REF3120AQDBZRQ1

Product Overview

REF3120AQDBZRQ1 from Texas Instruments is a series voltage reference IC that provides a fixed 2.048 V output from a 2.098 V to 5.5 V input. The device is specified for a 10 mA output current and a 135 µA supply current, with a tolerance of ±0.2% and a temperature coefficient of 20 ppm/°C. It is housed in a surface-mount SOT-23-3 package and is rated for operation from -40°C to 125°C. The component is specified as automotive grade and AEC-Q100 qualified.

Key Features

• Fixed 2.048 V series voltage reference output with ±0.2% tolerance.
• 20 ppm/°C temperature coefficient across the -40°C to 125°C operating range.
• 2.098 V to 5.5 V input range.
• 10 mA specified output current with 135 µA supply current.
• Noise of 27 µVp-p from 0.1 Hz to 10 Hz and 39 µVrms from 10 Hz to 10 kHz.
• Surface-mount SOT-23-3 package with AEC-Q100 automotive qualification.

Applications

• Analog-to-digital converter reference for precision measurement channels.
• Sensor signal conditioning using a fixed 2.048 V reference.
• Automotive electronic subsystems requiring an AEC-Q100 qualified voltage reference.
• Battery-powered instrumentation with a 135 µA supply current reference.

Design & Procurement Notes

When selecting REF3120AQDBZRQ1, confirm that the available input voltage remains within 2.098 V to 5.5 V and that the required load current is compatible with the specified 10 mA output current. Because the output is fixed at 2.048 V, system scaling must be designed around this value rather than an adjustable reference. The ±0.2% tolerance and 20 ppm/°C coefficient should be included in the measurement error budget, while the 27 µVp-p and 39 µVrms noise figures help determine suitability for sensitive analog paths. The SOT-23-3 surface-mount package supports compact layouts, and the AEC-Q100 qualification should be considered where automotive-grade requirements apply.