MAX6654MEE [Maxim]

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. It features high accuracy ±1°C (max) from +70°C to +100°C, 11-bit resolution with 0.125°C LSB, dual channel for remote and local temperature measurement, no calibration required, programmable under/overtemperature alarms, I2C-compatible/SMBus interface, and a +3V to +5.5V supply range. The device uses a 2-wire serial interface for programming and reading temperature data, with automatic or single-shot conversion modes. It also includes parasitic resistance cancellation for improved accuracy.