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GENERAL DESCRIPTION

The AD8317 is a demodulating logarithmic amplifier, capableof accurately converting an RF input signal to a corresponding decibel-scaled output. It employs the progressive compression technique over a cascaded amplifier chain, each stage of which is equipped with a detector cell. The device can be used in either measurement or controller modes.

FEATURES

Wide bandwidth: 1 MHz to 10 GHz

High accuracy: ±1.0 dB over temperature

55 dB dynamic range up to 8 GHz ± 3 dB error

Stability over temperature: ±0.5 dB

Low noise measurement/controller output, VOUT

Pulse response time: 6 ns/10 ns (fall/rise)

Small footprint, 2 mm × 3 mm LFCSP

Supply operation: 3.0 V to 5.5 V @ 22 mA

Fabricated using high speed SiGe process

APPLICATIONS

RF transmitter PA setpoint control and level monitoring

Power monitoring in radio link transmitters

RSSI measurement in base stations, WLANs, WiMAX, and radars