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Texas Instruments LM385M3-1.2 — Analog & Data Acquisition

LM385M3-1.2 Shunt Voltage Reference, 1.235V, SOT-23-3, NRND

MPNLM385M3-1.2
NRND

Texas Instruments LM385M3-1.2, fixed 1.235 V shunt voltage reference, ±2.43%/+2.02% tolerance, SOT-23-3 surface-mount package, 20 mA max output current, 10 µA min cathode current, 0°C to 70°C operating range.

$1.9800Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM385M3-1.2 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))1.235V
Output current20 mA
Current - cathode10 µA
Operating temperature0°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance-2.43%, +2.02%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz60µVrms
Temperature coefficient150ppm/°C

Product details

1.235 V shunt reference — what the tolerance band means

The LM385M3-1.2 is a fixed 1.235 V shunt voltage reference in a SOT-23-3 package. The output voltage tolerance spans -2.43% to +2.02%, which translates to a worst-case output window of roughly 1.205 V to 1.260 V — tight enough for a 12-bit ADC reference in a commercial-temperature system, but not a precision metrology-grade rail.

New designs should target a pin-compatible shunt reference in the same SOT-23-3 footprint.

Cathode current and output drive

Minimum cathode current is 10 µA, which sets the lowest bias current the shunt needs to regulate. The low 10 µA floor makes this reference usable in battery-powered circuits where every microamp counts.

Housed in a SOT-23-3 package (also listed as TO-236-3 / SC-59 / SOT-23-3), this is a standard three-pin shunt reference footprint. It is not specified for industrial or automotive environments.

Frequently asked questions

Is LM385M3-1.2 obsolete?

It is not yet formally discontinued, but the manufacturer is phasing it out. Existing production runs can still source it through independent distribution against an RFQ.

What is the replacement for LM385M3-1.2?

For a drop-in replacement, look for a 1.235 V shunt reference in SOT-23-3 with a similar tolerance and 10 µA minimum cathode current. The LM385 series includes multiple voltage options; a pin-compatible sibling in the same family may serve as a second source, but no direct cross-reference is on file.