AD7894 is a fast, 14-bit, 5 V supply, 5 µs conversion time analog-to-digital converter (ADC) from AD, housed in a small 8-lead SOIC. The part contains a 5 µs successive approximation A/D converter, an on-chip track/hold amplifier, an on-chip clock and a high speed serial interface. Output data from the AD7894 is provided via a high speed, serial interface port. This two-wire serial interface has a serial clock input, a serial data output and a busy output. The AD7894 is available in three versions with different input ranges. The AD7894-10 accepts input signals ranging from -10 V to +10 V, the AD7894-3 accepts input signals ranging from -2.5 V to +2.5 V and the AD7894-2 accepts input signals ranging from 0 V to +2.5 V.
The AD7894 is a 14‑bit successive‑approximation ADC that operates from a single +5 V supply and is offered in an 8‑lead SOIC package. It provides a track/hold amplifier, selectable input ranges (+10 V, +2.5 V, or 0‑2.5 V), and a two‑wire serial interface for data and clock.
Typical performance includes a 5 µs conversion time in high‑speed mode, 20 mW typical power dissipation, and a maximum throughput of 160 kHz. The device includes an automatic power‑down mode that reduces consumption when idle, making it suitable for battery‑powered applications.
| Power Dissipation (typical) | 20 mW |
|---|---|
| Supply Voltage | +5 V single supply |
| Serial Interface | High‑speed two‑wire |
| Power‑down Mode | Automatic after conversion |
It operates from a single +5 V supply.
The device typically consumes 20 mW of power.