AD7719:低压、低功耗、16位或24位、双核Σ-Δ型ADC

AD7719: 低压、低功耗、16位或24位、双核Σ-Δ型ADC

AD7719是一款适合低频测量应用的完整模拟前端。该器件内置两个高分辨率Σ-Δ 型ADC、可切换匹配激励电流源、低端电源开关、数字I/O端口和温度传感器。24位主通道含有PGA,可输入REFIN1/128至REFIN1范围内的全差分、单极性和双极性信号。来自传感器的信号可直接进行转换,无需进行信号调理。16位辅助通道不含PGA,其输入信号范围为REFIN2或REFIN2/2。

The AD7719 is a complete analog front-end for low frequency measurement applications. It contains two high-resolution sigma delta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port and temperature sensor. The 24-bit main channel with PGA accepts fully differential, unipolar and bipolar input signal ranges from REFIN1/128 to REFIN1. Signals can be converted directly from a transducer without the need for signal conditioning. The 16-bit aux channel does not have a PGA and has an input signal range of REFIN2 or REFIN2/2.

AD7719 特点

两个独立ADC（16位和24位分辨率）
出厂校准（无需现场校准）
输出建立时间为1个转换周期（单转换模式）
可编程增益前端
可同时对两个信号源进行采样和转换
每个通道均有单独的基准电压输入
20 Hz更新速率时,50 Hz、60 Hz同时抑制
24位无失码 - 主ADC
13位峰－峰值分辨率（20 Hz、20 mV范围）
18位峰－峰值分辨率（20 Hz、2.56 V范围）
三线式串行接口
SPI(R), QSPITM, MICROWIRETM,DSP兼容
SCLK上为施密特触发器

2 Independent ADCs (16- and 24-Bit Resolution)
Factory-Calibrated (Field Calibration Not Required)
Output Settles in 1 Conversion Cycle (Single Conversion Mode)
Programmable Gain Front End
Simultaneous Sampling and Conversion of 2 Signal Sources
Separate Reference Inputs for Each Channel
Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate
24-Bit No Missing Codes-Main ADC
13-Bit p-p Resolution @ 20 Hz, 20 mV Range
18-Bit p-p Resolution @ 20 Hz, 2.56 V Range
3-Wire Serial
SPI(R), QSPITM, MICROWIRETM, and DSP Compatible
Schmitt Trigger on SCLK

AD7719 技术指标

Resolution (Bits): 24bit
# Chan: 6
Sample Rate: n/a
Interface: Ser,SPI
Analog Input Type: Diff-Bip,Diff-Uni
Ain Range: (2Vref) p-p,(2Vref/PGA Gain) p-p,(Vref) p-p
ADC Architecture: Sigma-Delta
Pkg Type: SOIC,SOP

AD7719 功能框图

AD7719 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD7719BR	Prodn	28 ld SOIC - Wide	28	工业
AD7719BR-REEL	Prodn	28 ld SOIC - Wide	28	工业
AD7719BR-REEL7	Prodn	28 ld SOIC - Wide	28	工业
AD7719BRU	Prodn	28 ld TSSOP	28	工业
AD7719BRU-REEL7	Prodn	28 ld TSSOP	28	工业
AD7719BRUZ	Prodn	28 ld TSSOP	28	工业
AD7719BRUZ-REEL	Prodn	28 ld TSSOP	28	工业
AD7719BRUZ-REEL7	Prodn	28 ld TSSOP	28	工业
AD7719BRZ	Prodn	28 ld SOIC - Wide	28	工业
EVAL-AD7719EB	Prodn	EVALUATION BOARDS	-	待定