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Texas Instruments REF2940AIDBZT — Analog & Data Acquisition

REF2940AIDBZT 4.096V Series Voltage Reference, SOT-23-3

MPNREF2940AIDBZT
End of Life

Texas Instruments REF2940AIDBZT, series voltage reference, fixed 4.096 V output, ±2% tolerance, 59 µA supply current, SOT-23-3 package, -40°C to 125°C operating temperature.

$1.54Ref. price · indicative, final on quote
Texas Instruments REF2940AIDBZT datasheet (PDF)
PackagingTO-236-3, SC-59, SOT-23-3
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

REF2940AIDBZT specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input4.146V ~ 5.5V
Voltage - output (Min (Fixed))4.096V
Output current25 mA
Current - supply59µA
Operating temperature-40°C ~ 125°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±2%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 0.1Hz to 10Hz45µVp-p
Noise - 10Hz to 10kHz128µVrms
Temperature coefficient100ppm/°C

Product details

Fixed 4.096 V reference in a SOT-23-3

The Texas Instruments REF2940AIDBZT is a series voltage reference that outputs a fixed 4.096 V with ±2% initial tolerance. It draws 59 µA quiescent supply current and operates over -40°C to 125°C, making it a fit for industrial sensor interfaces, data-acquisition front-ends, and automotive modules where a stable 4.096 V rail is needed for an ADC or DAC reference. The SOT-23-3 package (SC-59, TO-236-3 compatible) keeps board area small and suits reflow assembly.

Frequently asked questions

Is REF2940AIDBZT a drop-in replacement for REF2940AIDBZ?

The REF2940AIDBZT and REF2940AIDBZ share the same SOT-23-3 package and fixed 4.096 V output. The 'T' suffix typically indicates Tape & Reel packaging. Mechanically and functionally they are the same die; the T suffix is a reel-pack option, not a specification change. Verify the reel quantity matches your line needs.

What is the output tolerance of REF2940AIDBZT over temperature?

The initial tolerance is ±2% at 25°C. The temperature coefficient is 100 ppm/°C, which adds drift of roughly ±4 mV over the full -40°C to 125°C range. For tighter drift, a 20 ppm/°C reference like the LM4132AMF-4.1/NOPB would be a closer match.

What are the alternatives to REF2940AIDBZT if it goes end of life?

The LM4132AMF-4.1/NOPB is a functional alternative with the same 4.096 V output in a SOT-23-3 package. It offers tighter tolerance (0.05%) and lower drift (20 ppm/°C) but draws higher supply current (100 µA). No EOL notice exists for the REF2940AIDBZT today.