AD7912/AD7922 are 10-bit and 12-bit, high speed, low power, 2-channel successive approximation ADCs, designed specifically for battery-powered applications, such as mobile devices, data acquisition systems, personal digital assistants, medical instruments, mobile communications, instrumentation and control systems.
The AD7912 and AD7922 are 2‑channel successive‑approximation ADCs offering 10‑bit (AD7912) or 12‑bit (AD7922) resolution with a maximum throughput of 1 MSPS. They operate from a single 2.35 V to 5.25 V supply and feature low power consumption, flexible clock management, and a daisy‑chain mode for multiple‑device configurations.
The document provides detailed specifications, timing diagrams, power‑down modes, and application notes for battery‑powered systems, data‑acquisition equipment, high‑speed modems, and optical sensors.
| Resolution (AD7912) | 10 Bits |
|---|---|
| Resolution (AD7922) | 12 Bits |
| Throughput Rate | 1 MSPS max |
| Supply Voltage Range | 2.35 V to 5.25 V |
| Power Consumption (Normal Mode, 5 V) | 20 mW max |
| Power Consumption (Normal Mode, 3 V) | 6 mW max |
| Input Voltage Range | 0 to Vop |
| Daisy‑Chain Capability | Supported |
The devices can sample at up to 1 MSPS maximum.
They operate from 2.35 V to 5.25 V.
Typical power consumption is 6 mW max at a 3 V supply.
Yes, they support a daisy‑chain mode for connecting several devices.