The AD8335 is a low noise, low cost quad variable gain amplifier with an 85 MHz bandwidth and excellent overload performance. It provides a gain range of ±10 dB to ±38 dB with an 8 dB gain step. The AD8335 is suitable for applications such as medical imaging (ultrasound, gamma cameras), sonar, test and measurement, etc.
The AD8335 is a quad variable gain amplifier with a low‑noise preamplifier, designed for cost‑ and power‑sensitive applications such as medical imaging, sonar and test equipment. It offers a gain range of up to 48 dB per channel, differential signal paths and selectable high‑ and low‑gain modes.
The datasheet includes detailed specifications, absolute maximum ratings, pin configuration, typical performance curves, test circuits, and an ordering guide. It also describes the evaluation board and mechanical dimensions of the 64‑lead LFCSP package.
| Voltage noise | 1.3 nV/√Hz typical |
|---|---|
| Current noise | 2.4 pA/√Hz typical |
| Supply voltage | 5 V |
| Power consumption per channel (PrA and VGA enabled) | 95 mW |
| Operating temperature range | -40°C to +85°C |
| Package | 64‑lead LFCSP (9 mm × 9 mm) |
| Maximum input voltage (single‑ended) | 625 mV p‑p |
The typical voltage noise is 1.3 nV/√Hz.
It operates from a 5 V supply and each channel consumes 95 mW when both the preamplifier and VGA are enabled.
The maximum single‑ended input voltage is 625 mV peak‑to‑peak.
It is offered in a 64‑lead lead‑frame chip‑scale package measuring 9 mm × 9 mm.