AD7716 is a LC2MOS 22-bit data acquisition system from AD company. It can process four channels with a bandwidth of up to 584 Hz. The resolution is 22 bits and the dynamic range is 111 dB (bandwidth 36.5 Hz) to 99 dB (bandwidth 584 Hz). The chip includes four independent A/D converter channels implemented using Sigma-Delta technology. Internal digital filtering simplifies system filtering requirements.
The AD7716 is a 22‑bit sigma‑delta analog‑to‑digital converter designed for high‑accuracy data acquisition in biomedical, process control, and instrumentation applications. It features a programmable on‑chip low‑pass filter with five selectable cutoff frequencies, three address pins for up to 32‑channel systems, and a five‑line serial I/O compatible with DSPs and microcontrollers.
The datasheet provides detailed electrical characteristics, absolute maximum ratings, pin descriptions, timing diagrams for master and slave modes, and ordering information for the 44‑pin PQFP and PLCC packages. It also defines terminology such as linearity error, gain error, and usable dynamic range, and includes example interface circuits for MC68HC11, DSP56001, and TMS320C25 processors.
| Resolution | 22 Bits |
|---|---|
| Integral Linearity Error | 0.003 % FS typ |
| Gain Error | 1 % FS max |
| Power Consumption | 50 mW max, 35 mW typ |
| Supply Voltage (AVpp/DVpp) | +5 V nominal |
| Operating Temperature Range (B version) | -40 °C to +85 °C |
| Package Types | 44‑pin PQFP, 44‑pin PLCC |
| Number of Address Pins | 3 (A0‑A2) |
It has three address pins (A0, A1, A2) that allow up to 32 devices to be addressed in a system.
Typical power consumption is 35 mW, with a maximum of 50 mW.