SNVS829F March   1999  – May 2026 LMP8480 , LMP8481

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Theory of Operation
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1  Basic Connections
      2. 7.3.2  Selection of the Sense Resistor
      3. 7.3.3  Using PCB Traces as Sense Resistors
      4. 7.3.4  VREFA and VREFB Pins (LMP8481 Only)
        1. 7.3.4.1 One-to-One (1:1) Reference Input
        2. 7.3.4.2 Setting Output to One-Half VCC or external VREF
      5. 7.3.5  Reference Input Voltage Limits (LMP8481 Only)
      6. 7.3.6  Low-Side Current Sensing
      7. 7.3.7  Input Series Resistance
      8. 7.3.8  Minimum Output Voltage
      9. 7.3.9  Swinging Output Below Ground
      10. 7.3.10 Maximum Output Voltage
    4. 7.4 Device Functional Modes
      1. 7.4.1 Unidirectional vs Bidirectional Operation
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Input Common-Mode and Differential Voltage Range
    2. 8.2 Typical Applications
      1. 8.2.1 Unidirectional Application With the LMP8480
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Bidirectional Current Sensing Using the LMP8481
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
      3. 8.2.3 Typical Application With a Resistive Divider
  10. 9 Power Supply Recommendations
    1. 9.1 Power Supply Decoupling
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

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

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)(2)(3)
MIN MAX UNIT
Supply voltage (VCC to GND) –0.3 85 V
RSP or RSN to GND –0.3 85 V
VOUT to GND –0.3 to the lesser of (VCC + 0.3) or +20 V
VREF pins
(LMP8481 only)		 Other VREF pin tied to ground –0.3 12 V
Applied to both VREF pins tied together –0.3 6
Differential input voltage –85 85 V
Current into output pin –20(4) 20 mA
Current into any other pins –5(4) 5 mA
Operating temperature –40 125 °C
Junction temperature -40 150 °C
Storage temperature –65 150 °C
(1) The maximum power dissipation must be derated at elevated temperatures and is dictated by TJ(MAX), θJA, and the ambient temperature, TA. The maximum allowable power dissipation PDMAX = (TJ(MAX) –TA)/ θJA or the number given in Absolute Maximum Ratings, whichever is lower.
(2) If Military/Aerospace specified devices are required, contact the Texas Instruments Sales Office/Distributors for availability and specifications.
(3) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(4) When the input voltage (VIN) at any pin exceeds power supplies (VIN < GND or VIN > VS ), the current at that pin must not exceed 5 mA, and the voltage (VIN) has to be within the Absolute Maximum Ratings for that pin. The 20-mA package input current rating limits the number of pins that can safely exceed the power supplies with current flow to four pins.