This document describes the features and characteristics of Analog Devices' AD7903 dual-channel 16-bit successive approximation analog-to-digital converter (ADC). The ADC has a resolution of 16 bits, a throughput rate of 1 MSPS, low power consumption, and a typical integral nonlinearity (INL) of ±0.5 LSB. It operates on a single 2.5 V power supply and provides 1.8 V/2.5 V/3 V/5 V logic interfaces, supporting various serial interfaces. The ADC is suitable for applications such as battery-powered devices, communications, automatic test equipment (ATE), data acquisition, and medical instruments.
The AD7903 is a dual-channel, 16-bit successive approximation register (PulSAR) ADC designed for high-speed data acquisition. It features two independent, low-power ADCs with a total throughput rate of 1 MSPS when powered by VDD and VIO supplies. The device utilizes a three-wire or four-wire serial interface compatible with SPI, QSPI, Microwire, and DSP protocols.
| Resolution | 16-bit |
|---|---|
| Throughput Rate | 1 MSPS |
| Power Consumption (Total) | 12.0 mW |
| Integral Nonlinearity (INL) | ±0.5 LSB typical |
| Total Harmonic Distortion (THD) | -112 dB |
| Operating Temperature Range | -40°C to +125°C |
The device provides a 16-bit resolution without missing codes.
The device achieves a maximum throughput rate of 1 MSPS.
The total power consumption is 7.0 mW when operating at 1 MSPS with only VDD1 and VDD2.
The device operates within a temperature range of −40°C to +125°C.