INA228-Q1

AKTIV

Ultrapräzises I²C-Ausgangsüberwachungsmodul für Ausgangsstrom-/Spannungs-/Leistungs-/Energie-/Ladest

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Datenblatt

document-pdfAcrobat INA228-Q1 AEC-Q100, 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Interface datasheet (Rev. A) (Englisch) PDF | HTML

INA228-Q1

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Common-mode voltage (max) (V)

85

Common-mode voltage (min) (V)

-0.3

Digital interface

I2C, SMBus

Resolution (Bits)

20

Input offset (±) (max) (µV)

1

Input offset drift (±) (max) (µV/°C)

0.01

Input offset drift (±) (typ) (µV/°C)

0.002

Voltage gain (V/V)

1

CMRR (min) (dB)

154

Iq (max) (mA)

1.1

Gain error (%)

0.05

Gain error drift (±) (max) (ppm/°C)

20

Features

Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Accumulator, Integrated Power Monitor, Low-side Capable, Ultra precise

Number of channels

1

Power measurement accuracy (%)

0.1

TI functional safety category

Functional Safety-Capable

Rating

Automotive

Operating temperature range (°C)

-40 to 125

Common-mode voltage (max) (V)

85

Common-mode voltage (min) (V)

-0.3

Digital interface

I2C, SMBus

Resolution (Bits)

20

Input offset (±) (max) (µV)

1

Input offset drift (±) (max) (µV/°C)

0.01

Input offset drift (±) (typ) (µV/°C)

0.002

Voltage gain (V/V)

1

CMRR (min) (dB)

154

Iq (max) (mA)

1.1

Gain error (%)

0.05

Gain error drift (±) (max) (ppm/°C)

20

Features

Alert Function, Bidirectional, Digital Temp Monitor, Integrated Power Accumulator, Integrated Power Monitor, Low-side Capable, Ultra precise

Number of channels

1

Power measurement accuracy (%)

0.1

TI functional safety category

Functional Safety-Capable

Rating

Automotive

Operating temperature range (°C)

-40 to 125

VSSOP (DGS)

10

14.7 mm² (3 mm × 4.9 mm)

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T_A
Functional Safety-Capable
- Documentation available to aid functional safety system design
High-resolution, 20-bit delta-sigma ADC
Current monitoring accuracy:
- Offset voltage: ±1 µV (maximum)
- Offset drift: ±0.01 µV/°C (maximum)
- Gain error: ±0.05% (maximum)
- Gain error drift: ±20 ppm/°C (maximum)
- Common mode rejection: 154 dB (minimum)
Power monitoring accuracy:
- 0.5% full scale, –40°C to +125°C (maximum)
Energy and charge accuracy:
- 1.0% full scale (maximum)
Fast alert response: 75 µs
Wide common-mode range: –0.3 V to +85 V
Bus voltage sense input: 0 V to 85 V
Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
Input bias current: 2.5 nA (maximum)
Temperature sensor: ±1°C (maximum at 25°C)
Programmable resistor temperature compensation
Programmable conversion time and averaging
2.94-MHz high-speed I²C interface with 16 pin-selectable addresses
Operates from a 2.7-V to 5.5-V supply:
- Operational current: 640 µA (typical)
- Shutdown current: 5 µA (maximum)

AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, T_A
Functional Safety-Capable
- Documentation available to aid functional safety system design
High-resolution, 20-bit delta-sigma ADC
Current monitoring accuracy:
- Offset voltage: ±1 µV (maximum)
- Offset drift: ±0.01 µV/°C (maximum)
- Gain error: ±0.05% (maximum)
- Gain error drift: ±20 ppm/°C (maximum)
- Common mode rejection: 154 dB (minimum)
Power monitoring accuracy:
- 0.5% full scale, –40°C to +125°C (maximum)
Energy and charge accuracy:
- 1.0% full scale (maximum)
Fast alert response: 75 µs
Wide common-mode range: –0.3 V to +85 V
Bus voltage sense input: 0 V to 85 V
Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
Input bias current: 2.5 nA (maximum)
Temperature sensor: ±1°C (maximum at 25°C)
Programmable resistor temperature compensation
Programmable conversion time and averaging
2.94-MHz high-speed I²C interface with 16 pin-selectable addresses
Operates from a 2.7-V to 5.5-V supply:
- Operational current: 640 µA (typical)
- Shutdown current: 5 µA (maximum)

The INA228-Q1 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA228-Q1 reports current, bus voltage, 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 ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA228-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

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

The INA228-Q1 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA228-Q1 reports current, bus voltage, 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 ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA228-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

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

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Datenblatt	INA228-Q1 AEC-Q100, 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Interface datasheet (Rev. A)	PDF \| HTML	29.06.2021
	Anwendungshinweis	Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A)	PDF \| HTML	27.04.2026
	Anwendungshinweis	Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers	PDF \| HTML	18.11.2024
	Anwendungshinweis	Digital Interfaces for Current Sensing Devices (Rev. A)	PDF \| HTML	30.09.2021
	Application brief	Integrating the Current Sensing Signal Path (Rev. B)	PDF \| HTML	29.09.2021
	Application brief	Integrated, Current Sensing Analog-to-Digital Converter (Rev. A)	PDF \| HTML	28.09.2021
	Anwendungshinweis	Getting Started with Digital Power Monitors (Rev. A)	PDF \| HTML	02.09.2021
	Technischer Artikel	Solving the multidecade current-measurement challenge in your 48-V BMS application	PDF \| HTML	14.06.2021
	Application brief	Shunt-Based Current-Sensing Solutions for BMS Applications in HEVs and EVs (Rev. B)	PDF \| HTML	02.02.2021
	Informationen zur funktionalen Sicherheit	INA2xx-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA	PDF \| HTML	02.11.2020
	Application brief	Energy and Power Monitoring with Digital Current Sensors		25.05.2017
	Anwendungshinweis	Understanding the I2C Bus	PDF \| HTML	30.06.2015

Design und Entwicklung

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Evaluierungsplatine

INA228_237_238EVM — Evaluierungsmodul für INA228, INA237 und INA238

Dieses Evaluierungsmodul (EVM) ist eine benutzerfreundliche Plattform zum Evaluieren der Hauptfunktionen und der Leistung des INA228, INA237 oder INA238.

Das EVM unterstützt Strommessungen bis zu 10 A und verfügt über eine grafische Benutzeroberfläche (GUI) zum Lesen und Schreiben in (...)

Benutzerhandbuch: PDF | HTML