I’m using a TMP442A with a diode connected 2N3904 via about 3 inches of wire.
Most 2N3904 devices give me an accurate reading, but the occasional one reads 30 or even 70 degrees higher than it should.
These devices still respond to temperature changes, but with a gross offset. They measure OK on a DVM i.e. a silicon junction.
Any ideas / help / suggestions would be very welcome.
Thanks & regards,