19-2998; Rev 2; 2/07
IT
TION K
VALUA
E
BLE
AVAILA
0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
Features
♦
Complete RF Detector/Controller
♦
0.1GHz to 3GHz 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
µMAX
®
and TDFN Packages
*See
Power-Supply Connections section.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
General Description
The MAX2015 complete multistage logarithmic amplifier
is designed to accurately convert radio-frequency (RF)
signal power in the 0.1GHz to 3GHz frequency range to
an equivalent DC voltage. The outstanding dynamic
range and precision over temperature of this log ampli-
fier make it particularly useful for a variety of base sta-
tion and other wireless applications, including
automatic gain control (AGC), transmitter power mea-
surements, and received signal strength indication
(RSSI) for terminal devices.
The MAX2015 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.
MAX2015
Ordering Information
PART
MAX2015EUA
MAX2015EUA-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 µMAX
8 µMAX
PKG
CODE
U8-1
U8-1
Applications
AGC Measurement and Control
RF Transmitter Power Measurement
RSSI Measurements
Cellular Base Station, WLAN, Microwave Link,
Radar, and other Military Applications
T = Tape-and-reel.
+Denotes
lead-free and RoHS compliance.
*EP
= Exposed paddle.
Ordering Information continued at end of data sheet.
Functional Diagram
V
CC
1, 4
POWER DETECTORS
2
50Ω
INLO
3
INHI
Σ
7dB
Σ
7dB
Σ
7dB
20kΩ
8
7
OUT
SET
PWDN
5
OFFSET AND COMMON-
MODE AMP
20kΩ
MAX2015
6
GND
Pin Configuration appears at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
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.
0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
MAX2015
ABSOLUTE MAXIMUM RATINGS
V
CC
(Pins, 1, 4) to GND.......................................-0.3V to +5.25V
SET, PWDN to GND....................................-0.3V to (V
CC
+ 0.3V)
Input Power Differential INHI, INLO................................+23dBm
Input Power Single Ended (INHI or INLO grounded).....+19dBm
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW
8-Pin TDFN (derate 18.5mW/°C above +70°C) .........1480mW
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
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.
DC ELECTRICAL CHARACTERISTICS
(MAX2015 typical application circuit (Figure 1), V
S
= +3.3V, f
RF
= 100MHz to 3000MHz, R1 = 0Ω, R4 = 0Ω, R
L
= 10kΩ, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
POWER SUPPLY
Supply Voltage
V
S
R4 = 75Ω ±1%, PWDN must be
connected to GND
R4 = 0Ω
Supply Current
Supply Current Variation with Temp
Shutdown Current
CONTROLLER REFERENCE (SET)
SET Input Voltage Range
SET Input Impedance
DETECTOR OUTPUT (OUT)
Source Current
Sink Current
Minimum Output Voltage
Maximum Output Voltage
V
OUT(MIN)
V
OUT(MAX)
4
450
0.5
1.8
mA
µA
V
V
0.5 to 1.8
40
V
kΩ
I
CC
I
CC
I
CC
T
A
= +25°C, V
S
= 5.25V,
R4 = 75Ω
T
A
= +25°C
T
A
= -40°C to +85°C
V
PWDN
= V
CC
4.75
2.7
17.3
17.3
0.05
1
20.5
mA/°C
µA
5.25
3.6
mA
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
AC ELECTRICAL CHARACTERISTICS
(MAX2015 typical application circuit (Figure 1), V
S
= +3.3V, f
RF
= 100MHz to 3000MHz, R1 = 0Ω, R4 = 0Ω, R
L
= 10kΩ, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
RF Input Frequency Range
Return Loss
Large-Signal Response Time
RSSI MODE—0.1GHz
RF Input Power Range
±3dB Dynamic Range
Range Center
Temp Sensitivity when T
A
> +25°C
Temp Sensitivity when T
A
< +25°C
Slope
Typical Slope Variation
Intercept
Typical Intercept Variation
RSSI MODE—0.9GHz
RF Input Power Range
±3dB Dynamic Range
Range Center
Temp Sensitivity when T
A
> +25°C
Temp Sensitivity when T
A
< +25°C
Slope
Typical Slope Variation
Intercept
Typical Intercept Variation
RSSI MODE—1.9GHz
RF Input Power Range
±3dB Dynamic Range
Range Center
Temp Sensitivity when T
A
> +25°C
Temp Sensitivity when T
A
< +25°C
Slope
Typical Slope Variation
T
A
= +25°C to +85°C,
P
IN
= -25dBm
T
A
= -40°C to +25°C,
P
IN
= -25dBm
(Note 4)
T
A
= -40°C to +85°C
(Note 2)
T
A
= -40°C to +85°C (Note 3)
-55 to +5
60
-25
±0.0033
-0.0138
18
-4.8
dBm
dB
dBm
dB/°C
dB/°C
mV/dB
µV/°C
T
A
= +25°C to +85°C,
P
IN
= -25dBm
T
A
= -40°C to +25°C,
P
IN
= -25dBm
(Note 4)
T
A
= -40°C to +85°C
(Note 5)
T
A
= -40°C to +85°C
(Note 2)
T
A
= -40°C to +85°C (Note 3)
-65 to +5
70
-30
±0.0083
-0.0154
18.1
-4
-97
0.02
dBm
dB
dBm
dB/°C
dB/°C
mV/dB
µV/°C
dBm
dBm/°C
T
A
= +25°C to +85°C,
P
IN
= -25dBm
T
A
= -40°C to +25°C,
P
IN
= -25dBm
(Note 4)
T
A
= -40°C to +85°C
(Note 5)
T
A
= -40°C to +85°C
(Note 2)
T
A
= -40°C to +85°C (Note 3)
-65 to +5
70
-30
+0.0083
-0.0154
19
-4
-100
0.03
dBm
dB
dBm
dB/°C
dB/°C
mV/dB
µV/°C
dBm
dBm/°C
SYMBOL
f
RF
S
11
P
IN
= no signal to 0dBm,
±0.5dB settling accuracy
CONDITIONS
MIN
TYP
0.1 to 3
-15
150
MAX
UNITS
GHz
dB
ns
MAX2015
_______________________________________________________________________________________
3
0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
MAX2015
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2015 typical application circuit (Figure 1), V
S
= +3.3V, f
RF
= 100MHz to 3000MHz, R1 = 0Ω, R4 = 0Ω, R
L
= 10kΩ, T
A
= -40°C to
+85°C, unless otherwise noted. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Intercept
Typical Intercept Variation
RSSI MODE—2.5GHz
RF Input Power Range
±3dB Dynamic Range
Range Center
Temp Sensitivity when T
A
> +25°C
Temp Sensitivity when T
A
< +25°C
Slope
Typical Slope Variation
Intercept
Typical Intercept Variation
T
A
= +25°C to +85°C,
P
IN
= -25dBm
T
A
= -40°C to +25°C,
P
IN
= -25dBm
(Note 4)
T
A
= -40°C to +85°C
(Note 5)
T
A
= -40°C to +85°C
(Note 2)
T
A
= -40°C to +85°C (Note 3)
-45 to -5
40
-25
-0.0083
-0.0083
16.8
-8
-81
0.03
dBm
dB
dBm
dB/°C
dB/°C
mV/dB
µV/°C
dBm
dBm/°C
SYMBOL
(Note 5)
T
A
= -40°C to +85°C
CONDITIONS
MIN
TYP
-83
0.03
MAX
UNITS
dBm
dBm/°C
Note 1:
The MAX2015 is guaranteed by design for T
A
= -40°C to +85°C, as specified.
Note 2:
Typical minimum and maximum range of the detector at the stated frequency.
Note 3:
Dynamic range refers to the range over which the error remains within the stated bounds. The error is calculated at -40°C
and +85°C, relative to the curve at +25°C.
Note 4:
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 5:
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.
4
_______________________________________________________________________________________
0.1GHz to 3GHz, 75dB Logarithmic
Detector/Controller
MAX2015
Typical Operating Characteristics
(MAX2015 typical application circuit (Figure 1), V
S
= V
CC
= 3.3V, P
IN
= -10dBm, f
IN
= 100MHz, R1 = 0Ω, R4 = 0Ω, R
L
= 10kΩ, V
PWDN
=
0V, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE
vs. INPUT POWER
MAX2015 toc01
OUTPUT-VOLTAGE ERROR
vs. INPUT POWER
MAX2015 toc02
OUTPUT-VOLTAGE ERROR
vs. INPUT POWER
f
IN
= 0.1GHz, T
A
= +85°C
NORMALIZED TO DATA AT +25°C
V
CC
= 3.6V
MAX2015 toc03
2.0
f
IN
= 0.1GHz
1.8
OUTPUT VOLTAGE (V)
1.6
3
2
1
ERROR (dB)
0
-1
T
A
= -40°C
T
A
= +25°C
f
IN
= 0.1GHz
NORMALIZED TO DATA AT +25°C
T
A
= +85°C
3
2
1
ERROR (dB)
0
-1
-2
-3
1.4
1.2
T
A
= +85°C
1.0
0.8
0.6
0.4
-70
-60
-50
-40
-30
-20
-10
0
10
INPUT POWER (dBm)
T
A
= +25°C
T
A
= -40°C
V
CC
= 2.7V
V
CC
= 3.0V
V
CC
= 3.3V
-2
-3
-70
-60
-50
-40
-30
-20
-10
0
INPUT POWER (dBm)
-70
-60
-50
-40
-30
-20
-10
0
10
INPUT POWER (dBm)
OUTPUT-VOLTAGE ERROR
vs. INPUT POWER
MAX2015 toc04
OUTPUT VOLTAGE
vs. INPUT POWER
MAX2015 toc05
OUTPUT-VOLTAGE ERROR
vs. INPUT POWER
f
IN
= 0.9GHz
NORMALIZED TO DATA AT +25°C
T
A
= +85°C
T
A
= +25°C
MAX2015 toc06
3
2
1
ERROR (dB)
V
CC
= 2.7V
0
-1
V
CC
= 3.3V
-2
-3
-70
-60
-50
-40
-30
-20
-10
0
V
CC
= 3.6V
V
CC
= 3.0V
f
IN
= 0.1GHz, T
A
= -40°C
NORMALIZED TO DATA AT +25°C
2.0
f
IN
= 0.9GHz
1.8
OUTPUT VOLTAGE (V)
1.6
3
2
1
ERROR (dB)
0
-1
1.4
1.2
1.0
0.8
0.6
0.4
-70
-60
-50
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
-2
-3
T
A
= -40°C
10
-40
-30
-20
-10
0
10
-70
-60
-50
-40
-30
-20
-10
0
10
INPUT POWER (dBm)
INPUT POWER (dBm)
INPUT POWER (dBm)
OUTPUT-VOLTAGE ERROR
vs. INPUT POWER
MAX2015 toc07
OUTPUT-VOLTAGE ERROR
vs. INPUT POWER
MAX2015 toc08
OUTPUT VOLTAGE
vs. INPUT POWER
f
IN
= 1.9GHz
1.8
OUTPUT VOLTAGE (V)
1.6
1.4
1.2
1.0
0.8
T
A
= +85°C
MAX2015 toc09
3
2
1
ERROR (dB)
0
-1
-2
-3
-70
-60
-50
-40
-30
-20
-10
0
f
IN
= 0.9GHz, T
A
= +85°C
NORMALIZED TO DATA AT +25°C
3
2
1
ERROR (dB)
V
CC
= 2.7V
0
-1
-2
-3
V
CC
= 3.0V
f
IN
= 0.9GHz, T
A
= -40°C
NORMALIZED TO DATA AT +25°C
2.0
V
CC
= 3.6V
V
CC
= 2.7V
V
CC
= 3.0V
V
CC
= 3.3V
V
CC
= 3.3V
V
CC
= 3.6V
0.6
0.4
-60
T
A
= +25°C
T
A
= -40°C
-50
-40
-30
-20
-10
0
10
10
-70
-60
-50
-40
-30
-20
-10
0
10
INPUT POWER (dBm)
INPUT POWER (dBm)
INPUT POWER (dBm)
_______________________________________________________________________________________
5
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