AD7719 Low Voltage, Low Power, 16-/24-Bit, Dual Sigma Delta ADC

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.

Features and Benefits
  • 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
  • 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
  • 3-Wire Serial
  • SPI®, QSPI™, MICROWIRE™, and DSP Compatible
  • Schmitt Trigger on SCLK
    • Analog to Digital Converters
    Software & Systems Requirements
    Data Sheets
    Documentnote
    AD7719: Low Voltage, Low Power, Factory-Calibrated 16-/24- Bit Dual Σ-Δ ADC Data Sheet (Rev. A)PDF 509 kB
    Application Notes
    Documentnote
    AN-610: The PGA on Sigma-Delta ADCs (Rev. A)PDF 152 kB
    AN-609: Chopping on Sigma-Delta ADCs (Rev. 0)PDF 232 kB
    AN-608: Input Buffers on Sigma-Delta ADCs (Rev. 0)PDF 284 kB
    AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev. B)PDF 76.97 K
    AN-389: Using Sigma-Delta Converters-Part 2PDF 590 kB
    AN-388: Using Sigma-Delta Converters-Part 1PDF 590 kB
    AN-311: How to Reliably Protect CMOS Circuits Against Power Supply OvervoltagingPDF 217 kB
    AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC (Rev. E)PDF 222 kB
    AN-615: Peak-to-Peak Resolution Versus Effective Resolution (Rev. 0)PDF 70 kB
    AN-611: 50 Hz/60Hz Rejection on Sigma-Delta ADCs (Rev. 0)PDF 360 kB
    AN-397: Electrically Induced Damage to Standard Linear Integrated Circuits:PDF 149 kB
    AN-283: Sigma-Delta ADCs and DACsPDF 1699 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD7719BRUZ Production28 ld TSSOP (4.4mm)OTH 50-40 to 85C12.8710.82Y
    AD7719BRUZ-REEL7 Production28 ld TSSOP (4.4mm)REEL 1000-40 to 85C010.82Y
    AD7719BRZ Production28 ld SOIC - WideOTH 27-40 to 85C12.8710.82Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-AD7719EBZEvaluation Board59Y
    Reference Materials
    AD7719: Low Voltage, Low Power, Factory-Calibrated 16-/24- Bit Dual Σ-Δ ADC Data Sheet (Rev. A) ad7719
    AD7718参考代码 ad7718
    AD7719 Software ad7719
    AN-610: The PGA on Sigma-Delta ADCs (Rev. A) ad7783
    AN-609: Chopping on Sigma-Delta ADCs (Rev. 0) ad7783
    AN-608: Input Buffers on Sigma-Delta ADCs (Rev. 0) ad7783
    AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev. B) ad7715
    AN-389: Using Sigma-Delta Converters-Part 2 ad7715
    AN-388: Using Sigma-Delta Converters-Part 1 ad7715
    AN-397: 标准线性集成电路的电诱发损坏 (Rev. 0) ad7715
    AN-615: 峰峰值分辨率与有效分辨率 (Rev. 0) ad7715
    AN-607: 选择低带宽(<15kSPS)Σ-Δ型ADC (Rev. E) ad7701
    AN-609: Σ-Δ ADC上的斩波 (Rev. 0) ad7783
    AN-202: IC放大器用户指南：去耦、接地及其他一些要点 (Rev. 0) ad8021
    AN-311: How to Reliably Protect CMOS Circuits Against Power Supply Overvoltaging ad1674
    AN-607: Selecting a Low Bandwidth (<15 kSPS) Sigma-Delta ADC (Rev. E) ad7701
    AN-615: Peak-to-Peak Resolution Versus Effective Resolution (Rev. 0) ad7715
    AN-611: Σ-Δ ADC上的50 Hz/60 Hz干扰抑制 (Rev. 0) ad7783
    AN-611: 50 Hz/60Hz Rejection on Sigma-Delta ADCs (Rev. 0) ad7783
    AN-610: Σ-Δ型ADC上的PGA (Rev. A) ad7783
    AN-608: Σ-Δ ADC上的输入缓冲器 (Rev. 0) ad7783
    AN-397: Electrically Induced Damage to Standard Linear Integrated Circuits: ad7715
    AN-311: 如何切实有效地保护CMOS电路不受电源过压影响 (Rev. 0) adg406
    AN-389: 使用Σ-Δ转换器—第二部分[中文版] (Rev. 0) ad7715
    AN-388: 使用Σ-Δ转换器—第一部分[中文版] (Rev. 0) ad7715
    AN-283: Σ-Δ型ADC和DAC[中文版] (Rev. 0) ad74111
    AN-283: Sigma-Delta ADCs and DACs ad7715
    MS-2210：高速ADC的电源设计 ad9861
    Part 2: Circuit Suggestions Using Features and Functionality of New Sigma-Delta ad7715
    Part 1: Circuit Suggestions Using Features and Functionality of New Sigma-Delta ad7715
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