AD7708:  16位、8或10通道、低电压、低功耗Σ-Δ ADC

AD7708/AD7718是用于低频测量应用的完整模拟前端器件,内置一个带有可编程增益放大器(PGA)的24位、Σ-Δ ADC,可配置为4/5全差分输入通道或8/10伪差分输入通道,该器件上的两个引脚可配置为模拟输入或基准电压输入。AD7708是AD7718的16位版本。利用这些ADC,可直接转换从20mV到2.56V范围内的输入信号,支持传感器信号直接输入,而无需进行信号调理。

The AD7708/18 are complete analog front-ends for low frequency measurement applications. The AD7718 contains a 24-bit sigma delta ADC with PGA and can be configured as 4/5 fully-differential input channels or 8/10 pseudo-differential input channels. Two pins on the device are configurable as analog inputs or reference inputs. The AD7708 is a 16-bit version of the AD7718. Inputs signal ranges from 20mV to 2.56V can be directly converted using these ADCs. Signals can be converted directly from a transducer without the need for signal conditioning.

技术特性
  • 8/10通道、高分辨率Σ-Δ ADC
  • 16位分辨率
  • 出厂校准
  • 单转换周期设置
  • 可编程增益前端
  • 50 Hz、60 Hz同时抑制
  • VREF Select ™ 提供绝对测量和比率测量能力
  • 可针对模拟性能(CHOP = 0)或通道吞吐量(CHOP= 1)优化操作
  • 8-/10-Channel, High Resolution Σ-Δ ADCs
  • 16-Bit Resolution
  • Factory-Calibrated
  • Single Conversion Cycle Setting
  • Programmable Gain Front End
  • Simultaneous 50 Hz and 60 Hz Rejection
  • VREF Select ™ Allows Absolute and Ratiometric Measurement Capability
  • Operation Can Be Optimized for Analog Performance (CHOP = 0) orChannel Throughput (CHOP= 1)
技术指标
  • Resolution (Bits): 16bit
  • # Chan: 10
  • Sample Rate: n/a
  • Interface: Ser,SPI
  • Analog Input Type: Diff-Uni,SE-Uni
  • Ain Range: (2Vref/PGA Gain) p-p
  • ADC Architecture: Sigma-Delta
  • Pkg Type: SOIC,SOP
功能框图

AD7708 功能框图

建议配套产品
  • Recommended Voltage References for the AD7708
    • For precision 2.5V applications with AVdd = 5V, we recommend AD780, REF43 or the REF192.
    • For precision 1.2V applications with AVdd = 3V, we recommend the AD589, AD1580 or the ADR512.
  • Recommended Digital Isolators for the AD7708
    • For process control applications, we recommend the ADuM1400 and the ADuM1200 icoupler.
    • For cost sensitive designs, we recommend the ADuM7440, ADuM7441 or ADuM7442.
    • For digital isolators with integrated isolated power, we suggest the ADuM5401, ADuM5402 or the ADuM5403.
    • For isolated USB designs in healthcare and industrial control, we recommend the ADuM4160.
  • Recommended Power Solutions
    • For selecting voltage regulator products, use ADIsimPower.
    • For selecting supervisor products, use the Supervisor Parametric Search.
订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7708BR Prodn 28 ld SOIC - Wide 28 工业
AD7708BR-REEL Prodn 28 ld SOIC - Wide 28 工业
AD7708BR-REEL7 Prodn 28 ld SOIC - Wide 28 工业
AD7708BRU Prodn 28 ld TSSOP 28 工业
AD7708BRU-REEL Prodn 28 ld TSSOP 28 工业
AD7708BRU-REEL7 Prodn 28 ld TSSOP 28 工业
AD7708BRUZ Prodn 28 ld TSSOP 28 工业
AD7708BRUZ-REEL Prodn 28 ld TSSOP 28 工业
AD7708BRUZ-REEL7 Prodn 28 ld TSSOP 28 工业
AD7708BRZ Prodn 28 ld SOIC - Wide 28 工业
AD7708BRZ-REEL Prodn 28 ld SOIC - Wide 28 工业
AD7708BRZ-REEL7 Prodn 28 ld SOIC - Wide 28 工业
EVAL-AD7708EBZ Prodn EVALUATION BOARDS - TBD
AD7708 应用技术支持与电子电路设计开发资源下载
  1. AD7708 数据手册DataSheet下载 .pdf
  2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
  3. ADC模数转换器选型指南 . pdf