AD7634 Rev. 0 is an ADC chip produced by Analog Devices. It has multiple input ranges, a 670 kSPS conversion rate, an 18-bit resolution, and other features.
The AD7634 is an 18‑bit charge‑redistribution successive approximation register (SAR) analog‑to‑digital converter (ADC) fabricated in Analog Devices' iCMOS high‑voltage process. It offers multiple programmable input ranges, three sampling modes, and both parallel and serial interfaces, making it suitable for high‑dynamic data acquisition, medical instruments, and process control applications.
The document provides full electrical specifications, timing diagrams, pin descriptions, absolute maximum ratings, and layout guidelines to help designers integrate the AD7634 into printed‑circuit boards while minimizing noise and ensuring reliable operation.
| Resolution | 18 bits |
|---|---|
| Maximum Throughput (warp mode) | 670 kSPS |
| Power Dissipation (warp mode) | 180 mW |
| Input Voltage Range (±5 V) | 5 V (10 V p‑p) |
| Operating Temperature Range | -40 °C to +85 °C |
The AD7634 can sample up to 670 kSPS in warp mode.
At 670 kSPS in warp mode the device dissipates about 180 mW.
The ADC supports four programmable ranges: 5 V (10 V p‑p), +10 V (20 V p‑p), +5 V (20 V p‑p), and +10 V (40 V p‑p).