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INA240A2PWR

TIINA240A2PWR

Texas Instruments
Current Sense Amplifier 1 Circuit 8-TSSOP
Active9,980 in stock
Datasheet Digi-Key Compare Prices

Overview

The INA240A2PWR is a high-side or low-side, bidirectional current-sense amplifier specifically designed for use in switching systems. It features a zero-drift architecture and enhanced PWM rejection to provide high-accuracy current measurements even in the presence of large common-mode voltage transients.

Why Choose This Part

The device offers a very low input offset voltage of 5uV and excellent PWM rejection, minimizing the need for external filtering. Its zero-drift architecture ensures stability over the full -40C to 125C operating temperature range, while the 400kHz bandwidth supports fast control loops.

Applications

Brushless DC Motor Control
Ideal for phase current sensing in BLDC motors where PWM signals create significant common-mode noise.
Solenoid and Valve Control
Provides precise monitoring of current through inductive loads to ensure reliable actuation and fault detection.
Power Management Systems
Used in telecom and industrial power supplies for accurate current monitoring with a wide -4V to 80V common-mode range.
Actuator Control
Enables closed-loop feedback for precision linear and rotary actuators in industrial automation.

Key Specifications

Slew Rate 2V/us
Mounting Type Surface Mount
-3db Bandwidth 400 kHz
Amplifier Type Current Sense
Package / Case 8-TSSOP (0.173", 4.40mm Width)
Current - Supply 1.8mA
Number of Circuits 1
Current - Input Bias 90 uA
Operating Temperature -40degC ~ 125degC
Voltage - Input Offset 5 uV
Supplier Device Package 8-TSSOP
Voltage - Supply Span (Max) 5.5 V
Voltage - Supply Span (Min) 2.7 V

Getting Started

Evaluation can be performed using the INA240EVM development kit, which allows for quick prototyping with various shunt resistor configurations. When designing the PCB, ensure low-inductance kelvin connections to the shunt resistor and place bypass capacitors close to the 2.7V to 5.5V supply pins.

INA240A2 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Temp Range Stock
INA240A2PWR (this part) TSSOP-8 -40degC ~ 125degC 9,980
INA240A2EDRQ1 SOIC-8 -40degC ~ 150degC .. 2,240
INA240A2DR SOIC-8 -40degC ~ 125degC —
INA240A2PW TSSOP-8 -40degC ~ 125degC 914

Also Consider

INA282 TITexas Instruments - Consider this if a wider common-mode voltage range up to 80V is required with a different pinout and higher gain options.