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Texas Instruments LM4040D41IDBZT — Analog & Data Acquisition

LM4040D41IDBZT Shunt Voltage Reference, 4.096 V ±1%

MPNLM4040D41IDBZT
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Texas Instruments LM4040D41IDBZT, precision shunt voltage reference, fixed 4.096 V output, ±1% tolerance, 150 ppm/°C, SOT-23-3 surface-mount package, -40°C to 85°C operating range.

$1.3600Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4040D41IDBZT specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))4.096V
Output current15 mA
Current - cathode88 µA
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz80µVrms
Temperature coefficient150ppm/°C

Product details

4.096 V shunt reference in SOT-23-3

It operates as a two-terminal shunt (Zener-like) device, requiring only a single external resistor to set the bias current from the supply rail. The SOT-23-3 package fits tight PCB layouts where a dedicated reference IC is needed for an ADC reference, comparator threshold, or DAC scaling.

Bias current and resistor sizing

The LM4040D41IDBZT requires a minimum cathode current of 88 µA to maintain regulation; the maximum continuous cathode current is 15 mA. The external series resistor must be chosen so that the current through the reference stays within this window over the full supply and load range. At 4.096 V output, a 1 kΩ resistor from a 5 V rail delivers roughly 900 µA — well above the 88 µA floor and below the 15 mA ceiling, leaving headroom for load transients.

Temperature drift and noise floor

For a 12-bit ADC with a 4.096 V reference (1 mV per LSB), this drift contributes less than 1 LSB of error across temperature — acceptable for most industrial and instrumentation designs.

Frequently asked questions

What is LM4040D41IDBZT's tolerance?

The initial tolerance is ±1%. This means the output voltage at 25°C is between 4.055 V and 4.137 V. For tighter accuracy, the LM4040 family offers A-grade (±0.1%) and B-grade (±0.2%) variants in the same SOT-23-3 footprint.

How do I get current pricing and availability for LM4040D41IDBZT?

Submit an RFQ through this listing with your target quantity and target price; availability is verified against current distributor inventory and open-market supply. No stock-holding claim is made here — each order is sourced to your BOM line.