SNOSDI6 October   2026 LMP8640-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  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 2.7V
    6. 6.6 Electrical Characteristics 5 V
    7. 6.7 Electrical Characteristics 12V
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Selection of Sense Resistor
        1. 7.3.1.1 Resistor Power Rating and Thermal Issues
        2. 7.3.1.2 Using PCB Trace as a Sense Resistor
      2. 7.3.2 Sense Line Inputs
      3. 7.3.3 Effects of Series Resistance on Sense Lines
    4. 7.4 Device Functional Modes
      1. 7.4.1 Bias Current at Low Common Mode Voltage
      2. 7.4.2 Applying Input Voltage With No Supply Voltage
      3. 7.4.3 Driving an ADC
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Design Procedure
        1. 8.2.2.1 First Step – LMP8640-Q1 or LMP8640HV-Q1 Selection
        2. 8.2.2.2 Second Step – Gain Option Selection
        3. 8.2.2.3 Third Step – Shunt Resistor Selection
      3. 8.2.3 Application Curve
    3. 8.3 What to Do and What Not to Do
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

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6.6 Electrical Characteristics 5 V

Unless otherwise specified, all limits verified at TA = 25°C, VS= V+ – V-, VSENSE= +IN-(-IN), V+ = 5V, V− = 0V, −2V < VCM < 76V, RL = 10MΩ. (1)
PARAMETERTEST CONDITIONSMIN(1)TYP(1)MAX(1)UNIT
VOSInput Offset VoltageVCM = 2.1 V-900900µV
VCM = 2.1 V, Over Temperature-11601160
TCVOSInput Offset Voltage Drift(1) (1)VCM = 2.1 V2.6µV/°C
IBInput Bias Current (1)VCM = 2.1 V, VSENSE = 0 V1321µA
VCM = 2.1 V, Over Temperature,VSENSE = 0 V28
eniInput Voltage Noise (1)f > 10 kHz117nV/√ Hz
Gain AV Gain LMP8640-Q1-T LMP8640HV-Q1-T 20 V/V
Gain LMP8640-Q1-F LMP8640HV-Q1-F50
Gain LMP8640-Q1-H LMP8640HV-Q1-H100
Gain errorVCM = 2.1 V-0.25%0.25%
VCM = 2.1 V, Over Temperature-0.51%0.51%
Accuracy over temperature(1)−40°C to 125°C, VCM=2.1 V26.2ppm/°C
PSRRPower Supply Rejection RatioVCM = 2.1 V, 2.7V < V+ < 12 V,85dB
CMRRCommon Mode Rejection RatioLMP8640HV-Q1 2.1V < VCM < 42V
LMP8640-Q1 2.1V < VCM< 42V		103dB
LMP8640HV-Q1 2.1V < VCM < 76V95
-2 V <VCM < 2 V,60
BWFixed Gain
LMP8640-Q1-T LMP8640HV-Q1-T (1)		DC VSENSE = 67.5 mV,
CL = 30 pF, RL= 1 MΩ		950kHz
Fixed Gain
LMP8640-Q1-F LMP8640HV-Q1-F(1)		DC VSENSE =27 mV,
CL = 30 pF, RL= 1 MΩ		450
Fixed Gain
LMP8640-Q1-H LMP8640HV-Q1-H(1)		DC VSENSE = 13.5 mV,
CL = 30 pF, RL= 1MΩ		230
SRSlew Rate (1)(1)VCM =5 V, CL = 30 pF, RL = 1MΩ,
LMP8640-Q1-T LMP8640HV-Q1-T
VSENSE = 200 mVpp,
LMP8640-Q1-F LMP8640HV-Q1-F
VSENSE = 80 mVpp,
LMP8640-Q1-H LMP8640HV-Q1-H
VSENSE = 40 mVpp,		1.6V/µs
RINDifferential Mode Input Impedance(1)4kΩ
ISSupply CurrentVCM = 2.1 V500722µA
VCM = 2.1 V, Over Temperature922
VCM = −2 V20502500
VCM = −2 V, Over Temperature2750
VOUTMaximum Output VoltageVCM = 2.1 V4.95V
Minimum Output Voltage LMP8640-Q1-T LMP8640HV-Q1-T
VCM = 2.1 V		18.2mV
LMP8640-Q1-F LMP8640HV-Q1-F
VCM = 2.1 V		40
LMP8640-Q1-H LMP8640HV-Q1-H
VCM = 2.1 V		80
CLOADMax Output Capacitance Load(1)30pF