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Product details

Parameters

Common mode voltage (Max) (V) 76 Common mode voltage (Min) (V) 4 Input offset (+/-) (Max) (uV) 265 Input offset drift (+/-) (Typ) (uV/C) 6 Gain (V/V) 20, 60 Gain error (%) 0.8 Gain error drift (+/-) (Max) (ppm/°C) 60 CMRR (Min) (dB) 100 Bandwidth (kHz) 270 Supply voltage (Max) (V) 7.6 Supply voltage (Min) (V) 4.5 Iq (Max) (mA) 0.155 Number of channels (#) 1 Comparators (#) 0 Features Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Current sense amplifiers analog output

Features

  • 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

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Description

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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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet LMP848x-Q1 Automotive, 76-V, High-Side, High-Speed, Current-Sense Amplifier datasheet (Rev. A) Feb. 24, 2017
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015
User guide LMP8480EVM Current Shunt Monitors Guide (Rev. A) Mar. 19, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
Description

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 (...)

Features
  • Selectable reference voltage options through jumpers (LMP8481)
  • On-board sense resistor or external resistor
  • Optional input EMI/RFI filtering
  • Separate DUT and load supplies Sense voltage test points
  • Optional output isolation resistor

Design tools & simulation

SIMULATION MODEL Download
SNVM046B.ZIP (115 KB) - PSpice Model
SIMULATION MODEL Download
SNVM047B.ZIP (39 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM048B.TSC (2141 KB) - TINA-TI Reference Design
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
CALCULATION TOOL Download
SBOR020.ZIP (483 KB)

Reference designs

REFERENCE DESIGNS Download
Current Shunt Monitor with Transient Robustness Reference Design
TIDA-00302 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 (...)

document-generic Schematic
Design files

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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