INA186A5IYFDR

Overview

The INA186A5IYFDR is a bidirectional, low-power, zero-drift current-sense amplifier from Texas Instruments. It features a fixed gain of 500 V/V and operates with a supply voltage range of 1.7 V to 5.5 V. The device supports common-mode voltages from -0.2 V to +40 V. Key electrical specifications include a typical quiescent current of 48 µA, an input bias current of 0.5 nA, and a minimum common-mode rejection ratio of 120 dB. It is housed in a DSBGA-6 package.

Feature Summary

• Zero-drift architecture ensures low offset voltage and drift for high precision across temperature ranges.
• Capacitively coupled input stage provides extremely low input bias current to minimize measurement errors.
• Integrated enable pin allows the device to enter a low-power shutdown state with reduced supply current.
• Wide dynamic range capability supports accurate sensing of microamp-level currents using larger sense resistors.

Applications

• Standard notebook PC power management
• Smartphone battery monitoring
• Consumer battery charger systems
• Baseband unit (BBU) current sensing

Procurement Notes

Verify the specific suffix IYFDR corresponds to the DSBGA-6 package with the ENABLE pin functionality as documented in the datasheet. Confirm that the A5 designation matches the required 500 V/V gain for your circuit design. Ensure compatibility with the specified operating temperature range of -40°C to +125°C for your application environment.

Selection Notes

Select this component when high accuracy at low current levels is critical due to its nanoampere input bias current. The 500 V/V gain is suitable for detecting small voltage drops across shunt resistors. Consider the DSBGA package size constraints and the necessity of the enable pin for power management in portable devices compared to other INA186 variants.

Part Context

This part belongs to the INA186 family of current-sense amplifiers designed for low-power applications. Unlike higher-voltage counterparts such as the INA241 or INA310, the INA186 is optimized for 40-V common-mode limits and ultra-low quiescent current consumption. It serves as a specialized solution for portable electronics where battery life and precision are paramount.

Replacement Considerations

INA186A5DDFVR: SOT-23-THIN package variant with similar electrical characteristics.

FAQ

Does the INA186A5IYFDR support bidirectional current sensing?

Yes, the YFD package includes an ENABLE pin but lacks a REF pin. Without a REF pin, the internal reference node is grounded, which typically configures the device for unidirectional sensing unless external circuitry modifies the input configuration.

What is the maximum common-mode voltage supported by this device?

The INA186A5IYFDR supports a common-mode voltage range from -0.2 V to +40 V, independent of the supply voltage.