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Texas Instruments LM4040D50IDBZT — Analog & Data Acquisition

LM4040D50IDBZT Shunt Voltage Reference, 5V ±1%, SOT-23-3

MPNLM4040D50IDBZT
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Texas Instruments LM4040D50IDBZT, shunt voltage reference, fixed 5V output, ±1% tolerance, 80 µVrms noise, SOT-23-3 package, -40°C to 85°C.

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

Specifications

LM4040D50IDBZT specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))5V
Output current15 mA
Current - cathode95 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

Fixed 5V shunt reference in a SOT-23-3

It is a three-terminal device that behaves like a Zener diode — it regulates the voltage across itself by shunting current through the cathode. The ±1% initial tolerance and 80 µVrms noise over 10 Hz to 10 kHz make it a workhorse reference for general-purpose ADC biasing, comparator thresholds, and power-supply monitoring in industrial and consumer designs.

The 5V output is fixed — no external trim resistors. The shunt architecture means you need a series resistor from the supply to the cathode to set the bias current; the cathode current range is 95 µA minimum to 15 mA maximum. Keep the bias current above 95 µA to stay in regulation, and size the resistor so the total current (load + reference) stays under 15 mA.

Frequently asked questions

Can the LM4040D50IDBZT replace the LM4040D50?

The LM4040D50IDBZT is a specific ordering code within the LM4040 family. The base product number is LM4040, and the suffix indicates package and tape/reel options. As long as the package (SOT-23-3) and tolerance (±1%) match your BOM, it is a direct functional replacement for other LM4040D50 variants in the same package.