptionally low noise figures in ultra-small
packages.
The MAX2387/MAX2388 include an LNA, a downcon-
verter mixer, and a local-oscillator (LO) buffer. The
MAX2389 has an LNA and mixer, but minimizes current
consumption by omitting the LO buffer. For all devices,
the LNA and downconverter mixers are optimized for
the 2110MHz to 2170MHz band. All devices feature a
high-gain mode and a low-gain mode of LNA operation.
The MAX2387 has a 32dB gain step, and the
MAX2388/MAX2389 have an 18dB gain step. All ICs
include a shutdown mode, powering down the IC dur-
ing the front-end receiver’s idle periods.
The mixer 3rd-order nonlinearity performance is set
using an external biasing resistor. For the MAX2387/
MAX2388, mixer performance is optimized for a
-10dBm typical drive at the LO buffer input port. The
MAX2389 mixer performance is optimized for a
-4dBm typical drive at the LO input port. The LO port
for all versions is configurable for either single-ended or
differential operation.
These devices operate from a +2.7V to +3.3V single sup-
ply and are available in ultra-small (3mm ✕3mm) 12-pin
leadless packages (QFN).
________________________Applications
Japanese 3rd-Generation W-CDMA Cellular
Phones
Dual-Mode W-CDMA/GSM Cellular Phones
Features
♦Ultra-Low Current Consumption: 10.7mA
(MAX2387), 9.9mA (MAX2388), and 7.9mA
(MAX2389)
♦+2.7V to +3.3V Single-Supply Operation
♦Mixer NF: 7dB SSB
♦Cascaded Noise Figure: 2.3dB
♦LNA Low-Gain Mode: 32dB Gain Step (MAX2387)
or 18dB Gain Step (MAX2388/MAX2389)
♦Mixer IIP3: 6dBm
♦< 1µA Shutdown Current
♦Ultra-Small (3mm ✕ 3mm) 12-Pin QFN Package
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
________________________________________________________________ Maxim Integrated Products 1
MAX2387/MAX2388
TOP VIEW
12
BIAS
11
GND
10
LNA_IN
9VCC
8IF+
7IF-
45
LO+
6
LO-
1LNA_OUT
2GAIN
3MIX_IN
SHDN
BIAS
MAX2389
12
BIAS
11
GND
10
LNA_IN
9VCC
8IF+
7IF-
45
LO+
6
LO-
1LNA_OUT
2GAIN
3MIX_IN
SHDN
BIAS
Pin Descriptions/Functional Diagrams
19-1834; Rev 1; 5/01
EVALUATION KIT
AVAILABLE
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX2387EGC -40°C to +85°C 12 QFN
MAX2388EGC -40°C to +85°C 12 QFN
MAX2389EGC -40°C to +85°C 12 QFN
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +3.3V, SHDN = high, RBIAS = 24kΩ, no input AC signals, TA= -40°C to +85°C. Typical values are at VCC = +2.7V,
TA= +25°C, unless otherwise noted.)
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 +4.3V
SHDN, GAIN to GND..................................-0.3V to (VCC + 0.3V)
AC Signals ....................................................................+1V peak
Digital Input Current .........................................................±10mA
Continuous Power Dissipation (TA= +70°C)
12-Pin QFN (derate 11.9mW/°C above TA= +70°C)...952mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature (10s) ...........................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX2387 10.7 12.4
MAX2388 9.9 11.7
High-gain mode
MAX2389 7.9 9.3
MAX2387 7.2 8.7
MAX2388 6.7 8.1
Operating Supply Current ICC
Low-gain mode
MAX2389 4.7 5.7
mA
Shutdown Supply Current ICC SHDN = low 0.2 1.0 µA
Digital Input Logic High VIH 2.0 V
Digital Input Logic Low VIL 0.6 V
Input Logic High Current IIH VIN = VIH 1µA
Input Logic Low Current IIL VIN = VIL -20 µA
AC ELECTRICAL CHARACTERISTICS
(MAX238_ EV kit, VCC = 2.7V, SHDN = high, fRF_IN = fLNA_IN = 2140MHz, fLO = 2330MHz (fIF = 190MHz). Mixer, LNA, and LO input
ports are driven with 50Ωsources. RBIAS = 24kΩ±1%, PLO = -10dBm (MAX2387/MAX2388), PLO = -4dBm (MAX2389), PRF =
-30dBm. Typical values are at VCC = +2.7V, TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LNA PERFORMANCE: LOW-GAIN MODE (GAIN = HIGH)
RF Frequency Range (Note 1) fRF 2110 2170 MHz
TA = +25°C 13.5 15 16.5
Gain GLNA TA = -40°C to +85°C (Note 2) 12.9 17.0 dB
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Noise Figure (Notes 1, 3) NFLNA TA = +25°C 1.7 2.2 dB
3rd-Order Input Intercept Point
(Note 4) IIP3LNA TA = -40°C to +85°C (Note 2) 4.2 dBm
Input -1dB Compression Point
(Note 1) IP-1dB -19 -13 dBm
LNA PERFORMANCE: LOW-GAIN MODE (GAIN = LOW)
MAX2387 -18.5 -16.5 -14.5
TA = +25°CMAX2388/
MAX2389 -4.7 -2.8 -0.9
MAX2387 -10.5 -14
Gain GLNA
TA = -40°C to +85°C
(Note 2) MAX2388/
MAX2389 5.4 -0.7
dB
MAX2387 19.2 21.3
Noise Figure (Notes 1, 3) NFLNA MAX2388/
MAX2389 6.5 8.4 dB
MAX2387 1
3rd-Order Input Intercept Point
(Note 5) IIP3LNA MAX2388/
MAX2389 3.4 dBm
MAX2387 -9.9
Input -1dB Compression Point IP-1dB MAX2388/
MAX2389 -7.7 dBm
MIXER PERFORMANCE (GAIN = HIGH)
RF Frequency Range (Note 1) fRF 2110 2170 MHz
LO Frequency Range (Note 1) fLO 2250 2600 MHz
IF Frequency Range (Note 1) fIF 150 400 MHz
TA = +25°C 8.5 10 11.5
Power Conversion Gain GMXR TA = -40°C to +85°C (Note 2) 7.5 12.5 dB
MAX2387 7.2 8.8
MAX2388 6.8 8.2Noise Figure (SSB) (Note 1) NFMXR TA = +25°C
MAX2389 7.3 9.5
dB
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX238_ EV kit, VCC = 2.7V, SHDN = high, fRF_IN = fLNA_IN = 2140MHz, fLO = 2330MHz (fIF = 190MHz). Mixer, LNA, and LO input
ports are driven with 50Ωsources. RBIAS = 24kΩ±1%, PLO = -10dBm (MAX2387/MAX2388), PLO = -4dBm (MAX2389), PRF =
-30dBm. Typical values are at VCC = +2.7V, TA= +25°C, unless otherwise noted.)
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX238_ EV kit, VCC = 2.7V, SHDN = high, fRF_IN = fLNA_IN = 2140MHz, fLO = 2330MHz (fIF = 190MHz). Mixer, LNA, and LO input
ports are driven with 50Ωsources. RBIAS = 24kΩ±1%, PLO = -10dBm (MAX2387/MAX2388), PLO = -4dBm (MAX2389), PRF =
-30dBm. Typical values are at VCC = +2.7V, TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX2387 6
MAX2388 6
3rd-Order Input Intercept Point
(Notes 1, 3) IIP3MXR
MAX2389 5
dBm
MAX2387 -13.9 -10
MAX2388 -16.3 -10.5
Input -1dB Compression Point
(Note 1) IP
- 1dB
,
M XR TA = -40°C to +85°C
MAX2389 -15.4 -10.5
dBm
MIXER PERFORMANCE (GAIN = LOW)
TA = +25°C 7.5 9.0 10.5
Power Conversion Gain (Note 1) GMXR TA = -40°C to +85°C 6.5 12.0 dB
MAX2387 6.9 8.4
MAX2388 6.1 7.4Noise Figure (SSB) (Note 1) NFMXR TA = +25°C
MAX2389 6.6 8.8
dB
MAX2387 0.7
MAX2388 0.2
3rd-Order Input Intercept Point
(Note 4) IIP3MXR TA = +25°C
MAX2389 1.3
dBm
MAX2387 -15.0 -10.7
MAX2388 -18.2 -11.3
Input -1dB Compression Point
(Note 1) IP
- 1dB
,
M XR TA = -40°C to +85°C
MAX2389 -17.8 -11.9
dBm
Note 1: Guaranteed by design and characterization.
Note 2: MIN guaranteed by production test, MAX guaranteed by design and characterization.
Note 3: Includes input matching circuit loss.
Note 4: fIN1 = 2140MHz, fIN2 = 2141MHz, PIN = -30dBm per tone.
Note 5: fIN1 = 2140MHz, fIN2 = 2141MHz, PIN = -25dBm per tone.
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
_______________________________________________________________________________________ 5
2
6
4
10
8
14
12
16
-40 10-15 356085
MAX2387
SUPPLY CURRENT vs. TEMPERATURE
MAX2387/88/89 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V
CC
= +2.7V
HIGH-GAIN
V
CC
= +3.3V
LOW-GAIN
V
CC
= +4.3V
HIGH-GAIN
V
CC
= +4.3V
LOW-GAIN
V
CC
= +2.7V
LOW-GAIN
V
CC
= +3.3V
HIGH-GAIN
-20
-15
-10
-5
0
5
10
15
20
-40 -15 10 35 60 85
MAX2387/88/89 toc02
TEMPERATURE (°C)
GAIN (dB)
MAX2387
LNA GAIN vs. TEMPERATURE
HIGH-GAIN MODE
LOW-GAIN MODE
-10
-4
-6
-8
-2
0
2
4
6
8
10
-40 10-15 35 60 85
MAX2387/88/89 toc03
TEMPERATURE (°C)
IIP3 (dBm)
MAX2387
LNA IIP3 vs. TEMPERATURE
HIGH-GAIN MODE
LOW-GAIN MODE
0
4
2
8
6
10
12
-13 -11 -10-12 -9-8-7
MAX2387/88/89 toc04
LO INPUT LEVEL (dBm)
CONVERSION GAIN (dB)
HIGH-GAIN MODELOW-GAIN MODE
MAX2387
MIXER CONVERSION GAIN
vs. LO INPUT POWER
-10
-5
0
5
10
15
20
25
30
-40 -15 10 35 60 85
MAX2387
MIXER IIP2 AND IIP3 vs. TEMPERATURE
MAX2387/88/89 toc05
TEMPERATURE (°C)
IIP (dBm)
IIP2: HIGH-GAIN
MODE, DIFFERENTIAL
LO
IIP2: HIGH-GAIN
MODE, SINGLE-
ENDED LO
IIP3: HIGH-GAIN
MODE IIP3: LOW-GAIN
MODE
-16
-14
-10
-12
-8
-6
-40 10-15 35 60 85
MAX2387/88/89 toc06
TEMPERATURE
(
°C
)
-1dB COMPRESSION POINT (dBm)
MAX2387
MIXER INPUT -1dB COMPRESSION POINT
vs. TEMPERATURE
0
5
10
15
20
25
30
35
40
2300 23202310 2330 2340 2350 2360
MAX2387
MIXER LO-IF AND LO-RF ISOLATION
vs. LO FREQUENCY
MAX2387/88/89 toc07
FREQUENCY
(
MHz
)
ISOLATION (dB)
VCC = +2.7V
LO = -10dBm
LO-IF: HIGH-GAIN
MODE
LO-IF: LOW-GAIN
MODE
LO-RF: LOW-GAIN
MODE
LO-RF: HIGH-GAIN
MODE
0
5
15
10
20
25
2110 21302120 2140 2150 2160 2170
MAX2387
LNA NOISE FIGURE vs. FREQUENCY
MAX2387/88/89 toc08
FREQUENCY
(
MHz
)
NOISE FIGURE (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
8
7
6
5
4
-13 -10-12 -11 -9 -8 -7
MAX2387/88/89 toc09
LO POWER (dB)
NOISE FIGURE (dB)
MAX2387
MIXER NOISE FIGURE vs. LO POWER
HIGH-GAIN MODE
LOW-GAIN MODE
Typical Operating Characteristics
(TA = +25°C, VCC = +2.7V, unless otherwise noted.)
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
6 _______________________________________________________________________________________
2
6
4
10
8
14
12
16
-40 10-15 35 60 85
MAX2388
SUPPLY CURRENT vs. TEMPERATURE
MAX2387/88/89 toc10
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V
CC
= +2.7V
HIGH-GAIN
V
CC
= +4.3V
HIGH-GAIN
V
CC
= +3.3V
HIGH-GAIN
V
CC
= +3.3V
LOW-GAIN
V
CC
= +2.7V
LOW-GAIN
V
CC
= +4.3V
LOW-GAIN
-5
0
10
5
15
20
-40 10-15 35 60 85
MAX2387/88/89 toc11
TEMPERATURE (°C)
GAIN (dB)
MAX2388
LNA GAIN vs. TEMPERATURE
HIGH-GAIN MODE
LOW-GAIN MODE
-10
-4
-6
-8
-2
0
2
4
6
8
10
-40 10-15 356085
MAX2387/88/89 toc12
TEMPERATURE (°C)
IIP3 (dBm)
MAX2388
LNA IIP3 vs. TEMPERATURE
HIGH-GAIN MODE
LOW-GAIN MODE
0
4
2
8
6
10
12
-13 -11 -10-12 -9-8-7
MAX2387/88/89 toc13
LO INPUT LEVEL (dBm)
CONVERSION GAIN (dB)
HIGH-GAIN MODELOW-GAIN MODE
MAX2388
MIXER CONVERSION GAIN
vs. LO INPUT POWER
-10
-5
0
5
10
15
20
25
30
-40 -15 10 35 60 85
MAX2388
MIXER IIP2 AND IIP3 vs. TEMPERATURE
MAX2387/88/89 toc14
TEMPERATURE (°C)
IIP (dBm)
IIP2: HIGH-GAIN
MODE, DIFFERENTIAL LO
IIP2: HIGH-GAIN
MODE,
SINGLE-ENDED LO
IIP3: HIGH-GAIN
MODE IIP3: LOW-GAIN
MODE -16
-14
-10
-12
-8
-6
-40 10-15 35 60 85
MAX2387/88/89 toc15
TEMPERATURE (°C)
-1dB COMPRESSION POINT (dBm)
MAX2388
MIXER INPUT -1dB COMPRESSION POINT
vs. TEMPERATURE
0
5
10
15
20
25
30
35
40
2300 23202310 2330 2340 2350 2360
MAX2388
MIXER LO-IF AND LO-RF ISOLATION
vs. LO FREQUENCY
MAX2387/88/89 toc16
FREQUENCY (MHz)
ISOLATION (dB)
LO-RF: HIGH-GAIN
MODE
LO-RF: LOW-GAIN
MODE
LO-IF: LOW-GAIN
MODE
LO-IF: HIGH-GAIN
MODE VCC = +2.7V
LO = -10dBm
0
2
6
4
8
10
2110 21302120 2140 2150 2160 2170
MAX2388
LNA NOISE FIGURE vs. FREQUENCY
MAX2387/88/89 toc17
FREQUENCY (MHz)
NOISE FIGURE (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
8
7
6
5
4
-13 -10-12 -11 -9 -8 -7
MAX2387/88/89 toc18
LO POWER (dB)
NOISE FIGURE (dB)
MAX2388
MIXER NOISE FIGURE vs. LO POWER
HIGH-GAIN MODE
LOW-GAIN MODE
Typical Operating Characteristics (continued)
(TA = +25°C, VCC = +2.7V, unless otherwise noted.)
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
_______________________________________________________________________________________ 7
-40 10-15 356085
MAX2389
SUPPLY CURRENT vs. TEMPERATURE
MAX2387/88/89 toc19
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
0
4
2
8
6
10
12
V
CC
= +2.7V
HIGH-GAIN
V
CC
= +4.3V
HIGH-GAIN
V
CC
= +3.3V
LOW-GAIN
V
CC
= +2.7V
LOW-GAIN
V
CC
= +4.3V
LOW-GAIN
V
CC
= +3.3V
HIGH-GAIN
-5
0
10
5
15
20
-40 10-15 35 60 85
MAX2387/88/89 toc20
TEMPERATURE (°C)
GAIN (dB)
MAX2389
LNA GAIN vs. TEMPERATURE
HIGH-GAIN MODE
LOW-GAIN MODE
-10
-4
-6
-8
-2
0
2
4
6
8
10
-40 10-15 356085
MAX2387/88/89 toc21
TEMPERATURE (°C)
IIP3 (dBm)
MAX2389
LNA IIP3 vs. TEMPERATURE
HIGH-GAIN MODE
LOW-GAIN MODE
0
4
2
8
6
10
12
-13 -11 -10-12 -9-8-7
MAX2387/88/89 toc22
LO INPUT LEVEL (dBm)
CONVERSION GAIN (dB)
HIGH-GAIN MODELOW-GAIN MODE
MAX2389
MIXER CONVERSION GAIN
vs. LO INPUT POWER
-10
-5
0
5
10
15
20
25
30
-40 -15 10 35 60 85
MAX2389
MIXER IIP2 AND IIP3 vs. TEMPERATURE
MAX2387/88/89 toc23
TEMPERATURE (°C)
IIP (dBm)
IIP2: HIGH-GAIN
MODE,
DIFFERENTIAL LO
IIP2: HIGH-GAIN
MODE,
SINGLE-ENDED LO
IIP3: HIGH-GAIN
MODE IIP3: LOW-GAIN
MODE -16
-14
-10
-12
-8
-6
-40 10-15 35 60 85
MAX2387/88/89 toc24
TEMPERATURE (°C)
-1dB COMPRESSION POINT (dBm)
MAX2389
MIXER INPUT -1dB COMPRESSION POINT
vs. TEMPERATURE
10
15
20
25
30
35
40
45
50
2300 23202310 2330 2340 2350 2360
MAX2389
MIXER LO-IF AND LO-RF ISOLATION
vs. LO FREQUENCY
MAX2387/88/89 toc25
FREQUENCY (MHz)
ISOLATION (dB)
LO-RF: LOW-GAIN
MODE
LO-RF: HIGH-GAIN
MODE
LO-IF: LOW-GAIN
MODE
LO-IF: HIGH-GAIN
MODE VCC = +2.7V
LO = -4dBm
0
2
6
4
8
10
2110 21302120 2140 2150 2160 2170
MAX2389
LNA NOISE FIGURE vs. FREQUENCY
MAX2387/88/89 toc26
FREQUENCY (MHz)
NOISE FIGURE (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
4
5
7
6
8
9
-7 -5-6 -4 -3 -2 -1
MAX2389
MIXER NOISE FIGURE vs. LO POWER
MAX2387/88/89 toc27
LO POWER (dB)
NOISE FIGURE (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
Typical Operating Characteristics (continued)
(TA = +25°C, VCC = +2.7V, unless otherwise noted.)
MAX2387/MAX2388/MAX2389
Detailed Description
The MAX2387/MAX2388/MAX2389 include an LNA
and downconverter mixer. These devices feature a
shutdown mode to power down the IC during the front-
end receiver’s idle periods. Each IC operates from a
+2.7V to +3.3V single supply and is housed in a 12-pin
ultra-small QFN (3mm ✕3mm) leadless package.
The MAX2387/MAX2388/MAX2389 are fabricated using
an advanced high-frequency silicon germanium
process. The LNA and mixer NF and IIP3 have been
optimized to provide excellent RF performance in the
2110MHz to 2170MHz band, while drawing minimal
current.
For the MAX2387/MAX2388, the mixer’s performance is
optimized for a -10dBm typical drive at the LO buffer
input port. The MAX2389’s mixer performance is opti-
mized for a -4dBm typical drive at the LO input port.
The LO port for all versions can be driven either single-
ended or differentially.
LNA High/Low-Gain Mode
These devices offer two modes of operation for the LNA:
high-gain mode and low-gain mode, selectable with a
GAIN select pin. The MAX2387 has a gain of 15dB in
high-gain mode and -16.6dB in low-gain mode. The
MAX2388/MAX2389 have a gain of 15dB in high-gain
mode and -2.8dB in low-gain mode. Matching LNA in
high-gain mode will ensure matching in low-gain mode.
Downconverter Mixer
The receive mixer is a wideband, single-balanced
design with exceptional noise figure and linearity. The
LO input frequency range is 2330MHz to 2360MHz and
the RF input frequency range is 2110MHz to 2170MHz.
The mixer is internally matched to 50Ω, thus eliminating
any external matching components.
LO Input Buffers
The MAX2387/MAX2388 feature open-collector LO
buffers to increase isolation between the LO and the
rest of the system. The MAX2389 offers a lower current
consumption for applications that do not require an LO
buffer.
RF Inputs
The MIX_IN input is typically connected to the LNA out-
put through an off-chip filter providing image rejection
and out-of-band interferers filtering. The LNA input and
output require an external matching network to 50Ω.
Note that the mixer input is internally matched to 50Ω.
See Figure 1, Typical Application Circuits for 2.14GHz.
LO Inputs
The LO+ and LO- pins are internally terminated with
100Ωresistors. AC-couple the local-oscillator signal to
these pins. If a single-ended LO source is used, con-
nect LO+ to ground using an AC-coupling capacitor.
W-CDMA LNA/Mixer ICs
8 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 LNA_OUT RF Output Port for LNA. Requires external matching.
2 GAIN LNA/Mixer Gain Control Input
3 MIX_IN RF Input Port for Mixer. Internally matched to 50Ω.
4SHDN Shutdown Input. Drive low to enable shutdown mode. Drive high or connect to VCC for normal
operation.
5 LO+ Noninverting LO Input for LO Buffer (MAX2387/MAX2388) or Mixer (MAX2389). Differential input
impedance is 200Ω. AC-couple to GND when the LO is driven single-endedly.
6 LO- Inverting LO Input for LO Buffer (MAX2387/MAX2388) or Mixer (MAX2389). Differential input
impedance is 200Ω.
7 IF- Inverting Mixer’s IF Open-Collector Output
8 IF+ Noninverting Mixer’s IF Open-Collector Output
9V
CC Supply Voltage (+2.7V to +3.3V). Capacitively bypass to GND near the IC.
10 LNA_IN RF Input Port for LNA. Requires external matching.
11 GND Ground
12 BIAS LNA/Mixer Bias Pin. For nominal bias, connect 24kΩ ±1% resistor to GND.
IF Output Port
The mixer output appears on the differential IF+ and IF-
pins. These open-collector outputs require an external
inductor to VCC for DC biasing. This port typically
requires a matching network for coupling to an external
IF filter. Figures 1 and 2 show examples of differential
and single-ended IF port connections.
Applications Information
Layout
A properly designed PC board is essential to any
RF/microwave circuit. Keep RF signal lines as short as
possible to minimize losses and radiation. Always use
controlled impedance lines on all high-frequency inputs
and outputs and use low-inductance connections to
ground on all GND pins. At the mixer outputs, keep the
differential lines together and of the same length to
ensure signal balance.
For the best gain and noise performance, use high-
quality components for the LNA input matching circuit,
and solder the slug evenly to the board ground plane.
For the power supplies, a star topology works well to
isolate between different sections of the device. Each
VCC node has its own path to a central VCC. Place
decoupling capacitors that provide low impedance at
the RF frequency of interest close to all VCC connec-
tions. The central VCC should have a large decoupling
capacitor as well. (Use MAX2387/MAX2388/MAX2389
EV kit as an example.)
Chip Information
TRANSISTOR COUNT: 208
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
_______________________________________________________________________________________ 9
12
BIAS_SET 11
GND
10 LNA_IN
ZL
IF
SAW
9
VCC VCC
VCC
8IF+
7
IF-
45
LO+
VCO
10kΩ
24kΩ
10kΩ
10kΩ
20Ω
10nF
10µF
82pF
2.2nH
2.2nH
27nH
27nH
10nF
82pF
22pF
39pF
39pF
6800pF
0.8pF
RX
TX
6800pF
0.8pF
6
LO-
1
LNA_OUT
2
GAIN
3
MIX_IN
SHDN
BIAS
MAX2387
MAX2388
MAX2389
RX BPF
Figure 1. MAX2387/MAX2388/MAX2389 Differential IF Load; Single-Ended VCO
Typical Application Circuits
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
10 ______________________________________________________________________________________
3
12
BIAS 11
GND
10 LNA_IN
ZL
9
VCC VCC
VCC
8IF+
7IF-
45
LO+
10kΩ
10kΩ
IFOUT
6800pF
RX
TX
6
LO-
1
LNA_OUT
2
GAIN
MIX_IN
SHDN
BIAS
MAX2387
MAX2388
MAX2389
RX BPF
IF
SAW
VCO
2.2nH
0.8pF
0.8pF
20Ω
2.2nH 10nF
6800pF
10nF
82pF 82pF
10kΩ27nH
27nH
10nF
22pF
24kΩ
5.6nH
39pF
39pF
Figure 2. MAX2387/MAX2388/MAX2389 Differential IF Load; Differential VCO
MAX2387/MAX2388/MAX2389
W-CDMA LNA/Mixer ICs
S-PARAMETERS LNA (S11) LNA (S21) LNA (S12) LNA (S22)
FREQUENCY
(MHZ) MAGNITUDE PHASE MAGNITUDE PHASE MAGNITUDE PHASE MAGNITUDE PHASE
600 0.83287 -41.655 5.2176 146.82 0.020023 79.051 0.92461 -15.535
700 0.81889 -43.792 5.0791 145.33 0.021153 78.88 0.9171 -16.23
800 0.80364 -46.486 4.9464 143.26 0.022406 78.412 0.91098 -17.187
900 0.78522 -49.489 4.7767 141.09 0.023962 79.181 0.90108 -18.177
1000 0.76638 -53.118 4.6109 138.2 0.025913 78.989 0.8914 -19.536
1100 0.74542 -56.424 4.4363 135.68 0.027189 79.621 0.87913 -20.759
1200 0.72614 -59.477 4.2861 133.2 0.028484 79.666 0.86957 -22.045
1300 0.70338 -62.232 4.1209 130.93 0.030015 80.686 0.85623 -23.156
1400 0.68291 -64.933 4.0146 128.4 0.030979 81.41 0.84504 -24.46
1500 0.66114 -67.298 3.8951 126.82 0.032236 82.856 0.83313 -25.525
1600 0.63958 -69.782 3.7818 124.53 0.033056 83.763 0.82095 -26.882
1700 0.61641 -72.041 3.6761 122.88 0.03398 85.56 0.80875 -28.147
1800 0.59303 -74.571 3.5823 120.51 0.035009 86.377 0.79497 -29.825
1900 0.56989 -76.974 3.5198 118.87 0.036332 88.572 0.78338 -31.503
2000 0.54509 -79.651 3.4376 116.77 0.036887 89.686 0.76891 -33.44
2100 0.52084 -82.452 3.3691 115.17 0.038318 91.409 0.75735 -35.559
2200 0.49554 -85.891 3.2858 112.47 0.039355 93.409 0.74365 -38.175
2300 0.47232 -89.473 3.2544 110.28 0.040817 94.973 0.73415 -41.034
2400 0.44892 -93.529 3.195 108.05 0.042049 97.086 0.72262 -44.165
2500 0.42766 -98.164 3.1347 105.62 0.043438 98.58 0.71335 -47.828
2600 0.40833 -103.42 3.06 102.94 0.044844 100.14 0.70474 -51.733
2700 0.39421 -109.16 2.9818 100.13 0.046899 101.7 0.70067 -56.04
2800 0.38321 -115.32 2.9149 96.964 0.048389 103.31 0.69795 -60.397
2900 0.37608 -121.52 2.821 94.462 0.049426 104.62 0.69514 -64.899
3000 0.37573 -128.03 2.7086 91.479 0.05079 106.39 0.69504 -69.425
3100 0.38123 -134.23 2.5802 88.528 0.051657 108.22 0.69915 -73.798
3200 0.39208 -139.73 2.4696 85.584 0.053915 110.43 0.70504 -77.625
3300 0.40626 -144.57 2.3296 83.264 0.055483 113.29 0.71095 -81.166
3400 0.42512 -148.8 2.2157 80.95 0.05783 115.29 0.71819 -84.4
3500 0.44708 -152.13 2.0519 79.588 0.060614 118.09 0.72516 -87.06
3600 0.47302 -154.7 1.9382 77.337 0.065129 119.23 0.73416 -89.168
3700 0.49849 -156.57 1.8048 76.594 0.069104 120.99 0.73997 -90.676
Table 1. LNA Input/Output S-Parameters (VCC = +2.7V, High-Gain Mode)
Package Information
For the latest package outline information, go to
www.maxim-ic.com/packages.
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