Parameter | Design Requirement | ||
---|---|---|---|
Supply voltage | ±12 V | ||
Output voltage | 1.25 V | ||
Output current | 1 mA | ||
Output noise | < 25 nV/√Hz from 1 kHz to 10 MHz | ||
Radiation hardness | 50 kRad(Si) |
This circuit design uses a low-pass filter and an op amp to reduce the wideband noise generated by a shunt voltage reference. The circuit was originally developed to supply a CCD sensor in a satellite: the shunt reference alone does not meet the performance requirements of the application and needs the additional circuitry to meet the project requirements.