LTC1285/LTC1288 3V micropower sampling 12-bit A/D converters in SO-8 packages
The LTC1285 and LTC1288 are 3 V micropower, 12‑bit successive‑approximation ADCs offered in 8‑pin SO and PDIP packages. They feature low supply current (160 µA typical), auto‑shutdown to 1 nA, and differential inputs with on‑chip sample‑and‑hold. The devices operate from 2.7 V to 6 V and support conversion rates up to 15 kHz (LTC1285) or 6.6 kHz (LTC1288).
The handbook includes absolute maximum ratings, recommended operating conditions, detailed electrical characteristics, pin‑out diagrams, and example circuits such as a quick‑look test board and a micropower battery‑monitoring application. Package dimensions and ordering information are also provided.
| Typical Supply Current | 160 µA |
|---|---|
| Auto‑Shutdown Current | 1 nA (typical) |
| Supply Voltage Range | 2.7 V to 6 V |
| Maximum Sampling Frequency (LTC1285) | 15 kHz |
The LTC1285 typically draws 160 µA of supply current.
When not performing conversions, the device shuts down to a typical current of 1 nA.
Pin 5 (CS/SHDN) is the chip‑select input; a logic low enables the LTC1285, while a logic high disables and powers it down.
The LTC1285 can sample at up to 15 kHz.