Skip to main content
Log in
Texas Instruments LM4040C25QDBZRG4 — Analog & Data Acquisition

TI LM4040C25QDBZRG4 Shunt Reference, 2.5 V ±0.5%, SOT-23-3

MPNLM4040C25QDBZRG4
End of Life

Texas Instruments LM4040C25QDBZRG4 precision shunt voltage reference, fixed 2.5 V output, ±0.5% tolerance, 100 ppm/°C drift, 15 mA output current, SOT-23-3 package, -40°C to 125°C.

$0.6100Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4040C25QDBZRG4 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))2.5V
Output current15 mA
Current - cathode80 µA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR)
Tolerance±0.5%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz35µVrms
Temperature coefficient100ppm/°C

Product details

2.5 V shunt reference, ±0.5% — what the tolerance buys you

The LM4040C25QDBZRG4 is a fixed 2.5 V shunt reference from TI's LM4040 family. It delivers a stable output with ±0.5% initial accuracy and a 100 ppm/°C temperature coefficient, making it a fit for ADC references, comparator thresholds, and regulator feedback dividers that need better than 1% end-of-life accuracy.

Shunt topology — the resistor matters more than you think

Being a shunt reference, it sinks current through a series resistor from the supply. The cathode current range is 80 µA minimum to 15 mA maximum — size the bias resistor so the device always sees at least 80 µA at minimum supply and maximum load, or the output drops out of regulation. That's clean enough for a 12-bit ADC reference; for 16-bit or higher, you'll want to add a band-limiting capacitor across the device.

TI lists the LM4040C25QDBZRG4 as Active.

Frequently asked questions

What is the tolerance of LM4040C25QDBZRG4?

Initial tolerance is ±0.5%. Combined with the 100 ppm/°C drift, the total error over -40°C to 125°C stays under roughly 1.5% worst-case, which is fine for 8- to 10-bit accuracy budgets.

What package does LM4040C25QDBZRG4 come in?

It ships in a SOT-23-3 surface-mount package (also listed as TO-236-3 / SC-59). The supplier device package is SOT-23-3, and the delivery form is Tape & Reel.