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INA745AIRELR

TIINA745AIRELR

Texas Instruments
Current & Power Monitors & Regulators 40V 16bit high-prec ision I2C output dig
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Overview

The INA745AIRELR is a 16-bit high-precision digital current and power monitor with an integrated shunt resistor, designed for common-mode voltages up to 40V. This I2C-compatible device simplifies power measurement by eliminating the need for external sense resistors, providing accurate current, voltage, and power readings in a compact 14-VQFN package.

Why Choose This Part

The integrated shunt resistor minimizes PCB layout complexity and reduces errors caused by temperature coefficients and trace resistance. With a high-resolution 16-bit ADC and a programmable precision oscillator, it provides reliable 0.1 percent accuracy for demanding power management tasks.

Applications

Industrial Battery Management
Monitoring state-of-charge and health in 24V or 36V industrial battery packs with high precision.
Enterprise Server Infrastructure
Real-time power monitoring for individual blade servers or rack-mount power distribution units.
Telecom Power Delivery
Ensures reliable power usage tracking in high-availability telecommunications hardware.
Grid Infrastructure
Precise power monitoring for smart grid nodes and energy distribution equipment.

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 35A
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 14-VQFN (5x3)

Getting Started

To evaluate the part, use the INA745EVM evaluation module and connect it to a microcontroller via the I2C bus. Configure the internal registers for conversion time and averaging to optimize the trade-off between measurement noise and response speed.

Also Consider

INA226 TITexas Instruments - A standard choice for high-side monitoring that requires an external shunt for flexible current ranges.
INA228 TITexas Instruments - Offers a higher 20-bit resolution and supports common-mode voltages up to 85V.
PAC1954 MCHPMicrochip Technology - A multi-channel power monitor suitable for applications requiring simultaneous monitoring of up to four rails.