This document provides preliminary technical data for the AD7641, an 18-bit, 2 MSPS SAR ADC. The product features include 18-bit resolution with no missing codes, a 2.5V internal low drift reference, and a throughput of 2 MSPS in Warp mode or 1.5 MSPS in Normal mode.
The document describes the AD7641, a fully differential analog-to-digital converter (ADC) with 18-bit resolution and no missing codes. It operates from a single 2.5 V power supply and offers two throughput modes: Warp mode at 2 MSPS and Normal mode at 1.5 MSPS.
The device includes an internal low-drift reference, error correction circuits, and both serial (SPI/QSPI/Microwire/DSP compatible) and parallel system interface ports. It is designed for applications such as medical instruments, high dynamic data acquisition, instrumentation, spectrum analysis, and automated test equipment (ATE).
| Resolution | 18 Bits |
|---|---|
| Throughput Rate (Warp Mode) | 2 MSPS |
| Throughput Rate (Normal Mode) | 1.5 MSPS |
| Integral Linearity Error | +2 LSB typical |
| Signal-to-Noise Ratio | 93 dB typical @ 100 kHz |
| Total Harmonic Distortion | -100 dB typical @ 100 kHz |
| Operating Temperature Range | -40°C to +85°C |
The device features a high-speed Warp mode at 2 MSPS and a fast Normal mode at 1.5 MSPS.
The AD7641 operates from a single 2.5 V power supply.
Yes, it supports SPI/QSPI/Microwire/DSP compatible serial interfaces.