AD7709BRU集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

AD7709BRU属于集成电路（IC）的模数转换器（ADC）。由亚德诺半导体技术有限公司制造生产的AD7709BRU模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。

GENERAL DESCRIPTION

The AD7709 is a complete analog front end for low frequency measurement applications. It contains a 16-bit Σ-Δ ADC, selectable reference inputs, three switchable matched excitation current sources, low-side power switches, and a digital I/O port. The 16-bit channel with PGA accepts fully differential, unipolar, and bipolar input signal ranges from 1.024 x REFIN/128 to 1.024 x REFIN. It can be configured as two fully differential input channels or four pseudo-differential input channels. Signals can be converted directly from a transducer without the need for signal conditioning.

FEATURES

16-Bit Σ-Δ ADC

Programmable Gain Front End

Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate

VREF Select™ Allows Absolute and Ratiometric Measurement Capability

ISOURCE Select™

16-Bit No Missing Codes

13-Bit p-p Resolution @ 20 Hz, 20 mV Range

16-Bit p-p Resolution @ 20 Hz, 2.56 V Range

INTERFACE

3-Wire Serial

SPI®, QSPI™, MICROWIRE™, and DSP Compatible

Schmitt Trigger on SCLK

POWER

Specified for Single 3 V and 5 V Operation

Normal: 1.25 mA Typ @ 3 V

Power-Down: 7 A (32.768 kHz Crystal Running)

ON-CHIP FUNCTIONS

Rail-to-Rail Input Buffer and PGA

Selectable Reference Inputs

3 Switchable, Ratioed Current Sources for VBE Measurements

4-Bit Digital I/O Port

Low-Side Power Switches

APPLICATIONS

Sensor Measurement

Temperature Measurement

Pressure Measurements

Weigh Scales

Portable Instrumentation

4–20 mA Loops