INA159AIDGKR

Overview

The INA159AIDGKR is a precision differential amplifier manufactured by Texas Instruments, featuring a fixed gain of 0.2 V/V for level translation applications. It operates within a supply voltage range of 1.8 V to 5.5 V and draws a typical quiescent current of 1.1 mA per channel. The device offers a gain-bandwidth product of 1.5 MHz and a slew rate of 15 V/µs. Key electrical specifications include an input offset voltage of 100 µV, an input bias current of 315 nA, and a common-mode rejection ratio (CMRR) of 80 dB. It supports a common-mode voltage range extending down to -12.5 V and provides an output short-circuit current capability of 60 mA per channel.

Feature Summary

• Fixed internal gain of 0.2 V/V designed specifically for translating high-voltage signals to lower logic levels.
• Wide common-mode input voltage range that extends below ground potential to accommodate negative common-mode conditions.
• Rail-to-rail output capability ensures maximum dynamic range in low-voltage single-supply systems.

Applications

• Translating high-side current sense voltages to microcontroller-compatible ADC input ranges.
• Interface circuits for connecting high-voltage sensors to low-voltage data acquisition systems.
• Signal conditioning stages in battery management systems requiring level shifting.

Procurement Notes

Verify the specific suffix 'KR' indicates tape-and-reel packaging when ordering. Confirm the 'A' grade designation matches required offset voltage tolerances for your application. Ensure the VSSOP-8 package footprint aligns with your PCB layout constraints. Check for moisture sensitivity labeling if storage conditions exceed factory limits.

Selection Notes

Select this component when a precise attenuation factor of 0.2 is required without external resistor networks. It is suitable for designs needing wide common-mode rejection and rail-to-rail output swing. Consider the 1.5 MHz bandwidth for signal frequencies up to several hundred kilohertz. Evaluate the 1.1 mA supply current against total system power budgets.

Part Context

This part belongs to the INA159 family of precision difference amplifiers from Texas Instruments. It is distinct from programmable gain variants like the INA145 due to its fixed internal gain structure. The device integrates matched resistors to ensure high accuracy and CMRR without external components, simplifying the design of level-shifting interfaces.

Replacement Considerations

The INA159AIDGKT is the tray-packaged equivalent of this reel-based component. Other parts in the series may offer different gain values or pinouts; verify functional compatibility before substitution.

FAQ

What is the common-mode voltage range of the INA159AIDGKR?

The device supports a common-mode voltage range that extends from -12.5 V up to the positive supply rail, allowing it to handle negative common-mode signals.

Does the INA159AIDGKR have adjustable gain?

No, the INA159AIDGKR has a fixed internal gain of 0.2 V/V and does not support external gain adjustment.