19-2190; Rev 0; 10/01
2°C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface
General Description
The MAX6690† is a precise digital thermometer that reports the temperature of both a remote P-N junction and its own die.
The remote junction can be a diode-connected
transistor—typically a low-cost, easily mounted 2N3904
NPN type or 2N3906
PNP type—that replaces conventional thermistors or thermocouples.
Remote accuracy is ±2°C for multiple
transistor manufacturers, with no calibration needed.
The remote junction can also be a common-collector
PNP, such as a substrate
PNP of a microprocessor (µP).
The 2-wire serial interface accepts standard System Management Bus (SMBusTM), Wr...