MAX6694

The MAX6694 is specified for a -40°C to +125°C operating temperature range and is available in 16-pin TSSOP and 5mm x 5mm thin QFN packages. The 2-wire serial interface supports the standard system management bus (SMBus?)protocols: write byte, read byte, send byte, and receive byte for reading the temperature data and programming the alarm thresholds. The MAX6694 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to four external diode-connected transistors. When the measured temperature of a channel exceeds the respective threshold, a status bit is set in one of the status registers. Two open-drain outputs of MAX6694, OVERT and ALERT, assert corresponding to these bits in the status register. All temperature channels have programmable alert thresholds. Channels 1 and 4 also have programmable overtemperature thresholds.

The features of MAX6694 can be summarized as (1)four thermal-diode inputs; (2)beta compensation (channel 1); (3)local temperature sensor; (4)1.5°C remote temperature accuracy (+60°C to +100°C); (5)temperature monitoring begins at POR for failsafe system protection; (6)ALERT and OVERT outputs for interrupts, throttling, and shutdown; (7)STBY input for hardware standby mode; (8)small, 16-pin TSSOP and TQFN packages; (9)2-wire SMBus interface.

The absolute maximum ratings of MAX6694 are (1)VCC, SMBCLK, SMBDATA, ALERT, OVERT, STBY to GND: -0.3V to +6.0V; (2)DXP_ to GND: -0.3V to (VCC + 0.3V); (3)DXN_ to GND: -0.3V to +0.8V; (4)SMBDATA, ALERT, OVERT current: -1mA to +50mA; (5)DXIV_ current: ±1mA; (6)continuous power dissipation (TA = +70°C)16-pin TQFN, 5mm x 5mm (derate 33.3mW/°C above +70°C): 2666.7mW / 16-pin TSSOP (derate 11.1mW/°C above +70°C): 888.9mW; (7)junction-to-case thermal resistance (JC)16-pin TQFN: 2°C/W / 16-pin TSSOP: 27°C/W; (8)junction-to-ambient thermal resistance (JA)16-pin TQFN: 30°C/W / 16-pin TSSOP: 90°C/W; (9)ESD protection (all pins, human body model): ±2kV; (10)operating temperature range: -40°C to +125°C; (11)junction temperature: +150°C; (12)storage temperature range: -65°C to +150°C; (13)lead temperature (soldering, 10s): +300°C.