General Description

The MAX6654† 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 ±1°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). 

Features

♦ High Accuracy ±1°C (max) from +70°C to +100°C

   (Remote)

♦ 11-Bit, 0.125°C Resolution

♦ Dual Channel: Measures Remote and Local

   Temperature

♦ No Calibration Required

♦ Programmable Under/Overtemperature Alarms

♦ I2C™-Compatible/SMBus Interface

♦ +3V to +5.5V Supply Range

Applications

   Desktop Computers

   Notebook Computers

   Servers

   Thin Clients

   Workstations

   Test and Measurement

   Multichip Modules