19-0583; Rev 1; 2/12
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
Features
The MAX2014 complete multistage logarithmic amplifier is
designed to accurately convert radio-frequency (RF) signal 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 receivedsignal-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.
♦ Complete RF Detector/Controller
This logarithmic amplifier provides much wider measurement 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.
♦ Available in 8-Pin TDFN and 8-pin µMAX® Package
♦ 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
Applications
AGC Measurement and Control
RF Transmitter Power Measurement
RSSI Measurements
Cellular Base-Station, WLAN, Microwave Link,
Radar, and other Military Applications
Optical Networks
*See the Power-Supply Connections section.
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Functional Diagram
VCC
1, 4
POWER DETECTORS
INHI
Σ
2
50Ω
INLO
PWDN
Σ
7dB
Σ
7dB
8
7
7dB
3
OUT
SET
20kΩ
5
OFFSET AND COMMONMODE AMP
MAX2014
20kΩ
6
GND
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX2014
General Description
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
ABSOLUTE MAXIMUM RATINGS
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
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.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
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.
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)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY
Supply Voltage
VS
R4 = 75Ω ±1%, PWDN must be
connected to GND
4.75
5.25
R4 = 0Ω
2.7
3.6
TA = +25°C, VS = 5.25V,
R4 = 75Ω
17.3
V
mA
Supply Current
ICC
TA = +25°C
17.3
Supply Current Variation with Temp
ICC
TA = -40°C to +85°C
0.05
mA/°C
Shutdown Current
ICC
VPWDN = VCC
1
µA
20.5
CONTROLLER REFERENCE (SET)
SET Input Voltage Range
SET Input Impedance
0.5 to 1.8
V
40
kΩ
DETECTOR OUTPUT (OUT)
Source Current
Sink Current
2
4
mA
450
µA
Minimum Output Voltage
VOUT(MIN)
0.5
V
Maximum Output Voltage
VOUT(MAX)
1.8
V
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
(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
150
ns
-65 to +5
dBm
70
dB
Large-Signal Response Time
PIN = no signal to 0dBm,
±0.5dB settling accuracy
RSSI MODE—50MHz
RF Input Power Range
(Note 3)
±3dB Dynamic Range
TA = -40°C to +85°C (Note 4)
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
-65 to +5
dBm
70
dB
RSSI MODE—100MHz
RF Input Power Range
(Note 3)
±3dB Dynamic Range
TA = -40°C to +85°C (Note 4)
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
-65 to +5
dBm
70
dB
-30
dBm
±0.0083
dB/°C
RSSI MODE—900MHz
RF Input Power Range
(Note 3)
±3dB Dynamic Range
TA = -40°C to +85°C (Note 4)
Range Center
Temp Sensitivity when TA > +25°C
TA = +25°C to +85°C,
PIN = -25dBm
3
MAX2014
AC ELECTRICAL CHARACTERISTICS
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
Temp Sensitivity when TA < +25°C
TA = -40°C to +25°C,
PIN = -25dBm
Slope
(Note 5)
Typical Slope Variation
TA = -40°C to +85°C
Intercept
Typical Intercept Variation
MIN
TYP
MAX
UNITS
-0.0154
dB/°C
18.1
mV/dB
-4
µV/°C
(Note 6)
-97
dBm
TA = -40°C to +85°C
0.02
dBm/°C
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.
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.)
1.6
1.2
TA = +85°C
VCC = 3.6V
1
ERROR (dB)
ERROR (dB)
1.4
TA = -20°C
0
0.6
0.4
-2
-50
-40
-30
INPUT POWER (dBm)
-20
-10
0
VCC = 3.0V
-3
-3
-60
VCC = 2.7V
VCC = 3.3V
TA = -40°C
-2
-70
0
-1
-1
TA = -40°C
-80
fIN = 50MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
2
TA = +85°C
1
0.8
4
fIN = 50MHz
NORMALIZED TO DATA AT +25°C
2
3
MAX2014 toc02
MAX2014 toc01
fIN = 50MHz
1.8
1.0
OUTPUT VOLTAGE ERROR vs. INPUT POWER
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
MAX2014 toc03
OUTPUT VOLTAGE vs. INPUT POWER
2.0
OUTPUT VOLTAGE (V)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
fIN = 100MHz
1.8
3
MAX2014 toc05
fIN = 100MHz
NORMALIZED TO DATA AT +25°C
2
-1
1.4
TA = +85°C
1.2
1.0
-1
TA = -40°C
-3
-3
0.4
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
fIN = 100MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
2
-80
0
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
OUTPUT VOLTAGE ERROR vs. INPUT POWER
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
3
fIN = 100MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
2
VCC = 3.6V
1
1
ERROR (dB)
-70
MAX2014 toc07
-80
TA = -40°C
-2
0.6
VCC = 3.6V
TA = -20°C
0
0.8
VCC = 3.3V
-2
TA = +85°C
1
ERROR (dB)
VCC = 3.0V
0
ERROR (dB)
ERROR (dB)
VCC = 2.7V
OUTPUT VOLTAGE (V)
1.6
1
MAX2014 toc08
MAX2014 toc04
fIN = 50MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
2
OUTPUT VOLTAGE ERROR vs. INPUT POWER
OUTPUT VOLTAGE vs. INPUT POWER
2.0
MAX2014 toc06
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
0
VCC = 2.7V
VCC = 3.0V
-1
VCC = 2.7V, 3.0V
0
-1
VCC = 3.3V
-2
-2
VCC = 3.3V
VCC = 3.6V
-3
-3
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
5
MAX2014
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.)
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
fIN = 450MHz
fIN = 450MHz
NORMALIZED TO DATA AT +25°C
2
1.6
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
MAX2014 toc10
MAX2014 toc09
fIN = 450MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
2
TA = +85°C
VCC = 3.6V
1
ERROR (dB)
1.4
1.2
1.0
TA = +85°C
1
ERROR (dB)
1.8
3
TA = -20°C
0
-1
TA = -40°C
0
VCC = 2.7V
-1
VCC = 3.0V
0.8
-2
0.4
-3
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-3
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
2
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
2.0
MAX2014 toc12
fIN = 450MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
-80
OUTPUT VOLTAGE vs. INPUT POWER
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
fIN = 900MHz
1.8
OUTPUT VOLTAGE (V)
1.6
VCC = 2.7V
0
-1
TA = +85°C
0.8
0.4
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
-80
0
2
ERROR (dB)
TA = -20°C
0
0
VCC = 2.7V
-1
-1
-10
VCC = 3.6V
1
1
VCC = 3.0V
VCC = 3.3V
-2
TA = -40°C
-2
-50 -40 -30 -20
INPUT POWER (dBm)
fIN = 900MHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
2
TA = +85°C
0
-60
3
MAX2014 toc14
fIN = 900MHz
NORMALIZED TO DATA AT +25°C
-70
OUTPUT VOLTAGE ERROR vs. INPUT POWER
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
ERROR (dB)
1.0
0.6
VCC = 3.0V
-3
-3
-3
-80
6
1.2
TA = -40°C
VCC = 3.3V
VCC = 3.6V
1.4
MAX2014 toc15
ERROR (dB)
1
-2
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
VCC = 3.3V
-2
TA = -40°C
MAX2014 toc13
0.6
MAX2014 toc11
OUTPUT VOLTAGE vs. INPUT POWER
2.0
OUTPUT VOLTAGE (V)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
-10
0
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-10
0
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
OUTPUT VOLTAGE ERROR vs. INPUT POWER
fIN = 1GHz
1.8
3
MAX2014 toc17
MAX2014 toc16
fIN = 900MHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
2
OUTPUT VOLTAGE vs. INPUT POWER
2.0
MAX2014 toc18
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
fIN = 1GHz
NORMALIZED TO DATA AT +25°C
2
1.2
TA = +85°C
1.0
-1
TA = -40°C
VCC = 3.3V
-2
0.6
VCC = 3.0V
-3
TA = -40°C
0.4
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-3
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
OUTPUT VOLTAGE ERROR vs. INPUT POWER
fIN = 1GHz, TA = +85°C
NORMALIZED TO DATA AT +25°C
2
0
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
OUTPUT VOLTAGE ERROR vs. INPUT POWER
3
MAX2014 toc19
3
fIN = 1GHz, TA = -40°C
NORMALIZED TO DATA AT +25°C
2
VCC = 3.6V
1
ERROR (dB)
1
0
VCC = 2.7V
-1
VCC = 2.7V
0
-1
VCC = 3.3V
-2
-2
-3
VCC = 3.3V
VCC = 3.6V
-3
-80
-70
-60
-50 -40 -30 -20
INPUT POWER (dBm)
-10
0
-80
OUTPUT VOLTAGE vs. FREQUENCY
2.0
PIN = +5dBm
1.8
PIN = -5dBm
1.6
PIN = -45dBm
PIN = -30dBm
1.0
PIN = -45dBm
0.8
0.6
PIN = -65dBm
0.6
0.4
TA = -40°C
1.2
PIN = -55dBm
400
600
800
FREQUENCY INPUT (MHz)
1000
TA = +85°C
PIN = -60dBm
TA = +25°C
0.4
200
0
PIN = -10dBm
1.4
0.8
0
-10
TA = +25°C, +85°C
1.8
OUTPUT VOLTAGE (V)
PIN = -35dBm
1.0
-50 -40 -30 -20
INPUT POWER (dBm)
2.0
1.6
PIN = -25dBm
1.2
-60
OUTPUT VOLTAGE vs. FREQUENCY
PIN = -15dBm
1.4
-70
VCC = 3.0V
MAX2014 toc22
VCC = 3.0V
MAX2014 toc21
-70
ERROR (dB)
-80
TA = -20°C
0.8
-2
VCC = 3.6V
0
MAX2014 toc20
-1
OUTPUT VOLTAGE (V)
ERROR (dB)
VCC = 2.7V
0
TA = +85°C
1
1.4
ERROR (dB)
OUTPUT VOLTAGE (V)
1.6
1
0
200
TA = -40°C
400
600
800
FREQUENCY INPUT (MHz)
1000
7
MAX2014
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.)
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 vs. FREQUENCY
OUTPUT VOLTAGE (V)
1.6
PIN = -10dBm
1.4
VCC = 2.7V
1.2
PIN = -30dBm
1.0
PIN = -45dBm
0.8
PIN = -60dBm
0.6
VCC = 2.7V, 3.3V, 3.6V
0.4
fIN = 100MHz
2.0
MAX2014 toc24
2.5
RF INPUT VOLTAGE, OUTPUT VOLTAGE (V)
VCC = 3.6V
1.8
RF PULSE RESPONSE
MAX2014 toc23
2.0
VOUT
1.5
RFIN
(AC-COUPLED)
1.0
0.5
0
-0.5
-1.0
0
200
400
600
800
FREQUENCY INPUT (MHz)
1000
TIME (50ns/div)
S11 MAGNITUDE
S11 MAGNITUDE
-12.5
-12.5
MAGNITUDE (dB)
-15.0
VCC = 2.7V, 3.0V, 3.3V, 3.6V
-17.5
-20.0
-20.0
-25.0
-25.0
400
600
FREQUENCY (MHz)
800
1000
TA = -40°C
-17.5
-22.5
200
TA = -20°C
-15.0
-22.5
0
MAX2014 toc26
-10.0
MAX2014 toc25
-10.0
MAGNITUDE (dB)
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
TA = +25°C
TA = +85°C
0
200
400
600
FREQUENCY (MHz)
800
1000
Pin Description
PIN
1, 4
2, 3
8
NAME
VCC
DESCRIPTION
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).
INHI, INLO Differential RF Inputs
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.
5
PWDN
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.
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
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 logarithmic amplifiers.
The MAX2014 provides for improved performance with
a high 75dB dynamic range at 100MHz, and exceptional 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 ACcoupled using 680pF capacitors as shown in Figures 1
and 2. An internal 50Ω resistor between INHI and INLO
provides a good 50MHz to 1000MHz match.
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 feedback 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 20kΩ feedback resistors.
VS
R4
1
C6
DETECTORS
C1
RFIN
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 capacitor (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 = V CC ). In power-down
mode, the supply current is reduced to a typical value
of 1µA. For normal operation, drive PWDN with a logiclow. It is recommended when using power-down that
an RF signal not be applied before the power-down
signal is low.
2
INHI
OUT 8
20kΩ
OUT
SET 7
R1
C2
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 20kΩ resistors connected to ground.
The center node of the resistors is fed to the negative
input of the internal output op amp.
VCC
C5
3
4
C4
20kΩ
INLO
VCC
GND
MAX2014
PWDN
6
5
C3
Figure 1. Detector-Mode (RSSI) Typical Application Circuit
Table 1. Suggested Components of
Typical Application Circuits
DESIGNATION
VALUE
TYPE
C1, C2
680pF
C3, C5
100pF
0603 ceramic capacitors
C4, C6
0.1µF
0603 ceramic capacitors
R1*
0Ω
0603 resistor
R4**
0Ω
0603 resistor
0603 ceramic capacitors
*RSSI mode only.
**VS = 2.7V to 3.6V.
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
9
MAX2014
Detailed Description
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
variable-gain PA. As shown in the figure, the MAX2014
monitors the output of the PA through a directional coupler. An internal integrator (Figure 2) compares the
detected signal with a reference voltage determined by
VSET. The integrator, acting like a comparator, increases or decreases the voltage at OUT, according to how
closely the detected signal level matches the VSET reference. 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 number 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.
Pin Configurations
TOP VIEW
OUT SET GND PWDN
VS
8
7
6
5
R4
1
MAX2014
VCC
EP
C5
C6
DETECTORS
C1
RFIN
C2
2
3
4
C4
OUT 8
INHI
INLO
VCC
20kΩ
VOUT
SET 7
TDFN
20kΩ
GND
MAX2014
PWDN
6
TOP VIEW
5
Figure 2. Controller-Mode Typical Application Circuit
+
8
OUT
7
SET
3
6
GND
4
5
PWDN
VCC
1
INHI
2
INLO
VCC
MAX2015
µMAX
POWER AMPLIFIER
TRANSMITTER
COUPLER
GAIN-CONTROL INPUT
OUT
LOGARITHMIC
DETECTOR
IN
SET
20kΩ
20kΩ
MAX2014
Figure 3. System Diagram for Automatic Gain-Control Loop
10
1
3
4
2
VCC INHI INLO VCC
VSET
C3
SET-POINT
DAC
+
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
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
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX2014ETA+
-40°C to +85°C
8 TDFN-EP*
MAX2014ETA+T
-40°C to +85°C
8 TDFN-EP*
MAX2014EUA+
-40°C to +85°C
8 µMAX
MAX2014EUA+T
-40°C to +85°C
8 µMAX
Chip Information
PROCESS: BiCMOS
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
11
MAX2014
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 pertains to the package regardless of RoHS status.
MAX2014
50MHz to 1000MHz, 75dB Logarithmic
Detector/Controller
Revision History
REVISION
NUMBER
REVISION
DATE
0
6/06
Initial release
1
2/12
Added µMAX package and updated style
DESCRIPTION
PAGES
CHANGED
—
1–7, 9, 10
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.
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