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Texas Instruments LM4040C30ILPE3 — Analog & Data Acquisition

LM4040C30ILPE3 Voltage Reference, 3 V Fixed, ±0.5%, TO-92-3

MPNLM4040C30ILPE3
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Texas Instruments LM4040C30ILPE3 precision shunt voltage reference, fixed 3 V output, ±0.5% tolerance, 35 µVrms noise, 100 ppm/°C, TO-92-3 through-hole package, -40°C to 85°C.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4040C30ILPE3 specifications
ParameterValue
Output typeFixed
MountingThrough Hole
Reference typeShunt
Voltage - output (Min (Fixed))3V
Output current15 mA
Current - cathode82 µA
Operating temperature-40°C~85°C(TA)
PackageBulk
Tolerance±0.5%
CaseTO-226-3, TO-92-3 (TO-226AA)
Noise - 10Hz to 10kHz35µVrms
Temperature coefficient100ppm/°C

Product details

3 V fixed shunt reference — ±0.5% tolerance, 35 µVrms noise

The Texas Instruments LM4040C30ILPE3 is a precision shunt voltage reference with a fixed 3 V output, ±0.5% initial tolerance, and 35 µVrms noise over a 10 Hz to 10 kHz bandwidth. It operates as a two-terminal shunt (like a Zener) and requires only a single external resistor to set the bias current. The 82 µA cathode current keeps the shunt leg dissipation low, making this reference suitable for portable or low-power analog sections where a clean 3 V rail is needed for an ADC reference or comparator threshold.

TO-92-3 through-hole — prototyping and retrofit

Housed in a TO-226-3 (TO-92-3) through-hole package, the LM4040C30ILPE3 is a drop-in for breadboard prototyping, low-volume builds, or replacing an older three-lead reference on a legacy board. The through-hole format simplifies hand assembly and rework compared to surface-mount alternatives.

No official successor or pin-compatible cross-reference is recorded in the manufacturer documentation. The LM4040 family includes multiple voltage options and tolerance grades; if a tighter ±0.1% or a different output voltage is needed, a sibling within the same TO-92-3 footprint is a straightforward swap.

Frequently asked questions

What is the closest pin-compatible alternative to LM4040C30ILPE3?

Within the LM4040 family, any fixed-voltage variant in the same TO-92-3 package (e.g., 2.5 V, 4.096 V) shares the same pinout and footprint. For a tighter ±0.1% tolerance, the LM4040A30ILPE3 is a direct drop-in. No cross-reference outside the family is documented.