Texas Instruments LM75AEB Manuale utente
User’s Guide
July 2012
LM75AEB User’s Guide
July2012 LM75AEB User’s Guide 1
CONTENTS
1
INTRODUCTION....................................................................................................... 1
2
SETUP....................................................................................................................... 1
3
BOARD LAYOUT ..................................................................................................... 8
4
SCHEMATIC........................................................................................................... 10
LIST OF FIGURES
1 I2C 7-bit Slave Address............................................................................................. 2
2 Three Least Significant Bits.......................................................................................2
3 LM75AEB Board Block Diagram................................................................................ 2
4 Top Assembly Layer.................................................................................................. 4
5 Top Layer Routing ..................................................................................................... 5
6 Bottom Layer Routing................................................................................................ 5
7 LM75AEB Schematic................................................................................................. 6
LIST OF TABLES
1 Device and Package Configurations.......................................................................... 1
2 I2C Address User Setting .......................................................................................... 2
3 LM75AEB Bill of Materials ....................................................................................... 11
1. Introduction
The Texas Instruments LM75AEB evaluation board (EB) helps designers evaluate the operation and
performance of the LM75A, an industry-standard digital temperature sensor with an integrated Sigma-Delta
analog-to-digital converter and I
2
C interface. The LM75A provides 9-bit digital temperature readings with an
accuracy of ±2°C from -25°C to 100°C and ±3°C over -55°C to 125°C.
The EVM contains one Digital Temperature Sensor (See Table 1).
Table 1: Device and Package Configurations
TEMP SENSOR IC PACKAGE
U6A1 LM75AIM SOP-8
2. Setup
This section describes the jumpers and connectors on the LM75AEB as well and how to properly connect, set
up and use the LM75AEB.
Setup
2 LM75AEB User’s Guide July 2012
2.1. Input/Output Connector Description
JP2 – Output is a header that allows user to probe the LM75AIM’s VDD, GND, A0, A1, A2, OS#, and I
2
C
pins.
JP4 – VDD is the power input terminal for the LM75AIM. The jumper terminal provides power to LM75AIM
VDD pin.
JP5 – A0 is bit 0 of the three least significant bits of the I2C slave address. At default, this jumper is pulling
high, and jumping the two terminals allows setting A0 low.
JP6 – A1 is bit 1 of the three least significant bits of the I2C slave address. At default, this jumper is pulling
high, and jumping the two terminals allows setting A1 low.
JP7 – A2 is bit 2 of the three least significant bits of the I2C slave address. At default, this jumper is pulling
high, and jumping the two terminals allows setting A2 low.
1001A2A1A0
MSBLSB
Figure 1: 7-bit Slave Address
JP5JP6JP7
A0A1A2
Figure 2: Three Significant Bits
A2A1A0
000
001
010
011
100
101
110
111
Table 1: I2C Address User Setting Input
Setup
3 LM75AEB User’s Guide SNIU007A July 2012
2.2. Setup
To ensure that you are using the latest version of SensorEval software, you can download from our website
at http://www.ti.com/tool/sensoreval. You must install the SensorEval software, before you connect
theLM75AEB to your PC.
To install the SensorEval Software:
•Click this link http://www.ti.com/tool/sensoreval then click on the red “download” button and click the
“Save” button to save the file to the known directory.
•To open the ZIP file you just download click on the “Open” button
Setup
4 LM75AEB User’s Guide July 2012
•Uncompress the file that you downloaded into a known directory, and run the
SensorEval_1.2.0_Setup.exe file
•When you see the Welcome screen as shown below, follow the instructions by clicking the “Next”
button on the screen to install the software
•When you finish the installation, please click “Finish” button
Setup
5 LM75AEB User’s Guide SNIU007A July 2012
•Before you launch the SensorEval software, connect LM75AEB device to one free USB port of your
PC. The “New Hardware” screen appears and click the “Next” button.
•A warning sign appears. Click “Continue Anyway” button
Setup
6 LM75AEB User’s Guide July 2012
2.3. Operation
For proper operation of the LM75AEB, JP4 should be jumpered. This will allow the LM75A’s VDD to be
sourced from an on-board 3.3V regulator. Jumping JP5 and JP6 will allow configuring the I2C slave address
to 4Ch.
For this quick start, connect the following jumpers:
1. JP4 to short
2. JP5 to short
3. JP6 to short
Figure 3: LM75AEB Board Block Diagram
USB
Input
EEPROM
Circuit
Voltage
Regulato
r
Circuit
Microcontrolle
r
Circuitry
USB D
+
USB D
-
+
5.
0 VDC
GND
+
3.
3 VDC
VDD
GND
GND
SCL
SDA
OS#
U6A1
LM
75AEB
JP6
A
1
JP5
A
0 JP7
A
2
GND
A
0
A
1
A
2
SDA
SCL
Setup
7 LM75AEB User’s Guide SNIU007A July 2012
•To run the SensorEval software, click the icon on the desktop. The dialog box appears to select the
definition file of LM75.
•A confirm screen appears. Click “OK” button.
Setup
8 LM75AEB User’s Guide July 2012
•The SensorEval software will populated based on the LM75’s definition file.
•Select the I2C Addr as “4c”
•Select the Read Cont as “All Regs”. This will read the values continuously.
•Changing the value of LM75A’s registers by clicking the white textbox on the Register Bits column
Board Layout
9 LM75AEB User’s Guide SNIU007A July 2012
3. Board Layout
Figure 4, Figure 5, and Figure 6 show the board layout for the LM75AEB. The EVM offers resistors,
capacitors, eeprom, microcontroller and jumpers to set three least significant bits of I2C slave address to run
the LM75AIM temperature sensor.
The LM75AEB have two additional package footprints MSOP-8 and LLP-8.
Figure 4: Top Assembly Layer
Board Layout
10 LM75AEB User’s Guide July 2012
Figure 5: Top Layer Routing
Figure 6: Bottom Layer Routing
Altri manuali Texas Instruments Scheda madre
Texas Instruments
Texas Instruments ADS1202EVM Manuale utente
Texas Instruments
Texas Instruments TPA032D02 Manuale utente
Texas Instruments
Texas Instruments AN-2255 Manuale utente
Texas Instruments
Texas Instruments TPS552882EVM-2MHz Manuale utente
Texas Instruments
Texas Instruments Jacinto 7 Manuale utente
Texas Instruments
Texas Instruments ONET1131EC Manuale utente
Texas Instruments
Texas Instruments BoosterPack BOOST-ADS7042 Manuale utente
Texas Instruments
Texas Instruments TSC2117EVM-K Manuale utente
Texas Instruments
Texas Instruments LMX2582EVM Manuale utente
Texas Instruments
Texas Instruments DRV821 EVM Series Manuale utente
Texas Instruments
Texas Instruments TPS65218EVM Manuale utente
Texas Instruments
Texas Instruments TMS320C6670 Manuale utente
Texas Instruments
Texas Instruments DLP LightCrafter Dual DLPC900 Manuale
Texas Instruments
Texas Instruments bq20z70EVM-001 Manuale utente
Texas Instruments
Texas Instruments SD034EVK Manuale utente
Texas Instruments
Texas Instruments TMAG5123EVM Manuale utente
Texas Instruments
Texas Instruments LAUNCHXL-F28069M Manuale utente
Texas Instruments
Texas Instruments DRV3946-Q1EVM Manuale utente
Texas Instruments
Texas Instruments TPS7H4010EVM Manuale utente
Texas Instruments
Texas Instruments bq24261M Manuale utente
Manuali Scheda madre popolari di altre marche
Telit Wireless Solutions
Telit Wireless Solutions SL869-3DR Manuale utente
Gigabyte
Gigabyte GA-9IVDT Manuale utente
Commell
Commell MS-C73 Manuale utente
IBT Technologies
IBT Technologies MB860 Manuale utente
Nvidia
Nvidia TEGRA DG-04927-001_V01 Manuale utente
Biostar
Biostar M7VIT Bravo Istruzioni per l'uso e l'installazione
