LM95235EVAL/NOPB National Semiconductor, LM95235EVAL/NOPB Datasheet - Page 11

• Manufacturer Part Number: LM95235EVAL/NOPB
• Description: BOARD EVALUATION LM95235
• Manufacturer: National Semiconductor
• Series: PowerWise®, TruTherm®r

Specifications of LM95235EVAL/NOPB

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 125°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1°C
• Voltage - Supply: 3 V ~ 3.6 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: LM95235
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM95235EVAL

processor on a 65 nm or 90 nm process. The filter curves
1.5 TEMPERATURE DATA FORMAT
Temperature data can only be read from the Local and Re-
mote 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".
Temperature
Temperature
FIGURE 3. Digital Filter Response in a typical Intel
+255.875°C
+0.125°C
−0.125°C
+0.125°C
+125°C
+255°C
+201°C
+125°C
+25°C
−25°C
−55°C
+25°C
+1°C
−1°C
+1°C
0°C
0°C
11-bit, 2's complement (10-bit plus sign)
were purposely offset for clarity.
11-bit, unsigned binary
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0010 0000
0000 0000 0000 0000
1111 1111 1110 0000
1111 1111 0000 0000
1110 0111 0000 0000
1100 1001 0000 0000
1111 1111 1110 0000
1111 1111 0000 0000
1100 1001 0000 0000
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0010 0000
0000 0000 0000 0000
Binary
Binary
Digital Output
Digital Output
20174927
7D00h
FFE0h
C900h
FFE0h
C900h
7D00h
1900h
0100h
0020h
0000h
FF00h
E700h
FF00h
1900h
0100h
0020h
0000h
Hex
Hex
11
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.
1.6 SMBDAT OPEN-DRAIN OUTPUT
The SMBDAT output is an open-drain output and does not
have internal pull-ups. A “high” level will not be observed on
this pin until pull-up current is provided by some external
source, typically a pull-up resistor. Choice of resistor value
depends on many system factors but, in general, the pull-up
resistor should be as large as possible without effecting the
SMBus desired data rate. This will minimize any internal tem-
perature reading errors due to internal heating of the
LM95235. The maximum resistance of the pull-up to provide
a 2.1V high level, based on LM95235 specification for High
Temperature
Temperature
Temperature
+0.03125°C
−0.03125°C
+255.875°C
+0.03125°C
+0.125°C
−0.125°C
+125°C
+255°C
+201°C
+125°C
+125°C
+25°C
−25°C
−55°C
+25°C
+25°C
−25°C
−55°C
+1°C
−1°C
+1°C
+1°C
−1°C
0°C
0°C
0°C
13-bit, 2's complement (12-bit plus sign)
11-bit, 2's complement (10-bit plus sign)
13-bit, unsigned binary
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0000 1000
0000 0000 0000 0000
1111 1111 1111 1000
1111 1111 0000 0000
1110 0111 0000 0000
1100 1001 0000 0000
1111 1111 1110 0000
1111 1111 0000 0000
1100 1001 0000 0000
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0000 1000
0000 0000 0000 0000
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0010 0000
0000 0000 0000 0000
1111 1111 1110 0000
1111 1111 0000 0000
1110 0111 0000 0000
1100 1001 0000 0000
Binary
Binary
Binary
Digital Output
Digital Output
Digital Output
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7D00h
FFF8h
C900h
FFE0h
C900h
7D00h
7D00h
FFE0h
C900h
1900h
0100h
0008h
0000h
FF00h
E700h
FF00h
1900h
0100h
0008h
0000h
1900h
0100h
0020h
0000h
FF00h
E700h
Hex
Hex
Hex