STTS751-1DP3F datasheet(9/36 Pages) STMICROELECTRONICS

Part #	STTS751-1DP3F

Description	2.25 V low-voltage local digital temperature sensor

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STTS751

Functional description

Doc ID 16483 Rev 5

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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.

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