INA240A4QPWRQ1

Overview

The INA240A4QPWRQ1 is a high/low side, bi-directional zero-drift current sense amplifier with enhanced PWM rejection. It operates within a wide common-mode voltage range of -4 V to 80 V and supports a supply voltage from 2.7 V to 5.5 V. Key electrical parameters include a gain of 200 V/V, a common-mode rejection ratio (CMRR) of 132 dB, and an input offset voltage of 5 µV. The device features a 3dB bandwidth of 400 kHz, a slew rate of 2 V/µs, and a settling time of 9.8 µs. It draws 2.4 mA of operating current and is housed in an 8-TSSOP package.

Feature Summary

• Zero-drift architecture ensures high precision by minimizing offset voltage drift over temperature and time.
• Enhanced PWM rejection provides high-level suppression for high common-mode transients in pulse-width modulated systems.
• Bi-directional sensing capability allows accurate current measurement in both directions across the shunt resistor.

Applications

• Automotive electronic control units requiring AEC-Q100 qualified components
• High-side current monitoring in motor drive circuits
• Battery management systems with bidirectional current flow
• Solenoid driver applications accommodating flyback periods

Procurement Notes

Verify the specific suffix 'PWR' confirms the TSSOP-8 package and tape-and-reel shipping format. Confirm the 'Q1' designation indicates AEC-Q100 automotive qualification status. Ensure the 'A4' grade matches the required gain accuracy specifications for your design. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision level before procurement.

Selection Notes

Select this component when high precision is required in noisy environments with significant common-mode voltage swings up to 80 V. The zero-drift technology is suitable for applications demanding low offset voltage stability without external trimming. Consider the 200 V/V gain for high sensitivity measurements. Verify that the 8-TSSOP package fits the PCB layout constraints and that the thermal performance meets the system's power dissipation requirements under maximum load conditions.

Part Context

This device belongs to the INA240 family of current sense amplifiers designed for robust performance in harsh electrical environments. The Q1 variant specifically targets automotive applications, adhering to strict reliability standards defined by AEC-Q100. It complements other members of the series by offering a specific gain configuration and package type optimized for space-constrained automotive electronics while maintaining high common-mode rejection capabilities.

Replacement Considerations

INA240A4PW serves as a non-automotive grade alternative with identical electrical characteristics but lacks AEC-Q100 certification. INA240A4QDRQ1 offers the same functionality in an SOIC-8 package instead of TSSOP-8. Ensure pin compatibility and thermal resistance differences are evaluated when substituting these variants.