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Product Detailed Parameters
- Description：80-V, BIDIRECTIONAL 50-A ZERO-DR
- Series：Zero-Drift
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：Current Sense
- Number of Circuits：1
- Output Type：Single-Ended
- Slew Rate：2.4V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：90 µA
- Voltage - Input Offset：-
- Current - Supply：1.8mA
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：2.7 V
- Voltage - Supply Span (Max)：5.5 V
- Operating Temperature：-40°C ~ 125°C (TA)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：24-SOP (0.173", 4.40mm Width) Exposed Pad
- Supplier Device Package：24-HTSSOP
- -3db Bandwidth：350 kHz
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Overview
The INA254A3IPWAR is a bidirectional current-shunt monitor featuring an integrated 400-µΩ precision shunt resistor and a zero-drift amplifier. It supports a common-mode voltage range from –4 V to +80 V and operates on a single supply of 2.7 V to 5.5 V. The device provides a fixed gain of 75 mV/A, enabling system-level calibration with a maximum gain error of 0.5%. It handles continuous currents up to ±75 A at 25°C and ±50 A across the extended temperature range of –40°C to +125°C. Packaged in a 24-pin HTSSOP.
Feature Summary
- Integrates a low-inductance 400-µΩ shunt resistor with a zero-drift amplifier for high-accuracy measurements.
- Features enhanced PWM rejection circuitry to suppress large dv/dt signals during real-time monitoring.
- Supports bidirectional current sensing over a wide common-mode voltage range independent of supply voltage.
Applications
- 48-V motor controls
- DC/DC converters
- Medical cordless tools
- Solenoid and actuators
- Remote I/O link control
Procurement Notes
Verify the specific 'A3' suffix indicates the 75 mV/A gain configuration required for the application. Confirm the 'PWA' package designation matches the 24-pin HTSSOP form factor. Ensure the operating environment aligns with the specified thermal derating curves for continuous current handling.
Selection Notes
Select this component when high-side or low-side bidirectional current measurement is required in noisy environments. The integrated shunt eliminates external resistor tolerance issues. Verify that the 75 mV/A gain provides sufficient output swing for the target ADC input range without exceeding the supply rail limits.
Part Context
This part belongs to the INA254 family of high-voltage current-shunt monitors. The INA254 series integrates a precision shunt resistor with a zero-drift amplifier to simplify PCB layout and improve measurement accuracy compared to discrete solutions. Other variants in the series offer different gain factors such as 20 mV/A and 40 mV/A.
Replacement Considerations
INA254A1IPWAR (20 mV/A gain), INA254A2IPWAR (40 mV/A gain). These parts share identical pinouts, packages, and electrical characteristics except for the fixed internal gain factor.
