OS Temperature Sensor for PowerPGTM

A 5-bit 2.5V temperature sensor implemented in a 0.35pm CMOS technology is described. The sensor is fully differential and based on the PTAT voltage difference between 2 diodes, yet it does not require a bandga reference. The resolution is 4OC for a temperature range of 0 C to 128OC. The offset error is 12OC over the process corners. The integral nonlinearity is below 1 LSB and the differential nonlinearity is less than 1/2 LSB. The total area of the sensor is 0.192 mm2 and the maximum power dissipation is 1OmW at 2.5V.