The AD7694 is a 16‑bit PulSAR ADC with up to 250 kSPS throughput, single‑supply operation and a low‑power SPI interface.
The AD7694 is a 16‑bit charge‑redistribution successive‑approximation ADC that operates from a single supply (2.7 V‑5.25 V). It offers 250 kSPS throughput at 5 V, no missing codes, and a proprietary SPI‑compatible serial interface. The device is housed in an 8‑lead MSOP package and is specified for –40 °C to +85 °C operation.
The datasheet provides detailed specifications, timing diagrams, pin descriptions, recommended driver amplifiers, layout guidelines, and typical performance graphs. It also includes ordering information and an evaluation board reference for system designers.
| Resolution | 16 bits |
|---|---|
| Throughput (max) | 250 kSPS |
| Supply voltage range | 2.7 V to 5.25 V |
| Analog input range | 0 V to VREF |
| Integral Linearity Error (INL) | ±4 LSB max |
| Signal‑to‑Noise Ratio (SNR) | 92 dB at 20 kHz |
| Supply current (5 V, 100 kSPS) | 540 µA |
| Standby current | 1 nA |
| Operating temperature range | –40 °C to +85 °C |
| Package | 8‑lead MSOP |
The AD7694 can sample up to 250 kSPS when powered at 5 V.
It operates from 2.7 V to 5.25 V.
The device draws only 1 nA in standby mode.
The analog inputs accept 0 V to VREF, with VREF up to the supply voltage.