The AD202 and AD204 are general purpose, two-port, transformer-coupled isolation amplifiers that may be used in a broad range of applications where input signals must be measured, processed, and/or transmitted without a galvanic connection. These industry standard isolation amplifiers offer a complete isolation function, with both signal and power isolation provided for in a single compact plastic SIP or DIP style package. The primary distinction between
The AD204 isolation amplifier is a low‑power, miniature isolation device offering up to +2000 V peak continuous common‑mode isolation, 130 dB CMR at a gain of 100 V/V, and a 5 kHz full‑power bandwidth. It includes an uncommitted input op‑amp and can supply isolated +7.5 V power at 2 mA for auxiliary circuits.
The handbook covers functional block diagrams, power options (the AD204 is powered by an external clock driver such as the AD246), detailed specifications, wiring examples, adjustment procedures, and performance notes on common‑mode rejection, noise, and output filtering.
| Power consumption (AD204) | 35 mW |
|---|---|
| Maximum isolation voltage (Input‑to‑Output) | +2000 V peak |
| Full‑power bandwidth | 5 kHz |
| CMR (gain = 100 V/V) | 130 dB |
| Isolated power output (AD204) | +7.5 V at 2 mA |
The AD204 consumes 35 mW of power over the full signal range.
The device provides up to +2000 V peak continuous isolation between input and output.
It can deliver +7.5 V at 2 mA to power auxiliary circuits.