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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).
MAX6690 Datasheet
