Skip to main content
Log in
Texas Instruments LM4040D30QDBZRG4 — Analog & Data Acquisition

TI LM4040D30QDBZRG4 Shunt Voltage Reference, 3V ±1%

MPNLM4040D30QDBZRG4
End of Life

Texas Instruments LM4040D30QDBZRG4 precision shunt voltage reference, fixed 3V output, ±1% tolerance, 35µVrms noise, 15 mA output, -40°C to 125°C, SOT-23-3 package, Tape & Reel.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4040D30QDBZRG4 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))3V
Output current15 mA
Current - cathode82 µA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR)
Tolerance±1%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz35µVrms
Temperature coefficient150ppm/°C

Product details

Its ±1% initial tolerance and 35µVrms noise (10Hz to 10kHz) make it a clean voltage anchor for an ADC reference input or a comparator threshold divider in an industrial sensor interface. The shunt topology means the reference sinks current through an external resistor from a higher supply rail; the cathode current floor is 82 µA, and the maximum output current is 15 mA. That 15 mA ceiling sets the load budget — if the reference feeds multiple ADC inputs or a low-impedance divider, the total load current plus the quiescent cathode current must stay under 15 mA.

Temperature range and package — where it fits

The temperature coefficient is 150 ppm/°C — typical for a standard-grade shunt reference.

Frequently asked questions

What is the tolerance of LM4040D30QDBZRG4?

±1% initial tolerance. This is a standard precision grade for a shunt reference; it is suitable for general-purpose ADC references, comparator thresholds, and bias supplies where 1% accuracy is sufficient.

Can LM4040D30QDBZRG4 replace LM4040D30IDBZR?

Both are 3V shunt references in SOT-23-3 with the same electrical specifications (tolerance, noise, tempco, output current). The suffix difference (Q vs I) may indicate a different temperature range or qualification level — the LM4040D30QDBZRG4 is rated -40°C to 125°C. Confirm the operating temperature requirement of your application before substituting.