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  • ADS123x 2- and 4-Channel, 24-Bit, Delta-Sigma ADCs for Bridge Sensors

    • SBAS350H June   2005  – June 2025 ADS1232 , ADS1234

      PRODUCTION DATA  

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  • ADS123x 2- and 4-Channel, 24-Bit, Delta-Sigma ADCs for Bridge Sensors
  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1 Noise Performance
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Analog Inputs (AINPX, AINNX)
      2. 7.3.2  Temperature Sensor (ADS1232 Only)
      3. 7.3.3  Low-Noise PGA
        1. 7.3.3.1 PGA Bypass Capacitor
      4. 7.3.4  Voltage Reference Inputs (REFP, REFN)
      5. 7.3.5  Clock Sources
      6. 7.3.6  Digital Filter Frequency Response
      7. 7.3.7  Settling Time
      8. 7.3.8  Data Rate
      9. 7.3.9  Data Format
      10. 7.3.10 Data Ready and Data Output (DRDY/DOUT)
      11. 7.3.11 Serial Clock Input (SCLK)
      12. 7.3.12 Data Retrieval
    4. 7.4 Device Functional Modes
      1. 7.4.1 Offset Calibration Mode
      2. 7.4.2 Standby Mode
      3. 7.4.3 Standby Mode With Offset-Calibration
      4. 7.4.4 Power-Down Mode
      5. 7.4.5 Power-Up Sequence
      6. 7.4.6 Summary of Serial Interface Waveforms
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Power-Supply Decoupling
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE
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Data Sheet

ADS123x 2- and 4-Channel, 24-Bit, Delta-Sigma ADCs for Bridge Sensors

1 Features

  • Complete front-end for bridge sensors
  • 23.5-bits effective resolution at gain = 1
  • 19.2-bits noise-free resolution at gain = 64
  • Low-noise PGA
  • Selectable gains of 1, 2, 64, and 128
  • RMS noise:
    • 17nV at 10SPS at gain = 128
    • 44nV at 80SPS at gain = 128
  • 100dB simultaneous 50Hz and 60Hz rejection
  • Flexible clocking:
    • Low-drift internal oscillator
    • Optional external crystal
  • Selectable 10SPS or 80SPS data rates
  • Easy ratiometric measurements:
    • External voltage reference up to 5V
  • Two-channel differential input with internal temperature sensor (ADS1232)
  • Four-channel differential input (ADS1234)
  • Two-wire serial interface
  • Supply voltage range: 2.7V to 5.3V
  • Temperature range: –40°C to +105°C
  • Packages: TSSOP-24 (ADS1232) or TSSOP-28 (ADS1234)

 
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