SNOSB28H August   2010  – October 2026 LMP8640 , LMP8640HV

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 or LMP8640HV 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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6.7 Electrical Characteristics 12V

Unless otherwise specified, all limits ensured for at TA = 25°C, VS= V+ – V-, VSENSE= +IN-(-IN), V+ = 12V, V− = 0V, −2V < VCM < 76V, RL = 10MΩ. (1)
PARAMETERTEST CONDITIONSMIN(1)TYP(1)MAX(1)UNIT
VOSInput Offset VoltageVCM = 2.1V-900900µV
VCM = 2.1V, Over Temperature-11601160
TCVOSInput Offset Voltage Drift(1) (1)VCM = 2.1V2.6µV/°C
IBInput Bias Current (1)VCM = 2.1V, VSENSE = 0V1322µA
VCM = 2.1V, Over Temperature, VSENSE = 0V28
eniInput Voltage Noise (1)f > 10kHz117nV/√ Hz
Gain AVGain LMP8640-T LMP8640HV-T20V/V
Gain LMP8640-F LMP8640HV-F50
Gain LMP8640-F LMP8640HV-F100
Gain errorVCM = 2.1V-0.25%0.25%
VCM = 2.1V, Over Temperature-0.51%0.51%
Accuracy over temperature(1)−40°C to 125°C, VCM= 2.1V26.2ppm/°C
PSRRPower Supply Rejection RatioVCM = 2.1V, 2.7V < V+ < 12V,85dB
CMRRCommon Mode Rejection RatioLMP8640HV 2.1V < VCM < 42V
LMP8640 2.1V < VCM< 42V		103dB
LMP8640HV 2.1V < VCM < 76V95
-2V < VCM < 2V,60
BWFixed Gain LMP8640-T LMP8640HV-T
(1)		DC VSENSE = 67.5mV,
CL = 30pF, RL= 1MΩ		950kHz
Fixed Gain LMP8640-F LMP8640HV-F
(1)		DC VSENSE =27mV,
CL = 30pF, RL= 1MΩ		450
Fixed Gain LMP8640-H LMP8640HV-H
(1)		DC VSENSE = 13.5mV,
CL = 30pF, RL= 1MΩ		230
SRSlew Rate (1)(1)VCM =5V, CL = 30pF, RL = 1MΩ,
LMP8640-T LMP8640HV-T
VSENSE =100mVpp,
LMP8640-F LMP8640HV-F
VSENSE =40mVpp,
LMP8640-H LMP8640HV-H
VSENSE =20mVpp,		1.8V/µs
RINDifferential Mode Input Impedance(1)4kΩ
IS Supply Current VCM = 2.1V 720 1050 µA
VCM = 2.1V, Over Temperature1250
VCM = −2V23002800
VCM = −2V, Over Temperature3000
VOUTMaximum Output VoltageVCM = 2.1V11.85V
Minimum Output Voltage LMP8640-T LMP8640HV-T
VCM = 2.1V		18.2mV
LMP8640-F LMP8640HV-F
VCM = 2.1V		40
LMP8640-H LMP8640HV-H
VCM = 2.1V		80
CLOADMax Output Capacitance Load(1)30pF