General Description

The MAX4000/MAX4001/MAX4002 low-cost, low-power logarithmic amplifiers are designed to control RF power amplifiers (PA) operating in the 0.1GHz to 2.5GHz frequency range. A typical dynamic range of 45dB makes this family of log amps useful in a variety of wireless applications including cellular handset PA control, transmitter power measurement, and RSSI for terminal devices.

Features

♦ Complete RF-Detecting PA Controllers

♦ Variety of Input Ranges

MAX4000: -58dBV to -13dBV

(-45dBm to 0dBm in 50Ω)

MAX4001: -48dBV to -3dBV

(-35dBm to +10dBm in 50Ω)

MAX4002: -43dBV to +2dBV

(-30dBm to +15dBm in 50Ω)

♦ Frequency Range from 100MHz to 2.5GHz

♦ Temperature Stable Linear-in-dB Response

♦ Fast Response: 70ns 10dB Step

♦ 10mA Output Sourcing Capability

♦ Low Power: 17mW at 3V (typ)

♦ Shutdown Current 30µA (max)

♦ Available in an 8-Bump UCSP and a Small 8-Pin

µMAX Package

Applications

Transmitter Power Measurement and Control

TSSI for Wireless Terminal Devices

Cellular Handsets (TDMA, CDMA, GPRS, GSM)

RSSI for Fiber Modules