SLYS022 June   2020 INA228-Q1

ADVANCE INFORMATION for pre-production products; subject to change without notice.  

  1. 1 Features
  2. 2 Applications
    1.     Simplified Block Diagram
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1      Absolute Maximum Ratings
    2. 6.2      ESD Ratings
    3. 6.3      Recommended Operating Conditions
    4. 6.4      Thermal Information
    5. 6.5      Electrical Characteristics
    6. Table 1. Timing Requirements (I2C)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 High Voltage Input
      2. 7.3.2 Input Range
      3. 7.3.3 High-Precision Delta-Sigma ADC
        1. 7.3.3.1 Low Latency Digital Filter
        2. 7.3.3.2 ADC Output Data Rate and Noise Performance
      4. 7.3.4 Current Calculation
      5. 7.3.5 Power, Energy, and Charge Accumulation
      6. 7.3.6 Temperature Measurement and Correction
      7. 7.3.7 Clock Source
      8. 7.3.8 Multi-Alert Monitoring System
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Power-On Reset
    5. 7.5 Programming
      1. 7.5.1 I2C Serial Interface
        1. 7.5.1.1 Writing to and Reading Through the I2C Serial Interface
        2. 7.5.1.2 High-Speed I2C Mode
    6. 7.6 Register Maps
      1. 7.6.1 INA228-Q1 Registers
        1. 7.6.1.1  Configuration (CONFIG_1) Register (Offset = 0h) [reset = 0h]
          1. Table 8. CONFIG_1 Register Field Descriptions
        2. 7.6.1.2  ADC Configuration (ADCCONFIG_2) Register (Offset = 1h) [reset = FB68h]
          1. Table 9. ADCCONFIG_2 Register Field Descriptions
        3. 7.6.1.3  Shunt Calibration (CURRLSBCALC_3) Register (Offset = 2h) [reset = 1000h]
          1. Table 10. CURRLSBCALC_3 Register Field Descriptions
        4. 7.6.1.4  Shunt Temperature Coefficient (TEMPCOCONFIG_4) Register (Offset = 3h) [reset = 0h]
          1. Table 11. TEMPCOCONFIG_4 Register Field Descriptions
        5. 7.6.1.5  Shunt Voltage Measurement (VSHUNT) Register (Offset = 4h) [reset = 0h]
          1. Table 12. VSHUNT Register Field Descriptions
        6. 7.6.1.6  Bus Voltage Measurement (VBUS) Register (Offset = 5h) [reset = 0h]
          1. Table 13. VBUS Register Field Descriptions
        7. 7.6.1.7  Temperature Measurement (DIETEMP) Register (Offset = 6h) [reset = 0h]
          1. Table 14. DIETEMP Register Field Descriptions
        8. 7.6.1.8  Current Result (CURRENT) Register (Offset = 7h) [reset = 0h]
          1. Table 15. CURRENT Register Field Descriptions
        9. 7.6.1.9  Power Result (POWER) Register (Offset = 8h) [reset = 0h]
          1. Table 16. POWER Register Field Descriptions
        10. 7.6.1.10 Energy Result (ENERGY) Register (Offset = 9h) [reset = 0h]
          1. Table 17. ENERGY Register Field Descriptions
        11. 7.6.1.11 Charge Result (CHARGE) Register (Offset = Ah) [reset = 0h]
          1. Table 18. CHARGE Register Field Descriptions
        12. 7.6.1.12 Diagnostic Flags and Alert (DIAG_ALRT) Register (Offset = Bh) [reset = 0001h]
          1. Table 19. DIAG_ALRT Register Field Descriptions
        13. 7.6.1.13 Shunt Overvoltage Threshold (SOVL) Register (Offset = Ch) [reset = 7FFFh]
          1. Table 20. SOVL Register Field Descriptions
        14. 7.6.1.14 Shunt Undervoltage Threshold (SUVL) Register (Offset = Dh) [reset = 8000h]
          1. Table 21. SUVL Register Field Descriptions
        15. 7.6.1.15 Bus Overvoltage Threshold (BOVL) Register (Offset = Eh) [reset = 7FFFh]
          1. Table 22. BOVL Register Field Descriptions
        16. 7.6.1.16 Bus Undervoltage Threshold (BUVL) Register (Offset = Fh) [reset = 0h]
          1. Table 23. BUVL Register Field Descriptions
        17. 7.6.1.17 Temperature Over-Limit Threshold (TEMP_LIMIT) Register (Offset = 10h) [reset = 7FFFh]
          1. Table 24. TEMP_LIMIT Register Field Descriptions
        18. 7.6.1.18 Power Over-Limit Threshold (PWR_LIMIT) Register (Offset = 11h) [reset = FFFFh]
          1. Table 25. PWR_LIMIT Register Field Descriptions
        19. 7.6.1.19 Manufacturer ID (MANUFACTURER_ID) Register (Offset = 3Eh) [reset = 5449h]
          1. Table 26. MANUFACTURER_ID Register Field Descriptions
        20. 7.6.1.20 Device ID (DEVICE_ID) Register (Offset = 3Fh) [reset = 2280h]
          1. Table 27. DEVICE_ID Register Field Descriptions
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Filtering Considerations
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • High-resolution, 20-bit delta-sigma ADC
  • Wide common-mode range: –0.3 V to +85 V
  • Shunt full-scale differential range:
    ±163.84 mV / ± 40.96 mV
  • Bus voltage sense input: 0 V to 85 V
  • Accuracy
    • Offset voltage at 48 VCM: ±2 µV (maximum)
    • Offset voltage at 0 VCM: ±2 µV (maximum)
    • Offset drift: ±0.01 µV/°C (maximum)
    • Gain error: ±0.1% (maximum)
    • Gain error drift: ±20 ppm/ °C (maximum)
    • Shunt voltage resolution:
      312.5 nV/LSB / 78.125 nV/LSB
    • Bus voltage resolution: 195.31 µV/LSB
  • Input bias current: 5 nA (maximum)
  • Internal temperature sensor: ±2 °C (maximum)
  • Internal precision oscillator: ±1% (maximum)
  • Programmable data rate and averaging
  • Reports current, bus voltage, power, internal temperature, energy and charge
  • High-side and low-side applications
  • 3-MHz High-Speed I2C interface with 16 pin-selectable addresses
  • Operates from a 2.7-V to 5.5-V supply
    • Operational current: 660 µA
    • Shutdown current: 5 µA