A +0.4°C accurate high-speed remote junction temperature sensor with digital Beta correction and series-resistance cancellation in 65nm CMOS

A true remote junction temperature sensor (RTS) with 3σ accuracy of 0.4 degrees over a temperature range of -40 to 130 degrees is presented. Using a novel digital beta compensation technique and series resistance cancellation (SRC), the sensor is capable of handling parasitic BJTs buried in other SoCs on a PCB located at large distances. The IC is manufactured in a 65nm digital CMOS process.