SBOSA30C March   2022  – October 2023 INA241A , INA241B

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Amplifier Input Common-Mode Signal
        1. 8.3.1.1 Enhanced PWM Rejection Operation
        2. 8.3.1.2 Input-Signal Bandwidth
        3. 8.3.1.3 Low Input Bias Current
        4. 8.3.1.4 Low VSENSE Operation
        5. 8.3.1.5 Wide Fixed Gain Output
        6. 8.3.1.6 Wide Supply Range
    4. 8.4 Device Functional Modes
      1. 8.4.1 Adjusting the Output With the Reference Pins
      2. 8.4.2 Reference Pin Connections for Unidirectional Current Measurements
        1. 8.4.2.1 Ground Referenced Output
        2. 8.4.2.2 VS Referenced Output
      3. 8.4.3 Reference Pin Connections for Bidirectional Current Measurements
        1. 8.4.3.1 Output Set to External Reference Voltage
        2. 8.4.3.2 Output Set to Mid-Supply Voltage
        3. 8.4.3.3 Output Set to Mid-External Reference
        4. 8.4.3.4 Output Set Using Resistor Divider
      4. 8.4.4 High Signal Throughput
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 RSENSE and Device Gain Selection
    2. 9.2 Typical Application
      1. 9.2.1 Inline Motor Current-Sense Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Power Supply Decoupling
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Examples
  11. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

6 Pin Configuration and Functions

GUID-69580376-9D9A-49D7-A591-CEDD73F9CB78-low.svgFigure 6-1 INA241x: DDF Package8-Pin SOT-23Top View
GUID-4DF9DA89-9F81-41AD-97A4-742E413BFFD4-low.svgFigure 6-2 INA241x: D and DGK Package8-Pin SOIC and 8-Pin VSSOPTop View
Table 6-1 Pin Functions: D, DDF and DGK Packages
PIN TYPE DESCRIPTION
NAME NO.
GND 2 Ground Ground
IN+ 8 Input Current-sense amplifier positive input. For high-side applications, connect to bus-voltage side of sense resistor. For low-side applications, connect to load side of sense resistor.
IN– 1 Input Current-sense amplifier negative input. For high-side applications, connect to load side of sense resistor. For low-side applications, connect to ground side of sense resistor.
NC 4 Ground Reserved. Connect to ground.
OUT 5 Output Output voltage
REF1 7 Input Reference 1 voltage. Connect to voltage potential from 0 V to VS; see Adjusting the Output With the Reference Pins for connection options.
REF2 3 Input Reference 2 voltage. Connect to voltage potential from 0 V to VS; see Adjusting the Output With the Reference Pins for connection options.
VS 6 Power Power supply, 2.7 V to 20 V
GUID-20221027-SS0I-WGT6-WM8B-CF6NJ7WKB1QL-low.svg
Note: The DGS (VSSOP) package is preview only.
Figure 6-3 INA241x: DGS Package10-Pin VSSOPTop View
Table 6-2 Pin Functions: DGS Package
PIN TYPE DESCRIPTION
NAME NO.
GND 3 Ground Ground
IN+ 10 Input Current-sense amplifier positive input. For high-side applications, connect to bus-voltage side of sense resistor. For low-side applications, connect to load side of sense resistor.
IN– 1 Input Current-sense amplifier negative input. For high-side applications, connect to load side of sense resistor. For low-side applications, connect to ground side of sense resistor.
NC 5 Ground Reserved. Connect to ground.
NC 2 – Leave unconnected
NC 9 – Leave unconnected
OUT 6 Output Output voltage
REF1 8 Input Reference 1 voltage. Connect to voltage potential from 0 V to VS; see Adjusting the Output With the Reference Pins for connection options.
REF2 4 Input Reference 2 voltage. Connect to voltage potential from 0 V to VS; see Adjusting the Output With the Reference Pins for connection options.
VS 7 Power Power supply, 2.7 V to 20 V