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Texas Instruments LM385LPRE3-1-2 — Analog & Data Acquisition

LM385LPRE3-1-2 Shunt Voltage Reference, 1.235 V Fixed, ±2%

MPNLM385LPRE3-1-2
Active

Texas Instruments LM385 series, Shunt Voltage Reference, Fixed, 1.235 V, ±2%, 20 mA output, TO-226-3 / TO-92-3 (TO-226AA) Formed Leads, Through Hole, 0°C~70°C.

$0.2432Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM385LPRE3-1-2 specifications
ParameterValue
Output typeFixed
MountingThrough Hole
Reference typeShunt
Voltage - output (Min (Fixed))1.235V
Output current20 mA
Current - cathode15 µA
Operating temperature0°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±2%
CaseTO-226-3, TO-92-3 (TO-226AA) Formed Leads
Noise - 10Hz to 10kHz60µVrms
Temperature coefficient20ppm/°CTypical

Product details

1.235 V fixed shunt reference — active and in production

It delivers a stable output with a typical temperature coefficient of 20 ppm/°C and an initial tolerance of ±2%.

Output current and cathode current — bias design limits

Rated for 20 mA maximum output current, the LM385LPRE3-1-2 can supply moderate loads. The minimum cathode current is 15 µA, which sets the lower bound for the bias resistor in a shunt configuration — design the bias current above this floor to maintain regulation. The 60 µVrms noise spec (10 Hz to 10 kHz) gives a baseline for low-noise analog paths; the shunt topology itself adds no series noise, so the reference's own noise floor is the limit.

Frequently asked questions

What is the tolerance of LM385LPRE3-1-2?

The initial tolerance is ±2% at 25°C. This sets the uncalibrated accuracy floor for the reference voltage; system calibration can tighten the effective error budget.

Is LM385LPRE3-1-2 equivalent to LM385Z?

Both are part of the LM385 family of shunt references. The LM385LPRE3-1-2 is a specific tape-and-reel variant in the TO-92-3 package with formed leads. Electrical equivalence depends on the exact tolerance and temperature grade of the LM385Z variant being compared — verify the suffix against your BOM's required specs.