AD7709 16-Bit Sigma Delta ADC with Current Sources, Switchable Reference Inputs and I/O Port

The AD7709 is a complete analog front-end for low frequency measurement applications. The AD7709 contains a 16-bit sigma delta ADC with PGA and can be configured as 2 fully-differential input channels or 4 pseudo-differential input channels. Inputs signal ranges from 20mV to 2.56V can be directly converted using the AD7709. These signals can be converted directly from a transducer without the need for signal conditioning. Other on-chip features include three software configurable current sources, switchable reference inputs, low side power switches and a 4-bit digital I/O port.

Features and Benefits
  • 16-Bit Σ-Δ ADC
  • Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz Update Rate
  • VREF Select ™ Allows Absolute and Ratiometric Measurement Capability
  • Programmable Gain Front End
  • ISOURCE Select ™
  • 16-Bit No Missing Codes
  • 13-Bit p-p Resolution @ 20 Hz, 20 mV Range
  • 16-Bit p-p Resolution @ 20 Hz, 2.56 V Range
Analog to Digital Converters
Data Sheets
Documentnote
AD7709: 16-Bit Sigma Delta ADC with Switchable Current Sources Data Sheet (Rev. A)PDF 422 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
AD7709ARUZ Production24 ld TSSOPOTH 62-40 to 85C4.633.94Y
AD7709ARUZ-REEL7 Production24 ld TSSOPREEL 1000-40 to 85C03.94Y
AD7709BRU Last Time Buy24 ld TSSOPOTH 62-40 to 85C00N
AD7709BRUZ Production24 ld TSSOPOTH 62-40 to 85C5.314.51Y
AD7709BRUZ-REEL Production24 ld TSSOPREEL 2500-40 to 85C04.51Y
AD7709BRUZ-REEL7 Production24 ld TSSOPREEL 1000-40 to 85C04.51Y
Reference Materials
AD7709: 16-Bit Sigma Delta ADC with Switchable Current Sources Data Sheet (Rev. A) ad7709
AD7709参考代码 ad7709
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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