AS6221-EK Evaluation Kit Ams OSRAM AS6221-EK Evaluation Kit is a simple PCB that enables a straightforward evaluation of the ams OSRAM AS6221 Digital Temperature Sensors. AS6221 Digital Temperature Sensors consist of a Si-bandgap temperature sensor, an ADC and a digital signal processor. The AS6221 Digital Temperature Sensors communicate with other devices via a 2-wire digital bus.