I would like to ask you two questions about your TMP422 chip:
1. Is the TMP422 temperature detection circuit shown in the attached picture correct? (The triode model used is: TR PNP MMBT2907A-60V 0.6A SOT23 PANJIT)
2. What the TMP422 in the accessory circuit actually detects is the temperature of the two triode Q1/Q2? Or the ambient temperature around the chip? Or other temperature, please help answer, thank you very much!
Dear，
1: I don't find wrong points in your schematic, and I suppose that you may take advice Figure 12. TMP422 Basic Connections form the datasheet.
2: Actually, it can do with microcontrollers, microprocessors, or FPGAs, you can see similar parts TMP451
Furthermore, link below may be helps.
