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

6.6 Typical Characteristics

unless otherwise specified, TA = 25°C, VCC = 4.5 V to 76 V, 4.5 V < VCM < 76 V, RL = 100 kΩ, VSENSE = (VRSP – VRSN) = 0 V, for all gain options

LMP8480 LMP8481 Offset Voltage HistogramFigure 6-1 Offset Voltage Histogram
LMP8480 LMP8481 Typical Gain Accuracy vs TemperatureFigure 6-3 Typical Gain Accuracy vs Temperature
LMP8480 LMP8481 Typical Offset Voltage vs Supply VoltageFigure 6-5 Typical Offset Voltage vs Supply Voltage
LMP8480 LMP8481 AC Power Supply Rejection Ratio vs FrequencyFigure 6-7 AC Power Supply Rejection Ratio vs Frequency
LMP8480 LMP8481 Large Signal Pulse ResponseFigure 6-9 Large Signal Pulse Response
LMP8480 LMP8481 Supply Current vs Supply VoltageFigure 6-11 Supply Current vs Supply Voltage
LMP8480 LMP8481 Saturated Output Sourcing Current at 4.5 VFigure 6-13 Saturated Output Sourcing Current at 4.5 V
LMP8480 LMP8481 Saturated Output Sourcing Current at 12 VFigure 6-15 Saturated Output Sourcing Current at 12 V
LMP8480 LMP8481 Typical Offset Voltage vs TemperatureFigure 6-2 Typical Offset Voltage vs Temperature
LMP8480 LMP8481 Typical Gain Accuracy vs Supply VoltageFigure 6-4 Typical Gain Accuracy vs Supply Voltage
LMP8480 LMP8481 AC Common-Mode Rejection Ratio vs FrequencyFigure 6-6 AC Common-Mode Rejection Ratio vs Frequency
LMP8480 LMP8481 Small Signal Gain vs FrequencyFigure 6-8 Small Signal Gain vs Frequency
LMP8480 LMP8481 Small Signal Pulse ResponseFigure 6-10 Small Signal Pulse Response
LMP8480 LMP8481 Supply Current vs TemperatureFigure 6-12 Supply Current vs Temperature
LMP8480 LMP8481 Saturated Output Sinking Current at 4.5 VFigure 6-14 Saturated Output Sinking Current at 4.5 V
LMP8480 LMP8481 Saturated Output Current Sinking at 12 VFigure 6-16 Saturated Output Current Sinking at 12 V