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Texas Instruments LM4041AIM3-1.2 — Analog & Data Acquisition

LM4041AIM3-1.2 Shunt Voltage Reference, 1.225V ±0.1%

MPNLM4041AIM3-1.2
Obsolete

Texas Instruments LM4041AIM3-1.2, precision shunt voltage reference, fixed 1.225V output, ±0.1% tolerance, 20µVrms noise, 100ppm/°C drift, SOT-23-3 package, -40°C to 85°C.

$3.1000Ref. price · indicative, final on quote
Texas Instruments LM4041AIM3-1.2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4041AIM3-1.2 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))1.225V
Output current12 mA
Current - cathode65 µA
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.1%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz20µVrms
Temperature coefficient100ppm/°C

Product details

The LM4041AIM3-1.2 is a precision shunt voltage reference from Texas Instruments, delivering a fixed 1.225V output with ±0.1% initial tolerance. It operates as a two-terminal shunt regulator — the cathode current sets the reference voltage across the load, with a minimum cathode current of 65 µA and a maximum output current of 12 mA. The 20 µVrms noise (10 Hz to 10 kHz) and 100 ppm/°C temperature coefficient make it suitable for precision analog circuits: ADC references, comparator thresholds, and regulator feedback dividers where a stable 1.225V rail is needed.

The ±0.1% initial accuracy means the output voltage at 25 °C is within 1.225V ±1.225 mV — tight enough for a 12-bit ADC reference without external trimming. For a calibration lab or an industrial sensor interface, this drift sets the system accuracy floor.

SOT-23-3 footprint — board-level fit

The three-pin footprint is standard: cathode, anode, and no-connect. No special thermal pad or exposed paddle — the shunt reference dissipates through the leads and the copper pad area on the board.

Frequently asked questions

Is LM4041AIM3-1.2 obsolete?

Yes, the LM4041AIM3-1.2 is listed as Obsolete. No official replacement part is documented. For a BOM that requires this exact reference, the supply path is surplus or broker stock.

What is the tolerance of LM4041AIM3-1.2?

The initial tolerance is ±0.1%.

Can LM4041AIM3-1.2 be used in ADC reference circuits?

Yes. The 1.225V output, ±0.1% accuracy, 20 µVrms noise, and 100 ppm/°C drift are suitable as a reference for 12-bit or lower-resolution ADCs, provided the 12 mA maximum output current meets the ADC reference input current requirements.