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

0.1GHz to 2.5GHz, 75dB Logarithmic

Detector/Controller

________________________________________________________________ Maxim Integrated Products

1

Ordering Information

MAX2015

7dB

Σ

50

Ω

20k

Ω

SET

OUT

8

7

2

INHI

INLO

3

6

1, 4

PWDN

5

20k

Ω

Σ

7dB

Σ

7dB

GND

POWER DETECTORS

OFFSET AND COMMON-

MODE AMP

Functional Diagram

19-2998; Rev 1; 12/03

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.

Pin Configuration appears at end of data sheet.

PART

TEMP RANGE

PIN-PACKAGE

MAX2015EUA-T

-40°C to +85°C

8 µMAX

*See Power-Supply Connections section.