AD7708:16位、8或10通道、低电压、低功耗Σ-Δ ADC

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

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