AD8330 is a low cost DC-150MHz variable gain amplifier from Analog Devices. This product has a fully differential signal path and can also be used with single-ended signals. The input range is from 0.3mV to 1Vrms and the output is rail-to-rail. The differential RIN is 1kΩ and each output ROUT is 75Ω. This product also has automatic offset compensation and can operate in either linear dB or linear magnitude gain modes. In the linear dB gain mode, the gain range is from 0dB to 50dB with a gain slope of 30mV/dB. In the inverted gain mode, the gain range is from 50dB to 0dB with a gain slope of -30mV/dB. The input voltage VMAG is in the range of -0.03 to -10.
The AD8330 is a wideband variable gain amplifier designed for applications that require a fully differential signal path, low noise, well‑defined gain, and moderate distortion from DC to 150 MHz. It supports both differential and single‑ended inputs, with input ranges from 0.3 mV to 1 V rms and rail‑to‑rail outputs.
Key features include a linear‑in‑dB gain control from 0 dB to 50 dB (30 mV/dB), an inverted gain mode, constant 150 MHz bandwidth at all gains, low power consumption (20 mA typical at 2.7‑6 V), and availability in compact 16‑lead LFCSP and QSOP packages.
| Gain range | 0 dB to 50 dB |
|---|---|
| Bandwidth | 150 MHz (constant across gain) |
| Input voltage range | 0.3 mV to 1 V rms |
| Supply voltage | 2.7 V to 6 V |
| Quiescent current | 20 mA typical |
| Noise density | 5 nV/√Hz typical at max gain |
| Distortion | < –62 dBc typical |
| Package options | 16‑lead LFCSP or 16‑lead QSOP |
The AD8330 provides a gain range from 0 dB to 50 dB (30 mV per dB).
It maintains a constant 150 MHz bandwidth at all gain settings.
The device operates from a supply voltage of 2.7 V to 6 V.
It is offered in 16‑lead LFCSP and 16‑lead QSOP packages.