DS2436 Просмотр технического описания (PDF) - Maxim Integrated

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DS2436

Battery ID/Monitor Chip

Maxim Integrated 

DS2436

TEMPERATURE REGISTERS (60h-61h)

The DS2436 can measure temperature without external components. The resulting temperature

measurement is placed in a two-byte Temperature Register. This register is implemented in SRAM, and

therefore will hold data until the battery voltage falls below minimum VDD.

The temperature reading is provided in a 13-bit, two’s complement format, with 0.03125°C resolution.

Table 1 describes the exact relationship of output data to measured temperature. The data is transmitted

serially over the 1-Wire interface. The DS2436 can measure temperature over the range of -40°C to

+85°C in 0.03125°C increments. For Fahrenheit usage, a lookup table or conversion factor must be used.

Note that temperature is represented in the DS2436 in terms of a 0.03125°C LSB, yielding the following

13-bit format:

MSB

LSB

S 26 25 24 23 22 21 20

2-1 2-2 2-3 2-4 2-5 0

0

0

Unit =1°C

The MSB of the Temperature Register contains the integer portion of the temperature valve.

TEMPERATURE/DATA RELATIONSHIPS Table 1

TEMPERATURE

DIGITAL OUTPUT (Binary)

+125 °C

01111101 00000000

+25.0625°C

00011001 00010000

+1/2°C

00000000 10000000

0°C

00000000 00000000

-1/2°C

11111111 10000000

-25.0625°C

11100110 11110000

-55°C

11001001 00000000

DIGITAL OUTPUT (Hex)

7B00

1910

0080

0000

FF80

E6F0

C900

11 of 29

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