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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 INA254A2IPWAR is a bidirectional current-shunt monitor featuring an integrated 400-µΩ precision shunt resistor and a zero-drift amplifier. It provides a fixed gain of 40 mV/A with a common-mode voltage range from –4 V to +80 V. The device operates on a single supply between 2.7 V and 5.5 V, drawing a maximum quiescent current of 2.4 mA. It supports 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 precision 400-µΩ shunt resistor with a zero-drift amplifier for system-calibrated accuracy.
- Features enhanced PWM rejection circuitry to suppress large dv/dt common-mode transients.
- Supports bidirectional current monitoring over a wide common-mode range independent of supply voltage.
Applications
- 48-V motor controls
- DC/DC converters
- Medical cordless tools
- Solenoid and actuators
Procurement Notes
Verify the specific suffix IPWAR corresponds to the 24-pin HTSSOP package and reel/cut-tape availability. Confirm the A2 designation matches the required 40 mV/A gain for the application. Ensure the component meets RoHS standards as indicated by the manufacturer documentation before finalizing procurement orders.
Selection Notes
Select this variant when a 40 mV/A gain is required for optimal ADC resolution within the specified current range. Consider the thermal derating curves if ambient temperatures exceed 85°C or if airflow is limited. Verify that the 80 V common-mode range aligns with the bus voltage requirements of the target circuit design.
Part Context
This component belongs to the INA254 family of high-voltage current-shunt monitors. Other variants include the INA254A1 (20 mV/A) and INA254A3 (75 mV/A), offering different gain options while sharing the same integrated shunt and zero-drift architecture. All versions utilize the same 24-pin HTSSOP package and electrical interface specifications.
Replacement Considerations
Direct functional substitutes within the same family include the INA254A1 and INA254A3, provided the gain difference is acceptable. Cross-family replacements require verification of pin compatibility, common-mode range, and gain specifications against the original design requirements.
