STTS75

Operation

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2.7

Temperature data format

Table 4 shows the relationship between the output digital data and the external temperature

for 12-bit resolution.

11-bit, and 12-bit depending upon the resolution bits RC1, RC0 (Bits 6 and 5) in the

Configuration Register (see Table 7 on page 17). The default resolution is 9-bits.

The left-most bit in the output data stream controls temperature polarity information for each

conversion. If the Sign Bit is '0', the temperature is positive and of the Sign Bit is '1', the

temperature is negative.

2.8

Bus timeout feature

The STTS75 supports an SMSBus compatible timeout function which will reset the serial

between a START and STOP condition. If this occurs, the device will release the bus and

wait for another START condition.

Table 4.

Relationship between temperature and digital output

Temperature

Digital

output

(HEX)

Sign

Number of Bits used by

Conversion Resolution

910

11

12

Always

Zero

12-Bit Resolution

0000

11- Bit Resolution

0

0000

10-Bit Resolution

0

0

0000

9-Bit Resolution

0

0

0

0000

+125°C

0

111

1101

0

0

0

0

0000

7D00

+25.0625°C

0

001

1001

0

0

0

1

0000

1910

+10.125°C

0

000

1010

0

0

1

0

0000

0A20

+0.5°C

0

000

0000

1

0

0

0

0000

0080

0°C

0

000

0000

0

0

0

0

0000

0000

–0.5°C

1

111

1111

1

0

0

0

0000

FF80

–10.25°C

1

111

0101

1

1

1

0

0000

F5E0

–25.0625°C

1

110

0110

1

1

1

1

0000

E6F0

–55°C

1

100

1001

0

0

0

0

0000

C900