The AD8369 is a digitally controlled variable gain amplifier with a frequency range from LF to 600 MHz and a gain range from -5 dB to +40 dB. It features 0.2 dB flatness and a 4-bit parallel or 3-wire serial interface. This product is suitable for applications such as cellular/PCS base stations, IF sampling receivers, fixed wireless access, wireline modems, and instrumentation.
The AD8369 is a 45 dB digitally controlled variable gain amplifier with 3 dB or 6 dB step options, supporting both parallel and serial digital interfaces. It operates from a single 3.0 V‑5.5 V supply, draws 37 mA at full power and less than 1 mA in power‑down, and is packaged in a 16‑lead TSSOP for industrial temperature ranges.
The datasheet provides full electrical specifications, pin descriptions, absolute maximum ratings, and typical performance graphs. It also includes ordering information and recommended ESD handling procedures for reliable integration into cellular base stations, wireline modems, and other RF applications.
| Frequency Range | LF to 600 MHz |
|---|---|
| Voltage Gain Span | 45 dB |
| Gain Step Size | 3 dB |
| Quiescent Current | 37 mA at 5 V |
| Power‑Down Current | < 1 mA |
| Input Resistance | 200 Ω differential |
| Output Resistance | 200 Ω differential |
| Noise Figure | 7.0 dB |
| Gain Flatness (70 MHz) | +0.1 dB |
| Output IP3 (70 MHz) | +19.5 dBV rms (+19.5 dBm) |
A logic high on the PWUP pin powers the chip up; a logic low powers it down.
The gain changes in 3 dB steps.
When all gain‑control bits are high, the device provides a maximum gain of 40 dB.