MAX2015 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 0.1GHz to 2.5GHz, 75dB Logarithmic Detector/Controller

19-2998; Rev 1; 12/03
0.1GHz to 2.5GHz, 75dB Logarithmic
Detector/Controller
General Description
The MAX2015 complete multistage logarithmic amplifier
is designed to accurately convert radio-frequency (RF)
signal power in the 0.1GHz to 2.5GHz 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.
Applications
AGC Measurement and Control
RF Transmitter Power Measurement
RSSI Measurements
Cellular Base Station, WLAN, Microwave Link,
Radar, and other Military Applications
Features
o Complete RF Detector/Controller
o 0.1GHz to 2.5GHz Frequency Range
o Exceptional Accuracy Over Temperature
o High Dynamic Range
o 2.7V to 5.25V Supply Voltage Range*
o Scaling Stable Over Supply and Temperature
Variations
o Controller Mode with Error Output
o Shutdown Mode with Typically 1µA of Supply
Current
o Available in 8-Pin µMAX Package
*See Power-Supply Connections section.
PART
MAX2015EUA-T
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µMAX
Functional Diagram
2
INHI
3
INLO
POWER DETECTORS
Σ
Σ
50Ω
7dB
7dB
V_CC
1, 4
Σ
7dB
8 _OUT
7
SET
20kΩ
5
PWDN
MAX2015
OFFSET AND COMMON-
MODE AMP
20kΩ
6
GND
Pin Configuration appears at end of data sheet.
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