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Texas Instruments LM4051AIM3X-ADJ — Analog & Data Acquisition

LM4051AIM3X-ADJ Shunt Voltage Reference, ±0.1%, Adjustable

MPNLM4051AIM3X-ADJ
Obsolete

Texas Instruments LM4051AIM3X-ADJ, precision shunt voltage reference, adjustable output 1.212 V to 10 V, ±0.1% tolerance, 50 ppm/°C, 20 µVrms noise, SOT-23-3, tape and reel.

$4.1300Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4051AIM3X-ADJ specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output10 V
Voltage - output (Min (Fixed))1.212V
Output current12 mA
Current - cathode65 µA
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR)
Tolerance±0.1%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz20µVrms
Temperature coefficient50ppm/°C

Product details

Adjustable shunt reference — ±0.1% tolerance buys you 12-bit margin

The ±0.1% initial tolerance and 50 ppm/°C temperature coefficient keep the reference stable enough for 12-bit ADC systems without external trimming.

12 mA output, 65 µA cathode — low-power shunt for battery rails

Rated for 12 mA continuous output current with a minimum cathode current of 65 µA. The low quiescent draw suits battery-powered instrumentation where every microamp counts; the 12 mA ceiling handles most precision reference loads including multiple op-amp bias networks.

20 µVrms noise — clean enough for 12-bit, marginal for 16-bit

Output noise is specified at 20 µVrms over 10 Hz to 10 kHz. That places the reference comfortably inside the noise budget for a 12-bit ADC with a 2.5 V full-scale; for 16-bit designs you will want to add a post-filter or step up to a lower-noise series reference.

SOT-23-3 — footprint matches industry-standard shunt references

The pinout is shared by many adjustable shunt references from multiple vendors, simplifying board-level replacement if an alternate source is qualified.

Frequently asked questions

Is LM4051AIM3X-ADJ obsolete?

Yes, Texas Instruments lists LM4051AIM3X-ADJ as obsolete. No official successor part number has been published. Sourcing is limited to existing inventory in the independent channel.

What is the accuracy of LM4051AIM3X-ADJ?

Initial tolerance is ±0.1%, and the temperature coefficient is 50 ppm/°C. This combination supports 12-bit precision without external calibration.