LM95245EB/NOPB National Semiconductor, LM95245EB/NOPB Datasheet - Page 8

• Manufacturer Part Number: LM95245EB/NOPB
• Description: BOARD EVALUATION FOR LM95245
• Manufacturer: National Semiconductor
• Series: PowerWise®, TruTherm®r

Specifications of LM95245EB/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: No
• Utilized Ic / Part: LM95245
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM95245EB

3.0 Functional Description
The LM95245EVAL/NOPB Evaluation Board,
along with the SensorEval Software, provides the
system designer with a convenient way to learn
about the operation of the LM95245 Temperature
Sensor chip. The user simply has to install the
SensorEval software on his PC, run it, connect the
USB cable from the PC to the Evaluation Board, and
the user can read the temperatures. It’s that simple!
The user doesn’t have to provide any power or
external signals to the evaluation board.
Power to the LM95245EVAL/NOPB Evaluation
Board is taken from the USB 5-Volt line. This +5
3.1 LM95245 Evaluation Board Connections and Table
© Copyright 2007
National Semiconductor Corporation
Temp Sensor input
To Remote Diode
To Q 1 2 N 3904
Remote Diode
4
3
Sensor
2
1
ALERT#/OS#/A0
TCRIT#
3.3VDC
GND
SDA
SCL
8
For LM95235 and LM95245 Only.
JP2
J6
VDC is the input to the on-board LM2950 low
dropout voltage regulator, which regulates the output
voltage to +3.3 VDC. This output voltage powers
the LM95245, the on-board microcontroller, and the
EEPROM chip where the board ID information is
stored.
The microcontroller provides the SMBus Clock
(SMBCLK) signal and the SMBus Data (SMBDAT)
signal to the LM95245 chip. This communication
between the LM95245 and the PC USB data lines is
controlled by the microcontroller. For all of the
details of this communication protocol see the latest
LM95245 datasheet, available at www.national.com.
See table for A0 Input
1
2
3
4
5
6
Do Not
Power .
Apply
Only .
Test
Pins
selection
J5
.
.
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