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Maxim Sensors

Maxim Integrated sensor products include signal conditioners and sensors for ambient light and magnetic positioning. Maxim offers an industry-leading portfolio of thermal-management devices, including local- and remote-temperature sensors, fan controllers, and temperature switches.

Maxim MAX31730 3-Channel Remote Temperature Sensor

Maxim's MAX31730 3-Channel Remote Temperature Sensor monitors its own temperature and the temperatures of three external diode-connected transistors. The operating supply voltage is from 3.0V to 3.6V. Resistance cancellation compensates for high series resistance in circuit-board traces and the external thermal diode, while beta compensation corrects for temperature-measurement errors due to low-beta sensing transistors. All temperature channels have programmable temperature thresholds. When the measured temperature of a channel crosses the respective threshold, a status bit is set in the thermal status registers and the open-drain THERM output asserts. A highest temperature register allows the master to obtain the temperature of the hottest channel. The 2-wire serial interface accepts SMBus protocols (write byte, read byte, send byte, and receive byte) for reading the temperature data and programming the temperature thresholds. Any one of eight available slave addresses can be selected using the address selection input (ADD), which can be connected to ground or connected to a grounded resistor. The MAX31730 is specified for a -40°C to +125°C operating temperature range and is available in a 10-pin µMAX® and a 12-pin, 3mm x 3mm TDFN package.

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