General Description

The MAX2209 is a wideband (800MHz to 2GHz) RF power detector. It takes an RF signal from the directional coupler at the input, and outputs a DC voltage proportional to the RF peak voltage. The change in output voltage versus temperature is very repeatable from part to part and enables a lookup table based on nominal behavior, minimizing the effective detection error to less than Q0.5dB relative to room temperature.

Features

♦ -25dBm to 0dBm Power Detection Range

♦ ±0.5dB Detection Error Due to Temperature

♦ +2.7V to +5V Single-Supply Operation

♦ Space-Saving 4-Bump, 1mm2 UCSP™ Package

♦ On-Chip 50I Termination and DC-Blocking Capacitor

Applications

    Dual-Band WCDMA Handsets

    High-Speed Downlink Packet Access (HSDPA)

    High-Speed Uplink Packet Access (HSUPA)