AD7823 is an 8-bit ADC chip launched by Analog Devices. It works at a voltage range of 2.7V to 5.5V, has a conversion time of 5µs, and features small size, low power consumption, and high accuracy. It is suitable for battery-powered handheld portable applications.
This document provides a complete description of the AD7823 8‑bit analog‑to‑digital converter, including its high‑speed, low‑power operation from a single 2.7 V to 5.5 V supply. It covers functional block diagrams, key features, and typical applications such as battery‑powered test equipment.
The datasheet contains detailed specifications, timing characteristics, absolute maximum ratings, pin descriptions, circuit diagrams, and recommended connection schemes. It also explains the automatic power‑down mode, serial interface operation, and pseudo‑differential input configuration.
| Supply Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Resolution | 8 Bits |
| Conversion Time | 4 µs typ |
| Power Dissipation (normal operation) | 17.5 mW max |
| Power Dissipation (power‑down mode) | 5 µW max |
| Analog Input Voltage Range | 0 V to VREF |
| IDD at 133 kSPS | 3.5 mA max |
When enabled, the AD7823 powers down automatically at the end of a conversion and wakes up on the next conversion start, reducing power consumption.
The input leakage current is ±1 µA max.
The device has a power‑up time of 1.5 µs.