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Texas Instruments REF3133AIDBZR — Analog & Data Acquisition

REF3133AIDBZR Voltage Reference, 3.3V Fixed, ±0.2%, SOT-23-3

MPNREF3133AIDBZR
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Texas Instruments REF3133AIDBZR series voltage reference, 3.3V fixed output, ±0.2% tolerance, 20ppm/°C drift, 10 mA output, 135 µA supply, -40°C to 125°C, SOT-23-3.

$2.4700Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

REF3133AIDBZR specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input3.35V ~ 5.5V
Voltage - output (Min (Fixed))3.3V
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 10Hz43µVp-p
Noise - 10Hz to 10kHz63µVrms
Temperature coefficient20ppm/°C

Product details

3.3V fixed reference for precision bias and ADC rails

The output noise is specified at 43 µVp-p from 0.1 Hz to 10 Hz and 63 µVrms from 10 Hz to 10 kHz, making it suitable for driving the reference input of precision ADCs or DACs in industrial and automotive signal chains.

The SOT-23-3 package (also known as TO-236-3 or SC-59) is a standard three-pin surface-mount footprint that reflows easily and occupies minimal board area. The supply current is 135 µA typical, which keeps the self-heating low even in still-air conditions.

Frequently asked questions

What is the difference between REF3133AIDBZR and REF3133AIDBZT?

The REF3133AIDBZR and REF3133AIDBZT are electrically identical parts. The difference is in the shipping packaging: the 'R' suffix indicates Tape & Reel (TR) packaging, while the 'T' suffix indicates a different reel or tube variant. Both share the same die, electrical specifications, and SOT-23-3 package.

What is the tolerance of REF3133AIDBZR?

The initial output voltage tolerance is ±0.2%.