LMP8640 Current Sense Amplifiers

Texas Instruments' precision high voltage current sense amplifiers

Image of Texas Instruments' LMP8640 Current Sense AmplifiersTexas Instruments' LMP8640 and the LMP8640HV are precision current sense amplifiers that detect small differential voltages across a sense resistors in the presence of high input common mode voltages with supply voltage ranges from 2.7 V to 12 V. The LMP8640 amplifiers accept input signals with a common mode voltage range from -2 V to 42 V, while the LMP8640HV accepts input signal with common mode voltage range from -2 V to 76 V. The LMP8640 and LMP8640HV have fixed gain for applications that demand accuracy over temperature. They offer three different fixed gains, 20 V/V, 50 V/V, and 100 V/V, ensuring gain accuracy as low as 0.25%. The output is buffered in order to provide low output impedance. This high side current sense amplifier is ideal for sensing and monitoring currents in DC or battery powered systems. These amplifiers also have excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8640 and LMP8640HV are ideal choice for industrial, automotive and consumer applications, and it is available in TSOT-6 package.

Features Applications
  • Typical values, TA = 25°C
  • Supply voltage range: 2.7 V to 12 V
  • Gain options: 20 V/V, 50 V/V, 100 V/V
  • Max gain error: 0.25%
  • Low offset voltage: 900 µV
  • Input bias current: 13 µA
  • PSRR: 8 5dB
  • CMRR (2.1V to 42V): 103 dB
  • Temperature range: -40°C to 125°C
  • High-side current sense
  • Vehicle current measurement
  • Motor controls
  • Battery monitoring
  • Remote sensing
  • Power management

Current Sense Amplifiers

ImageManufacturer Part NumberDescriptionAmplifier TypeNumber of CircuitsAvailable Quantity
LMP8640MK-T/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MK-T/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense18462 - Immediate
2000 - Factory Stock
LMP8640MK-T/NOPB product page link
LMP8640MK-F/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MK-F/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense17925 - Immediate
LMP8640MK-F/NOPB product page link
LMP8640MKE-T/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MKE-T/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense14977 - Immediate
2750 - Factory Stock
LMP8640MKE-T/NOPB product page link
LMP8640HVMKE-F/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640HVMKE-F/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense138 - Immediate
1750 - Factory Stock
LMP8640HVMKE-F/NOPB product page link
LMP8640HVMKE-H/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640HVMKE-H/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense1548 - Immediate
LMP8640HVMKE-H/NOPB product page link
LMP8640HVMKE-T/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640HVMKE-T/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense1890 - Immediate
10000 - Factory Stock
LMP8640HVMKE-T/NOPB product page link
LMP8640MKE-F/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MKE-F/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense1892 - Immediate
LMP8640MKE-F/NOPB product page link
LMP8640MK-H/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MK-H/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense10LMP8640MK-H/NOPB product page link
LMP8640MKE-H/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MKE-H/NOPBIC OPAMP CURR SENSE 6SOTCurrent Sense10LMP8640MKE-H/NOPB product page link
Published: 2010-11-26