MAX6690 Datasheet PDF | Maxim Integrated

Maxim Integrated MAX6690

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. The remote junction can also be a common-collector PNP, such as a substrate PNP of a microprocessor (µP).

Part No.	MAX6690
Datasheet	MAX6690 Download
Manufacturer	Maxim Integrated
Description	2C Accurate Remote/Local Temperature Sensor
Buy	Stock & Price

GENERAL DESCRIPTION

Remote accuracy is ±2°C for multiple transistor manufacturers, with no calibration needed. The 2-wire serial interface accepts standard System Management Bus (SMBusTM), Write Byte, Read Byte, Send Byte, and Receive Byte commands to program the alarm thresholds and to read temperature data. Measurements can be done automatically and autonomously, with the conversion rate programmed by the user, or programmed to operate in a single-shot mode. The adjustable conversion rate allows the user to optimize supply current and temperature update rate to match system needs. When the conversion rate is faster than 1Hz, the conversion results are available as a 7-bitplus-sign byte with a 1°C LSB. When the conversion rate is 1Hz or slower, the MAX6690 enters the extended mode. In this mode, 3 additional bits of temperature data are available in the extended resolution register, providing 10-bit-plus-sign resolution with a 0.125°C LSB. Single-shot conversions also have 0.125°C per LSB resolution when the conversion rate is 1Hz or slower.