Skip to main content
Log in
Texas Instruments REF3033AIDBZRG4 — Analog & Data Acquisition

Texas Instruments REF3033AIDBZRG4 Voltage Reference

MPNREF3033AIDBZRG4
End of Life

Texas Instruments REF3033 series, REF3033AIDBZRG4, fixed 3.3V series voltage reference, ±0.2% tolerance, 25 mA output, 50 µA supply, 36 µVp-p noise, -40°C to 125°C, SOT-23-3 package.

$1.4200Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

REF3033AIDBZRG4 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input3.35V ~ 5.5V
Voltage - output (Min (Fixed))3.3V
Output current25 mA
Current - supply50µA
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 10Hz36µVp-p
Noise - 10Hz to 10kHz105µVrms
Temperature coefficient75ppm/°C

Product details

The REF3033AIDBZRG4: It is designed for applications that need a stable, low-noise reference for an ADC, DAC, or regulator feedback divider without an external resistor divider. The 0.1 Hz to 10 Hz noise is 36 µVp-p, and the 10 Hz to 10 kHz noise is 105 µVrms — figures that place it in the mid-tier precision band, adequate for 12-bit to 14-bit signal chains where the reference noise contribution stays below 1 LSB.

50 µA quiescent — sized for always-on and battery rails

The supply current is 50 µA typical. The input voltage range is 3.35 V to 5.5 V. Output current is rated at 25 mA, enough to bias a handful of ADC reference inputs or an op-amp front end without an external buffer.

Frequently asked questions

What is the output voltage of REF3033AIDBZRG4?

Voltage reference output is the primary selection criterion.

Is REF3033AIDBZRG4 obsolete?

Designs require active parts; obsolete parts cause costly redesign.

What is the price and availability of REF3033AIDBZRG4?

Pricing and stock are critical for BOM costing and procurement.

Where can I buy REF3033AIDBZRG4?

Buyers need authorized distributors to ensure genuine parts.

What is the tolerance of REF3033AIDBZRG4?

Accuracy affects circuit performance and calibration.

What are equivalent parts to REF3033AIDBZRG4?

Alternatives are needed for second sourcing or if out of stock.