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

50MHz to 1000MHz, 75dB Logarithmic

Detector/Controller

________________________________________________________________

Maxim Integrated Products

1

MAX2014

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

19-0583; 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.