National Semiconductor LM32 User manual

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©Copyright 2004 National Semiconductor Corporation 1 www.national.com
Revision B
November 9, 2004
LM32, LM40, LM41 Evaluation Board User’s Guide
LM32
,
LM40
,
LM41 Evaluation Board User’s Guide
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©Copyright 2004 National Semiconductor Corporation 2 www.national.com
LM32, LM40, LM41 Evaluation Board User’s Guide
Table of Contents
Table of Contents 2
References 3
1.0Introduction 4
1.1BlockDiagram 4
2.0QuickStart 5
2.1QuickStartDiagram 5
2.2 LM32 Quick Start 6
2.3 LM40 Quick Start 8
2.4 LM41 Quick Start 10
3.0 Functional Description 12
3.1 Evaluation Board Connection Tables 12
3.1.1 LM32 Evaluation Board Connection Table 12
3.1.2 LM40 Evaluation Board Connections Table 13
3.1.3 LM41 Evaluation Board Connections Table 14
4.0 Software Installation and Operation 15
5.0 Electrical and Mechanical Specifications 16
5.1 Electrical Specifications 16
5.2 Electrical Schematic 16,17
5.3 Evaluation Board Layout 18
5.4 Bill of Materials 19
5.5 Mechanical Specifications 20
5.5.1 Operating Mechanical and Environmental Specifications 20
5.5.2 Evaluation Board Mechanical Dimensions 20
5.5.3 Electrostatic Discharge (ESD) Precautions 20
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©Copyright 2004 National Semiconductor Corporation 3 www.national.com
LM32, LM40, LM41 Evaluation Board User’s Guide
References
1. Datasheet for the device on the evaluation board:
a. “LM32 Dual Thermal Diode Temperature Sensor With SensorPath™Bus” or
b. “LM40 Hardware Monitor with Dual Thermal Diodes and SensorPath™Bus” or
c. “LM41 Hardware Monitor with Thermal Diode Inputs and SensorPath™Bus”
The latest copy of the LM32, LM40, LM41 datasheets can be obtained by going to the National
Semiconductor website www.national.com, by searching on “LM32”, “LM40”, or “LM41”, and then
downloading the appropriate datasheet file.
2. SensorEval, Version 1.04b or later, Evaluation Board CD containing:
a. The SensorEval.exe executable program used to run the LM32, LM40, or LM41
Evaluation Boards.
b. A softcopy of this User’s Guide
c. A readme.txt file with useful information about the program.
d. A softcopy of the SensorEval Software manual.
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©Copyright 2004 National Semiconductor Corporation 4 www.national.com
1.0 Introduction
The LM32/LM40/LM41 Evaluation Board is
used together with the National Semiconductor
SensorEval software (provided in the kit), and
with a USB cable (not provided in the kit), and
with an external personal computer (PC).
Power to the LM32/LM40/LM41 Evaluation
Board is provide by the +5VDC line of the USB
connection. No external power supply or signal
sources are required for operation of the
LM32/LM40/LM41 evaluation board.
Before connecting the PC to the
LM32/LM40/LM41 evaluation board through the
USB cable, the PC is first turned on and allowed
to go through its boot-up procedure. The user
installs and initiates the SensorEval software.
See Section 4.0 for software installation details.
After the SensorEval software is running, the
user can connect the USB cable first to the
computer and then to the LM32/LM40/LM41
Evaluation Board.
The PC should be able to recognize the board
and the user simply runs the SensorEval
software and selects the LM32/LM40/LM41 Eval
Board radio button. The software allows the
user to select which of the LM32, LM40, or
LM41 devices is used.
The block diagram below describes the
LM32/LM40/LM41 Evaluation Board itself. The
USB input provides the +5.0 VDC power to the
board, which is regulated down to 3.3 VDC to
power the IC’s. The EEPROM is programmed
at the factory with a unique ID code for this
particular board. When the USB cable is
plugged in, the PC interrogates the USB
devices and can identify this device as the
LM32/LM40/LM41 Evaluation Board.
The microcontroller on the board provides the
single wire signal (SWD), provides the address
(ADD) select signal, and relays the information
from the LM32, LM40, or LM41 to the PC via
the USB lines.
The pins available to the user for probing vary
according to device type. The output pinouts for
each of the LM32, LM40, or LM41 are shown in
the Connections sections and the Electrical
Schematic.
1.1Block Diagram
USB
Input EEPROM
Circuit
Voltage
Regulator
Circuit
Microcontroller
Circuitry
USB D+
USB D-
SCL
SDA
U5
LM32, LM40,
or LM41
+5.0 VDC
GND
+3.3 VDC
+3.3V
SWD
ADD
GND
SWD
ADD
D1+
D1-
D2+
D2- Other Signals
depending on device.
(See Connections and
Schematic)
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©Copyright 2004 National Semiconductor Corporation 5 www.national.com
2.0 Quick Start
1. Install the CD into the CD drive of the computer and install the SensorEval software (see Section
4.0).
2. Hookup the USB cable between the PC or notebook computer and the LM32/LM40/LM41 Evaluation
Board as shown in Quick Start Diagram below.
2.1 Quick Start Diagram
Important! NO EXTERNAL POWER SUPPLY OR SIGNAL INPUTS ARE REQUIRED!
For
Socket
(not used)
LM32/40/41 Evaluation Board
National Semiconductor
Q1
LM41 LM40 LM32
LM32 LM40 LM41
U4
J3
J2
J6
Q2
See
Connection
Diagrams
See
Connection
Diagrams
LM32/40/41
PC with
SensorEval
software
installed
USB Cable
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©Copyright 2004 National Semiconductor Corporation 6 www.national.com
2.2 LM32 Quick Start
1. Run the SensorEval software by clicking the
icon on the desktop.
2. The first screen will look like this:
Select the LM32 Evaluation Board.
Click OK.
3. The next screen will look like this:
Select “Read Cont” box to read the temperature
continuously. Notice that there are three tabs for
the registers “00 through 05”, “08 through 09”,
and “09 through 20”. The first screen (above)
displays the registers 00hex through 05hex.
For Register 05, “Device Func1 Enable”,
select ENABLED.
4. Click on the 09-20 Register Tab.
The Screen should look like this:
For Register 0A select Enable for Temp Sensor
0, 1 and 2.Note that Temp2 (Remote sensor
[Q1 on the board] 2 is displayed in the box on
the right and is updated as the temperature of
the Q1 changes.
5. Click on the 08-09 Register Tab.
The screen should look like this:
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©Copyright 2004 National Semiconductor Corporation 7 www.national.com
Notice the Local (on chip) sensor (Temp 0)
and Remote 1 (Q2) sensor readings.
6. If the user clicks on the Start Plot button a
graph box will appear and will graph the
temperature. An example is shown below.
7. If the user clicks on the Start Log button a
screen will appear that looks like this:
The user may then select whatever directory
and file name of their choice and click on
“Open”. Data will be stored in the file for each
date/time and temperature.
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©Copyright 2004 National Semiconductor Corporation 8 www.national.com
2.3 LM40 Quick Start
1. Run the SensorEval software by clicking the
icon on the desktop.
2. The first screen will look like this:
Select the LM40 Evaluation Board.
Click OK.
3. The next screen will look like this:
Select “Read Cont” box to read the temperature
continuously.
Notice that there are four tabs for the registers
“00 through 04”, “05 through 09”, and “09
through 10”, “11”, and “12-20”. The first screen
(above) displays the registers 00hex through
04hex.
4. Click on the 05-09 Register Tab.
The Screen should look like this:
For Register 05 select Enable for “Device
Func2 Enable” and “Device Func1 Enable”.
5. Click on the 09-10 Register Tab.
The screen should look like this:
Select Enabled for Register 0A Temp Sensor
(0,1,2) Enable. The temperature readings for
Temp0 (Local) Temp 1 (Q2) and Temp2 (Q1)
will be displayed in Register 09 screens.
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©Copyright 2004 National Semiconductor Corporation 9 www.national.com
6. For Voltage Monitoring input functions
select the “12-20” Register Tab. The
screen should look like this:
In Register 12, Enable Voltage Sensor (0-
4).
7. Click on the Register 11 tab. The
screen should look like this:
The voltages that are present at the voltage
inputs of the LM40 will be displayed in
Register 11.
8. If the user clicks on the Start Plot button
a graph box will appear and will graph
the temperature. A temperature
example is shown below.
A Voltage Input Monitoring plot is shown below.
9. If the user clicks on the Start Log button
a screen will appear that looks like this:
The user may then select whatever directory
and file name of their choice and click on
“Open”. Data will be stored in the file for each
date/time and temperature.
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©Copyright 2004 National Semiconductor Corporation 10 www.national.com
2.4 LM41 Quick Start
1. Run the SensorEval software by clicking the
icon on the desktop.
2. The first screen will look like this:
Select the LM41 Evaluation Board.
Click OK.
3. The next screen will look like this:
Select “Read Cont” box to read the temperature
continuously.
Notice that there are four tabs for the registers
“00 through 04”, “05 through 09”, and “09
through 10”, “11-12”, and “20”. The first screen
(above) displays the registers 00hex through
04hex.
4. Click on the 05-09 Register Tab.
The Screen should look like this:
For Register 05 select Enable for “Device
Func2 Enable” and “Device Func1 Enable”.
5. Click on the 09-11 Register Tab.
The screen should look like this:
Select Enable for Register 0A Temp Sensor
(0,1) Enable. The temperature readings for
Temp0 (Local) and Temp1 (Q2) will be
displayed in Register 09 screens.
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©Copyright 2004 National Semiconductor Corporation 11 www.national.com
6. For Voltage Monitoring input functions
select the “11-12” Register Tab. The screen
should look like this:
In Register 12, Enable Voltage Sensor (0-4)
Enable and Voltage Attention Enable.
7. Click on the Register 11 tab. The screen
should look like this:
The voltages that are present at the voltage
inputs of the LM41 will be displayed in Register
11.
8. If the user clicks on the Start Plot button a
graph box will appear and will graph the
temperature. A temperature example is
shown below.
A Voltage Input Monitoring plot is shown below.
9. If the user clicks on the Start Log button a
screen will appear that looks like this:
The user may then select whatever directory
and file name of their choice and click on
“Open”. Data will be stored in the file for each
date/time and temperature.
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©Copyright 2004 National Semiconductor Corporation 12 www.national.com
3.0 Functional Description
The LM32/LM40/LM41 Evaluation Board, along
with the SensorEval Software, provides the
system designer with a convenient way to learn
about the operation of the LM32, LM40, or
LM41 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 temperatures. It’s that simple! The user
doesn’t have to provide any power or external
signals to the evaluation board.
Power to the LM32/LM40/LM41 Evaluation
Board is taken from the USB 5-Volt line. This
+5VDC 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 LM32, LM40, LM41, the on-board
microcontroller, and the EEPROM chip where
the board ID information is stored.
The microcontroller on the board provides the
single wire signal (SWD), provides the Address
(ADD) select signal, and relays the information
from the LM32, LM40, or LM41 to the PC via
the USB lines.
3.1 Evaluation Board Connection Tables
3.1.1 LM32 Evaluation Board Connections Only
Connector Label Pin
Number Description
J1 N/A
USB Cable Input. Connect the USB cable to this jack
after the SensorEval software has been loaded on the
PC.
1,2 NC
3,4 GND
5,6 3.3_SBY This is the +3.3V voltage supplied by the on-
board voltage regulator.
7,8 SWD This is the Single wire interface signal created
by the on-board microcontroller.
9,10 ADD This is the address select signal created by the
on-board microcontroller.
11,12 NC
J2
Output header
provides user with
signals for test
purposes only.
Do not apply any
external power or
signals to any of the
pins on these
headers! 13,14 NC
1,2 NC
3,4 NC
5,6 NC
7,8 D2+ This is the anode of the second remote diode
input.
9,10 D2- This is the cathode of the second remote diode
input.
11,12 D1+ This is the anode of the first remote diode input.
J3
Output header
provides user with
signals for test
purposes only.
Do not apply any
external power or
signals to any of the
pins on these
headers! 13,14 D1- This is the cathode of the first remote diode input.
J4, J5 These Headers are not used for evaluation board
purposes. They are not stuffed or used.
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©Copyright 2004 National Semiconductor Corporation 13 www.national.com
3.1.2 LM40 Evaluation Board Connections Only
Connector
Label Pin Number Description
J1 N/A
USB Cable Input. Connect the USB cable to this jack
after the SensorEval software has been loaded on the
PC.
1,2 NC On the evaluation board this is jumpered to ground.
3,4 GND On the evaluation board this is jumpered to ground.
5,6 3.3_SBY This is the +3.3V voltage supplied by the on-
board voltage regulator.
7,8 SWD This is the Single wire interface signal created by
the on-board microcontroller.
9,10 ADD This is the address select signal created by the on-
board microcontroller.
11,12 VCCP_IN This is the +1.2V voltage monitoring input to the LM40. On the evaluation board this input is jumpered
to a +1.1V (typical) source.
J2
Output header
provides user with
signals for test
purposes only.
Do not apply any
external power or
signals to any of
the pins on these
headers! 13,14 +2.5VIN This is the +2.5V voltage monitoring input to the
LM40. On the evaluation board this input is jumpered to a
+1.1V (typical) source.
1,2 NC On the evaluation board this is jumpered to ground.
3,4 +12VIN This is the +12V voltage monitoring input to the
LM40. On the evaluation board this is jumpered to +3.3V
for test purposes.
5,6 +5VIN This is the +5V voltage monitoring input to the LM40. On the evaluation board this is jumpered to +3.3V
for test purposes.
7,8 D2+ This is the anode of the second remote diode input to
the LM40. A jumper connects to the base-collector
(anode) of Q1, a MMBT3904 transistor.
9,10 D2- This is the cathode of the second remote diode input
to the LM40. A jumper connects to the emitter (cathode)
of Q1, a MMBT3904 transistor.
11,12 D1+ This is the anode of the second remote diode input to
the LM40. A jumper connects to the base-collector
(anode) of Q2, a MMBT3904 transistor.
J3
Output header
provides user with
signals for test
purposes only.
Do not apply any
external power or
signals to any of
the pins on these
headers!
13,14 D1- This is the cathode of the second remote diode input to the LM40. A jumper connects to the emitter (cathode)
of Q1, a MMBT3904 transistor.
J4, J5 These Headers are not used for evaluation board
purposes. They are not stuffed or used.
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©Copyright 2004 National Semiconductor Corporation 14 www.national.com
3.1.3 LM41 Evaluation Board Connections Only
Connector
Label Pin Number Description
J1 N/A
USB Cable Input. Connect the USB cable to this jack
after the SensorEval software has been loaded on the
PC.
1,2 NC On the evaluation board this is jumpered to ground.
3,4 GND On the evaluation board this is jumpered to ground.
5,6 3.3_SBY This is the +3.3V voltage supplied by the on-
board voltage regulator.
7,8 SWD This is the Single wire interface signal created by
the on-board microcontroller.
9,10 ADD This is the address select signal created by the on-
board microcontroller.
11,12 VCCP_IN This is the +1.2V voltage monitoring input to the LM41. On the evaluation board this input is jumpered
to a +1.1V (typical) source.
J2
Output header
provides user with
signals for test
purposes only.
Do not apply any
external power or
signals to any of
the pins on these
headers! 13,14 +2.5VIN This is the +2.5V voltage monitoring input to the
LM41. On the evaluation board this input is jumpered to a
+1.1V (typical) source.
1,2 NC On the evaluation board this is jumpered to ground.
3,4 NC On the evaluation board this is jumpered to +3.3V.
5,6 +12VIN This is the +12V voltage monitoring input to the
LM41. On the evaluation board this is jumpered to +3.3V
for test purposes.
7,8 +5VIN This is the +5V voltage monitoring input to the
LM41. On the evaluation board this input is jumpered to
+3.3V. Note: J6 must also have a jumper installed
9,10 NC
11,12 D1+ This is the anode of the second remote diode input to the LM41. A jumper connects to the base-collector
(anode) of Q2, a MMBT3904 transistor.
J3
Output header
provides user with
signals for test
purposes only.
Do not apply any
external power or
signals to any of
the pins on these
headers!
13,14 D1- This is the cathode of the second remote diode input
to the LM41. A jumper connects to the emitter (cathode)
of Q1, a MMBT3904 transistor.
J4, J5 These Headers are not used for evaluation board
purposes. They are not stuffed or used.
J6 1,2
Jumper these pins so that the +3.3V can be connected to
the +5VIN input to the LM41.
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©Copyright 2004 National Semiconductor Corporation 15 www.national.com
4.0 Software Installation and
Operation
4.1 Installation
The CD provided in the LM32/LM40/LM41 Evaluation
Board Kit contains the SensorEval software used to
make the LM32, LM40, LM41 Evaluation Board operate
with the user’s PC. It is assumed that the user will be
using a PC with a Pentium®III or higher processor and
Microsoft Windows®XP/2000/98/ME operating system.
The software is installed as follows:
1. Insert the LM32/LM40/LM41 Evaluation Board
CD into the CD drive of the PC. See details in
the readme.txt file.
2. The software manual, provided on the CD, may
be useful to the user during this process.
3. Follow all of the Installation instructions in the
windows as the SensorEval software is
installing.
4. The installation process will put an icon on the
PC desktop so that the SensorEval program will
run when the icon is double-clicked.
4.2 Operation
Follow the following procedure for operation the
LM32/LM40/LM41 Evaluation Board using the
SensorEval software:
1. Run the SensorEval program by either double-
clicking on the icon on the desktop or by
selecting Start, Run, and browse to find the
SensorEval.exe file.
2. Plug in the USB cable on both the PC and the
LM32/LM40/LM41 Evaluation Board.
Follow the register setup steps given in 2.0 Quick Start
section of this User’s Guide. Make sure that you are
following the given procedure for the specific evaluation
board you are working with.
Temperature and voltage monitoring can easily be done
using external thermal diodes and/or external voltages
applied to the pins that are jumpered on J2 and J3.
Refer to the schematic, layout and electrical connection
tables to be sure about the connections the user will
make.
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©Copyright 2004 National Semiconductor Corporation 16 www.national.com
5.0 Electrical and Mechanical Specifications
5.1 Electrical Specifications
Power Requirements
The Board uses the +5.0 VDC and GND lines from the USB
connection. This +5.0 VDC voltage is regulated down to +3.3
VDC for board power.
* NO EXTERNAL POWER SUPPLY INPUTS ARE REQUIRED
*
+5.0 ±0.1 V,
100 mA max.
5.2 Electrical Schematic
Page 1 of 2 Pages of the Schematic of the LM32/LM40/LM41 Evaluation Board
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©Copyright 2004 National Semiconductor Corporation 17 www.national.com
5.2 Electrical Schematic (continued)
Page 2 of 2 Pages of the Schematic of the LM32/LM40/LM41 Evaluation Board
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©Copyright 2004 National Semiconductor Corporation 18 www.national.com
5.3 Evaluation Board Layout
Figure 5.3 Layout diagram of the LM32/LM40/LM41 Evaluation Board
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©Copyright 2004 National Semiconductor Corporation 19 www.national.com
5.4 Bill of Materials for LM32/LM40/LM41 Evaluation Board
Item Quantity Reference Part
1 12 C1, C2, C3, C4, C5, C6, C10, C12,
C13, C14, C15, C16 Capacitor, ceramic, SMT, 0.1 uF
2 2 C7, C8 Capacitor, ceramic, SMT, 33 pF
3 1 C9 Capacitor, electrolytic, SMT, 2.2 uF
4 1 C11 Capacitor, electrolytic, SMT, 10 uF
5 3 C17, C18, C19, C21 Capacitor, ceramic, SMT, 100 pF
2 C20, C22 Capacitor, ceramic, SMT, 100 pF [Do Not Stuff for LM41]
1 J1 Connector, USB-B
2 J2, J3 Header, 7X2, 0.1 in centers
2 J4, J5 Header, 7X2, 0.1 in centers [Do Not Stuff]
1 J6 Header, 1X2, 0.1 in centers
1 J7 Header, 1X2, 0.1 in centers [Do Not Stuff]
15 Shunt Shunt, 1x2 installed on the pins of J2 and J3, and [for LM41
Evaluation Board only] on J6
1 L1 Filter, 1 uH, Stewart MI1206K900R-00
1 Q2 Transistor, NPN, MMBT3904, SMT
3 Q1, Q3, Q4 Transistor, NPN, MMBT3904, SMT [Do Not Stuff]
1 R1 Resistor, SMT, 100 k, 0805
2 R2, R6 Resistor, SMT, 1M, 0805
2 R3, R4 Resistor, SMT, 22 Ohm, 0805
4 R5, R7, R8, R9 Resistor, SMT, 1.5 k, 0805
1 R10, R12 Resistor, SMT, 0 Ohm, 0805
1 R17 Resistor, SMT, 0 Ohm, 0805 [Do Not Stuff]
2 R11, R14 Resistor, SMT, 10k, 0805
2 R15, R20 Resistor, SMT, 5k, 0805
2 R16, R19 Resistor, SMT, 10k, 0805 [Do Not Stuff]
1 U1 IC, Voltage Regulator, National LP2950CDT-3.3
1 U2 IC, Microcontroller, Cypress CY7C64613-52NC
1 U3 IC, EEPROM, Atmel AT24C02-10SI-2.7
1 U4 LM32, LM40, or LM41CIMF Device Under Test (DUT)
1 U4(for socket) LM32, LM40, or LM41CIMF [Do Not Stuff] used with socket
1 U4s Socket, Loranger, 14-pin TSSOP-14 [Do Not Stuff]
1 Y1 Crystal, 12 MHz, Pletronics 2S1200G140
1 -- Circuit Board, Fabricated, LM32, LM40, LM41 Evaluation
Board, Rev. 1
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