The AD7997/AD7998 are 8-channel, 10- and 12-bit, low power, successive approximation ADCs with an I2C-compatible interface. The parts operate from a single 2.7 V to 5.5 V power supply, feature low power consumption, high throughput rate and excellent electromagnetic interference (EMI) performance.
The AD7997/AD7998 family provides eight single‑ended analog inputs with 10‑ or 12‑bit resolution and a fast 2 µs typical conversion time. They operate from 2.7 V to 5.5 V, consume as little as 1 pA in shutdown, and support standard, fast, and high‑speed I²C‑compatible serial interfaces with pin‑selectable addresses.
The devices include programmable registers for limits, alerts, hysteresis, and cycle timing, and they offer features such as automatic shutdown, out‑of‑range indicator, and selectable conversion modes. Both parts are supplied in a 20‑lead TSSOP package and are qualified for –40 °C to +85 °C operation.
| Resolution | 10‑ and 12‑bit |
|---|---|
| Conversion time | 2 µs typ |
| Throughput rate | up to 188 kSPS |
| Operating voltage | 2.7 V to 5.5 V |
| Power consumption (shutdown) | 1 pA max |
| Temperature range | –40 °C to +85 °C |
| Package | 20‑lead TSSOP |
The typical conversion time is 2 µs.
In shutdown mode the device draws only 1 pA maximum.
The devices are rated for –40 °C to +85 °C.