MAX6625 Datasheet

• 9-Bit Temperature-to-Digital Converter (MAX6625)
• I²C-Compatible Serial Interface
• Up to Four Devices on a Single Bus
• Versatile Alarm Output with Programmable Trip Temperature and Hysteresis
• Low-Power Shutdown Mode
• Space-Saving TDFN or SOT23 Packages
• Lead-Free Version Available (TDFN Package)

• Fan Control
• Industrial Equipment
• System Temperature Control
• Temperature Alarms

The MAX6625 combine a temperature sensor, a programmable overtemperature alarm, and an I²C-compatible serial interface into single compact packages. They convert their die temperatures into digital values using internal analog-to-digital converters (ADCs). The result of the conversion is held in a temperature register, readable at any time through the serial interface. A dedicated alarm output, OT, activates if the conversion result exceeds the value programmed in the high-temperature register. A programmable fault queue sets the number of faults that must occur before the alarm activates, preventing spurious alarms in noisy environments. OT has programmable output polarity and operating modes.

The MAX6625 feature a shutdown mode that saves power by turning off everything but the power-on reset and the I²C-compatible interface. Four separate addresses can be configured with the ADD pin, allowing up to four MAX6625 devices to be placed on the same bus. The MAX6625P OT outputs are open drain, and the MAX6625R OT outputs include internal pullup resistors.

The MAX6625 has a 9-bit internal ADC and can function as a replacement for the LM75 in most applications.