原创 AD7705BRZ-REEL: 3V/5V、1 mW、双通道差分、16位Σ-Δ ADC

    AD7705和AD7706均是完整的16位低成本Σ-Δ模数转换器（ADC），用于直流测量和低频交流测量应用，其具有低功耗（3 V时最大1 mW）特性，因而能用在环路供电、电池供电或本地供电的应用中。片内可编程增益放大器提供从1至128的增益设置，无需使用外部信号调节硬件便可接受低电平和高电平模拟输入。

    AD7705拥有两个差分通道，而AD7706则拥有一个差分通道和两个伪差分通道。在定制比率应用器件时，差分基准电压输入还能提供极大的灵活性。

    两个全差分输入通道ADC
    可编程增益前端
    增益范围从1至128
    三线串行接口
    SPI?, QSPI?, MICROWIRE?, DSP 兼容
    SCLK上可接受施密特触发器输入
    提供模拟输入缓冲
    工作电压2.7 V至3.3 V或4.75 V至5.25 V
    3 V时最大功耗为1 mW
    待机电流最大8 μA
    16引脚DIP、16引脚SOIC和TSSOP封装

The AD7705 and AD7706 are complete 16-bit, low-cost, Sigma Delta ADCs intended for dc and low-frequency ac measurement applications. Their low power (1 mW max @ 3 V) allows them to be used in loop-powered, battery-powered or locally-powered applications. The on-chip Programmable Gain Amplifier with gain settings from I through 128 can accommodate both low-level and high-level analog inputs with no external signal conditioning hardware.

The AD7705 has two differential channels while the AD7706 has one differential and two pseudo-differential channels. Differential reference inputs also allow maximum flexibility in tailoring the device for use in ratiometric applications