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Product details

Parameters

Common mode voltage (Max) (V) 2 Common mode voltage (Min) (V) -0.2 Input offset (+/-) (Max) (uV) 60 Input offset drift (+/-) (Typ) (uV/C) 0.28 Gain (V/V) 25 Gain error (%) 0.75 Gain error drift (+/-) (Max) (ppm/°C) 25 CMRR (Min) (dB) 110 Bandwidth (kHz) 70 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 4.5 Iq (Max) (mA) 13 Digital interface SPI Features Low-side Capable Resolution (Bits) 12 Rating Catalog Operating temperature range (C) -40 to 105 open-in-new Find other Current/voltage/power monitors

Package | Pins | Size

WSON (NHR) 16 20 mm² 5 x 4 open-in-new Find other Current/voltage/power monitors

Features

  • Two Simultaneous Sampling 12-Bit ADCs
    • Conversion Rate: 125 kSps (Minimum)
  • 12-Bit Current Sense Channel
    • Input-referred Offset: ±15 µV
    • Common-mode Voltage Range: –0.2 V to 2 V
    • Maximum Differential Input Voltage: 75 mV
    • Fixed Gain: 25 V/V
    • Gain Error: ±0.75% (Maximum)
    • Bandwidth (–3dB): 70 kHz
    • DC PSRR: 100 dB
    • DC CMRR: 110 dB
  • 12-Bit Voltage Channel
    • INL: ±1 LSB
    • Offset Error: ±2 mV (Maximum)
    • Gain Error: ±0.75% (Maximum)
    • Maximum Input Voltage: 2.048 V
    • Bandwidth: 100 kHz
  • Internal Reference
  • SPI Frequency: Up to 20 MHz
  • Temperature Range: –40°C to 105°C
  • 16-Pin WSON Package
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Description

The LMP92064 is a precision low-side digital current sensor and voltage monitor with a digital SPI interface. This analog frontend (AFE) includes a precision current sense amplifier to measure a load current across a shunt resistor and a buffered voltage channel to measure the voltage supply of the load. The current and voltage channels are sampled simultaneously by independent 125-kSps, 12-bit ADC converters, allowing for very accurate power calculations in unidirectional sensing applications.

The LMP92064 includes an internal 2.048-V reference for the ADCs, eliminating the need of an external reference and reducing component count and board space.

A host can communicate with the LMP92064 using a four-wire SPI interface running at speeds of up to 20 MHz. The fast SPI interface lets the user take advantage of the higher bandwidth ADC to capture fast varying signals. The four-wire interface with dedicated unidirectional input and output lines also allows for an easy interface to digital isolators in applications where isolation is required.

The LMP92064 operates from a single 4.5-V to 5.5-V supply and includes a separate digital supply pin. The LMP92064 is specified over a temperature range of –40°C to 105°C, and is available in a 5-mm × 4-mm 16-Pin WSON 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 8
Type Title Date
* Datasheet LMP92064 Precision Low-Side, 125-kSps Simultaneous Sampling, Current Sensor and Voltage Monitor With SPI datasheet (Rev. A) Dec. 29, 2014
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application note Digital Interfaces for Current Sensing Devices Jun. 30, 2017
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 LMP92064EVM BoosterPack User's Guide Jan. 27, 2014
User guide LMP92064EVM User's Guide Jun. 11, 2013

Design & development

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Software development

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Design tools & simulation

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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)

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WSON (NHR) 16 View options

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