ds2436b Maxim Integrated Products, Inc., ds2436b Datasheet - Page 11

• Manufacturer Part Number: ds2436b
• Description: Ds2436 Battery Id/monitor Chip
• Manufacturer: Maxim Integrated Products, Inc.

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 V
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:
The MSB of the Temperature Register contains the integer portion of the temperature valve.
TEMPERATURE/DATA RELATIONSHIPS Table 1
MSB
S
TEMPERATURE
+25.0625°C
-25.0625°C
2
+125 °C
+1/2°C
6
-1/2°C
-55°C
0°C
2
5
2
4
2
3
DIGITAL OUTPUT (Binary)
2
2
01111101 00000000
00011001 00010000
00000000 10000000
00000000 00000000
11111111 10000000
11100110 11110000
11001001 00000000
2
1
2
0
Unit =1°C
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2
-1
2
-2
2
-3
DD
DIGITAL OUTPUT (Hex)
.
2
-4
2
-5
7B00
E6F0
C900
FF80
1910
0080
0000
0
0
LSB
0