AD7719BRZ: 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.
AD7719BRZ 特点
高分辨率Σ-Δ型ADC
- 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
ISOURCE SelectTM
- 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）
接口
- 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
ISOURCE SelectTM
- 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
Interface
- 3-Wire Serial
- SPI(R), QSPITM, MICROWIRETM, and DSP Compatible
- Schmitt Trigger on SCLK
AD7719BRZ 功能框图
| 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 |
AD7719BRZ 应用技术支持与电子电路设计开发资源下载
- AD7719 数据手册DataSheet下载. pdf
- Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .PDF
- ADC模数转换器选型指南 . PDF