User’s Guide
October 2012
LMP91051EVM User’s Guide
CONTENTS
1.
1
INTRODUCTION ................................................................................................... 1
2
SETUP .................................................................................................................. 2
3
OPERATION ......................................................................................................... 5
4
INSTALLING THE SENSOR AFE SOFTWARE ................................................... 10
5
BOARD LAYOUT ................................................................................................ 11
6
SCHEMATIC ....................................................................................................... 12
7
BOM .................................................................................................................... 13
1
2
3
4
5
6
7
8
9
8
LIST OF FIGURES
Connection Diagram ............................................................................................... 2
Jumper Setting (Default) for voltage reading ........................................................... 3
LMP91051EVM to SPIO-4 Board Connection ......................................................... 4
Sensor AFE Items of Interest .................................................................................. 5
Recommended LMP91051 Configuration for a voltage Reading ............................. 7
Sensor Database Window ..................................................................................... 8
Reults of DC Reading ............................................................................................. 9
LMP91051EVM’s J3 for SPI Signals ..................................................................... 10
LMP91051EVM Layout......................................................................................... 11
LMP91051EVM Schematic ................................................................................... 12
1
2
LIST OF TABLES
Jumpers for Voltage Measurement ......................................................................... 3
LMP91051EVM Bill of Materials............................................................................ 13
Introduction
The LMP91051 Design Kit (consisting of the LMP91051 Evaluation Module, the SPIO-4 Digital Controller
Board, the Sensor AFE software, and this user’s guide) is designed to ease evaluation and design-in of Texas
Instrument’s LMP91051 Configurable AFE for Nondispersive Infrared (NDIR).
Data capturing and evaluations are simplified by connecting the SPIO-4 Digital Controller Board (SPIO-4 board)
to a PC via USB and running the Sensor AFE software. The data capture board will generate the SPI signals
to communicate to and capture data from the LMP91051. The user will also have the option to evaluate the
LMP91051 without using the SPIO-4 board or the Sensor AFE software.
The on board data converter will digitize the LMP91051’s analog output, and the software will display these
results in time domain and histogram. The software also allows customers to write to and read from registers,
to configure the device’s gain, output offset, and common mode voltage, and most importantly, to configure and
learn about the LMP91051.
October 2012
LMP91051EVM User’s Guide
This document describes the connection between the boards and PC, and provides a quick start for voltage
measurements. This document also describes how to evaluate the LMP91051 with and without the SPIO-4
board and provides the schematic, board layout, and BOM.
2.
Setup
This section describes the jumpers and connectors on the EVM as well and how to properly connect, set up
and use the LMP91051EVM.
2.1. Connection Diagram
Figure 1 shows the connection between the LMP91051 Evaluation Module (LMP91051EVM), SPIO-4 board,
and a personal computer with the Sensor AFE software. LMP91051 can be powered using external power
supplies or from the SPIO-4 board.
Figure 1: Connection Diagram
2.2. Jumper Connections
1. The jumpers for this example application can be seen in Figure 2 and Table 1.
2. The SPIO-4 board is properly setup out of the box (no assembly required).
3. The schematic for the LMP91051EVM can be seen in Figure 10.
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Figure 2: Jumper Setting (Default) for voltage reading
Table 1: Jumpers for Voltage Measurement
3
Jumpers
JP1: VDD_DUT
JP2: VREF_ADC
JP3: VA_ADC
JP4: OUT_DUT to
ADC
JP5: VDD to VIO
JP6: VIO
J1: IN1 to CMOUT
Pin
P1-P2
P1-P2
P1-P2
P1-P2
Purpose
Connect LMP91051 VDD to +3.3V from SPIO4
Connect ADC VREF to 4.1V from U5 (LM4140)
Connect ADC VA to +5V from SPIO4
Connect LMP91051 OUT to ADC input RC filter
Open
P2-P3
Open
J2: IN2 to CMOUT
Open
Connect LMP91051 VDD to VIO
Connect LMP91051 VIO to +3.3V from SPIO4
Connect LMP91051 IN1 to CMOUT. Note: Board is
provided with this jumper open. Use provided jumper to
short IN to CMOUT for easy evaluation.
Connect LMP91051 IN2 to CMOUT. Note: Board is
provided with this jumper open. Use provided jumper to
short IN to CMOUT for easy evaluation.
LMP91051EVM User’s Guide
October 2012
2.3. Installing/Opening the Software
Follow Section 4 to install and open the Sensor AFE software.
2.4. Connecting and Powering the Boards
These Steps have to be done in this order.
1. Connect the LMP91051EVM’s J3 to SPIO-4 Board’s J6. See Figure 3.
.
J3
Figure 3: LMP91051EVM to SPIO-4 Board Connection
2. Connect SPIO-4 board to a PC via USB.
3. Use a multimeter to measure LMP91051EVM’s +5V test point; it should be approximately 5V.
If it is not, check your power supplies and jumpers. Measure test point VREF_ADC; it should
be approximately 4.1V. If it’s not, check your jumpers and U5.
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3.
Operation
3.1. Sensor AFE Software Overview
Once connection between the boards and PC is established, you can use the software to communicate to and
capture data from the LMP91051. Drag cursor over window icons to get an icon description. Some items of
interest are shown in Figure 4.
1
2
3
4
5
Figure 4: Sensor AFE Items of Interest
.
1. Menu Bar Icons (from left to right)
a. Save Configuration to File: Saves the current configuration settings (register settings)
to an .xml file.
b. Load Configuration File: Loads the selected configuration settings (register settings)
.xml file.
c. Register Map: Opens Register Map window. An alternative to the Virtual Device, for
writing and reading the device registers. See datasheet for details on device Register
Map.
d. Save All Registers to File: Saves register contents to a .cvs file.
e. Read All Register from Board: After configuring the register map, use this button to
read all registers. Functional only in SDIO Mode (see Item 3).
f. Write All Registers To Board: After configuring the register map use this button to write
all registers. Registers will not be updated until this step is done.
g. Zoom In/Out Diagram Image: Zoom in and out of the virtual device image.
h. Show Tutorial: Takes you to the interactive Software Overview videos.
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LMP91051EVM User’s Guide
October 2012
i.
2.
3.
4.
5.
Documentation: Accesses the LMP91051 Datasheet, SPIO4 User’s Guide, or
Evaluation Board User’s Guide.
Device Selection and User Inputs
a. LMP91050/1 : Toggle between LMP91050 and LMP91051 device.
b. fc: Center frequency of external bandpass filter.
c. bandwidth: Pass band bandwidth of external bandpass filter.
d. R1_EXT, R2_EXT, C1_EXT, C2_EXT: External bandpass filter component values
calculated based on user input for center frequency (fc) and pass band (bandwidth)
described above.
e. Supply: LMP91051 supply voltage (VDD).
f. IC Temp: LMP91051 operating temperature
g. Offset Adjust Voltage: The tool will calculate the DAC code (decimal) required to
achieve this output offset adjust voltage. User must then Write to the register to update
the value in the NDAC register.
h. ADC Vref: ADC reference voltage. User should input value measured at VREF_ADC
test point. Value used to calculate displayed Output Voltage.
i. Vout Dark: This value corresponds to the user measured value at the LMP91051
output (OUT) when input is shorted (IN = CMOUT). Tool will use this value to estimate
LMP91051 input voltage (IN - CMOUT) on subsequent measurements.
Change Mode: Change between device Read Mode OFF (default) and ON. See datasheet for
details on SPI Read Mode.
Eval Board Setting: Document to show user how to configure jumpers and connect thermopile
based on sensor selected.
Virtual Device: Drag cursor across color coded blocks and click to configure each block. To
update registers “Write All Registers” when done.
3.2. Configuring the LMP91051 Using the Sensor AFE Software
Follow the step-by-step instructions under the “HelpBar” mini-tab (left hand side of the GUI) to configure the
LMP91051 for this example. These step-by-step instructions are discussed in details below, and the
recommended configuration should look similar to Figure 5.
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Figure 5: Recommended LMP91051 Configuration for a voltage Reading
1. Step 1: Select a Sensor – Sensor Database window opens. See Figure 6. Step 1: Click sensor type
(Thermopile) and the sensors will show in the bottom table. Step 2: Click sensor and then click
“Select” button on the left to use this sensor.
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LMP91051EVM User’s Guide
October 2012
Step 1
Step 2
Figure 6: Sensor Database Window
2. Step 2: Input Mux – click on the mux block to set “1: IN1” (default).
3. Step 3: PGA1 Enable – click on the “PGA1” block to set “1: PGA1 ON” . Remember after
configuring the register map to use the Write All Registers button to update the registers.
4. Step 4: PGA2 Enable – click on the “PGA2” block to set “1: PGA2 ON” . Note: By default PGA1
and PGA2 are OFF on power up. However the software was designed to automatically power ON
PGA1 and PGA2 for ease of use.
5. Step 5: External Filter – click on the switch block to choose “0: PGA1 to PGA2 direct” (default).
6. Step 6: Common Mode – click on the “CM GEN” block to set “0: 1.15V” (default).
7. Step 7: GAIN 2 – click on the “PGA2” block to set “00: 4” (default).
8. Step 8: GAIN 1 – click on the “PGA1” block to set “0: 250” (default).
9. Step 8: DAC (Output Offset) – click on the “DAC” block to set “128” (default) for 0 mV offset.
Alternatively, user can also use the Offset Adjust Voltage user input field to input 0 mV.
10. Step 10: Performance - click on the “Performance” mini-tab. This tab displays the Estimated
Device Performance based on device configuration and user input device Supply and IC Temp
.This tab also displays the Measured System Performance if you’ve connected a board and ran the
LMP91051.
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3.3. Capturing Data
1. Click on the “Measurement” tab.
2. Under the “Output Format” field, select Display as “Output Voltage (V)”
3. Under the “Stop Condition” field, select Run as “1” Seconds. Alternatively, select “Run
Continuously” radio button to run continuously up to 1 hour.
4. Click on the “Run” button to view the output voltage results. A reading should be plotted as seen
in Figure . Output voltage will vary depending on input voltage across input (IN1/IN2) and CMOUT.
If J1/J2 are shorted, IN1/IN2 = CMOUT, output voltage should be about 1V. Note: Board is
provided with jumper J1/J2 open. Use provided jumper to short IN1/IN2 to CMOUT for easy
evaluation.
Figure 7: Results of DC Reading
3.4. Powering the LMP91051EVM
There are two ways in which VDD can be sourced: external supply or SPIO-4 power.
If using an external power supply to source VDD, do the following:
1. Connect an external power supply to banana jacks VDD-EXT and GND.
2. Jumper pins 2 and 3 of JP1 to connect the external power to VDD_DUT.
If using the SPIO-4 power to source VDD, then do the following:
1. Jumper pins 1 and 2 of JP1 to connect +3.3V SPIO-4 power to VDD_DUT.
The schematic for the LMP91051EVM can be seen in Figure 10.
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LMP91051EVM User’s Guide
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3.5. Evaluating the LMP91051 without the SPIO-4 Board
The SPIO-4 digital controller board is used to generate the SPI signals to communicate to the LMP91051.
Without the SPIO-4 board, the Sensor AFE software for the LMP91051 cannot be used to capture and
analyze data from the LMP91051EVM.
If the SPIO-4 board is not available but LMP91051 evaluation is desirable, then connect your own SPI
signals to J1 of the LMP91051EVM as seen below. Reference the LMP91051 datasheet for appropriate
SPI timing diagrams. Source LMP91051 VDD with an external power supply per previous section.
Figure 8: LMP91051EVM’s J3 for SPI Signals
Refer to the LMP91051 datasheet for more information on the LMP91051’s SPI protocol.
4.
Installing the Sensor AFE Software
Each Sensor AFE product will have its own software. To access the Sensor AFE software for LMP91051,
follow the steps below.
1. Getting the Zip Files
a. You can find the latest downloadable Sensor AFE software at
ti.com/sensorafe
b. Download the zip file onto your local hard drive. Unzip this folder.
2. Installing the Driver - skip this step if you don’t have the LMP91051EVM and SPIO4 digital controller
board.
a. See the provided Installation Guide For SensorAFE Drivers.pdf.
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3. Installing the Software
a. See the provided Installation Guide for LMP91050 SensorAFE Software.pdf
i. Note: If you run the software without the boards, you’ll get an error message. Ignore that
error message and click “Ok” to continue.
5.
Board Layout
Figure 9: LMP91051EVM Layout
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LMP91051EVM User’s Guide
October 2012
6.
Schematic
Figure 10: LMP91051EVM Schematic
7.
BOM
LMP91051EVM Bill of Materials
Item
1
Designator
+3P3V, +5V, A0_DUT, A1_DUT, CMOUT_DUT, CSB_ADC,
CSB_DUT, DOUT_ADC, IN1_DUT, IN2_DUT, MISO, MOSI,
MOSI_EN, OUT_DUT, REF_ADC, SCLK_ADC, SCLK_DUT,
SDIO_DUT, TEMP, VA_ADC, VDD_DUT, VDD_EXT, VIO,
VIO_ADC, VIO_EXT, VREF_ADC
Description
Test Point, TH, Compact, Red
Manufacturer
Keystone Electronics
PartNumber
5005
Quantity
26
2
3
4
AA1
BNC1, BNC2, OUT
C1
TBD by TI
Amphenol Connex
TDK
551xxxxxx-001 REV A
112404
C3216X5R0J106M
1
3
1
5
C2
TDK
C2012X7R2E472K
1
6
C3, C9, C10, C12, C17, C22
Vishay-Sprague
293D106X0010A2TE3
6
7
C4, C7, C13, C15, C18, C19, C23
AVX
0603YC104JAT2A
7
8
C5, C6, C21
MuRata
GRM2195C1H103JA01D
3
9
C8, C14
AVX
08053C104KAT2A
2
10
C11
AVX
12061C104JAT2A
1
11
C16, C20
AVX
0805ZC105KAT2A
2
12
FID1, FID2, FID3
N/A
N/A
3
13
GND1, GND2, GND3, GND4, GND5, GND6, GND7, GND8,
GND9, GND10, GND11
Printed Circuit Board
DNS
CAP, CERM, 10uF, 6.3V, +/20%, X5R, 1206
CAP CER 4700PF 250V X7R
10% 0805
CAP, TANT, 10uF, 10V, +/20%, 3.4 ohm, 3216-18 SMD
CAP, CERM, 0.1uF, 16V, +/5%, X7R, 0603
CAP, CERM, 10nF, 50V, +/-5%,
C0G/NP0, 0805
CAP, CERM, 0.1uF, 25V, +/10%, X7R, 0805
CAP, CERM, 0.1uF, 100V, +/5%, X7R, 1206
CAP, CERM, 1uF, 10V, +/-10%,
X7R, 0805
Fiducial mark. There is nothing
to buy or mount.
Test Point, TH, Compact, Black
Keystone Electronics
5006
11
14
15
H1, H2, H3, H4
J1, J2, JP3, JP4, JP5
B&F Fastener Supply
NY PMS 440 0025 PH
4
5
16
J3
TSW-102-07-G-S
PBC36DGAN
1
17
JP1, JP2, JP6
Samtec Inc.
Sullins Connector
Solutions
Samtec Inc.
TSW-103-07-G-S
3
18
L1, L2
Wurth Elektronik eiSos
BLM21BD272SN1L
2
19
R1, R2
Vishay-Dale
CRCW0805160KJNEA
2
20
21
R3
R4
Vishay-Dale
Vishay-Dale
DNS
CRCW0805100KJNEA
1
1
22
R5, R10
Vishay-Dale
CRCW08050000Z0EA
2
Bump Hemisphere
Header, TH, 100mil, 2x1, Gold
plated, 230 mil above insulator
SPIO-GPSI16 Header, 16-Pin,
Dual row, Right Angle
Header, TH, 100mil, 1x3, Gold
plated, 230 mil above insulator
Ferrite, Chip, 200mA, .080 ohm,
SMD
RES, 160k ohm, 5%, 0.125W,
0805
DNS
RES, 100k ohm, 5%, 0.125W,
0805
RES, 0 ohm, 5%, 0.125W, 0805
23
R6
24
R7
25
R8
26
R9
27
28
29
R11, R12, R13, R14
U1
U2
30
31
32
U3
U4
U5
33
34
35
U6
Y1
Y1A
RES, 100k ohm, 1%, 0.125W,
0805
RES, 1.00k ohm, 1%, 0.125W,
0805
RES, 27.4 ohm, 1%, 0.1W,
0603
RES, 51.1 ohm, 1%, 0.1W,
0603
DNS
LMP91051
16-Bit, 50 to 250 kSPS,
Differential Input, MicroPower
ADC, 10-pin Mini SOIC, PbFree
Non-Inverting 3-State Buffer
DNS
Precision Micropower Low
Dropout Voltage Reference, 8pin Narrow SOIC
2K 5.0V I2C Serial EEPROM
Osc 4.000Mhz 5.0V Full Size
Oscllator Socket
Vishay-Dale
CRCW0805100KFKEA
1
Vishay-Dale
CRCW08051K00FKEA
1
Vishay-Dale
CRCW060327R4FKEA
1
Vishay-Dale
CRCW060351R1FKEA
1
Vishay-Dale
Texas Instruments
Texas Instruments
CRCW06031R00JNEA
LMP91051
ADC141S628QIMMX/NOP
B
4
1
1
Texas Instruments
Heimann
Texas Instruments
SN74AHC1G125DCKR
HMS J21
LM4140ACM-4.1
1
1
1
On Semiconductor
ECS Inc
Aires Electronics
CAT24C02WI-GT3
ECS-100AX-100
A462-ND
1
1
1
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Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions:
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This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15
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the user is encouraged to try to correct the interference by one or more of the following measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
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This Class A or B digital apparatus complies with Canadian ICES-003.
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Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and
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Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une
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sont strictement interdits pour l'exploitation de l'émetteur.
SPACER
SPACER
SPACER
【Important Notice for Users of this Product in Japan】
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If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with
respect to this product:
1. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by
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本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注
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1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の
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2. 実験局の免許を取得後ご使用いただく。
3. 技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないも
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上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。
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