The AD7908/AD7918/AD7928 are respectively 8-bit, 10-bit, and 12-bit, high speed, low power, 8-channel, successive approximation ADCs.
The AD7908, AD7918, and AD7928 are high‑speed, low‑power, 8‑channel successive‑approximation ADCs that operate from a single 2.7 V to 5.25 V supply. They provide up to 1 MSPS throughput rates and feature a built‑in channel sequencer, flexible power/clock management, and a V‑DRIVE function that allows direct interfacing to 3 V or 5 V digital systems.
The datasheet details electrical specifications, pin functions, timing diagrams, absolute maximum ratings, and ordering information. It also includes performance graphs for power versus throughput and serial interface timing for each device variant.
| Resolution | 8‑bit (AD7908), 10‑bit (AD7918), 12‑bit (AD7928) |
|---|---|
| Maximum Throughput Rate | 1 MSPS |
| Supply Voltage Range | 2.7 V to 5.25 V |
| Analog Input Voltage Range | 0 V to REF IN (or 0 V to 2×REF IN) |
| Power Dissipation (3 V supply, normal mode) | 6 mW max |
| Number of Analog Input Channels | 8 single‑ended inputs |
The devices can sample at up to 1 MSPS.
They operate from a single supply of 2.7 V to 5.25 V.
Each device provides eight single‑ended analog input channels.
Power dissipation is 6 mW max at 3 V supply.