AD7776/AD7777/AD7778 are 10-bit SAR ADCs from AD company, with high accuracy, low power consumption and low cost.
This document provides the electrical specifications, timing diagrams, and pin configurations for the AD7776, AD7777, and AD7778 analog-to-digital converters (ADCs). These devices are designed for high-speed applications with a 10-bit resolution and support for single or double conversion modes.
The datasheet details the absolute maximum ratings, operating conditions, and dynamic performance metrics such as signal-to-noise ratio and total harmonic distortion. It also includes circuit descriptions explaining the ADC transfer function and the relationship between the reference voltage and input signal swing.
| Relative Accuracy | ±1 LSB max |
|---|---|
| Bias Offset Error | ±12 LSB max |
| Input Voltage Range | VBIAS ± VSWING |
| Reference Input Voltage | 1.9/2.1 V min/V max |
| Reference Output Voltage | 1.9/2.1 V min/V max |
| Operating Temperature Range | –40 °C to +85°C |
| Signal to Noise and Distortion Ratio | –56 dB min |
| Total Harmonic Distortion | –60 dB min |
| Power Supply Voltage | 4.75/5.25 V min/V max |
The nominal reference voltage is 2.0 V, with a specified range of 1.9 V to 2.1 V.
The maximum input current for any analog channel is +200 µA.
Power-up time to operational specifications is a maximum of 500 µs.
The minimum operating temperature for all versions is –40 °C.