SBAS705B June   2015  – April 2020 ADS131E08S

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
    1.     Power Application: Three-Phase Voltage and Current Connection
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Noise Measurements
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  Electromagnetic Interference (EMI) Filter
      2. 9.3.2  Input Multiplexer
        1. 9.3.2.1 Device Noise Measurements
        2. 9.3.2.2 Test Signals (TestP and TestN)
        3. 9.3.2.3 Temperature Sensor (TempP, TempN)
        4. 9.3.2.4 Power-Supply Measurements (MVDDP, MVDDN)
      3. 9.3.3  Analog Input
      4. 9.3.4  PGA Settings and Input Range
        1. 9.3.4.1 Input Common-Mode Range
      5. 9.3.5  ΔΣ Modulator
      6. 9.3.6  Clock
      7. 9.3.7  Digital Decimation Filter
      8. 9.3.8  Voltage Reference
      9. 9.3.9  Input Out-of-Range Detection
      10. 9.3.10 General-Purpose Digital I/O (GPIO)
    4. 9.4 Device Functional Modes
      1. 9.4.1 Power-Down
      2. 9.4.2 Reset
      3. 9.4.3 Conversion Mode
        1. 9.4.3.1 START Pin Low-to-High Transition or START Command Sent
        2. 9.4.3.2 Input Signal Step
        3. 9.4.3.3 Continuous Conversion Mode
    5. 9.5 Programming
      1. 9.5.1 SPI Interface
        1. 9.5.1.1 Chip Select (CS)
        2. 9.5.1.2 Serial Clock (SCLK)
        3. 9.5.1.3 Data Input (DIN)
        4. 9.5.1.4 Data Output (DOUT)
        5. 9.5.1.5 Data Ready (DRDY)
      2. 9.5.2 Data Retrieval
        1. 9.5.2.1 Status Word
        2. 9.5.2.2 Readback Length
        3. 9.5.2.3 Data Format
      3. 9.5.3 SPI Command Definitions
        1. 9.5.3.1  WAKEUP: Exit STANDBY Mode
        2. 9.5.3.2  STANDBY: Enter STANDBY Mode
        3. 9.5.3.3  RESET: Reset Registers to Default Values
        4. 9.5.3.4  START: Start Conversions
        5. 9.5.3.5  STOP: Stop Conversions
        6. 9.5.3.6  OFFSETCAL: Channel Offset Calibration
        7. 9.5.3.7  RDATAC: Start Read Data Continuous Mode
        8. 9.5.3.8  SDATAC: Stop Read Data Continuous Mode
        9. 9.5.3.9  RDATA: Read Data
        10. 9.5.3.10 RREG: Read from Register
        11. 9.5.3.11 WREG: Write to Register
        12. 9.5.3.12 Sending Multibyte Commands
    6. 9.6 Register Map
      1. 9.6.1 Register Descriptions
        1. 9.6.1.1 ID: ID Control Register (Factory-Programmed, Read-Only) (address = 00h) [reset = D2h]
          1. Table 11. ID: ID Control Register Field Descriptions
        2. 9.6.1.2 CONFIG1: Configuration Register 1 (address = 01h) [reset = 94h]
          1. Table 12. CONFIG1: Configuration Register 1 Field Descriptions
        3. 9.6.1.3 CONFIG2: Configuration Register 2 (address = 02h) [reset = 00h]
          1. Table 14. CONFIG2: Configuration Register 2 Field Descriptions
        4. 9.6.1.4 CONFIG3: Configuration Register 3 (address = 03h) [reset = E0h]
          1. Table 15. CONFIG3: Configuration Register 3 Field Descriptions
        5. 9.6.1.5 FAULT: Fault Detect Control Register (address = 04h) [reset = 00h]
          1. Table 16. FAULT: Fault Detect Control Register Field Descriptions
        6. 9.6.1.6 CHnSET: Individual Channel Settings (address = 05h to 0Ch) [reset = 10h]
          1. Table 17. CHnSET: Individual Channel Settings Field Descriptions
        7. 9.6.1.7 FAULT_STATP: Fault Detect Positive Input Status (address = 12h) [reset = 00h]
          1. Table 18. FAULT_STATP: Fault Detect Positive Input Status Field Descriptions
        8. 9.6.1.8 FAULT_STATN: Fault Detect Negative Input Status (address = 13h) [reset = 00h]
          1. Table 19. FAULT_STATN: Fault Detect Negative Input Status Field Descriptions
        9. 9.6.1.9 GPIO: General-Purpose IO Register (address = 14h) [reset = 0Fh]
          1. Table 20. GPIO: General-Purpose IO Register Field Descriptions
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 Multiple Device Configuration
        1. 10.1.1.1 Synchronizing Multiple Devices
        2. 10.1.1.2 Standard Configuration
        3. 10.1.1.3 Daisy-Chain Configuration
      2. 10.1.2 Power Monitoring Specific Applications
      3. 10.1.3 Current Sensing
      4. 10.1.4 Voltage Sensing
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
    3. 10.3 Initialization Set Up
      1. 10.3.1 Setting the Device Up for Basic Data Capture
  11. 11Power Supply Recommendations
    1. 11.1 Power-Up Timing
    2. 11.2 Recommended External Capacitor Values
    3. 11.3 Device Connections for Unipolar Power Supplies
    4. 11.4 Device Connections for Bipolar Power Supplies
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.5.2.2 Readback Length

The number of bits in the data output depends on the number of channels and the number of bits per channel. The data format for each channel data are twos complement and MSB first.

For the ADS131E08S with 32-kSPS and 64-kSPS data rates, the number of data bits is: 24 status bits + 16 bits per channel × 8 channels = 152 bits.

For all other data rates, the number of data bits is: 24 status bits + 24 bits per channel × 8 channels = 216 bits.

When channels are powered down using the user register setting, the corresponding channel output is set to 0. However, the sequence of channel outputs remains the same.

The ADS131E08S also provides a multiple data readback feature. Data can be read out multiple times by simply providing more SCLKs, in which case the MSB data byte repeats after reading the last byte. The DAISY_IN bit in the CONFIG1 register must be set to 1 for multiple read backs.