The AD8317 is a demodulating logarithmic amplifier, capable of accurately converting an RF input signal to a DC output voltage. It can be applied to RF transmitter PA setpoint control and level monitoring, power monitoring in radio link transmitters, RSSI measurement in base stations, WLANs, WiMAX, and radars.
The AD8317 log detector/controller converts RF input signals from 1 MHz to 10 GHz into a decibel‑scaled voltage. It is used for RF transmitter PA set‑point control, power monitoring in radio links, and RSSI measurement in base stations, WLANs, WiMAX and radars.
Key specifications include a supply voltage of 3.0 V to 5.5 V, typical quiescent current of 18‑22 mA, input impedance of 1500 Ω || 0.33 pF, a slope of –22 mV/dB, and an intercept of 15 dBm. The device offers a 55 dB dynamic range up to 8 GHz with less than ±3 dB error and a pulse response time of 6 ns (fall) / 10 ns (rise).
| Frequency Range | 0.001 GHz – 10 GHz |
|---|---|
| Dynamic Range (typical) | 55 dB up to 8 GHz (+3 dB error) |
| Supply Voltage | 3.0 V – 5.5 V |
| Quiescent Current | 18 mA – 22 mA |
| Input Impedance (typical) | 1500 Ω || 0.33 pF |
| Intercept (typical) | 15 dBm |
| Pulse Response Time | 6 ns fall / 10 ns rise |
The AD8317 operates from 1 MHz to 10 GHz.
It requires a supply voltage between 3.0 V and 5.5 V.
The device provides a typical dynamic range of 55 dB up to 8 GHz with less than ±3 dB error.
The pulse response time is 6 ns falling and 10 ns rising.