INA745B

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Monitor de alimentación digital de salida I²C de 40 V y 16 bits con tecnología EZShunt™ de 800 µΩ

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Hoja de datos

document-pdfAcrobat INA745x 40V , 16 -Bit, Precision I2C Output Digital Power Monitor With EZShunt Technology datasheet (Rev. B) (Inglés) PDF | HTML

INA745B

ACTIVO

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Detalles del producto

Common-mode voltage (max) (V)

40

Common-mode voltage (min) (V)

-0.1

Continuous current (max) (A)

35

Input offset current (±) (max) (mA)

62.5

Input offset current drift (±) (typ) (µA/°C)

5

Gain error (%)

0.1

Iq (max) (mA)

1

Digital interface

I2C

Resolution (Bits)

16

Features

Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Monitor, Integrated Shunt, Low-side Capable, Standard precision

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Common-mode voltage (max) (V)

40

Common-mode voltage (min) (V)

-0.1

Continuous current (max) (A)

35

Input offset current (±) (max) (mA)

62.5

Input offset current drift (±) (typ) (µA/°C)

5

Gain error (%)

0.1

Iq (max) (mA)

1

Digital interface

I2C

Resolution (Bits)

16

Features

Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Monitor, Integrated Shunt, Low-side Capable, Standard precision

Rating

Catalog

Operating temperature range (°C)

-40 to 125

VQFN (REL)

14

15 mm² (5 mm × 3 mm)

Low loss integrated shunt resistor
- Internal resistance: 800µΩ, TA = 25°C
- Continuous current: ±35A, TA = 25°C
- Peak measurement capability: ±39.32A
Current monitoring accuracy: A/B Grade (maximum)
- Offset current: ±6.25mA / ±62.5mA
- Offset drift: ±30µA/°C (A and B Grades)
- System gain error: ±0.75% / ±1.25%
- Common-mode rejection: ±0.125 / ±1.25mA/V
Power monitoring accuracy: A/B Grade, (maximum)
- ±0.9% / ±1.6% at 25°C, full scale
Energy and charge accuracy: A/B Grade, (maximum)
- ±1.4% / ±2.1% at 25°C, full scale
Temperature sensor: ±1.5°C (maximum at 25°C)
Precision oscillator: ±0.5% (maximum at 25°C)
Programmable conversion time and averaging
2.94MHz high-speed I2C interface with 16 pin-selectable addresses
Operates from a 2.7V to 5.5V supply:
- Operational current: 640µA (typical)
- Shutdown current: 5µA (maximum)

Low loss integrated shunt resistor
- Internal resistance: 800µΩ, TA = 25°C
- Continuous current: ±35A, TA = 25°C
- Peak measurement capability: ±39.32A
Current monitoring accuracy: A/B Grade (maximum)
- Offset current: ±6.25mA / ±62.5mA
- Offset drift: ±30µA/°C (A and B Grades)
- System gain error: ±0.75% / ±1.25%
- Common-mode rejection: ±0.125 / ±1.25mA/V
Power monitoring accuracy: A/B Grade, (maximum)
- ±0.9% / ±1.6% at 25°C, full scale
Energy and charge accuracy: A/B Grade, (maximum)
- ±1.4% / ±2.1% at 25°C, full scale
Temperature sensor: ±1.5°C (maximum at 25°C)
Precision oscillator: ±0.5% (maximum at 25°C)
Programmable conversion time and averaging
2.94MHz high-speed I2C interface with 16 pin-selectable addresses
Operates from a 2.7V to 5.5V supply:
- Operational current: 640µA (typical)
- Shutdown current: 5µA (maximum)

The INA745x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±39.32A with common-mode voltage support from –0.1V to +40V.

The INA745x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

The low offset and gain drift design of the INA745x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50µs to 4.12ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

The INA745x is a digital power monitor with an integrated current sensing element along with a 16-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure full-scale currents up to ±39.32A with common-mode voltage support from –0.1V to +40V.

The INA745x reports current, bus voltage, die temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±2.5°C accurate over the junction temperature range.

The low offset and gain drift design of the INA745x allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing.

The device allows for selectable ADC conversion times from 50µs to 4.12ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

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Documentación técnica

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Documentación principal	Tipo	Título	Opciones de formato
*	Hoja de datos	INA745x 40V , 16 -Bit, Precision I2C Output Digital Power Monitor With EZShunt Technology datasheet (Rev. B)	PDF \| HTML	22/08/2025
	Nota sobre la aplicación	Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers	PDF \| HTML	18/11/2024
	Nota sobre la aplicación	How EZShunt Technology Simplifies and Reduces Error in Shunt-Based Designs	PDF \| HTML	27/06/2024
	Certificado	INA745BEVM EU Declaration of Conformity (DoC)		18/05/2023

Diseño y desarrollo

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Placa de evaluación

INA745-INA746EVM — Módulo de evaluación INA745 e INA746 para EZShunt™ Digital Power Monitor con resistencia de derivaci

El módulo de evaluación (EVM) INA745-IN746 es una plataforma compacta para evaluar las principales características y el rendimiento de los monitores de alimentación digitales de alta precisión INA745A, INA745B o INA746 con tecnología EZShunt™ en rangos especificados de corriente de entrada, tensión (...)

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