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Product Detailed Parameters
- Description：AEC-Q100, -4-V TO 110-V BIDIRECT
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：Current Sense
- Number of Circuits：1
- Output Type：Single-Ended
- Slew Rate：8V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：35 µA
- Voltage - Input Offset：3 µV
- Current - Supply：2.5mA
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：2.7 V
- Voltage - Supply Span (Max)：20 V
- Operating Temperature：-40°C ~ 125°C (TA)
- Grade：Automotive
- Qualification：AEC-Q100
- Mounting Type：Surface Mount
- Package / Case：SOT-23-8 Thin, TSOT-23-8
- Supplier Device Package：TSOT-23-8
- -3db Bandwidth：1.1 MHz
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Overview
The INA241A3QDDFRQ1 is an AEC-Q100 qualified, bidirectional ultra-precise current sense amplifier with a gain of 50 V/V. It operates over a common-mode voltage range of -5V to 110V and supports supply voltages from 2.7V to 20V. Key electrical specifications include a maximum offset voltage of ±10µV, a typical DC CMRR of 166dB, and a small-signal bandwidth of 1.1MHz at all gains. The device features enhanced PWM rejection for switching systems, drawing a typical quiescent current of 2.5mA.
Feature Summary
- Enhanced PWM rejection circuitry minimizes output signal disturbance caused by large common-mode voltage transients in switching systems.
- Ultra-precise measurement capability achieved through low input offset voltage and high DC common-mode rejection ratio.
- Bidirectional operation allows accurate current sensing across a wide common-mode voltage range independent of the supply voltage.
Applications
- Electric power steering (EPS)
- eTurbo/charger
- Starter/generator
- Regenerative braking
- Brake system
Procurement Notes
Verify the specific suffix QDDFRQ1 corresponds to the SOT-23-8 package and automotive Grade 1 qualification (-40°C to 125°C). Confirm that the 'Q1' designation aligns with AEC-Q100 requirements for your target application. Ensure the ordering code matches the exact gain version required for your design.
Selection Notes
Select this component when high precision is required in high-voltage bidirectional environments. The 50 V/V gain suits applications needing moderate amplification of shunt resistor drops. Consider the 1.1MHz bandwidth for fast over-current detection. Verify thermal performance within the SOT-23-8 package if operating near temperature limits.
Part Context
This part belongs to the INA241x-Q1 family of ultra-precise current sense amplifiers designed for automotive use. It shares core architecture with other gain variants like INA241A1-Q1 and INA241A4-Q1 but offers a fixed 50 V/V gain. The family is characterized by zero-drift topology and robust common-mode handling capabilities.
Replacement Considerations
INA241A3IDDFR: Non-automotive grade equivalent with identical electrical specifications and pinout. INA241A3QDRQ1: Automotive grade alternative packaged in SOIC-8 instead of SOT-23-8. Verify package compatibility and thermal dissipation requirements before substitution.
