Datasheet > INA228AIDGST

INA228AIDGST

更新时间： 2024-09-26 02:52:11

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德州仪器 - TI		/
页数	文件大小	规格书
48页	2848K
描述
INA228 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Interface

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INA228AIDGST 数据手册

INA228

www.ti.com

SLYS021 – JANUARY 2021

INA228 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I²C Interface

1 Features

3 Description

•

High-resolution, 20-bit delta-sigma ADC

Current monitoring accuracy:

The INA228 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.

– 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)

The INA228 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.

•

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:

The low offset and gain drift design of the INA228

allows it to be used in precise systems that do not

±163.84 mV / ± 40.96 mV

undergo

multi-temperature

calibration

during

•

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)

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.

2 Applications

•

DC-DC converters and power inverters

Industrial battery packs

Power-over-Ethernet (PoE)

Telecom equipment

Device Information ⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA228

VSSOP (10)

3.00 mm × 3.00 mm

Enterprise servers

(1) For all available packages, see the package option

addendum at the end of the data sheet.

Power

Reference

IN+

IN-

SCL

Voltage Current

SDA

Power Energy

20 Bit

ADC

I²C

MUX

VBUS

Charge

Temp

Oscillator

Out-of-range

Threshold

ALERT

GND

Simplified Block Diagram

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product Folder Links: INA228

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与INA228AIDGST相关器件

型号	品牌	获取价格	描述	数据表
INA228AQDGSRQ1	TI	获取价格	INA228-Q1 AEC-Q100, 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Inter
INA228-Q1	TI	获取价格	INA228 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Interface
INA228-Q1_V01	TI	获取价格	INA228-Q1 AEC-Q100, 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With I2C Inter
INA229	TI	获取价格	INA229-Q1 AEC-Q100, 85-V, 20-Bit, Ultra-Precise Power/Energy/Charge Monitor With SPI Inter
INA2290	TI	获取价格	INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier
INA2290A1IDGKR	TI	获取价格	INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier
INA2290A1IDGKT	TI	获取价格	INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise, Current-Sense Amplifier
INA2290A2IDGKR	TI	获取价格	INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier
INA2290A2IDGKT	TI	获取价格	INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier
INA2290A3IDGKR	TI	获取价格	INAx290 2.7-V to 120-V, 1.1-MHz, Ultra-Precise Current Sense Amplifier

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