AD7997/AD7998 are 8-channel, 10- and 12-bit ADCs with an I2C-compatible interface. The products feature fast conversion time and low power consumption.
The AD7997 and AD7998 are 8‑channel, 10‑ and 12‑bit successive‑approximation ADCs that operate from a 2.7 V to 5.5 V supply and provide a fast 2 µs conversion time. They feature an I2C‑compatible serial interface with standard, fast, and high‑speed modes, pin‑selectable addressing, automatic shutdown, and programmable limit registers.
The document includes detailed specifications for both device versions, timing diagrams, pin configurations, power‑down currents, and recommended operating conditions. It also provides guidance on I2C address selection via the AS pin, conversion modes, and typical performance characteristics such as throughput rates up to 188 kSPS.
| Conversion Time | 2 µs typ |
|---|---|
| Power‑down Current (Interface Inactive) | 1 µA max |
| Input Voltage Range | 0 V to REF IN |
| Operating Temperature Range | −40 °C to +85 °C |
The typical conversion time is 2 µs.
The device draws up to 1 µA in power‑down mode with the interface inactive.
Up to 188 kSPS can be achieved at a 3.4 MHz I2C clock in high‑speed mode.