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LMP92064

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2V, 12-bit, fast simultaneous sampling SPI output current/voltage monitor

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Data sheet

LMP92064

ACTIVE
Data sheet Order now

Product details

Common-mode voltage (max) (V) 2 Common-mode voltage (min) (V) -0.2 Digital interface SPI Resolution (Bits) 12 Input offset (±) (max) (µV) 32 Input offset drift (±) (max) (µV/°C) 0.28 Input offset drift (±) (typ) (µV/°C) 0.28 Voltage gain (V/V) 25 CMRR (min) (dB) 110 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 4.5 Iq (max) (mA) 13 Gain error (%) 0.5, 0.75 Gain error drift (±) (max) (ppm/°C) 25 Features Low-side Capable Number of channels 1 Power measurement accuracy (%) 1.5 Rating Catalog Operating temperature range (°C) -40 to 105
Common-mode voltage (max) (V) 2 Common-mode voltage (min) (V) -0.2 Digital interface SPI Resolution (Bits) 12 Input offset (±) (max) (µV) 32 Input offset drift (±) (max) (µV/°C) 0.28 Input offset drift (±) (typ) (µV/°C) 0.28 Voltage gain (V/V) 25 CMRR (min) (dB) 110 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 4.5 Iq (max) (mA) 13 Gain error (%) 0.5, 0.75 Gain error drift (±) (max) (ppm/°C) 25 Features Low-side Capable Number of channels 1 Power measurement accuracy (%) 1.5 Rating Catalog Operating temperature range (°C) -40 to 105
WSON (NHR) 16 20 mm² 5 x 4
  • 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
  • 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

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.

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

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Type Title Date
* Data sheet LMP92064 Precision Low-Side, 125-kSps Simultaneous Sampling, Current Sensor and Voltage Monitor With SPI datasheet (Rev. A) PDF | HTML 29 Dec 2014
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022

Design & development

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

Firmware

SNOC016 — BOOST-LMP92064EVM Launchpad Firmware

Supported products & hardware

Supported products & hardware

Products
Digital power monitors
  • LMP92064 — 2V, 12-bit, fast simultaneous sampling SPI output current/voltage monitor
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Simulation model

LMP92064 IBIS Model

SNOM458.ZIP (24 KB) - IBIS Model
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Calculation tool

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

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
Supported products & hardware

Supported products & hardware

Products
Digital power monitors
  • INA2227 — Dual-channel 16-bit E3-driver-capable current, voltage, power and energy monitor with I²C interface
  • INA4230 — Quad-channel, 16-bit high-precision E3-driver-capable current, voltage, power and energy monitor
  • INA4235 — Quad channel, 16-bit, ultra-precise, current, voltage, power and energy monitor with I²C Interface
  • LMP92064 — 2V, 12-bit, fast simultaneous sampling SPI output current/voltage monitor
  • INA209 — 26V, 12-bit, i2c output current/voltage/power monitor w/ analog comparator
  • INA219 — 26-V 12-bit I2C output digital power monitor
  • INA220 — 26V, 12-bit, i2c output current/voltage/power monitor
  • INA220-Q1 — AEC-Q100, 26V, 12-bit, i2c output current/voltage/power monitor
  • INA226 — 36V, 16-bit, ultra-precise i2c output current/voltage/power monitor w/alert
  • INA226-Q1 — AEC-Q100, 36V, 16-bit, ultra-precise, i2c output current/voltage/power monitor w/alert
  • INA228 — 85V, 20-bit I²C-output E3-driver-capable current, voltage, power, energy, charge monitor with alert
  • INA228-Q1 — AEC-Q100, 85-V, 20-bit, ultraprecise, I²C output current/voltage/power/energy/charge monitor
  • INA229 — 85-V, 20-bit, ultra-precise, SPI output current/voltage/power/energy/charge monitor with alert
  • INA229-Q1 — AEC-Q100, 85-V, 20-bit, ultraprecise, SPI output current/voltage/power/energy/charge monitor
  • INA230 — 36-V, 16-bit, I²C output current, voltage and power monitor with alert
  • INA231 — 28V, 16-bit, i2c output current/voltage/power monitor w/alert in wcsp
  • INA232 — 48-V, 16-bit high-precision I²C output digital power monitor with alert
  • INA233 — 36V, 16-bit, ultra-precise i2c & pmbus output current/voltage/power/energy monitor w/alert
  • INA234 — 28-V, 12-bit, I²C output current/voltage/power monitor with alert in WCSP
  • INA236 — 48-V, 16-bit ultraprecise I²C output digital power monitor with alert in WCSP
  • INA237 — 85-V, 16-bit, I2C output current/voltage/power monitor with alert
  • INA237-Q1 — AEC-Q100, 85-V, 16-bit, I²C output current/voltage/charge monitor
  • INA238-Q1 — AEC-Q100, 85-V, 16-bit, high-precision, I²C output current/voltage/charge monitor
  • INA239 — 85-V, 16-bit, high-precision, SPI output current/voltage/power monitor with alert
  • INA239-Q1 — AEC-Q100, 85-V, 16-bit, high-precision, SPI output current/voltage/power monitor
  • INA3221 — 26V, triple channel, 13-bit, i2c output current/voltage monitor w/alerts
  • INA3221-Q1 — AEC-Q100, 26V, triple channel, 13-bit, i2c output current/voltage monitor w/alerts
  • INA238 — 85-V, 16-bit, high-precision I2C output current/voltage/power monitor with alert
Analog current-sense amplifiers
  • INA180 — 26V, 350kHz current sense amplifier
  • INA180-Q1 — AEC-Q100, 26V, 350kHz current sense amplifier
  • INA181 — 26-V bi-directional 350-kHz current-sense amplifier
  • INA181-Q1 — AEC-Q100, 26V, bi-directional, 350kHz current sense amplifier
  • INA183 — 2.7-V to 26-V, high-precision current sense amplifier with input supply
  • INA185 — 26-V, 350-kHz, bi-directional, high-precision current sense amplifier in ultra-small SOT-563 package
  • INA185-Q1 — AEC-Q100, 26-V, 350-kHz, bi-directional, high-precision current sense amplifier
  • INA186 — 40-V, bidirectional, high-precision current sense amplifier with picoamp input bias & ENABLE
  • INA186-Q1 — AEC-Q100, 40-V, bidirectional, high-precision current sense amplifier w/ picoamp input bias & ENABLE
  • INA187 — -2V to 40V, bidirectional 650 kHz precise current-sense amplifier
  • INA187-Q1 — AEC-Q100 qualified, -2V to 40V, bidirectional 650kHz precise current-sense amplifier
  • INA190 — 40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & ENABLE
  • INA190-Q1 — AEC-Q100, 40V, bi-directional, ultra-precise current sense amplifier w/picoamp IB & ENABLE
  • INA191 — 40V, ultra-precise current sense amplifier with ENABLE and picoamp IB in WCSP
  • INA193 — -16 to 80V, 500kHz current sense amplifier
  • INA193A-EP — Enhanced product, -16 to 80V, 500-kHz current sense amplifier
  • INA193A-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier
  • INA194 — -16 to 80V, 500kHz current sense amplifier
  • INA194A-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier
  • INA195 — -16 to 80V, 500kHz current sense amplifier
  • INA195A-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier
  • INA196 — -16 to 80V, 500kHz current sense amplifier
  • INA196A-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier
  • INA197 — -16 to 80V, 500kHz current sense amplifier
  • INA197A-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier
  • INA198 — -16 to 80V, 500kHz current sense amplifier
  • INA198A-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier
  • INA199 — 26V, bi-directional current sense amplifier
  • INA199-Q1 — AEC-Q100, 26V, bi-directional current sense amplifier
  • INA200 — -16 to 80V, 500kHz current sense amplifier w/ comparator
  • INA200-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier w/ comparator
  • INA201 — -16 to 80V, 500kHz current sense amplifier w/ comparator
  • INA201-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier w/ comparator
  • INA202 — -16 to 80V, 500kHz current sense amplifier w/ comparator
  • INA202-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier w/ comparator
  • INA203 — -16 to 80V, 500kHz current sense amplifier w/ dual comparators
  • INA203-Q1 — AEC-Q100, -16 to 80V, 500kHz current sense amplifier w/ dual comparators
  • INA204 — -16 to 80V, 500kHz current sense amplifier w/ dual comparators
  • INA205 — -16 to 80V, 500kHz current sense amplifier w/ dual comparators
  • INA206 — -16 to 80V, 500kHz current sense amplifier w/ window comparator
  • INA207 — -16 to 80V, 500kHz current sense amplifier w/ window comparator
  • INA208 — -16 to 80V, 500kHz current sense amplifier w/ window comparator
  • INA210 — 26V, bi-directional, high-precision current sense amplifier
  • INA210-Q1 — AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
  • INA211 — 26V, bi-directional, high-precision current sense amplifier
  • INA211-Q1 — AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
  • INA212 — 26V, bi-directional, high-precision current sense amplifier
  • INA212-Q1 — AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
  • INA213 — 26V, bi-directional, high-precision current sense amplifier
  • INA213-Q1 — AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
  • INA214 — 26V, bi-directional, high-precision current sense amplifier
  • INA214-Q1 — AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
  • INA215 — 26V, bi-directional, high-precision current sense amplifier
  • INA215-Q1 — AEC-Q100, 26V, bi-directional, high-precision current sense amplifier
  • INA216 — 1.8 to 5.5V, high-precision current sense amplifier in wcsp
  • INA2180 — 26V, dual channel, 350kHz current sense amplifier
  • INA2180-Q1 — AEC-Q100, 26V, dual channel, 350kHz current sense amplifier
  • INA2181 — 26V, dual channel, bi-directional, 350kHz current sense amplifier
  • INA2181-Q1 — AEC-Q100, 26V, dual channel, bi-directional, 350kHz current sense amplifier
  • INA2191 — 40-V, dual-channel, bidirectional, ultraprecise current sense amp w/ picoamp IB & ENABLE in wcsp
  • INA223 — 26V, programmable-gain current sense amplifier & analog power monitor
  • INA225 — 36V, bi-directional current sense amplifier w/ four pin-selectable gain settings
  • INA225-Q1 — AEC-Q100, 36V, bi-directional current sense amplifier w/ four pin-selectable gain settings
  • INA2290 — Dual-channel, 2.7-V to 120-V, 1.1-MHz, ultra-precise current sense amplifier
  • INA240 — -4 to 80V, bidirectional, ultra-precise current sense amplifier with enhanced PWM rejection
  • INA240-Q1 — AEC-Q100, -4 to 80V, bi-directional, ultra-precise current sense amplifier w/ enhanced pwm rejection
  • INA241A — -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA241A-Q1 — AEC-Q100, -4V to 110V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA241B — -5-V to 110-V bidirectional high-precision current sense amplifier with enhanced PWM rejection
  • INA241B-Q1 — AEC-Q100, -4V to 110V bidirectional high-precision current sense amp with enhanced PWM rejection
  • INA270 — -16 to 80V, split-stage current sense amplifier w/ in-line filter capability
  • INA270A-Q1 — AEC-Q100, -16 to 80V, split-stage current sense amplifier w/ in-line filter capability
  • INA271 — -16 to 80V, split-stage current sense amplifier w/ in-line filter capability
  • INA271-HT — High temp, -16 to 80V, split-stage current sense amplifier w/ in-line filter capability
  • INA271A-Q1 — AEC-Q100, -16 to 80V, split-stage current sense amplifier w/ in-line filter capability
  • INA280 — 2.7-V to 120-V, 1.1-MHz, high-precision current sense amplifier in small (SC-70) package
  • INA280-Q1 — AEC-Q100, 2.7-V to 120-V, 1.1-Mhz current sense amplifier in small (SC-70) package
  • INA281 — -4-V to 110-V, 1.3-MHz, high-precision current sense amplifier
  • INA281-Q1 — AEC-Q100, -4-V to 110-V, 1.3-MHz current sense amplifier
  • INA282 — -14 to 80V, bi-directional current sense amplifier
  • INA282-Q1 — AEC-Q100, -14 to 80V, bi-directional current sense amplifier
  • INA283 — -14 to 80V, bi-directional current sense amplifier
  • INA283-Q1 — AEC-Q100, -14 to 80V, bi-directional current sense amplifier
  • INA284 — -14 to 80V, bi-directional current sense amplifier
  • INA284-Q1 — AEC-Q100, -14 to 80V, bi-directional current sense amplifier
  • INA285 — -14 to 80V, bi-directional current sense amplifier
  • INA285-Q1 — AEC-Q100, -14 to 80V, bi-directional current sense amplifier
  • INA286 — -14 to 80V, bi-directional current sense amplifier
  • INA286-Q1 — AEC-Q100, -14 to 80V, bi-directional current sense amplifier
  • INA290 — 2.7 to 120V, 1.1MHz, ultra-precise current sense amplifier in small (SC-70) package
  • INA290-Q1 — AEC-Q100, 2.7-V to 120-V, 1.1-MHz, ultra-precise current sense amplifier in small (SC-70) package
  • INA293 — -4-V to 110-V, 1.3-MHz, ultra-precise current sense amplifier
  • INA293-Q1 — AEC-Q100, -4-V to 110-V, 1.3-MHz, ultra-precise current sense amplifier
  • INA296A — -5-V to 110-V, bidirectional, 1.1-MHz 8-V/µs ultraprecise current sense amplifier
  • INA296A-Q1 — AEC-Q100, -5V to 110V, bidirectional, 1.1-MHz 8-V/µs ultraprecise current sense amplifier
  • INA296B — -5-V to 110-V, bidirectional, 1.1-MHz 8-V/µs high-precision current sense amplifier
  • INA296B-Q1 — AEC-Q100, -5V to 110V, bidirectional, 1.1-MHz 8-V/µs high-precision current sense amplifier
  • INA299 — -2V to 80V, bidirectional 650 kHz precise current-sense amplifier
  • INA299-Q1 — AEC-Q100 qualified, -2V to 80V, bidirectional 650kHz precise current-sense amplifier
  • INA301 — 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator
  • INA301-Q1 — AEC-Q100, 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator
  • INA302 — 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amplifier w/ dual comparators
  • INA302-Q1 — AEC-Q100, 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amp w/ dual comparators
  • INA303 — 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amplifier w/ window comparator
  • INA303-Q1 — AEC-Q100, 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amp w/ window comparator
  • INA310A — -4-V to 110-V, 1.3-MHz, ultra-precise current-sense amplifier with comparator
  • INA310A-Q1 — AEC-Q100 -4-V to 110-V 1.3-MHz ultra-precise current-sense amplifier with comparator and reference
  • INA310B — -4-V to 110-V 1.3-MHz high-precision current-sense amplifier with comparator
  • INA310B-Q1 — AEC-Q100 -4-V to 110-V 1.3-MHz high precision current-sense amplifier with comparator and reference
  • INA381 — 26-V, 350-kHz current sense amplifier with integrated over-current comparator
  • INA381-Q1 — AEC-Q100, 26-V, 350-kHz current sense amplifier with integrated overcurrent comparator
  • INA4180 — 26V, quad channel, 350kHz current sense amplifier
  • INA4180-Q1 — AEC-Q100, 26V, quad channel, 350kHz current sense amplifier
  • INA4181 — 26V, quad channel, bi-directional, 350kHz current sense amplifier
  • INA4181-Q1 — AEC-Q100, 26V, quad channel, bi-directional, 350kHz current sense amplifier
  • INA4290 — Quad-channel, 120-V, high-voltage, high-bandwidth, unidirectional current sense amplifier
  • INA901-SP — Radiation hardened, -15-V to 65-V, split-stage current sense amplifier with in-line filter option
  • LMP8278Q-Q1 — AEC-Q100, -2 to 40V, split-stage current sense amplifier w/ in-line filter capability
  • LMP8480 — 4 to 76V current sense amplifier
  • LMP8480-Q1 — AEC-Q100, 4 to 76V current sense amplifier
  • LMP8481 — 4 to 76V, bi-directional current sense amplifier
  • LMP8481-Q1 — AEC-Q100, 4 to 76V, bi-directional current sense amplifier
  • LMP8601 — -22 to 60V, bi-directional current sense amplifier w/ in-line filter capability
  • LMP8601-Q1 — AEC-Q100, -22 to 60V, bi-directional current sense amplifier w/ in-line filter capability
  • LMP8602 — -22 to 60V, bi-directional current sense amplifier w/ in-line filter capability
  • LMP8602-Q1 — AEC-Q100, -22 to 60V, bi-directional current sense amplifier w/ in-line filter capability
  • LMP8603 — -22 to 60V, bi-directional current sense amplifier w/ in-line filter capability
  • LMP8603-Q1 — AEC-Q100, -22 to 60V, bi-directional current sense amplifier w/ in-line filter capability
  • LMP8640 — -2 to 42V, 950kHz current sense amplifier
  • LMP8640-Q1 — AEC-Q100, -2 to 42V, 950kHz current sense amplifier
  • LMP8640HV — -2 to 76V, 950kHz current sense amplifier
  • INA190-EP — Enhanced product, 40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & EN
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