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LMP8645HV

ACTIVE

-2 to 76V, 990kHz, configurable gain current sense amplifier

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Data sheet

LMP8645HV

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 76 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 1000 Input offset drift (±) (typ) (µV/°C) 7 Features Low-side Capable, Programmable Gain Rating Catalog Voltage gain (V/V) adjustable CMRR (min) (dB) 60 Bandwidth (kHz) 990 Supply voltage (max) (V) 12 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.61 Number of channels 1 Comparators (#) 0 Gain error (%) 2 Gain error drift (±) (max) (ppm/°C) 140 Slew rate (V/µs) 0.5 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 76 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 1000 Input offset drift (±) (typ) (µV/°C) 7 Features Low-side Capable, Programmable Gain Rating Catalog Voltage gain (V/V) adjustable CMRR (min) (dB) 60 Bandwidth (kHz) 990 Supply voltage (max) (V) 12 Supply voltage (min) (V) 2.7 Iq (max) (mA) 0.61 Number of channels 1 Comparators (#) 0 Gain error (%) 2 Gain error drift (±) (max) (ppm/°C) 140 Slew rate (V/µs) 0.5 Operating temperature range (°C) -40 to 125
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • Typical Values, TA = 25°C
  • High Common-Mode Voltage Range
    • LMP8645 –2 V to 42 V
    • LMP8645HV –2 V to 76 V
  • Supply Voltage Range 2.7 V to 12 V
  • Gain Configurable With a Single Resistor
  • Maximum Variable Gain Accuracy (With External Resistor) 2%
  • Transconductance 200 µA/V
  • Low Offset Voltage 1 mV
  • Input Bias 12 µA
  • PSRR 90 dB
  • CMRR 95 dB
  • Temperature Range −40°C to 125°C
  • 6-Pin SOT Package
  • Typical Values, TA = 25°C
  • High Common-Mode Voltage Range
    • LMP8645 –2 V to 42 V
    • LMP8645HV –2 V to 76 V
  • Supply Voltage Range 2.7 V to 12 V
  • Gain Configurable With a Single Resistor
  • Maximum Variable Gain Accuracy (With External Resistor) 2%
  • Transconductance 200 µA/V
  • Low Offset Voltage 1 mV
  • Input Bias 12 µA
  • PSRR 90 dB
  • CMRR 95 dB
  • Temperature Range −40°C to 125°C
  • 6-Pin SOT Package

The LMP8645 and the LMP8645HV devices are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high-input common-mode voltages.

Operating from a supply range of 2.7 V to 12 V, the LMP8645 accepts input signals with a common-mode voltage range of –2 V to 42 V, while the LMP8645HV accepts input signals with a common-mode voltage range of –2 V to 76 V. The LMP8645 and LMP8645HV have adjustable gain for applications where supply current and high common-mode voltage are the determining factors. The gain is configured with a single resistor, providing a high level of flexibility, as well as accuracy as low as 2% (maximum) including the gain setting resistor. The output is buffered to provide low output impedance. This high-side current sense amplifier is ideal for sensing and monitoring currents in DC or battery-powered systems, has excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8645 is an ideal choice for industrial, automotive, and consumer applications, and is available in SOT-6 package.

The LMP8645 and the LMP8645HV devices are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high-input common-mode voltages.

Operating from a supply range of 2.7 V to 12 V, the LMP8645 accepts input signals with a common-mode voltage range of –2 V to 42 V, while the LMP8645HV accepts input signals with a common-mode voltage range of –2 V to 76 V. The LMP8645 and LMP8645HV have adjustable gain for applications where supply current and high common-mode voltage are the determining factors. The gain is configured with a single resistor, providing a high level of flexibility, as well as accuracy as low as 2% (maximum) including the gain setting resistor. The output is buffered to provide low output impedance. This high-side current sense amplifier is ideal for sensing and monitoring currents in DC or battery-powered systems, has excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8645 is an ideal choice for industrial, automotive, and consumer applications, and is available in SOT-6 package.
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* Data sheet LMP8645, LMP8645HV Precision High Voltage Current Sense Amplifier datasheet (Rev. H) PDF | HTML 02 May 2022
Application note Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 27 Apr 2026
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022

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