SBOSA27B June   2020  – June 2025 INA237-Q1

PRODUCTION DATA  

  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 Timing Requirements (I2C)
    7. 5.7 Timing Diagram
    8. 5.8 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Versatile High Voltage Measurement Capability
      2. 6.3.2 Power Calculation
      3. 6.3.3 Low Bias Current
      4. 6.3.4 High-Precision Delta-Sigma ADC
        1. 6.3.4.1 Low Latency Digital Filter
        2. 6.3.4.2 Flexible Conversion Times and Averaging
      5. 6.3.5 Integrated Precision Oscillator
      6. 6.3.6 Multi-Alert Monitoring and Fault Detection
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
      2. 6.4.2 Power-On Reset
    5. 6.5 Programming
      1. 6.5.1 I2C Serial Interface
        1. 6.5.1.1 Writing to and Reading Through the I2C Serial Interface
        2. 6.5.1.2 High-Speed I2C Mode
        3. 6.5.1.3 SMBus Alert Response
    6. 6.6 Register Maps
      1. 6.6.1 INA237-Q1 Registers
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Device Measurement Range and Resolution
      2. 7.1.2 Current and Power Calculations
      3. 7.1.3 ADC Output Data Rate and Noise Performance
      4. 7.1.4 Input Filtering Considerations
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Select the Shunt Resistor
        2. 7.2.2.2 Configure the Device
        3. 7.2.2.3 Program the Shunt Calibration Register
        4. 7.2.2.4 Set Desired Fault Thresholds
        5. 7.2.2.5 Calculate Returned Values
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.8 Typical Characteristics

at TA = 25 °C, VVS = 3.3 V, VCM = 48 V, VSENSE = 0, and VVBUS = 48 V (unless otherwise noted)

INA237-Q1 Shunt Input Offset Voltage Production Distribution
VCM = 48 V
Figure 5-2 Shunt Input Offset Voltage Production Distribution
INA237-Q1 Shunt Input Offset Voltage vs Temperature
Figure 5-4 Shunt Input Offset Voltage vs Temperature
INA237-Q1 Shunt Input Common-Mode Rejection Ratio vs Temperature
Figure 5-6 Shunt Input Common-Mode Rejection Ratio vs Temperature
INA237-Q1 Shunt Input Gain Error vs Temperature
VCM = 24 V
Figure 5-8 Shunt Input Gain Error vs Temperature
INA237-Q1 Bus Input Offset Voltage Production Distribution
VVBUS = 20 mV
Figure 5-10 Bus Input Offset Voltage Production Distribution
INA237-Q1 Bus Input Gain Error Production Distribution
Figure 5-12 Bus Input Gain Error Production Distribution
INA237-Q1 Input Bias Current vs Differential Input Voltage
Figure 5-14 Input Bias Current vs Differential Input Voltage
INA237-Q1 Input Bias Current vs Temperature
Figure 5-16 Input Bias Current vs Temperature
INA237-Q1 Active IQ vs Temperature
Figure 5-18 Active IQ vs Temperature
INA237-Q1 Shutdown IQ vs Supply Voltage
Figure 5-20 Shutdown IQ vs Supply Voltage
INA237-Q1 Active IQ vs Clock Frequency
Figure 5-22 Active IQ vs Clock Frequency
INA237-Q1 Internal Clock Frequency vs Power Supply
Figure 5-24 Internal Clock Frequency vs Power Supply
INA237-Q1 Shunt Input Offset Voltage Production Distribution
VCM = 0 V
Figure 5-3 Shunt Input Offset Voltage Production Distribution
INA237-Q1 Common-Mode Rejection Ratio Production Distribution
Figure 5-5 Common-Mode Rejection Ratio Production Distribution
INA237-Q1 Shunt Input Gain Error Production Distribution
VCM = 24 V
Figure 5-7 Shunt Input Gain Error Production Distribution
INA237-Q1 Shunt Input Gain Error vs Common-Mode Voltage
Figure 5-9 Shunt Input Gain Error vs Common-Mode Voltage
INA237-Q1 Bus Input Offset Voltage vs Temperature
VVBUS = 20 mV
Figure 5-11 Bus Input Offset Voltage vs Temperature
INA237-Q1 Bus Input Gain Error vs Temperature
Figure 5-13 Bus Input Gain Error vs Temperature
INA237-Q1 Input Bias Current (IB+ or IB–) vs Common-Mode Voltage
Figure 5-15 Input Bias Current (IB+ or IB–) vs Common-Mode Voltage
INA237-Q1 Input Bias Current vs Temperature, Shutdown
Figure 5-17 Input Bias Current vs Temperature, Shutdown
INA237-Q1 Active IQ vs Supply Voltage
Figure 5-19 Active IQ vs Supply Voltage
INA237-Q1 Shutdown IQ vs Temperature
Figure 5-21 Shutdown IQ vs Temperature
INA237-Q1 Shutdown IQ vs Clock Frequency
Figure 5-23 Shutdown IQ vs Clock Frequency
INA237-Q1 Internal Clock Frequency vs Temperature
Figure 5-25 Internal Clock Frequency vs Temperature