The Texas Instruments TL4050C41IDBZT is a precision shunt voltage reference delivering a fixed 4.096 V output with ±0.5% initial tolerance. As a shunt reference, it behaves like a Zener diode — it requires an external series resistor to set the bias current. The cathode current is 73 µA typical, and the device can sink up to 15 mA, so the resistor value is chosen to keep the current within that window across the supply and load range.
The 4.096 V output is a common full-scale voltage for ADCs with a 4.096 V reference input. The ±0.5% tolerance is adequate for general-purpose measurement and control.