Design Consideration in High Temperature Analog CMOS Integrated Circuits

The design of CMOS analog integrated circuits to be operated at elevated junction temperatures is discussed. Considerations which have successfully been implemented in the design of basic analog cells for operation over the 25°-250°C range are emphasized. Simple models arc presented along with the temperature dependencies of key design parameters. These models and high-temperature trends represent sufficient information for first-order hand analysis prior to computeraided design.