INA185A4IDRLR

Overview

The INA185A4IDRLR is a precision, high-speed current sense amplifier manufactured by Texas Instruments. It operates within a supply voltage range of 2.7 V to 5.5 V and supports an operating temperature range from -40°C to 125°C. Key electrical parameters include a maximum input offset voltage of 25 µV, a gain error of 0.07%, and a minimum common-mode rejection ratio (CMRR) of 120 dB. The device features a fixed gain of 200 V/V, a bandwidth product of 105 kHz, and a maximum quiescent current of 260 µA. It utilizes a 6-pin SOT-563 package.

Feature Summary

• Supports bidirectional current sensing with low-side capability for flexible circuit integration.
• Delivers ultra-high precision through minimized input offset voltage and drift characteristics.
• Provides high-speed performance suitable for demanding dynamic load applications.

Applications

• High-precision industrial process control systems
• Battery management systems in portable electronics
• Overcurrent protection circuits in power distribution units

Procurement Notes

Verify the specific suffix IDRLR corresponds to the intended reel packaging configuration. Confirm that the A1/A2/A3/A4 grade designation matches the required gain accuracy specifications for the target application. Ensure the SOT-563 footprint aligns with the PCB layout constraints. Cross-reference the datasheet revision date to confirm parameter stability against previous versions.

Selection Notes

Select this component when both high bandwidth and extreme precision are required in a minimal footprint. The 200 V/V fixed gain suits applications requiring significant signal amplification from small shunt voltages. Consider the 120 dB CMRR for noisy environments where common-mode noise rejection is critical. Evaluate the 260 µA quiescent current against strict power budget constraints.

Part Context

This device belongs to the INA185 family of ultra-small current sense amplifiers. It shares architectural similarities with other members like the INA185A1 and INA185A2 but differs in fixed gain settings and specific accuracy grades. The family targets space-constrained designs requiring high-speed response without sacrificing measurement fidelity.

Replacement Considerations

Direct pin-compatible substitutes within the same series include INA185A1IDRLR, INA185A2IDRLR, and INA185A3IDRLR. Verify that the alternative gain setting (e.g., 100 V/V or 50 V/V) meets the system's signal conditioning requirements before substitution.