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LMP8640-Q1

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LMP8640-Q1

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Produktdetails

Product type Analog output Common-mode voltage (max) (V) 42 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 900 Input offset drift (±) (typ) (µV/°C) 1.2 Features Low-side Capable Rating Automotive Voltage gain (V/V) 20 CMRR (min) (dB) 60 Bandwidth (kHz) 950 Iq (max) (mA) 0.722 Number of channels 1 Comparators (#) 0 Gain error (%) 0.25 Gain error drift (±) (max) (ppm/°C) 26.2 Slew rate (V/µs) 1.6 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 42 Common-mode voltage (min) (V) -2 Input offset (±) (max) (µV) 900 Input offset drift (±) (typ) (µV/°C) 1.2 Features Low-side Capable Rating Automotive Voltage gain (V/V) 20 CMRR (min) (dB) 60 Bandwidth (kHz) 950 Iq (max) (mA) 0.722 Number of channels 1 Comparators (#) 0 Gain error (%) 0.25 Gain error drift (±) (max) (ppm/°C) 26.2 Slew rate (V/µs) 1.6 Operating temperature range (°C) -40 to 125
SOT-23-THN (DDC) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
  • Functional Safety-Capable
  • High Common-Mode Voltage Range
    • LMP8640-Q1: -2V to 42V
    • LMP8640HV-Q1: -2V to 76V
  • Supply Voltage Range: 2.7V to 12V
  • Gain Options: 20V/V; 50V/V; 100V/V
  • Max Gain Error: 0.25%
  • Low Offset Voltage: 900µV
  • Input Bias Current: 13µA
  • PSRR: 85dB
  • CMRR (2.1V to 42V): 103dB
  • Temperature Range: -40°C to 125°C
  • 6-Pin Thin SOT-23 Package
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: −40°C to +125°C, TA
  • Functional Safety-Capable
  • High Common-Mode Voltage Range
    • LMP8640-Q1: -2V to 42V
    • LMP8640HV-Q1: -2V to 76V
  • Supply Voltage Range: 2.7V to 12V
  • Gain Options: 20V/V; 50V/V; 100V/V
  • Max Gain Error: 0.25%
  • Low Offset Voltage: 900µV
  • Input Bias Current: 13µA
  • PSRR: 85dB
  • CMRR (2.1V to 42V): 103dB
  • Temperature Range: -40°C to 125°C
  • 6-Pin Thin SOT-23 Package

The LMP8640-Q1 and the LMP8640HV-Q1 are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high input common mode voltages with a supply voltage range from 2.7V to 12V.

The LMP8640-Q1 accepts input signals with common mode voltage range from -2V to 42V, while the LMP8640HV-Q1 accepts input signal with common mode voltage range from -2V to 76V. The LMP8640-Q1 and LMP8640HV-Q1 have fixed gain for applications that demand accuracy over temperature. The LMP8640-Q1 and LMP8640HV-Q1 come out with three different fixed gains 20V/V, 50V/V, 100V/V providing a gain error as low as 0.25%. 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, excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8640-Q1 and LMP8640HV-Q1 are AEC-Q100 grade 1 qualified for automotive applications. The LMP8640x-Q1 is available in SOT-23-6 package.

The LMP8640-Q1 and the LMP8640HV-Q1 are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high input common mode voltages with a supply voltage range from 2.7V to 12V.

The LMP8640-Q1 accepts input signals with common mode voltage range from -2V to 42V, while the LMP8640HV-Q1 accepts input signal with common mode voltage range from -2V to 76V. The LMP8640-Q1 and LMP8640HV-Q1 have fixed gain for applications that demand accuracy over temperature. The LMP8640-Q1 and LMP8640HV-Q1 come out with three different fixed gains 20V/V, 50V/V, 100V/V providing a gain error as low as 0.25%. 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, excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8640-Q1 and LMP8640HV-Q1 are AEC-Q100 grade 1 qualified for automotive applications. The LMP8640x-Q1 is available in SOT-23-6 package.
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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LMP8640-Q1/HV-Q1 Precision High Voltage Current Sense Amplifiers datasheet PDF | HTML 30.10.2026
Anwendungshinweis Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 27.04.2026
Informationen zur funktionalen Sicherheit LMP8640-Q1 and LMP8640HV-Q1 Functional Safety FIT Rate, FMD and Pin FMA PDF | HTML 20.11.2025
Anwendungshinweis Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18.11.2024

Design und Entwicklung

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Evaluierungsplatine

LMP8640HV-FEVAL — Evaluierungsplatine für LMP8640HV-F – 50 V/V

The LMP8640HV-F Current Sense Evaluation Board is designed to evaluate the LMP8640HV-F, Precision Current Sensing Amplifier with fixed gain of 50V/V. This board show a typical configuration of a bidirectional current sense with two LMP8640HV-F parts mounted on the PCB together with the required (...)

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Evaluierungsplatine

LMP8640HV-HEVAL — Evaluierungsplatine für LMP8640HV-H – 100 V/V

The LMP8640HV-H Current Sense Evaluation Board is designed to evaluate the LMP8640HV-H, Precision Current Sensing Amplifier with fixed gain of 100V/V. This board show a typical configuration of a bidirectional current sense with two LMP8640HV-H parts mounted on the PCB together with the required (...)

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Evaluierungsplatine

LMP8640HV-TEVAL — Evaluierungsplatine für LMP8640HV-T – 20V/V.

The LMP8640HV-T Current Sense Evaluation Board is designed to evaluate the LMP8640HV-T, Precision Current Sensing Amplifier with fixed gain of 20V/V. This board show a typical configuration of a bidirectional current sense with two LMP8640HV-T parts mounted on the PCB together with the required (...)

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Berechnungstool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

Dieser Excel-Rechner bietet einen Vergleich zwischen zwei und fünf unserer Standard-Strommessverstärker und stellt eine Tabelle mit den grundlegenden Parametern der einzelnen Bausteine bereit. Dieser Rechner nimmt außerdem die vom Benutzer gemachten Systemzustandseingaben wie Gleichtaktspannung, (...)
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Referenzdesign

TIDA-00302 — Strom-Shunt-Monitor mit transienter Robustheit – Referenzdesign

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

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SOT-23-THN (DDC) 6 Ultra Librarian
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