TI DAC9881 18位低噪声DAC方案

TI公司的DAC9881是18位单路低噪音电压输出的数模转换器,具有18位的分辨率和24nV/√Hz的低噪音,典型的低功耗为4mW,可应用在自动测试设备(ATE),仪表,工业过程控制,数据采集系统和通信设备.本文介绍了DAC9881的主要特性,方框图以及数模转换架构与闭环模拟输出配置连接图.
18-Bit, Single-Channel, Low-Noise, Voltage-Output DIGITAL-TO-ANALOG CONVERTER

The DAC9881 is the industrys highest accuracy digital-to-analog converter (DAC). Featuring 18-bit monotonic performance, ±2 LSB INL, ±1 LSB DNL and small QFN package, the DAC9881 increases system performance and simplifies designs in precision industrial applications.

DAC9881主要特性:
18-bit resolution
18-bit monotonic performance
±2 LSB integral nonlinearity (INL)
±1 LSB differential nonlinearity (DNL)
Low noise: 24nV/√Hz
Low power: 4mW (typical)
Settling time: 5μs (typical)
50MHz SPI interface with 1.8V/3V/5V compatible logic
QFN-24 (4mm x 4mm) package

主要应用:
Automatic test equipment
Instrumentation
Industrial process control
Data acquisition systems
Communications



图1. DAC9881方框图



图2. DAC9881架构



图3.DAC9881闭环模拟输出配置连接图