AD8307 is a low-cost, DC to 500 MHz, 92 dB logarithmic amplifier.
The AD8307 logarithmic amplifier provides a 92 dB dynamic range from –75 dBm to +17 dBm, with a typical slope of 25 mV/dB and an intercept of –84 dBm. It operates from a single supply of 2.7 V to 5.5 V, drawing about 7.5 mA typical current, and offers a fast 100 ns power‑up time and low standby current (<150 µA). The device is fully differential, temperature‑stable, and suitable for applications such as signal‑level conversion, RSSI measurement, radar and sonar processing, and spectrum analysis.
The AD8307 is available in 8‑lead PDIP (N‑8) and 8‑lead SOIC (R‑8) packages and is rated for an industrial temperature range of –40 °C to +85 °C. Pin functions include differential inputs (INP, INM), offset and intercept adjustment pins, a CMOS‑compatible enable pin, and a supply pin (VPS). The datasheet includes detailed specifications, absolute maximum ratings, pin descriptions, typical performance curves, and an ordering guide.
| Dynamic range | 92 dB |
|---|---|
| Supply voltage | 2.7 V to 5.5 V |
| Supply current (typical) | 7.5 mA |
| Output slope | 25 mV/dB |
| Input frequency range | DC to 500 MHz |
| Operating temperature range | -40 °C to +85 °C |
| Input noise spectral density | 1.5 nV/√Hz |
| Output resistance | 12.5 kΩ |
The AD8307 operates from a single supply of 2.7 V to 5.5 V.
The device provides a 92 dB dynamic range, from –75 dBm to +17 dBm.