8.192 V fixed shunt — what it anchors
The LM4040B82IDCKR is a fixed 8.192 V shunt voltage reference from Texas Instruments' LM4040 family. The shunt topology uses a two-terminal Zener-like behavior.
Tolerance and drift — the calibration story
At ±0.2% initial tolerance, this B-grade part holds the output to within about 16 mV at 25 °C without trimming. That combination puts it in the class of references suitable for industrial sensor conditioning and data-acquisition paths where a few LSBs of drift are tolerable but a generic Zener would wander too far.
Noise floor for the signal chain
The 130 µVrms noise spec (10 Hz to 10 kHz) is typical for a bandgap-based shunt at this voltage. If the downstream ADC has a 100 µV LSB at 12 bits, this reference contributes about 1.3 LSBs of noise — acceptable for most industrial control loops but worth a bypass cap at the reference output pin to knock down the wideband component.
Package fit and board-level reality
The SC-70-5 (SOT-353) footprint is a 5-pin surface-mount package. The supplier device package is SC-70-5.
The base product number LM4040 spans multiple voltage options and tolerance grades.