AD7789 24-Bit, Single-Channel, Ultra Low Power, Sigma-Delta A/D Converter

The AD7788/AD7789 are low power, low noise, analog front ends for low frequency measurement applications. The AD7789 contains a low noise, 24-bit, ∑-∆ analog-to-digital converter (ADC) with one differential input. The AD7788 is a 16-bit version of the AD7789.

The devices operate from an internal clock. Therefore, the user does not have to supply a clock source to the devices. The output data rate is 16.6 Hz, which gives simultaneous 50 Hz/60 Hz rejection.

The devices operate with a single power supply from 2.5 V to 5.25 V. When operating from a 3 V supply, the power dissipation for the device is 225 µW maximum. The AD7788/AD7789 are available in a 10-lead MSOP.

Applications

Features and Benefits
  • 24-bit resolution
  • Power
    • Supply: 2.5 V to 5.25 V operation
    • Normal: 75 µA maximum
    • Power-down: 1 µA maximum
  • Supply: 2.5 V to 5.25 V operation
  • Normal: 75 µA maximum
  • Power-down: 1 µA maximum
  • RMS noise: 1.5 µV
  • 19-bit p-p resolution (21.5 bits effective)
  • Integral nonlinearity: 3.5 ppm typical
  • Simultaneous 50 Hz and 60 Hz rejection
  • Internal clock oscillator
  • VDD monitor channel
  • 10-lead MSOP
    • Analog to Digital Converters
    Data Sheets
    Documentnote
    AD7788/AD7789: Low Power, 16-/24-Bit, Sigma-Delta ADCs Data Sheet (Rev. C)PDF 339.17 K
    Application Notes
    Documentnote
    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-968: Current Sources: Options and Circuits (Rev. 0)PDF 131 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-397: Electrically Induced Damage to Standard Linear Integrated Circuits:PDF 149 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD7789BRM Production10 ld MSOPOTH 50-40 to 105C00N
    AD7789BRMZ Production10 ld MSOPOTH 50-40 to 105C3.512.99Y
    AD7789BRMZ-REEL Production10 ld MSOPREEL 3000-40 to 105C02.99Y
    Reference Materials
    AD7788/AD7789: Low Power, 16-/24-Bit, Sigma-Delta ADCs Data Sheet (Rev. C) ad7788
    AN-202: An IC Amplifier User’s Guide to Decoupling, Grounding, and Making Things Go Right for a Change (Rev. B) 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-202: IC放大器用户指南：去耦、接地及其他一些要点 (Rev. 0) ad8021
    AN-968: 电流源：方案与电路 (Rev. 0) ad7783
    AN-968: Current Sources: Options and Circuits (Rev. 0) ad7783
    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-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
    MS-2210：高速ADC的电源设计 ad9861
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