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Texas Instruments REF3140AIDBZR — Analog & Data Acquisition

REF3140AIDBZR Texas Instruments Voltage Reference

MPNREF3140AIDBZR
Active

Texas Instruments REF3140AIDBZR series voltage reference, 4.096 V fixed output, ±0.2% tolerance, 20 ppm/°C drift, 135 µA supply, SOT-23-3, -40°C to 125°C.

$2.9700Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

REF3140AIDBZR specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input4.146V ~ 5.5V
Voltage - output (Min (Fixed))4.096V
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 10Hz53µVp-p
Noise - 10Hz to 10kHz78µVrms
Temperature coefficient20ppm/°C

Product details

4.096 V fixed reference in SOT-23-3

It is designed for precision ADC and DAC bias rails, sensor excitation, and general-purpose reference circuits where a stable, low-noise voltage is needed over temperature.

Temperature drift and noise floor

Low-frequency noise is specified at 53 µVp-p (0.1 Hz to 10 Hz) and 78 µVrms (10 Hz to 10 kHz), making it suitable for 12- to 14-bit data acquisition without an external filter.

Supply headroom and load drive

Input voltage range is 4.146 V to 5.5 V, so the reference needs at least 50 mV of headroom above the 4.096 V output. Output current is rated at 10 mA, enough to bias multiple ADC reference inputs or a small resistive divider chain. Quiescent supply current is 135 µA, which keeps the power budget lean in battery-operated designs.

Frequently asked questions

Is REF3140AIDBZR obsolete or end-of-life?

No, the REF3140AIDBZR is listed as active. There is no indication of an impending EOL or last-time-buy from Texas Instruments.

What is the tolerance of REF3140AIDBZR?

Initial tolerance is ±0.2%. This is a mid-grade accuracy level suitable for 12-bit systems; for 16-bit designs you would typically look at ±0.05% or better references.

Is REF3140AIDBZR RoHS compliant?

The REF3140AIDBZR is supplied in a RoHS-compliant SOT-23-3 package. No lead or restricted substances above the threshold are present in the bill of materials.