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Texas Instruments LM4128DMF-1.8/NOPB — Discrete Semiconductors

Texas Instruments LM4128DMF-1.8/NOPB Series Voltage

MPNLM4128DMF-1.8/NOPB
End of Life

Texas Instruments LM4128DMF-1.8/NOPB series voltage reference, fixed 1.8V output, ±1% tolerance, 20 mA output, SOT-23-5 package, Tape & Reel.

$3.02Ref. price · indicative, final on quote
Texas Instruments LM4128DMF-1.8/NOPB datasheet (PDF)
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM4128DMF-1.8/NOPB specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeSeries
Voltage - input2.2V ~ 5.5V
Voltage - output (Min (Fixed))1.8V
Output current20 mA
Current - supply100µA
Operating temperature-40°C ~ 125°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseSC-74A, SOT-753
Noise - 0.1Hz to 10Hz170µVp-p
Temperature coefficient100ppm/°C

Product details

1.8V fixed output — the precision side of the spec

The LM4128DMF-1.8/NOPB: Fixed 1.8V output with ±1% tolerance and a temperature coefficient of 100 ppm/°C. For a 12-bit ADC with a 1.8V reference, that noise contributes about 0.3 LSB peak-to-peak at the converter's full scale; clean enough for most industrial measurements.

Supply budget and output drive

Quiescent supply current is 100 µA typical, and it can source up to 20 mA to the load. That 20 mA is enough to bias a string of pull-ups or feed the reference input of a handful of ADCs without an external buffer.

Frequently asked questions

What is the lead time and how can I order LM4128DMF-1.8/NOPB?

Submit an RFQ with your target quantity and delivery window for a firm lead time.

How does LM4128DMF-1.8/NOPB compare to LM4132AMF-4.1/NOPB?

The LM4132AMF-4.1/NOPB is a different part — it outputs 4.096V with a tighter ±0.05% tolerance and a lower 20 ppm/°C drift, but it costs more and runs in the same SOT-23-5 package. The LM4128DMF-1.8/NOPB is the 1.8V, ±1% option. They are not pin-compatible substitutes; the output voltages differ and the tolerance grade is a different class. Choose based on your reference voltage and accuracy budget.