LM95010CIMM National Semiconductor, LM95010CIMM Datasheet - Page 16

• Manufacturer Part Number: LM95010CIMM
• Description: Digital Temperature Sensor with SensorPath Bus in MSOP8 Package
• Manufacturer: National Semiconductor

www.national.com
001 001
2.0 Register Set
2.9.3 Temperature Data Readout (Addr 11o)
The LM95010’s temperature data format is two’s complement and has 10-bits of resolution with the LSb having a weight of
0.25 ˚C. The LM95010 can resolve temperature between +127.75 ˚C and -128 ˚C, inclusive. It can measure temperatures
between +127.75 ˚C and −20 ˚C with an accuracy of
Add
Reg
15-9
2-0
5-3
Bit
6
7
8
Register
Name
Temperature
Data
Readout
Type
R/W IntSens (Internal Sensor Support). Indicates if the device supports internal temperature measurements, as
RO
R
R
R
R
+127.75 ˚C
+100.00 ˚C
Resolution. This field defines the value of 1 LSb of the Temperature Readout field in the Readout Register.
The SensorPath specification defines many different weights for the temperature LSb. The LM95010
supports a resolution of 0.25 ˚C and thus a value of 010 for this field. For a full definition of this field please
refer to the SensorPath specification.
Number of Bits. This field defines the total number of significant bits of the Temperature Readout field in the
Readout register. The total number of osignificant bits includes the number of bits representing the interger
part of the temperature data and the fractional part of it, as defined by the Resolution field. The LM95010
supports 10 bits and thus a value of 001 for this field. For a full definition of this field please refer to the
SensorPath specification.
Sign (Signed Data). Defines the type of data in the Temperature Readout field of the Readout register.
0: Unsigned, positive fixed point value.
1: Signed, 2’s complement fixed point value. (value for the LM95010)
RoutSize (Readout Register size). Defines the total size of the Readout register.
0: 16 bits. (LM95010 default)
1: 24 bits.
the LM95010 does.
0: No internal temperature measurement
1: Internal temperature sensor implemented. (value for the LM95010)
Reserved. Will always read "0".
-128.00 ˚C
-20.00 ˚C
-39.75 ˚C
-40.00 ˚C
+1.00 ˚C
+0.25 ˚C
Decimal
-0.25 ˚C
-1.00 ˚C
0 ˚C
R/
W
R
Val
(Continued)
O
R
P
MSb
MSb
Sign
Bit
15
64˚C 32˚C 16˚C 8˚C 4˚C 2˚C 1˚C
Bit
14
Bit
13
Temperature Data Format
Bit
±
12
3.0 ˚C.
01 1001 0000
00 0000 0100
00 0000 0001
00 0000 0000
10 0000 0000
11 1011 0000
11 0110 0001
11 0110 0000
01 1111 1111
11 1111 1100
Bit
11 1111 1111
11
16
Binary
Description
Bit
10
Bit
9
Bit
8
Bit
0.5
˚C
7
0.25
LSb
Bit
˚C
6
Bit
5
0
Bit
4
0
3 B0h
3FCh
1FFh
3FFh
190h
004h
001h
000h
361h
360h
200h
Hex
Reserved
Bit
3
0
Bit
2
0
Bit
1
0
LSb
Bit
0
0