INA181A2IDBVR

Overview

The INA181A2IDBVR is a single-channel, bidirectional current-sense amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 5.5 V and supports a common-mode voltage from -0.2 V to +26 V. The device features a fixed gain of 50 V/V, a bandwidth of 350 kHz, and a slew rate of 2 V/µs. It draws 260 µA of supply current and functions across an operating temperature range of -40°C to 125°C. Packaged in a SOT-23-6 surface-mount case, it provides rail-to-rail output.

Feature Summary

• Supports bidirectional current sensing with input common-mode voltage extending below ground to -0.2 V.
• Integrates precision matched resistors for a fixed gain of 50 V/V to minimize gain error and drift.
• Enables low-side or high-side monitoring within a wide 26 V common-mode voltage range.
• Delivers rail-to-rail analog voltage output compatible with microcontrollers and ADCs.

Applications

• Battery management systems requiring charge and discharge current monitoring
• Industrial process control loops for load cell and sensor signal conditioning
• Power supply overcurrent protection circuits
• Automotive electronic control units for motor drive current feedback

Procurement Notes

Verify the specific suffix IDBVR confirms the SOT-23-6 package and tape-and-reel shipping format. Confirm the A2 grade designation matches the required 50 V/V gain specification for your design. Ensure the component meets RoHS3 compliance requirements for your manufacturing region. Cross-reference the manufacturer part number against authorized distributor catalogs to avoid counterfeit sources.

Selection Notes

Select this component when a fixed 50 V/V gain is necessary for precise current measurement without external resistor networks. Choose this part if the application requires bidirectional sensing capability within a 26 V common-mode window. Consider this device for space-constrained designs due to its compact SOT-23-6 footprint. Verify that the 260 µA quiescent current aligns with the system's power budget constraints.

Part Context

This device belongs to the INA181 family of low-cost, precision current-sense amplifiers. It shares architectural similarities with the INA180 but offers a six-pin configuration compared to the five-pin variant. The series is designed to replace discrete resistor-based solutions, providing improved accuracy and thermal stability. It serves as a cost-effective alternative to higher-performance amplifiers in standard industrial applications.

Replacement Considerations

ZXCT181A2W6-7 by Diodes Incorporated is documented as a similar substitute option.