AD605 Rev. F is a dual, low noise, single-supply variable gain amplifier. It features 2 independent linear-in-dB channels, with input noise at maximum gain of 1.8 nV/√Hz, 2.7 pA/√Hz, and a bandwidth of 40 MHz (-3 dB). It has a programmable absolute gain range, with a gain range of -14 dB to +34 dB (FBK shorted to OUT) or 0 dB to 48 dB (FBK open). It also has variable gain scaling, stable gain with temperature and supply variations, single-ended unipolar gain control, and other features.
The AD605 is a dual, low‑noise, single‑supply variable‑gain amplifier optimized for applications such as ultrasound, sonar time‑gain control, high‑performance AGC systems, and signal measurement. It offers differential inputs, unipolar gain control, and a programmable gain range with a single 5 V supply.
Key specifications include a gain range of –14 dB to +34 dB (or 0 dB to 48 dB), 40 MHz –3 dB bandwidth, 90 mW power dissipation per channel, and low input noise (1.8 nV/√Hz). The device is available in 16‑lead PDIP and SOIC packages and operates over –40 °C to +85 °C.
| Input Resistance | 175 Ω ±40 Ω |
|---|---|
| Gain Range | –14 dB to +34 dB (FBK short) or 0 dB to 48 dB (FBK open) |
Each channel provides a gain range of –14 dB to +34 dB when the FBK pin is shorted to OUT, or 0 dB to 48 dB when FBK is left open.