AD7779ACPZ-RL
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AD7779ACPZ-RL

  • Category:converter
  • Product Name:8-channel 24-bit simultaneous sampling ADC
  • Manufacturers:ADI
  • Production Batch Number:15+
  • Encapsulation:64 ld LFCSP
  • Stock Status:There is stock
  • Stock Quantity:250
  • Minimum order quantity: 1
  • Details:点击查找AD7779ACPZ-RL的pdf资料
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  • Product introduction

Advantages and features

  • 8-channel 24-bit simultaneous sampling ADC
  • 用于相干采样的采样速率转换器(SRC)
  • 可调相位同步
  • 每通道PGA(增益1、2、4、8)
  • 低输入偏置电流:1nA
  • 单端或真差分输入
  • 16ksps输出数据速率/每通道
  • 2.5V内部基准电压源
  • 优化功耗与性能
  • 两种功耗模式:
    • 高分辨率模式
    • Low-power mode
  • 低延迟Sinc3滤波器路径
  • 用于系统和芯片诊断的低分辨率SAR ADC



Product Classification

Analog-to-digital converters(ADC)

  • 同步采样ADC

    Product details

    AD7779是一款8通道同步采样Analog-to-digital converters。 片内有8个完整的Σ-Δ ADC。 AD7779提供高达10 MOhm的输入阻抗,以便直接连接传感器。 各输入通道都有一个针对增益1、2、4、8的可编程增益级,用以将低振幅传感器输出映射到满量程ADC输入范围中,使信号链的动态范围最大化。 模拟电源电压为3.3V或±1.65V时,模拟输入分别可接受单极性0至2.5V或真双极性±1.25V模拟输入信号。 可将模拟输入配置成可接受真差分或单端信号以与不同的传感器输出配置相匹配。 

    各通道包含一个ADC调制器和Sinc 3低延迟数字滤波器。 采用采样速率转换器(SRC)来对AD7779输出数据速率(ODR)进行精细分辨率控制。 这款器件可以用在电能质量应用中,其中要求ODR分辨率和0.01Hz的线路频率变化保持一致。 可以通过SPI接口对SRC进行编程。 AD7779可实现两种不同接口,数据输出接口和SPI控制接口。 ADC数据输出接口专门用于将ADC转换结果从AD7779发送至处理器。 SPI接口用以负责AD7779配置寄存器的读写并用于控制和读取SAR ADC的数据。 也可将SPI接口配置成输出Σ-Δ转换数据。 

    AD7779包括一个12位SAR ADC。 这款ADC可以用于AD7779诊断,这样就无需腾出一个Σ-Δ ADC通道专用于系统测量功能。 通过采用外部多路复用器和信号调理,在有功能安全要求的应用中可以采用SAR ADC来验证Σ-Δ ADC测量。 此外,AD7779提供有三个GPIO,可用来控制外部多路复用器。 

    AD7779包含一个2.5V基准电压源和参考缓冲器。 基准电压源的温度系数最大值为20 ppm/°C。 

    AD7779提供两种工作模式:高分辨率模式和低功耗模式。 高分辨率模式提供较高动态范围而功耗为13 mW/ch,低功耗模式通过减小动态范围,功耗仅为5 mW/ch。 

    指定工作温度范围为-40°C至+105°C,而该部分的工作温度可高达+125°C。 
  •  

andAD7779ACPZ-RLRelated ICs are:


Model Manufacturers lot number encapsulation illustrate
AD7779ACPZ-RL ADI 15+ 64 ld LFCSP 8-channel 24-bit simultaneous sampling ADC
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