AD7718 24-Bit, 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC

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.

Features and Benefits
  • 8-/10-Channel, High Resolution Σ-Δ ADCs
  • 24-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) or - Channel Throughput (CHOP = 1)
    • Analog to Digital Converters
    AD7718 IBIS Model
    Software & Systems Requirements
    Data Sheets
    Documentnote
    AD7708/AD7718: 16-Bit 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC Data Sheet (Rev. 0)PDF 328 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-347: Shielding and GuardingPDF 688 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-665: Channel Switching Using Σ-Δ ADCs (Rev. 0)PDF 84 kB
    AN-101: Cross Plot Generator Allows Quick A/D Converter EvaluationPDF 280 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
    AD7718BRU Production28 ld TSSOP (4.4mm)OTH 50-40 to 85C7.26.12N
    AD7718BRUZ Production28 ld TSSOP (4.4mm)OTH 50-40 to 85C6.235.3Y
    AD7718BRUZ-REEL7 Production28 ld TSSOP (4.4mm)REEL 1000-40 to 85C05.3Y
    AD7718BRZ Production28 ld SOIC - WideOTH 27-40 to 85C6.235.3Y
    AD7718BRZ-REEL Production28 ld SOIC - WideREEL 1000-40 to 85C05.3Y
    AD7718BRZ-REEL7 Production28 ld SOIC - WideREEL 400-40 to 85C05.3Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-AD7718EBZEvaluation Board59Y
    Reference Materials
    AD7708/AD7718: 16-Bit 8/10-Channel, Low Voltage, Low Power, Sigma Delta ADC Data Sheet (Rev. 0) ad7708
    AD7718BRUZ ad7718
    AD7718BRZ ad7718
    AD7718参考代码 ad7718
    AD7718 Software ad7718
    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-347: Shielding and Guarding ad677
    AN-397: 标准线性集成电路的电诱发损坏 (Rev. 0) ad7715
    AN-101: 交会图发生器加快模数转换器评估 (Rev. 0) ad677
    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-665: Σ-Δ ADC的通道切换 (Rev. 0) ad7708
    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-665: Channel Switching Using Σ-Δ ADCs (Rev. 0) ad7708
    AN-101: Cross Plot Generator Allows Quick A/D Converter Evaluation ad677
    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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