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Texas Instruments REF3120AQDBZRQ1 — Analog & Data Acquisition

REF3120AQDBZRQ1 Voltage Reference, 2.048 V, ±0.2%, AEC-Q100

MPNREF3120AQDBZRQ1
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Texas Instruments REF3120AQDBZRQ1, Automotive AEC-Q100 series voltage reference, 2.048 V fixed output, ±0.2% tolerance, 20 ppm/°C, 135 µA supply, SOT-23-3.

$1.6800Ref. price · indicative, final on quote
Texas Instruments REF3120AQDBZRQ1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

REF3120AQDBZRQ1 specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input2.098V ~ 5.5V
Voltage - output (Min (Fixed))2.048V
Output current10 mA
Current - supply135µA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.2%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 0.1Hz to 10Hz27µVp-p
Noise - 10Hz to 10kHz39µVrms
Temperature coefficient20ppm/°C

Product details

2.048 V ±0.2% — the accuracy floor for automotive ADC chains

Its ±0.2% initial tolerance sets the reference accuracy for the ADC or comparator — a 2.048 V output with a 4.096 mV worst-case error at 25 °C.

Low-frequency noise is specified at 27 µVp-p over 0.1 Hz to 10 Hz and 39 µVrms over 10 Hz to 10 kHz. For a 12-bit ADC with a 2.048 V reference, that noise contributes less than 0.5 LSB — it does not limit the converter's effective resolution. Supply current is 135 µA typical, which matters for always-on modules or battery-backed reference rails where every microamp counts.

SOT-23-3 package and automotive qualification

It is rated for production use in automotive modules, not just prototype evaluation.

Frequently asked questions

Is REF3120AQDBZRQ1 pin-compatible with REF3120AIDBZR?

Both parts share the same base product number (REF3120) and the same SOT-23-3 package. They are pin-compatible and functionally identical; the difference is the AEC-Q100 automotive qualification on the Q-suffix variant.

Does REF3120AQDBZRQ1 require an output capacitor for stability?

As a series voltage reference, the REF3120AQDBZRQ1 is stable with a small ceramic output capacitor. The datasheet recommends a 0.47 µF to 10 µF capacitor for best transient response and noise performance.