Si7060 Data Sheet 2 The Si7060 family of I C temperature sensors features high conversion speed (143 sec FEATURES typical), programmable over or under temperature interrupt, and interrupt polarity with 200 msec (typical) sampling time. Better than 1 C accuracy The output works as a comparator, that is, the output pin will go high or low with each Better than 0.1 C repeatability new temperature sample. The output is setup to be open drain to support wire-OR with Wide operating voltage: 1.7 to 5.5 V multiple sensors or components. Low power consumption: 500 nA The Si7060 powers up with a nominal temperature threshold of 79.8C and reset thresh- Ultra-low power sleep mode: 50 nA old of 75C, but these values are programmable. I2C interface Configurable alert output The operation of the Si7060 is similar to industry standard parts, but offers lower power 2 and in many cases higher accuracy. It is also capable of operating in autonomous sam- 4 factory configurable I C addresses pling mode. Package Options: SOT23-5 Applications: Asset Tracking HVAC/R Battery Protection Thermostats Industrial Controls White Goods Computer Equipment silabs.com Building a more connected world. Preliminary Rev. 0.1 This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Not Recommended for New DesignsSi7060 Data Sheet Functional Description 1. Functional Description 2 The Si7060 family of I C temperature sensors measure and digitize the local temperature at the device. 4 modes of operation are pos- sible: Sleep Mode: This ultra-low power mode of operation is useful when temperature measurements are made infrequently and the lowest possible pow- 2 er is desired. In this mode, the part will remain in sleep mode until it receives a command over I C to wake up and make a measure- ment. After this measurement, the part will go back to sleep. The sleep bit is the master bit. Once this bit is set, the sensor enters its sleep mode regardless of the other register configurations. 2 Once the part is woken up by I C, all registers are loaded to their default value, except for 0xC6 and 0xC7, which can be saved by the usestore bit. How to Configure: sleep = 1 stop = X sltimeena = X Autonomous Sampling Mode: In this mode of operation, the device will make measurements at a factory set rate of 5 Hz (every 200 ms). By default the part enters the Autonomous Sampling Mode upon powerup. The sensor wakes up, performs a temperature conversion, updates the output accord- ingly, and then goes back to sleep. How to Configure: sleep = 0 stop = 0 sltimeena = 1 (default state after wake-up) Active Mode: In this mode of operation, measurements can be commanded, and the numerical value of the temperature can be read. How to Configure: sleep = 0 stop = 0 sltimeena = X oneburst = 1 The stop bit will be set to 1 once the measurement is complete. Table 1.1. Summary of Different States Mode Sleep Stop Sltimeena Sleep 1 x x Autonomous 0 0 1 The output pin is designed to be an open drain output, which allows you to connect multiple devices in parallel to trigger an alert. The output is driven low once the temperature crosses the operate point, and released once it goes below the release point. The tempera- ture operate and release points are factory set to 80 C and 75 C but these values can be adjusted by setting the bit usestore to 1 and adjusting the data in registers 0xC6 and 0xC7 as will be described later. It is possible to adjust the output pin polarity so it goes high or low as temperature increases. silabs.com Building a more connected world. Preliminary Rev. 0.1 2 Not Recommended for New Designs