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INA225AQDGKRQ1

AEC-Q100, 36V, bi-directional current sense amplifier w/ four pin-selectable gain settings

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA225AQDGKRQ1
Datasheet:

INA225AQDGKRQ1 Datasheet (PDF)
Series:

Automotive, AEC-Q100
Function:

Current Monitor
Sensing Method:

High-Side
Voltage - Input:

2.7V ~ 36V
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INA225AQDGKRQ1 General Description

The INA225-Q1 is a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages that vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor that allows an external reference to be used to measure current flowing in both directions across a current-sensing resistor.

Four discrete gain levels are selectable using the two gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10 mV of full-scale, while maintaining very high accuracy measurements over the entire operating temperature range.

The device operates from a single +2.7-V to +36-V power supply, drawing a maximum of 350 µA of supply current. The device is specified over the extended operating temperature range of –40 °C to +125 °C, and is offered in a VSSOP-8 package.

Key Features

AEC-Q100 qualified:
- Temperature grade 1: –40 °C to +125 °C
- HBM ESD classification 2
- CDM ESD classification C4B
Functional Safety-Capable
- Documentation available to aid functional safety system design
Wide common-mode range: 0 V to 36 V
Offset voltage: ±150 µV (maximum, all gains)
Offset voltage drift: 0.5 µV/°C (maximum)
Gain accuracy, over temperature (maximum):
- 25 V/V, 50 V/V: ±0.15%
- 100 V/V: ±0.2%
- 200 V/V: ±0.3%
- 10-ppm/°C gain drift
Bandwidth: 250 kHz (gain = 25 V/V)
Programmable gains:
- G1 = 25 V/V
- G2 = 50 V/V
- G3 = 100 V/V
- G4 = 200 V/V
Quiescent current: 350 µA (maximum)
Package: 8-pin VSSOP

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)Current Regulation/Management	Series	Automotive, AEC-Q100
Function	Current Monitor	Sensing Method	High-Side
Accuracy	-	Voltage - Input	2.7V ~ 36V
Current - Output	-	Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount	Base Product Number	INA225