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Texas Instruments LM4050QCEM3-4.1/NOPB — Discrete Semiconductors
Texas Instruments

LM4050QCEM3-4.1/NOPB Shunt Reference, ±0.5%, AEC-Q100

MPNLM4050QCEM3-4.1/NOPB
End of Life

Texas Instruments LM4050QCEM3-4.1/NOPB, Automotive AEC-Q100 series, precision shunt voltage reference, fixed 4.096V output, ±0.5% tolerance, 15 mA output, 78 µA cathode current, SOT-23-3 package, -40°C to 125°C.

$2.8Ref. price · indicative, final on quote
LM4050QCEM3-4.1/NOPB datasheet
PackagingTO-236-3, SC-59, SOT-23-3
StockContact for availability
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Specifications

LM4050QCEM3-4.1/NOPB Technical Specifications
ParameterValue
SeriesAutomotive, AEC-Q100
Output typeFixed
Mounting typeSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))4.096V
Current - output15 mA
Current - cathode78 µA
Operating temperature-40°C ~ 125°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.5%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz93µVrms
Temperature coefficient50ppm/°C

Product details

Automotive-grade 4.096 V shunt reference in a SOT-23-3

The Texas Instruments LM4050QCEM3-4.1/NOPB is a precision shunt voltage reference delivering a fixed 4.096 V output with ±0.5% initial tolerance. It is part of the Automotive, AEC-Q100 series, qualified for use in under-hood and cabin electronics where temperature swings from -40°C to 125°C are routine. The shunt topology means it behaves like a Zener diode — no separate supply pin, just a cathode and anode — which simplifies PCB layout and keeps the BOM count low. Typical applications include ADC references in engine control units, sensor bias for exhaust gas or pressure transducers, and comparator thresholds in battery management systems.

What the ratings mean for your BOM

Output current is rated at 15 mA. Minimum cathode current is 78 µA.

SOT-23-3 package — field-fit and footprint

The part comes in a standard SOT-23-3 (TO-236-3 / SC-59) surface-mount package. Three pins — cathode, anode, and no-connect.

Frequently asked questions

Is LM4050QCEM3-4.1/NOPB automotive qualified?

Yes, it is part of the Automotive, AEC-Q100 series, qualified for use in automotive environments across the -40°C to 125°C temperature range.

Can LM4050QCEM3-4.1/NOPB replace a generic 4.096V shunt reference?

Yes, it is a drop-in replacement for any standard 4.096 V shunt reference in a SOT-23-3 package. The ±0.5% tolerance and 50 ppm/°C drift are typical for this class; verify that your existing design's bias resistor is set for the 78 µA minimum cathode current.

What are alternatives to LM4050QCEM3-4.1/NOPB?

The LM4132AMF-4.1/NOPB is a functional alternative with tighter tolerance (±0.05%) and lower temperature coefficient (20 ppm/°C), but it uses a series topology requiring a supply rail — it is not a direct shunt replacement. For a shunt alternative, look for other AEC-Q100 4.096 V references in SOT-23-3 from TI or Microchip.