KX LM399 voltage reference version S02

Simple bootstrapped voltage reference able to provide precise 10V (or any other voltage, depending on resistor values) almost independent of changes in power supply voltage, ambient temperature and output loading. Correct zener operating current of exactly 2mA is maintained by R1, a selected 5ppm/°C or better resistor, connected to the reference regulated output. Accuracy is primarily determined by three factors:

• Temperature coefficient of zener diode.
• 1ppm/°C ratio tracking of R2 and R3 resistors
• Operational amplifier VOS offset errors.

The chopper amplifier LTC2057, with TCVOS of 0.015uV/°C, contributes only 0.0025ppm/°C of output error, thus effectively eliminating TCVOS as an error consideration.

All information is available at: https://xdevs.com/article/kx-ref