2.5V shunt reference with tight ±0.1% initial tolerance
The LM4050AIM3X-2.5/NOPB is a precision shunt voltage reference from Texas Instruments, delivering a fixed 2.5 V output with an initial tolerance of ±0.1% — one of the tighter grades in the LM4050 family. The ±0.1% binning means the output sits within 2.5 mV of nominal at 25 °C, which directly sets the ADC reference or comparator threshold accuracy without external trimming.
Shunt topology and bias current trade-offs
As a shunt reference, the LM4050AIM3X-2.5/NOPB operates like a precision Zener — it sinks current through the cathode to regulate the output voltage. The minimum cathode current is 65 µA, and the maximum continuous output current is 15 mA. The designer sizes the series resistor to supply the load current plus the reference's own cathode current; below 65 µA the reference drops out of regulation, so the resistor value must be calculated for the worst-case (lowest input voltage, highest load current) to keep the reference biased. The temperature coefficient is 50 ppm/°C, which translates to 125 µV of drift per degree Celsius at the 2.5 V output.
No PCN or EOL bulletin is tied to this order code as of the current data set.