General Description
The MAX2014 complete multistage logarithmic amplifier is
designed to accurately convert radio-frequency (RF) sig-
nal power in the 50MHz to 1000MHz frequency range to
an equivalent DC voltage. The outstanding dynamic range
and precision over temperature of this log amplifier make it
particularly useful for a variety of base-station and other
wireless applications, including automatic gain control
(AGC), transmitter power measurements, and received-
signal-strength indication (RSSI) for terminal devices.
The MAX2014 can also be operated in a controller
mode where it measures, compares, and controls the
output power of a variable-gain amplifier as part of a
fully integrated AGC loop.
This logarithmic amplifier provides much wider mea-
surement range and superior accuracy compared to
controllers based on diode detectors, while achieving
excellent temperature stability over the full -40°C to
+85°C operating range.
Applications
AGC Measurement and Control
RF Transmitter Power Measurement
RSSI Measurements
Cellular Base-Station, WLAN, Microwave Link,
Radar, and other Military Applications
Optical Networks
Features
♦Complete RF Detector/Controller
♦50MHz to 1000MHz Frequency Range
♦Exceptional Accuracy Over Temperature
♦High Dynamic Range
♦2.7V to 5.25V Supply Voltage Range*
♦Scaling Stable Over Supply and Temperature
Variations
♦Controller Mode with Error Output
♦Shutdown Mode with Typically 1µA of Supply
Current
♦Available in 8-Pin TDFN and 8-pin µMAX®Package
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
________________________________________________________________
Maxim Integrated Products
1
MAX2014
7dB
Σ
50Ω
20kΩ
SET
OUT
8
7
2
INHI
INLO 3
6
1, 4
PWDN 5
20kΩ
Σ
7dB
Σ
7dB
VCC
GND
POWER DETECTORS
OFFSET AND COMMON-
MODE AMP
Functional Diagram
19-0583; Rev 1; 2/12
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin Configuration appears at end of data sheet.
*
See the Power-Supply Connections section.
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
2
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(
Typical Application Circuit
(Figure 1), VS= +3.3V, fRF = 50MHz to 1000MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, TA= -40°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C, unless otherwise noted.) (Note 2)
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 (Pins 1, 4) to GND........................................-0.3V to +5.25V
SET, PWDN to GND....................................-0.3V to (VCC + 0.3V)
Input Power Differential INHI, INLO................................+23dBm
Input Power Single Ended (INHI or INLO grounded).....+19dBm
Continuous Power Dissipation (TA= +70°C)
TDFN (derate 18.5mW/°C above +70°C)....................1480mW
µMAX (derate 4.5mW/°C above +70°C) .......................362mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
R4 = 75Ω ±1%, PWDN must be
connected to GND 4.75 5.25
Supply Voltage VS
R4 = 0Ω2.7 3.6
V
TA = +25°C, VS = 5.25V,
R4 = 75Ω17.3
Supply Current ICC
TA = +25°C 17.3 20.5
mA
Supply Current Variation with Temp ICC TA = -40°C to +85°C 0.05 mA/°C
Shutdown Current ICC VPWDN = VCC 1µA
CONTROLLER REFERENCE (SET)
SET Input Voltage Range 0.5 to 1.8 V
SET Input Impedance 40 kΩ
DETECTOR OUTPUT (OUT)
Source Current 4mA
Sink Current 450 µA
Minimum Output Voltage VOUT
(
MIN
)
0.5 V
Maximum Output Voltage VOUT
(
MAX
)
1.8 V
TDFN:
Junction-to-Ambient Thermal Resistance (θJA) ............54°C/W
Junction-to-Case Thermal Resistance (θJC) ...................8°C/W
µMAX:
Junction-to-Ambient Thermal Resistance (θJA) ..........221°C/W
Junction-to-Case Thermal Resistance (θJC) .................42°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7. For detailed
information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
3
AC ELECTRICAL CHARACTERISTICS
(
Typical Application Circuit
(Figure 1), VS= +3.3V, fRF = 50MHz to 1000MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, TA= -40°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RF Input Frequency Range fRF 50 to 1000 MHz
Return Loss S11 -15 dB
Large-Signal Response Time PIN = no signal to 0dBm,
±0.5dB settling accuracy 150 ns
RSSI MODE—50MHz
RF Input Power Range (Note 3) -65 to +5 dBm
±3dB Dynamic Range TA = -40°C to +85°C (Note 4) 70 dB
Range Center -30 dBm
Temp Sensitivity when TA > +25°C TA = +25°C to +85°C,
PIN = -25dBm +0.0083 dB/°C
Temp Sensitivity when TA < +25°C TA = -40°C to +25°C,
PIN = -25dBm -0.0154 dB/°C
Slope (Note 5) 19 mV/dB
Typical Slope Variation TA = -40°C to +85°C -4 µV/°C
Intercept (Note 6) -100 dBm
Typical Intercept Variation TA = -40°C to +85°C 0.03 dBm/°C
RSSI MODE—100MHz
RF Input Power Range (Note 3) -65 to +5 dBm
±3dB Dynamic Range TA = -40°C to +85°C (Note 4) 70 dB
Range Center -30 dBm
Temp Sensitivity when TA > +25°C TA = +25°C to +85°C,
PIN = -25dBm +0.0083 dB/°C
Temp Sensitivity when TA < +25°C TA = -40°C to +25°C,
PIN = -25dBm -0.0154 dB/°C
Slope (Note 5) 19 mV/dB
Typical Slope Variation TA = -40°C to +85°C -4 µV/°C
Intercept (Note 6) -100 dBm
Typical Intercept Variation TA = -40°C to +85°C 0.03 dBm/°C
RSSI MODE—900MHz
RF Input Power Range (Note 3) -65 to +5 dBm
±3dB Dynamic Range TA = -40°C to +85°C (Note 4) 70 dB
Range Center -30 dBm
Temp Sensitivity when TA > +25°C TA = +25°C to +85°C,
PIN = -25dBm ±0.0083 dB/°C
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
4
Note 2: The MAX2014 is guaranteed by design for TA= -40°C to +85°C, as specified.
Note 3: Typical minimum and maximum range of the detector at the stated frequency.
Note 4: Dynamic range refers to the range over which the error remains within the stated bounds. The error is calculated at TA= -40°C
and +85°C, relative to the curve at TA= +25°C.
Note 5: The slope is the variation of the output voltage per change in input power. It is calculated by fitting a root-mean-square
(RMS) straight line to the data indicated by RF input power range.
Note 6: The intercept is an extrapolated value that corresponds to the output power for which the output voltage is zero.
It is calculated by fitting an RMS straight line to the data.
AC ELECTRICAL CHARACTERISTICS (continued)
(
Typical Application Circuit
(Figure 1), VS= +3.3V, fRF = 50MHz to 1000MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, TA= -40°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C, unless otherwise noted.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temp Sensitivity when TA < +25°C TA = -40°C to +25°C,
PIN = -25dBm -0.0154 dB/°C
Slope (Note 5) 18.1 mV/dB
Typical Slope Variation TA = -40°C to +85°C -4 µV/°C
Intercept (Note 6) -97 dBm
Typical Intercept Variation TA = -40°C to +85°C 0.02 dBm/°C
OUTPUT VOLTAGE vs. INPUT POWER
MAX2014 toc01
INPUT POWER (dBm)
OUTPUT VOLTAGE (V)
-10-20-70 -60 -50 -40 -30
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.4
-80 0
fIN = 50MHz
TA = +85°C
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc02
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
fIN = 50MHz
NORMALIZED TO DATA AT +25°C
TA = +85°C
TA = -20°C
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc03
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 50MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V
VCC = 3.0V
VCC = 3.6V
Typical Operating Characteristics
(
Typical Application Circuit
(Figure 1), VS= VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, VPWDN = 0V,
TA= +25°C, unless otherwise noted.)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
5
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc04
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 2.7V
fIN = 50MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
VCC = 3.0V
VCC = 3.3V
VCC = 3.6V
OUTPUT VOLTAGE vs. INPUT POWER
INPUT POWER (dBm)
OUTPUT VOLTAGE (V)
MAX2014 toc05
-80 -70 -60 -50 -40 -30 -20 -10 0
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
TA = +85°C
fIN = 100MHz
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc06
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
TA = +85°C
fIN = 100MHz
NORMALIZED TO DATA AT +25°C
TA = -20°C
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc07
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 100MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V
VCC = 3.0V
VCC = 3.6V
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc08
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3fIN = 100MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V, 3.0V
VCC = 3.3V
VCC = 3.6V
Typical Operating Characteristics (continued)
(
Typical Application Circuit
(Figure 1), VS= VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, VPWDN = 0V,
TA= +25°C, unless otherwise noted.)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
6
Typical Operating Characteristics (continued)
(
Typical Application Circuit
(Figure 1), VS= VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, VPWDN = 0V,
TA= +25°C, unless otherwise noted.)
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc10
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
TA = +85°C
fIN = 450MHz
NORMALIZED TO DATA AT +25°C
TA = -20°C
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc11
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 450MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V VCC = 3.0V
VCC = 3.6V
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc12
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 2.7V
fIN = 450MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
VCC = 3.0V
VCC = 3.3V
VCC = 3.6V
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc14
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
TA = +85°C
fIN = 900MHz
NORMALIZED TO DATA AT +25°C
TA = -20°C
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc15
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 900MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V
VCC = 3.0V
VCC = 3.6V
OUTPUT VOLTAGE vs. INPUT POWER
INPUT POWER (dBm)
OUTPUT VOLTAGE (V)
MAX2014 toc09
-80 -70 -60 -50 -40 -30 -20 -10 0
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
TA = +85°C
fIN = 450MHz
TA = -40°C
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
7
Typical Operating Characteristics (continued)
(
Typical Application Circuit
(Figure 1), VS= VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, VPWDN = 0V,
TA= +25°C, unless otherwise noted.)
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc18
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
TA = +85°C
fIN = 1GHz
NORMALIZED TO DATA AT +25°C
TA = -20°C
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc16
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 900MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V
VCC = 3.0V
VCC = 3.6V
OUTPUT VOLTAGE vs. INPUT POWER
INPUT POWER (dBm)
OUTPUT VOLTAGE (V)
MAX2014 toc17
-80 -70 -60 -50 -40 -30 -20 -10 0
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
TA = +85°C
fIN = 1GHz
TA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc19
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 1GHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V
VCC = 3.0V
VCC = 3.6V
OUTPUT VOLTAGE vs. FREQUENCY
FREQUENCY INPUT (MHz)
OUTPUT VOLTAGE (V)
MAX2014 toc22
0 200 400 600 800 1000
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
PIN = -60dBm
PIN = -10dBm
PIN = -30dBm
PIN = -45dBm
TA = +25°C, +85°C
TA = -40°C
TA = +85°C
TA = +25°CTA = -40°C
OUTPUT VOLTAGE ERROR vs. INPUT POWER
INPUT POWER (dBm)
ERROR (dB)
MAX2014 toc20
-80 -70 -60 -50 -40 -30 -20 -10 0
-3
-2
-1
0
1
2
3
VCC = 3.3V
fIN = 1GHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
VCC = 2.7V
VCC = 3.0V
VCC = 3.6V
OUTPUT VOLTAGE vs. FREQUENCY
FREQUENCY INPUT (MHz)
OUTPUT VOLTAGE (V)
MAX2014 toc21
0 200 400 600 800 1000
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
PIN = +5dBm
PIN = -5dBm
PIN = -15dBm
PIN = -25dBm
PIN = -35dBm
PIN = -45dBm
PIN = -55dBm
PIN = -65dBm
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
8
Pin Description
PIN NAME DESCRIPTION
1, 4 VCC Supply Voltage. Bypass with capacitors as specified in the typical application circuits. Place capacitors
as close to the pin as possible (see the Power-Supply Connections section).
2, 3
INHI, INLO
Differential RF Inputs
5 PWDN Power-Down Input. Drive PWDN with a logic-high to power down the IC. PWDN must be connected to
GND for VS between 4.75V and 5.25V with R4 = 75Ω.
6 GND Ground. Connect to the printed circuit (PC) board ground plane.
7 SET Set-Point Input. To operate in detector mode, connect SET to OUT. To operate in controller mode,
connect a precision voltage source to control the power level of a power amplifier.
8 OUT Detector Output. In detector mode, this output provides a voltage proportional to the log of the input
power. In controller mode, this output is connected to a power-control input on a power amplifier (PA).
—EP
Exposed Pad (TDFN Package Only). Connect EP to GND using multiple vias, or the EP can also be left
unconnected.
OUTPUT VOLTAGE vs. FREQUENCY
FREQUENCY INPUT (MHz)
OUTPUT VOLTAGE (V)
MAX2014 toc23
0 200 400 600 800 1000
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
PIN = -60dBm
PIN = -30dBm
PIN = -45dBm
PIN = -10dBm
VCC = 2.7V, 3.3V, 3.6V
VCC = 2.7V
VCC = 3.6V
RF PULSE RESPONSE
TIME (50ns/div)
RF INPUT VOLTAGE, OUTPUT VOLTAGE (V)
MAX2014 toc24
-1.0
-0.5
0
0.5
1.0
1.5
2.0
2.5
VOUT
fIN = 100MHz
RFIN
(AC-COUPLED)
S11 MAGNITUDE
FREQUENCY (MHz)
MAGNITUDE (dB)
MAX2014 toc25
0 200 400 600 800 1000
-25.0
-22.5
-20.0
-17.5
-15.0
-12.5
-10.0
VCC = 2.7V, 3.0V, 3.3V, 3.6V
S11 MAGNITUDE
FREQUENCY (MHz)
MAGNITUDE (dB)
MAX2014 toc26
0 200 400 600 800 1000
-25.0
-22.5
-20.0
-17.5
-15.0
-12.5
-10.0
TA = -40°C
TA = +25°C
TA = +85°C
TA = -20°C
Typical Operating Characteristics (continued)
(
Typical Application Circuit
(Figure 1), VS= VCC = 3.3V, PIN = -10dBm, fIN = 100MHz, R1 = 0Ω, R4 = 0Ω, RL= 10kΩ, VPWDN = 0V,
TA= +25°C, unless otherwise noted.)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
9
Detailed Description
The MAX2014 is a successive detection logarithmic
amplifier designed for use in RF power measurement
and AGC applications with a 50MHz to 1000MHz
frequency range from a single 2.7V to 3.6V power
supply. It is pin compatible with other leading logarith-
mic amplifiers.
The MAX2014 provides for improved performance with
a high 75dB dynamic range at 100MHz, and exception-
al accuracy over the extended temperature range and
supply voltage range.
RF Input
The MAX2014 differential RF input (INHI, INLO) allows
for broadband signals between 50MHz and 1000MHz.
For single-ended signals, AC-couple INLO to ground.
The RF inputs are internally biased and need to be AC-
coupled using 680pF capacitors as shown in Figures 1
and 2. An internal 50Ωresistor between INHI and INLO
provides a good 50MHz to 1000MHz match.
SET Input
The SET input is used for loop control when in controller
mode or to set the slope of the output signal (mV/dB)
when in detector mode. The internal input structure of
SET is two series 20kΩresistors connected to ground.
The center node of the resistors is fed to the negative
input of the internal output op amp.
Power-Supply Connections
The MAX2014 requires power-supply bypass capacitors
connected close to each VCC pin. At each VCC pin,
connect a 0.1µF capacitor (C4, C6) and a 100pF capac-
itor (C3, C5), with the 100pF capacitor being closest to
the pin.
For power-supply voltages (VS) between 2.7V and 3.6V,
set R4 = 0Ω(see the typical application circuits, Figures
1 and 2 ).
For power-supply voltages (VS) between 4.75V and
5.25V, set R4 = 75Ω±1% (100ppm/°C max) and PWDN
must be connected to GND.
Power-Down Mode
The MAX2014 can be powered down by driving PWDN
with logic-high (logic-high = VCC). In power-down
mode, the supply current is reduced to a typical value
of 1µA. For normal operation, drive PWDN with a logic-
low. It is recommended when using power-down that
an RF signal not be applied before the power-down
signal is low.
Applications Information
Detector (RSSI) Mode
In detector mode, the MAX2014 acts like an RSSI,
which provides an output voltage proportional to the
input power. This is accomplished by providing a feed-
back path from OUT to SET (R1 = 0Ω; see Figure 1).
By connecting SET directly to OUT, the op amp gain is
set to 2V/V due to two internal 20kΩfeedback resistors.
This provides a detector slope of approximately
18mV/dB with a 0.5V to 1.8V output range.
Controller Mode
The MAX2014 can also be used as a detector/controller
within an AGC loop. Figure 3 depicts one scenario
where the MAX2014 is employed as the controller for a
MAX2014
C6
C1
C5
1
2
OUT
SET
C4 C3
4
VCC
VCC
INLO
OUT
20kΩ
20kΩ
INHI 7
8
RFIN
C2 3
DETECTORS
R1
GND 6
PWDN 5
R4
VS
Figure 1. Detector-Mode (RSSI) Typical Application Circuit
Table 1. Suggested Components of
Typical Application Circuits
DESIGNATION VALUE TYPE
C1, C2 680pF 0603 ceramic capacitors
C3, C5 100pF 0603 ceramic capacitors
C4, C6 0.1µF 0603 ceramic capacitors
R1* 0Ω0603 resistor
R4** 0Ω0603 resistor
*
RSSI mode only.
**
VS= 2.7V to 3.6V.
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
10
variable-gain PA. As shown in the figure, the MAX2014
monitors the output of the PA through a directional cou-
pler. An internal integrator (Figure 2) compares the
detected signal with a reference voltage determined by
VSET. The integrator, acting like a comparator, increas-
es or decreases the voltage at OUT, according to how
closely the detected signal level matches the VSET ref-
erence. The MAX2014 adjusts the power of the PA to a
level determined by the voltage applied to SET. With R1 =
0Ω, the controller mode slope is approximately
19mV/dB (RF = 100MHz).
Layout Considerations
As with any RF circuit, the layout of the MAX2014 circuit
affects the device’s performance. Use an abundant num-
ber of ground vias to minimize RF coupling. Place the
input capacitors (C1, C2) and the bypass capacitors
(C3–C6) as close to the IC as possible. Connect the
bypass capacitors to the ground plane with multiple vias.
MAX2014
C6
R4
C1
C5
1
2
OUT
SET
VS
C4 C3
4
VCC
VCC
INLO
VOUT
VSET
20kΩ
20kΩ
INHI 7
8
RFIN
C2 3
DETECTORS
GND 6
PWDN 5
Figure 2. Controller-Mode Typical Application Circuit
MAX2014
OUT
SET
20kΩ
20kΩ
IN
COUPLER
LOGARITHMIC
DETECTOR
TRANSMITTER
POWER AMPLIFIER
GAIN-CONTROL INPUT
SET-POINT
DAC
Figure 3. System Diagram for Automatic Gain-Control Loop
1
+
34
865
EP
OUT GND PWDN
2
7
SET
INLO VCC
VCC INHI
TDFN
TOP VIEW
MAX2014
Pin Configurations
+
VCC
TOP VIEW
µMAX
27 SET
INHI
18 OUT
GND
INLO 3 6
PWDN
VCC 45
MAX2015
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
11
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
8 TDFN-EP T833+2 21-0137 90-0059
8 µMAX U8+1 21-0036 90-0092
Chip Information
PROCESS: BiCMOS
Ordering Information
PART TEMP RA NG E PIN-PA CK A GE
MAX2014ETA+ -40°C to +85°C 8 TDFN-EP*
MAX2014ETA+T -40°C to +85°C 8 TDFN-EP*
MAX2014E UA+ -40°C to +85°C 8 µM AX
MAX2014E UA+T -40°C to +85°C 8 µMAX
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
T = Tape and reel.
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
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. The parametric values (min and max limits) shown in
the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
12
____________________________Maxim Integrated Products, 160 Rio Robles, San Jose, CA 95134 408-601-1000
© 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 6/06 Initial release —
1 2/12 Added µMAX package and updated style 1–7, 9, 10
Revision History