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Texas Instruments LM4040C25IDBZRG4 — Analog & Data Acquisition

Texas Instruments LM4040C25IDBZRG4 Shunt Reference

MPNLM4040C25IDBZRG4
End of Life

Texas Instruments LM4040C25IDBZRG4, precision shunt voltage reference, 2.5V fixed output, ±0.5% tolerance, 100 ppm/°C temperature coefficient, 35 µVrms noise, SOT-23-3 package, -40°C to 85°C.

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

Specifications

LM4040C25IDBZRG4 specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Reference typeShunt
Voltage - output (Min (Fixed))2.5V
Output current15 mA
Current - cathode80 µA
Operating temperature-40°C~85°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

The Texas Instruments LM4040C25IDBZRG4 is a precision shunt voltage reference delivering a fixed 2.5 V output with ±0.5 % initial tolerance.

Tolerance, drift, and noise — the accuracy budget

The ±0.5 % tolerance at 25 °C sets the initial voltage to 2.5 V ±12.5 mV. That is the floor for a 12-bit ADC's LSB — you keep the full code range without a trim pot in production. Temperature coefficient is 100 ppm/°C. For a 14-bit converter that drift eats into the top and bottom codes — budget for it in the system error analysis. Noise spec is 35 µVrms over the 10 Hz to 10 kHz band. That is quiet enough to feed a 16-bit SAR ADC without an external RC filter in most industrial signal chains.

Package and pinout — SOT-23-3 footprint facts

Three-pin SOT-23-3 (TO-236-3 / SC-59) surface-mount package. The pinout is standard for the LM4040 family: cathode, anode, and no-connect. The 15 mA maximum output current and 80 µA minimum cathode current define the bias resistor range for the shunt configuration.

Frequently asked questions

Is LM4040C25IDBZRG4 a surface mount device?

Yes. It comes in the SOT-23-3 surface-mount package (also listed as TO-236-3 or SC-59).

What is the tolerance of LM4040C25IDBZRG4?

±0.5 % initial tolerance at 25 °C. That is the 'C' grade in the LM4040 family — tighter than the 'I' (±1 %) and 'D' (±0.1 %) options.

What is a direct equivalent or replacement for LM4040C25IDBZRG4?

The LM4040 family is pin-compatible across the voltage and tolerance grades. A same-footprint alternative with the same 2.5 V output and ±0.5 % tolerance is the LM4040C25IDBZR (the non-G4 RoHS suffix).