INA239

AKTIV

Hochpräzises SPI-Überwachungsmodul für Ausgangsstrom/Spannung/Leistung mit Warnfunktionen (85 V,

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Datenblatt

document-pdfAcrobat INA239 85-V, 16-Bit, High-Precision Power Monitor With SPI Interface datasheet (Rev. A) (Englisch) PDF | HTML

INA239

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Common-mode voltage (max) (V)

85

Common-mode voltage (min) (V)

-0.3

Digital interface

SPI

Resolution (Bits)

16

Input offset (±) (max) (µV)

5

Input offset drift (±) (max) (µV/°C)

0.02

Input offset drift (±) (typ) (µV/°C)

0.002

Voltage gain (V/V)

1

CMRR (min) (dB)

140

Iq (max) (mA)

1.1

Gain error (%)

0.1

Gain error drift (±) (max) (ppm/°C)

25

Features

Alert Function, Bidirectional, Digital Temp Monitor, High precision, Integrated Power Monitor, Low-side Capable, SPI

Number of channels

1

Power measurement accuracy (%)

0.2

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Common-mode voltage (max) (V)

85

Common-mode voltage (min) (V)

-0.3

Digital interface

SPI

Resolution (Bits)

16

Input offset (±) (max) (µV)

5

Input offset drift (±) (max) (µV/°C)

0.02

Input offset drift (±) (typ) (µV/°C)

0.002

Voltage gain (V/V)

1

CMRR (min) (dB)

140

Iq (max) (mA)

1.1

Gain error (%)

0.1

Gain error drift (±) (max) (ppm/°C)

25

Features

Alert Function, Bidirectional, Digital Temp Monitor, High precision, Integrated Power Monitor, Low-side Capable, SPI

Number of channels

1

Power measurement accuracy (%)

0.2

Rating

Catalog

Operating temperature range (°C)

-40 to 125

VSSOP (DGS)

10

14.7 mm² (3 mm × 4.9 mm)

High-resolution, 16-bit delta-sigma ADC
Current monitoring accuracy:
- Offset voltage: ±5 µV (maximum)
- Offset drift: ±0.02 µV/°C (maximum)
- Gain error: ±0.1% (maximum)
- Gain error drift: ±25 ppm/°C (maximum)
- Common mode rejection: 140 dB (minimum)
Power monitoring accuracy:
- 0.7% full scale, –40°C to +125°C (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 conversion time and averaging
10-MHz SPI communication interface
Operates from a 2.7-V to 5.5-V supply:
- Operational current: 640 µA (typical)
- Shutdown current: 5 µA (maximum)

High-resolution, 16-bit delta-sigma ADC
Current monitoring accuracy:
- Offset voltage: ±5 µV (maximum)
- Offset drift: ±0.02 µV/°C (maximum)
- Gain error: ±0.1% (maximum)
- Gain error drift: ±25 ppm/°C (maximum)
- Common mode rejection: 140 dB (minimum)
Power monitoring accuracy:
- 0.7% full scale, –40°C to +125°C (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 conversion time and averaging
10-MHz SPI communication interface
Operates from a 2.7-V to 5.5-V supply:
- Operational current: 640 µA (typical)
- Shutdown current: 5 µA (maximum)

The INA239 is an ultra-precise digital power monitor with a 16-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 INA239 reports current, bus voltage, temperature, and power, 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 INA239 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 A 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 INA239 is an ultra-precise digital power monitor with a 16-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 INA239 reports current, bus voltage, temperature, and power, 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 INA239 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 A 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	INA239 85-V, 16-Bit, High-Precision Power Monitor With SPI Interface datasheet (Rev. A)	PDF \| HTML	11.05.2022
	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
	Zertifikat	INA239EVM EU RoHS Declaration of Conformity (DoC) (Rev. A)		16.12.2020

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

INA229_239EVM — Evaluierungsmodul für INA229 und INA239

Dieses Evaluierungsmodul (EVM) ist eine benutzerfreundliche Plattform zum Evaluieren der Hauptfunktionen und der Leistung des INA229 oder INA239.

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

Benutzerhandbuch: PDF | HTML