INA333QDGKRQ1

Overview

The INA333QDGKRQ1 is an automotive-grade, low-power, zero-drift precision instrumentation amplifier manufactured by Texas Instruments. It operates on a single supply voltage ranging from 1.8 V to 5.5 V with a quiescent current of 50 µA. The device features a maximum input offset voltage of 25 µV and a drift of 0.1 µV/°C at gains greater than or equal to 100. It provides a minimum common-mode rejection ratio of 96 dB at gains greater than or equal to 10. Gain is programmable from 1 to 1000 using a single external resistor. The component is housed in an 8-pin VSSOP package and is specified for operation within a temperature range of –40°C to +125°C.

Feature Summary

• Features RFI filtered inputs with integrated protection resistors to enhance signal integrity in electrically noisy environments.
• Utilizes internal autocalibration techniques to maintain high DC precision and minimize low-frequency noise over the operating temperature range.
• Supports gain configuration via a single external resistor using a standard industry equation.

Applications

• Powertrain torque sensor
• Powertrain pressure sensor
• Vehicle occupant detection sensor

Procurement Notes

Verify that the specific ordering suffix matches the required package type and tape-and-reel specifications. Confirm compliance with AEC-Q100 standards for the target automotive application environment. Ensure the design accounts for the functional safety documentation availability if the system requires certification. Validate thermal performance against the junction-to-ambient resistance values provided in the datasheet.

Selection Notes

Select this component for applications requiring high precision in battery-powered or low-voltage automotive systems. The low quiescent current makes it suitable for energy-constrained designs. Consider the input bias current requirements when interfacing with high-impedance sensors. Verify that the required gain setting allows for stable operation without excessive parasitic capacitance at the gain pins.

Part Context

This part belongs to the INA333-Q1 family of instrumentation amplifiers designed specifically for automotive use. It shares architectural similarities with the commercial INA333 but includes qualification for harsh automotive environments. The device integrates laser-trimmed resistors to ensure consistent performance across production batches.

Replacement Considerations

INA333QDRQ1