AD7707BRZ: 适合低频测量应用的完整模拟前端
AD7707是一款适合低频测量应用的完整模拟前端。这款3通道器件既可以直接从传感器接受低电平输入信号,也可以接受高电平（±10 V）信号,并产生串行数字输出。该器件采用Σ-∆转换技术,可实现最高16位无失码性能。选定的输入信号作用于一个以模拟调制器为基础的专有可编程增益前端。调制器输出由片内数字滤波器处理。此数字滤波器的第一个陷波可通过片内控制寄存器进行编程,以便对滤波器截止和输出更新速率进行调整。
The AD7707 is a complete analog front end for low frequency measurement applications. This three-channel device can accept either low level input signals directly from a transducer or high level (±10 V) signals and produce a serial digital output. It employs a sigma-delta conversion technique to realize up to 16 bits of no missing codes performance. The selected input signal is applied to a proprietary programmable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter. The first notch of this digital filter can be programmed via an on-chip control register allowing adjustment of the filter cutoff and output update rate.
AD7707BRZ 特点
- 电荷平衡ADC
- 16位无失码
- 0.003%非线性度 - 高电平（±10 V）和
低电平（±10 mV）输入通道 - 低电平输入通道上具有真双极性±100 mV能力,无需电荷泵
- 可编程增益前端,增益范围：1至128
- 三线式串行接口
- 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
- 功耗：最大1 mW（3 V）
- 待机电流：最大8 µA
- 20引脚SOIC和TSSOP封装
- Charge Balancing ADC
- 16 Bits No Missing Codes
- 0.003% Nonlinearity - High Level (±10 V) and Low Level (±10 mV) Input Channels
- True Bipolar ±100 mV Capability on Low Level Input Channels Without Requiring Charge Pumps
- Programmable Gain Front End Gains from 1 to 128
- Three-Wire Serial Interface
- SPI®, QSPI™, MICROWIRE™ and DSP Compatible
- Schmitt Trigger Input on SCLK - Ability to Buffer the Analog Input
- 2.7 V to 3.3 V or 4.75 V to 5.25 V Operation
- Power Dissipation 1 mW max @ 3 V
- Standby Current 8 µA max
- 20-Lead SOIC and TSSOP Packages
AD7707BRZ 功能框图
| 产品型号 | 产品状态 | 封装 | 引脚 | 温度范围 |
|---|---|---|---|---|
| AD7707BR | Prodn | 20 ld SOIC - Wide | 20 | 工业 |
| AD7707BR-REEL | Prodn | 20 ld SOIC - Wide | 20 | 工业 |
| AD7707BR-REEL7 | Prodn | 20 ld SOIC - Wide | 20 | 工业 |
| AD7707BRU | Prodn | 20 ld TSSOP | 20 | 工业 |
| AD7707BRU-REEL7 | Prodn | 20 ld TSSOP | 20 | 工业 |
| AD7707BRUZ | Prodn | 20 ld TSSOP | 20 | 工业 |
| AD7707BRUZ-REEL | Prodn | 20 ld TSSOP | 20 | 工业 |
| AD7707BRUZ-REEL7 | Prodn | 20 ld TSSOP | 20 | 工业 |
| AD7707BRZ | Prodn | 20 ld SOIC - Wide | 20 | 工业 |
| AD7707BRZ-REEL | Prodn | 20 ld SOIC - Wide | 20 | 工业 |
| AD7707BRZ-REEL7 | Prodn | 20 ld SOIC - Wide | 20 | 工业 |
| EVAL-AD7707EB | Prodn | EVALUATION BOARDS | - | TBD |
AD7707BRZ 应用技术支持与电子电路设计开发资源下载
- AD7707 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
