Datasheet

STTS751 Functional description
Doc ID 16483 Rev 5 9/36
2 Functional description
The STTS751 digital temperature sensor acquires the temperature and stores it in the
temperature register. The resolution is programmable which allows the host controller to
select the optimal configuration between sensitivity and conversion times. The STTS751
can be placed in standby mode to minimize power consumption.
The user can control the update rate of the temperature measurements via the configuration
register (Table 15 on page 17). Sample rates can be adjusted from once every 16 seconds
up to 32 samples per second, in powers-of-2 steps.
These devices also offer a one-shot feature. When the device is in the standby mode, writing
to the one-shot register initiates a single temperature conversion. The result is compared
with the limit registers, and the outputs updated accordingly. Then the device returns to the
standby mode. Operating the device in this mode allows for very low average power
consumption, thereby making this device ideal for low power applications.
The device supports the SMBus Alert Response address (ARA) protocol. The ARA is polled
by the controller (host) device that supports this protocol whenever it detects that the
EVENT
pin has been asserted. The STTS751 will respond with its device address (refer to
Section 3.8 on page 12).
The STTS751 contains 16 registers. The register summary is shown in Table 9 on page 13.
Using register addresses not specified in the table may result in an incorrect response.
These registers and their functions are described in more detail in the following sections.