This document describes the AD7667, a 16-bit 1 MSPS PulSAR® unipolar ADC with features such as a 2.5V internal reference and 1 MSPS throughput.
The AD7667 is a 16‑bit, 1 MSPS charge‑redistribution SAR analog‑to‑digital converter that operates from a single 5 V supply. It offers an internal 2.5 V reference, selectable warp (1 MSPS), normal (800 kSPS) and impulse (666 kSPS) modes, and both parallel and 2‑wire serial interfaces compatible with 3 V and 5 V logic.
Typical applications include data acquisition, medical instruments, digital signal processing, battery‑powered systems and process control. The datasheet provides detailed specifications, pin‑out descriptions, timing diagrams, absolute maximum ratings, layout recommendations, and ordering information for the LQFP and LFCSP packages.
| Resolution | 16 Bits |
|---|---|
| Throughput (Warp mode) | 1 MSPS |
| Analog input voltage range | 0 V to 2.5 V |
| Signal‑to‑Noise Ratio (20 kHz) | 88 dB min |
| Total Harmonic Distortion (20 kHz) | -96 dB max |
| Integral Non‑Linearity | +2.0 LSB max |
| Power dissipation (without REF) at 666 kSPS | 87 mW typ |
The AD7667 can sample at up to 1 MSPS in Warp mode, 800 kSPS in Normal mode, and 666 kSPS in Impulse mode.
In Impulse mode the power dissipation decreases with throughput, roughly proportional to the sampling rate.