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Amplificadores de detección de corriente
Amplificadores analógicos de detección de corriente

LMP8481-Q1

ACTIVO

Amplificador de detección de corriente bidireccional de 4 V a 76 V con AEC-Q100

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LMP8481-Q1

ACTIVO
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Detalles del producto

Product type Analog output Common-mode voltage (max) (V) 76 Common-mode voltage (min) (V) 4 Input offset (±) (max) (µV) 265 Input offset drift (±) (typ) (µV/°C) 6 Features Bidirectional Rating Automotive Voltage gain (V/V) 20, 60, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 270 Iq (max) (mA) 0.155 Number of channels 1 Comparators (#) 0 Gain error (%) 0.6 Gain error drift (±) (max) (ppm/°C) 60 Slew rate (V/µs) 1 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 76 Common-mode voltage (min) (V) 4 Input offset (±) (max) (µV) 265 Input offset drift (±) (typ) (µV/°C) 6 Features Bidirectional Rating Automotive Voltage gain (V/V) 20, 60, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 270 Iq (max) (mA) 0.155 Number of channels 1 Comparators (#) 0 Gain error (%) 0.6 Gain error drift (±) (max) (ppm/°C) 60 Slew rate (V/µs) 1 Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Bidirectional or Unidirectional Sensing
  • Common Mode Voltage Range: 4.0 V to 76 V
  • Supply Voltage Range: 4.5 V to 76 V
  • Fixed Gains: 20, 60, and 100 V/V
  • Gain Accuracy: ±0.1%
  • Offset: ±80 µV
  • Bandwidth (–3 dB): 270 kHz
  • Quiescent Current: < 100 µA
  • Buffered High-Current Output: > 5 mA
  • Input Bias Current: 7 µA
  • PSRR (DC): 122 dB
  • CMRR (DC): 124 dB
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Bidirectional or Unidirectional Sensing
  • Common Mode Voltage Range: 4.0 V to 76 V
  • Supply Voltage Range: 4.5 V to 76 V
  • Fixed Gains: 20, 60, and 100 V/V
  • Gain Accuracy: ±0.1%
  • Offset: ±80 µV
  • Bandwidth (–3 dB): 270 kHz
  • Quiescent Current: < 100 µA
  • Buffered High-Current Output: > 5 mA
  • Input Bias Current: 7 µA
  • PSRR (DC): 122 dB
  • CMRR (DC): 124 dB

The automotive-qualified LMP8480-Q1 and LMP8481-Q1 devices are precision, high-side, current-sense amplifiers that amplify a small differential voltage developed across a current-sense resistor in the presence of high input common-mode voltages. These amplifiers are designed for bidirectional (LMP8481-Q1) or unidirectional (LMP8480-Q1) current applications and accept input signals with a common-mode voltage range from 4 V to 76 V with a bandwidth of 270 kHz. Because the operating power-supply range overlaps the input common-mode voltage range, the LMP848x-Q1 can be powered by the same voltage that is being monitored. This benefit eliminates the need for an intermediate supply voltage to be routed to the point of load where the current is being monitored, resulting in reduced component count and board space.

The LMP848x-Q1 family consists of fixed gains of 20, 60, and 100 for applications that demand high accuracy over temperature. The low-input offset voltage allows the use of smaller sense resistors without sacrificing system error. The LMP8480-Q1 and LMP8481-Q1 are pin-for-pin replacements for the MAX4080 and MAX4081 devices, offering improved offset voltage, wider reference adjust range, and higher output drive capabilities. The LMP8480-Q1 and LMP8481-Q1 are available in an 8-pin VSSOP package.

The automotive-qualified LMP8480-Q1 and LMP8481-Q1 devices are precision, high-side, current-sense amplifiers that amplify a small differential voltage developed across a current-sense resistor in the presence of high input common-mode voltages. These amplifiers are designed for bidirectional (LMP8481-Q1) or unidirectional (LMP8480-Q1) current applications and accept input signals with a common-mode voltage range from 4 V to 76 V with a bandwidth of 270 kHz. Because the operating power-supply range overlaps the input common-mode voltage range, the LMP848x-Q1 can be powered by the same voltage that is being monitored. This benefit eliminates the need for an intermediate supply voltage to be routed to the point of load where the current is being monitored, resulting in reduced component count and board space.

The LMP848x-Q1 family consists of fixed gains of 20, 60, and 100 for applications that demand high accuracy over temperature. The low-input offset voltage allows the use of smaller sense resistors without sacrificing system error. The LMP8480-Q1 and LMP8481-Q1 are pin-for-pin replacements for the MAX4080 and MAX4081 devices, offering improved offset voltage, wider reference adjust range, and higher output drive capabilities. The LMP8480-Q1 and LMP8481-Q1 are available in an 8-pin VSSOP package.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LMP848x-Q1 Automotive, 76-V, High-Side, High-Speed, Current-Sense Amplifier datasheet (Rev. A) PDF | HTML 24/02/2017
Nota sobre la aplicación Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML 27/04/2026
Application brief Current Mode Control in Switching Power Supplies (Rev. E) PDF | HTML 12/04/2023
Application brief Switching Power Supply Current Measurements (Rev. E) PDF | HTML 7/04/2023
Application brief Low-Drift, Precision, In-Line Motor Current Measurements With PWM Rejection (Rev. D) PDF | HTML 7/04/2023
Guía del usuario LMP8480EVM Current Shunt Monitors Guide (Rev. A) 19/03/2013

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LMP848XMMEVM-X — Herramientas de evaluación LMP8480 y LMP8481

The Texas Instruments LMP8480/81 evaluation module (EVM) helps designers quickly evaluate the operation and performance of the LMP8480/81 76V Precision High Side Current Sense Amplifier. The EVM is ready to connect to power, load, and test instruments through the use of on-board terminals.

The EVM (...)

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Modelo de simulación

LMP8481 PSpice Model (Rev. B)

SNVM341B.ZIP (77 KB) - Modelo PSpice
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Modelo de simulación

LMP8481 TINA-TI Reference Design (Rev. A)

SNVM349A.TSC (4029 KB) - Diseño de referencia TINA-TI
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Modelo de simulación

LMP8481 TINA-TI Spice Model (Rev. A)

SNVM348A.ZIP (60 KB) - Modelo TINA-TI Spice
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Herramienta de cálculo

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

Esta calculadora Excel proporciona una comparación entre dos y cinco de nuestros amplificadores de detección de corriente estándar y ofrece un gráfico que contiene los parámetros básicos de cada dispositivo. Esta calculadora también toma las entradas de la condición del sistema de los usuarios, (...)
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Diseño de referencia

TIDA-00302 — Diseño de referencia del monitor de derivación de corriente con solidez transitoria

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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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
VSSOP (DGK) 8 Ultra Librarian
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