LM95235 datasheet(11/25 Pages) NSC | Precision Remote Diode Temperature Sensor with SMBus Interface and TruTherm Technology

11 / 25 page

1.0 Functional Description (Continued)

1.5 TEMPERATURE DATA FORMAT

Temperature data can only be read from the Local and

Remote Temperature registers.

Remote temperature data with the digital filter off is repre-

sented by an 10-bit plus sign, two’s complement word and

11-bit unsigned binary word with an LSb (Least Significant

Bit) equal to 0.125˚C. The data format is a left justified 16-bit

word available in two 8-bit registers. Unused bits report "0".

Remote temperature data with the digital filter on is repre-

sented by a 12-bit plus sign, two’s complement word and

13-bit unsigned binary word with an LSb (Least Significant

Bit) equal to 0.03125˚C (1/32˚C). The data format is a left

justified 16-bit word available in two 8-bit registers. Unused

bits report "0".

11-bit, 2’s complement (10-bit plus sign)

Temperature

Digital Output

Binary

Hex

+125˚C

0111 1101 0000 0000

7D00h

+25˚C

0001 1001 0000 0000

1900h

+1˚C

0000 0001 0000 0000

0100h

+0.125˚C

0000 0000 0010 0000

0020h

0˚C

0000 0000 0000 0000

0000h

−0.125˚C

1111 1111 1110 0000

FFE0h

−1˚C

1111 1111 0000 0000

FF00h

−25˚C

1110 0111 0000 0000

E700h

−55˚C

1100 1001 0000 0000

C900h

11-bit, unsigned binary

Temperature

Digital Output

Binary

Hex

+255.875˚C

1111 1111 1110 0000

FFE0h

+255˚C

1111 1111 0000 0000

FF00h

+201˚C

1100 1001 0000 0000

C900h

+125˚C

0111 1101 0000 0000

7D00h

Temperature

Digital Output

Binary

Hex

+25˚C

0001 1001 0000 0000

1900h

+1˚C

0000 0001 0000 0000

0100h

+0.125˚C

0000 0000 0010 0000

0020h

0˚C

0000 0000 0000 0000

0000h

13-bit, 2’s complement (12-bit plus sign)

Temperature

Digital Output

Binary

Hex

+125˚C

0111 1101 0000 0000

7D00h

+25˚C

0001 1001 0000 0000

1900h

+1˚C

0000 0001 0000 0000

0100h

+0.03125˚C

0000 0000 0000 1000

0008h

0˚C

0000 0000 0000 0000

0000h

−0.03125˚C

1111 1111 1111 1000

FFF8h

−1˚C

1111 1111 0000 0000

FF00h

−25˚C

1110 0111 0000 0000

E700h

−55˚C

1100 1001 0000 0000

C900h

13-bit, unsigned binary

Temperature

Digital Output

Binary

Hex

+255.875˚C

1111 1111 1110 0000

FFE0h

+255˚C

1111 1111 0000 0000

FF00h

+201˚C

1100 1001 0000 0000

C900h

+125˚C

0111 1101 0000 0000

7D00h

+25˚C

0001 1001 0000 0000

1900h

+1˚C

0000 0001 0000 0000

0100h

+0.03125˚C

0000 0000 0000 1000

0008h

0˚C

0000 0000 0000 0000

0000h

Local Temperature data is represented by a 10-bit plus sign,

two’s complement word with an LSb (Least Significant Bit)

equal to 0.125˚C. The data format is a left justified 16-bit

word available in two 8-bit registers. Unused bits will always

report

"0".

Local

temperature

readings

greater

than

+127.875˚C are clamped to +127.875˚C, they will not roll-

over to negative temperature readings.

11-bit, 2’s complement (10-bit plus sign)

Temperature

Digital Output

Binary

Hex

+125˚C

0111 1101 0000 0000

7D00h

+25˚C

0001 1001 0000 0000

1900h

+1˚C

0000 0001 0000 0000

0100h

+0.125˚C

0000 0000 0010 0000

0020h

0˚C

0000 0000 0000 0000

0000h

−0.125˚C

1111 1111 1110 0000

FFE0h

−1˚C

1111 1111 0000 0000

FF00h

−25˚C

1110 0111 0000 0000

E700h

−55˚C

1100 1001 0000 0000

C900h

20174927

FIGURE 3. Digital Filter Response in a typical Intel

processor on a 65 nm or 90 nm process. The filter

curves were purposely offset for clarity.

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