AD8317 Datasheet – Log Detector / Controller ( PDF )

Part Number: AD8317

Function: 1 MHz to 10 GHz, 55 dB, Log Detector / Controller

Package: 2 mm × 3 mm LFCSP 8 Pin Type

Manufacturer: Analog Devices


AD8317 datasheet



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.

The AD8317 maintains accurate log conformance for signals of 1 MHz to 8 GHz and provides useful operation to 10 GHz. The input dynamic range is typically 55 dB (re: 50 Ω) with less than ±3 dB error. The AD8317 has 6 ns/10 ns response time (fall time/rise time) that enables RF burst detection to a pulse rate of beyond 50 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature conditions. A supply of 3.0 V to 5.5 V is required to power the device. Current consumption is typically 22 mA, and it decreases to 200 μA when the device is disabled.


1. Wide bandwidth: 1 MHz to 10 GHz
2. High accuracy: ±1.0 dB over temperature
3. 55 dB dynamic range up to 8 GHz ± 3 dB error
4. Stability over temperature: ±0.5 dB
5. Low noise measurement/controller output, VOUT
6. Pulse response time: 6 ns/10 ns (fall/rise)
7. Small footprint, 2 mm × 3 mm LFCSP
8. Supply operation: 3.0 V to 5.5 V @ 22 mA
9. Fabricated using high speed SiGe process


1. RF transmitter PA setpoint control and level monitoring
2. Power monitoring in radio link transmitters
3. RSSI measurement in base stations, WLANs, WiMAX, and radars

Other data sheets are available within the file:


AD8317 Datasheet PDF Download

AD8317 pdf