AD8369 is a digitally controlled variable gain amplifier (VGA) from Analog Devices, with a gain range of -5 dB to +40 dB. It can be controlled via a 4-bit parallel or 3-wire serial interface.
The AD8369 is a high‑performance digitally controlled variable gain amplifier (VGA) that provides a 45 dB gain range in 3 dB steps from low frequencies to a 3‑dB bandwidth of 600 MHz. It features a 4‑bit parallel or 3‑wire serial interface, differential 200 Ω input and output impedance, and operates from a single 3.0‑5.5 V supply drawing 37 mA at 5 V.
Typical applications include cellular/PCS base stations, IF sampling receivers, fixed wireless access, wireline modems, and instrumentation. The device is supplied in a 16‑lead TSSOP package (RU‑16) for the industrial temperature range –40 °C to +85 °C, and an evaluation board is available.
| Frequency Range (3 dB Bandwidth) | 600 MHz |
|---|---|
| Voltage Gain Span | 45 dB |
| Supply Voltage | 3.0 V – 5.5 V |
| Quiescent Current (PWUP high) | 37 mA |
| Gain Step Size | 3 dB |
| Input Resistance | 200 Ω |
| Output Resistance | 200 Ω |
| Noise Figure | 7 dB |
The device operates from a single supply of 3.0 V to 5.5 V.
It draws about 37 mA at 5 V when powered up.
The gain changes in 3 dB steps.
When all gain bits are high, the maximum gain is 40 dB.