The AD7891 is a high-speed data acquisition system with 8 single-ended analog input channels and a 12-bit fast ADC. It also features overvoltage protection, selectable input ranges, and parallel and serial interfaces. The system is suitable for applications such as data acquisition systems, motor control, mobile communication base stations, and instrumentation.
The AD7891 from Analog Devices is an 8‑channel, 12‑bit analog‑to‑digital converter designed for high‑speed data acquisition. It offers selectable input ranges (+5 V, +10 V for AD7891‑1; 0‑2.5 V, 0‑5 V, +2.5 V for AD7891‑2), over‑voltage protection on each channel, and both parallel and serial interface options.
The device operates from a single 5 V supply, consumes less than 100 mW in normal mode, and is available in 44‑lead MQFP and PLCC packages. Detailed specifications, pin configurations, and timing characteristics are provided for designers.
| Maximum Sample Rate | 500 kSPS (AD7891‑2) |
|---|---|
| Input Range (AD7891‑1) | +5 V, +10 V |
The AD7891 provides eight single‑ended analog input channels.
The AD7891 is offered in a 44‑lead MQFP and a 44‑lead PLCC package.