SBOSAK9A May   2025  – October 2025 INA745A-Q1 , INA745B-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 Integrated Shunt Resistor
      2. 6.3.2 Safe Operating Area
      3. 6.3.3 Versatile Measurement Capability
      4. 6.3.4 Internal Measurement and Calculation Engine
      5. 6.3.5 High-Precision Delta-Sigma ADC
        1. 6.3.5.1 Low Latency Digital Filter
        2. 6.3.5.2 Flexible Conversion Times and Averaging
      6. 6.3.6 Integrated Precision Oscillator
      7. 6.3.7 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
  8. 7 Register Maps
    1. 7.1 INA745x-Q1 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Device Measurement Range and Resolution
      2. 8.1.2 ADC Output Data Rate and Noise Performance
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Configure the Device
        2. 8.2.2.2 Set Desired Fault Thresholds
        3. 8.2.2.3 Calculate Returned Values
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    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 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

5.8 Typical Characteristics

at TA = 25°C, VVS = 3.3V, VCM = 12V, VSENSE = 0, and VVBUS = 12V (unless otherwise noted)

INA745A-Q1 INA745B-Q1 Shunt Input Offset Current Production Distribution
Figure 5-2 Shunt Input Offset Current Production Distribution
INA745A-Q1 INA745B-Q1 Common-Mode Rejection Ratio Production Distribution
Figure 5-4 Common-Mode Rejection Ratio Production Distribution
INA745A-Q1 INA745B-Q1 Current Gain Error Production Distribution
VCM = 24V A devices
Figure 5-6 Current Gain Error Production Distribution
INA745A-Q1 INA745B-Q1 Current Gain Error vs Common-Mode Voltage
Figure 5-8 Current Gain Error vs Common-Mode Voltage
INA745A-Q1 INA745B-Q1 Bus Input Offset Voltage vs Temperature
VVBUS = 20mV
Figure 5-10 Bus Input Offset Voltage vs Temperature
INA745A-Q1 INA745B-Q1 Bus Input Gain Error vs Temperature
Figure 5-12 Bus Input Gain Error vs Temperature
INA745A-Q1 INA745B-Q1 Input Bias Current vs Temperature
Figure 5-14 Input Bias Current vs Temperature
INA745A-Q1 INA745B-Q1 Active IQ vs Temperature
Figure 5-16 Active IQ vs Temperature
INA745A-Q1 INA745B-Q1 Shutdown IQ vs Supply Voltage
Figure 5-18 Shutdown IQ vs Supply Voltage
INA745A-Q1 INA745B-Q1 Active IQ vs Clock Frequency
Figure 5-20 Active IQ vs Clock Frequency
INA745A-Q1 INA745B-Q1 Internal Clock Frequency vs Power Supply
Figure 5-22 Internal Clock Frequency vs Power Supply
INA745A-Q1 INA745B-Q1 Input Offset Current vs Temperature
Figure 5-3 Input Offset Current vs Temperature
INA745A-Q1 INA745B-Q1 Current Common-Mode Rejection Ratio vs Temperature
Figure 5-5 Current Common-Mode Rejection Ratio vs Temperature
INA745A-Q1 INA745B-Q1 Current Gain Error vs Temperature
VCM = 24V
Figure 5-7 Current Gain Error vs Temperature
INA745A-Q1 INA745B-Q1 Bus Input Offset Voltage Production Distribution
VVBUS = 20mV
Figure 5-9 Bus Input Offset Voltage Production Distribution
INA745A-Q1 INA745B-Q1 Bus Input Gain Error Production Distribution
Figure 5-11 Bus Input Gain Error Production Distribution
INA745A-Q1 INA745B-Q1 Input Bias Current (IB+ or IB–) vs Common-Mode Voltage
Figure 5-13 Input Bias Current (IB+ or IB–) vs Common-Mode Voltage
INA745A-Q1 INA745B-Q1 Input Bias Current vs Temperature, Shutdown
Figure 5-15 Input Bias Current vs Temperature, Shutdown
INA745A-Q1 INA745B-Q1 Active IQ vs Supply Voltage
Figure 5-17 Active IQ vs Supply Voltage
INA745A-Q1 INA745B-Q1 Shutdown IQ vs Temperature
Figure 5-19 Shutdown IQ vs Temperature
INA745A-Q1 INA745B-Q1 Shutdown IQ vs Clock Frequency
Figure 5-21 Shutdown IQ vs Clock Frequency
INA745A-Q1 INA745B-Q1 Internal Clock Frequency vs Temperature
Figure 5-23 Internal Clock Frequency vs Temperature