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LM385DG4-1-2

TI LM385DG4-1-2 Shunt Voltage Reference, 1.235V ±2% 8-SOIC

MPNLM385DG4-1-2
Active

Texas Instruments LM385DG4-1-2, Shunt Voltage Reference, Fixed 1.235V Output, ±2% Tolerance, 20mA Output, 60µVrms Noise, 0°C to 70°C, 8-SOIC (0.154", 3.90mm Width), Tube.

$1.3200Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM385DG4-1-2 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))1.235V
Output current20 mA
Current - cathode15 µA
Operating temperature0°C~70°C(TA)
PackageTube
Tolerance±2%
Case8-SOIC (0.154\", 3.90mm Width)
Noise - 10Hz to 10kHz60µVrms
Temperature coefficient20ppm/°CTypical

Product details

Typical applications include low-power analog bias, A/D converter reference, and comparator threshold setting in bench instruments, office equipment, and indoor industrial controls.

20 mA output, 15 µA cathode current — sizing the bias resistor

As a shunt reference, the LM385DG4-1-2 regulates by sinking current through a series resistor from the supply rail. The 20 mA maximum output current sets the load headroom; the 15 µA minimum cathode current defines the bias floor below which regulation drops out. For a given supply voltage, the series resistor must be sized to deliver at least 15 µA to the cathode while supplying the load and staying under 20 mA total — a standard two-resistor bias design for shunt references.

Active status — no LTB pressure

Frequently asked questions

What is the equivalent of LM385DG4-1-2?

The LM4132AMF-4.1/NOPB is a series reference with a tighter ±0.05% tolerance and wider temperature range (-40°C to 125°C), but it is not a direct pin-for-pin replacement — the LM385 is a shunt reference, while the LM4132 is a series device requiring a different bias topology.

What is the lead time for LM385DG4-1-2?

Lead time is confirmed at quote time against an RFQ. Standard independent distribution channels typically carry this active part; a specific lead-time number depends on current channel inventory and order quantity.

Can I replace LM385DG4-1-2 with another part?

A functional replacement depends on the circuit topology. The LM385 is a shunt reference — any replacement must also be a shunt type with the same 1.235 V output. The LM4132AMF-4.1/NOPB is a series device and would require a circuit redesign. For a shunt-to-shunt swap, look for a 1.235 V shunt reference in an 8-SOIC package with a ±2% or tighter tolerance.