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Product Detailed Parameters
- Description：IC CURR SENSE 1 CIRCUIT SOT23-5
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：Current Sense
- Number of Circuits：1
- Output Type：-
- Slew Rate：2.5V/µs
- Gain Bandwidth Product：900 kHz
- Current - Input Bias：20 µA
- Voltage - Input Offset：30 µV
- Current - Supply：1.5mA
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：2.7 V
- Voltage - Supply Span (Max)：20 V
- Operating Temperature：-40°C ~ 125°C (TA)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-74A, SOT-753
- Supplier Device Package：SOT-23-5
- -3db Bandwidth：-
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Overview
The INA281A4IDBVT is a high-precision, unidirectional current-sense amplifier manufactured by Texas Instruments. It features a fixed gain of 200 V/V and operates with a common-mode voltage range from -4 V to +110 V. The device offers a bandwidth of 900 kHz, a slew rate of 2.5 V/µs, and a quiescent current of 1.5 mA. It supports supply voltages between 2.7 V and 20 V, includes an input offset voltage of ±30 µV (max), and provides a DC CMRR of 120 dB. The component is housed in a 5-pin SOT-23 package.
Feature Summary
- Supports wide common-mode voltage ranges from -4 V to +110 V for versatile high-side and low-side sensing.
- Provides high accuracy with low offset voltage and excellent common-mode rejection ratio.
- Features high-speed response capabilities suitable for fast overcurrent protection applications.
Applications
- Active antenna system mMIMO
- Macro remote radio unit
- Solenoid control
- Valve control
Procurement Notes
Verify the specific suffix 'VT' indicates tape-and-reel packaging when sourcing. Confirm the 'A4' designation corresponds to the 200 V/V gain variant. Ensure compatibility with the required operating temperature range and supply voltage specifications for the target circuit design.
Selection Notes
Select this component for applications requiring precise measurement of recirculating currents or negative common-mode voltages. The 200 V/V gain is optimal for detecting small differential signals across low-ohmic shunts while maintaining high bandwidth for rapid fault detection.
Part Context
This part belongs to the INA281 family of current-sense amplifiers designed for high-performance industrial and telecom power systems. The family distinguishes itself through a zero-drift topology that minimizes offset drift over temperature, ensuring stable performance across the specified industrial operating range.
Replacement Considerations
INA281B4IDBVT shares identical electrical characteristics but may differ in pinout configuration; verify pin mapping before substitution.
FAQ
Is the INA281A4IDBVT capable of bidirectional current sensing?
No, the INA281A4IDBVT is designed for unidirectional operation only, measuring current sourced from a power supply to a load.
What is the maximum allowable differential input voltage for this device?
The absolute maximum differential input voltage is limited to ±6 V for the INA281A5/B5 variants, but typically lower for other gains; refer to absolute maximum ratings for specific limits.
