In Focus: Data Hold Time for Temperature Sensors with High Speed I2C Interface

An integrated Digital Temperature Sensor with a High Speed I
²
C interface (HS I
²
C DTS) is designed, simulated and SI implemented in a 0.18μm EEPROM CMOS process. The system operates for power supply voltages from 1.6V to 3.6V and temperatures from -40°C to 125°C. The simulation results of HS I
²
C DTS with a proposed digital output buffer with open drain output stage exhibit a maximum data hold time of 60ns, being twice as fast as the system with the standard topology of the output buffer. Two encapsulated HS I
²
C DTS were measured in the same conditions. The experimental results of the data hold time for the entire system are between 61.13…85.74ns.