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INA745BQWRELRQ1

TIINA745BQWRELRQ1

Texas Instruments
Current & Power Monitors & Regulators AEC-Q100 40-V 16-bi t IC-output digital
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Overview

The INA745BQWRELRQ1 is an automotive-qualified, 16-bit digital current and power monitor featuring a low-loss integrated shunt resistor and a 40V maximum input voltage. It simplifies system design by providing a functional safety-capable solution with integrated temperature sensing and a high-speed I2C interface for precise real-time energy monitoring.

Why Choose This Part

The integrated shunt resistor significantly reduces PCB footprint and eliminates the parasitic inductance and temperature drift associated with external sensing elements. It features a precision 16-bit delta-sigma ADC and a high-speed 2.94MHz I2C interface with 16 selectable addresses, allowing for high-density sensor arrays on a single bus.

Applications

Electric Vehicle Battery Management
High-side current monitoring and power calculation for secondary battery systems and 12V/24V power rails.
Automotive DC/DC Converters
Real-time load monitoring and fault detection in power conversion stages requiring AEC-Q100 compliance.
ADAS Control Units
Monitoring rail power consumption and temperature to ensure operational reliability of vision and radar processing units.
Intelligent Power Distribution
Used in smart fuse boxes to provide precise current measurements for over-current protection and diagnostics.

Key Specifications

Accuracy +/-0.1%
Function Current Monitor
Mounting Type Surface Mount
Package / Case 14-VQFN
Sensing Method High/Low-Side
Voltage - Input 2.7V ~ 5.5V
Current - Output 10mA
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 14-VQFN (5x3)

Getting Started

Start development using the INA745EVM evaluation module to interface with the TI GUI for configuration and data logging. Engineers should use the I2C interface to program the conversion times and averaging modes to balance measurement noise against system latency.

Also Consider

INA226-Q1 TITexas Instruments - Offers similar 16-bit precision and automotive qualification but requires an external shunt resistor for higher design flexibility.
INA238-Q1 TITexas Instruments - A high-precision 16-bit monitor that supports a higher common-mode voltage range up to 85V for 48V automotive systems.

Categories

Power Management > Power Monitoring ICs Automotive > EV & Power Electronics Automotive > Automotive Sensors