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LM4132 Precision Voltage Reference

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by Ray

Precision series (3-terminal) voltage reference with 0.05% accuracy and low drift.

voltage-referenceseriesprecisionlow-drifttisot-23-5
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LM4132

Texas Instruments · Voltage Reference · SOT-23-5

The LM4132 is a precision series (3-terminal) voltage reference with 0.05% initial accuracy and low temperature coefficient. Unlike a shunt reference, it regulates its output actively with low quiescent current, providing a stable reference for ADCs, DACs, and precision measurement in fixed voltage grades.

Pinout

Pin Name Type Function
1 N/C unconnected No connect pin, leave floating.
2 GND power_in Device ground return.
3 EN input Enable pin. VIH ≥ 65% of VIN enables the reference; VIL ≤ 35% of VIN puts the device in shutdown (IQ_SD ≈ 3 µA typ).
4 VIN power_in Input supply. Operating range from VREF + 400 mV up to 5.5 V (absolute max 6 V). CIN required for stability.
5 VREF power_out Precision reference output. Factory-set to 1.8, 2.048, 2.5, 3, 3.3, or 4.096 V depending on grade. Sources up to 20 mA (25 mA for LM4132-3.3-Q1); COUT optional, stable with low-ESR ceramics.

Key specifications

Parameter Value
Type Series (3-terminal) voltage reference
Initial accuracy 0.05% (A grade)
Temperature coefficient 10 ppm/C max
Output grades 1.8 / 2.048 / 2.5 / 3.0 / 3.3 / 4.096 V
Supply current 60 uA typ
Supply voltage Vout + 0.4 V to 5.5 V
Operating temperature -40 C to 125 C

Ordering variants

Same part, different packaging or reel option.

  • LM4132DBV

CAD (KiCad official)

  • Symbol: lm4132.kicad_sym
  • Footprint: lm4132.kicad_mod
  • 3D model: SOT-23-5 body from KiCad Package_TO_SOT_SMD/SOT-23-5.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (44 pp, sha256 4bd8402ff026fdf1, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF