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 NumberDescriptionPart StatusAmplifier TypeAvailable Quantity
LMP8640MK-T/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MK-T/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense8345 - Immediate
LMP8640MK-T/NOPB product page link
LMP8640MK-F/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MK-F/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense7181 - Immediate
LMP8640MK-F/NOPB product page link
LMP8640HVMKE-F/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640HVMKE-F/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense1538 - Immediate
LMP8640HVMKE-F/NOPB product page link
LMP8640MKE-T/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MKE-T/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense4952 - Immediate
2750 - Factory Stock
LMP8640MKE-T/NOPB product page link
LMP8640HVMKE-H/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640HVMKE-H/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense5248 - Immediate
LMP8640HVMKE-H/NOPB product page link
10001 - Factory Stock
LMP8640HVMKE-T/NOPB product page link
LMP8640MK-H/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MK-H/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense880 - Immediate
LMP8640MK-H/NOPB product page link
LMP8640MKE-F/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MKE-F/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense642 - Immediate
LMP8640MKE-F/NOPB product page link
LMP8640MKE-H/NOPB datasheet linkIC OPAMP CURR SENSE 6SOTLMP8640MKE-H/NOPBIC OPAMP CURR SENSE 6SOTActiveCurrent Sense0LMP8640MKE-H/NOPB product page link
Published: 2010-11-26