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Texas Instruments LDC2114 User Manual Download Page 49

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LDC2114 EVM REV A Schematics and Layout

49

SNOU144 – December 2016

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Copyright © 2016, Texas Instruments Incorporated

LDC2114 Evaluation Module for Inductive Touch Inductance to Digital

Converter

Figure 53. LDC2114 Layout Top Layer - Overview

Figure 54. LDC2114 Layout Top Layer – Signals and Components

Summary of Contents for LDC2114

Page 1: ...LDC2114 Evaluation Module for Inductive Touch Applications User s Guide Literature Number SNOU144 December 2016 ...

Page 2: ...rations 24 4 6 5 Loading Previously Saved Configurations 24 4 7 Configuring the EVM Using the Configuration Page 25 4 7 1 Changing registers through the Configuration Pane 25 4 7 2 Selecting the Mode of Operation and Scan Rate 26 4 7 3 Interrupt polarity 26 4 7 4 Base tracking Increment 26 4 7 5 LC Resonant Frequency Divider Pre scaler 26 4 7 6 Channel Settings 27 4 7 7 Algorithm Settings 27 4 7 8...

Page 3: ...ter Page 23 23 Save Register Values to File on Register Page 24 24 Loading Previously Saved Register Values from File on Register Page 25 25 Global Button Settings Channel Settings on Configuration Page 26 26 Algorithm Settings and Calculator on Configuration Page 27 27 Device Status 28 28 Select the Data Graph on Data Streaming Page 29 29 Select Log File Button on Data Streaming Page 30 30 Start ...

Page 4: ...wer 3 3V LDC for MSP430 46 51 MSP430 47 52 MSP430 GPIO Breakout connector and General purpose LEDs 48 53 LDC2114 Layout Top Layer Overview 49 54 LDC2114 Layout Top Layer Signals and Components 49 55 LDC2114 Layout MidLayer 1 Ground Plane 50 56 LDC2114 Layout MidLayer 2 Signals and Power Plane 50 57 LDC2114 Layout Bottom Layer Signals Plane 51 58 LDC2114 Bottom Layer Overview 51 ...

Page 5: ...5 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated List of Tables List of Tables 1 List of Evaluation modules 6 2 Connection options 7 3 BOM for LDC2114EVM rev A 52 ...

Page 6: ...nductive target objects and to detect the press of an inductive touch button The LDC is controlled by an MSP430 which interfaces to a host computer The LDC2112 is the two channel version of the LDC2114 The LDC2112 does not have a dedicated EVM Instead the four channel LDC2114 EVM should be used to evaluate the technology and performance Figure 1 LDC2114 Evaluation Module PCB perforations allow rem...

Page 7: ...d pair wires to J6 of the LDC2114 EVM NOTE Schematics Layout and Coil characteristics of the LDCCOILEVM are described in the LDCCOILEVM user guide Table 2 shows the connection options for each coil type Table 2 Connection options LDCTOUCHCOMCOILEVM coil type Connect to A J3 ZIF connector using flat ribbon cable B J3 ZIF connector using flat ribbon cable C J3 ZIF connector using flat ribbon cable D...

Page 8: ...tensity 9 MSP430 F5528 This microcontroller is used to configure the LDC2114 facilitate data streaming to the GUI and to show the intensity of the button press 10 Perforation and probing header These pads can be used for probing any signals between the MSP430 and the LDC2114 It can be populated with a standard 2x11 pin 2 54mm header for ease of access It is also possible to break the LDC along the...

Page 9: ...er is packaged in a zip file Follow these steps to install the software 1 Download the latest version of the Sensing Solutions EVM GUI from EVM tool page NOTE The minimum Sensing Solutions GUI revision for this EVM is 1 9 1 The latest GUI can be downloaded here 2 Extract the downloaded ZIP file 3 Run the included executable 4 If prompted by the User Account Control about making changes to the comp...

Page 10: ...eedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 4 Software Installer Wizard 6 Read the license agreement select I accept the agreement and click Next Figure 5 Software Installer License Agreement ...

Page 11: ...tion Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter 7 Use the preselected installation directory and click Next Figure 6 Software Installation Directory 8 Start the installation by clicking Next ...

Page 12: ...bmit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 7 Software Installer Ready 9 Wait for the installation to complete Figure 8 Software Installer in Progress ...

Page 13: ...right 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter 10 When the Device Driver Installation Wizard appears click Next to install the EVM driver Figure 9 Device Driver Installer Wizard 11 Wait for the driver installation to complete ...

Page 14: ...16 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 10 Device Driver Installer in Progress 12 After the driver installation is completed click Finish ...

Page 15: ...cumentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 11 Device Driver Installer Completed 13 Click Finish to complete the installation Figure 12 Software Installer Completed ...

Page 16: ...h Inductance to Digital Converter 4 3 Starting the GUI Follow these steps to start the GUI 1 Select the Windows start menu 2 Select All programs 3 Select Texas Instruments 4 Select Sensing Solutions EVM GU 5 Click Sensing Solutions EVM GU 6 The splash screen will appear for at least two seconds Figure 13 Splash Screen 7 After the splash screen is displayed the main window will open ...

Page 17: ... Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 14 Introduction Page 4 4 Navigating the GUI To navigate to different pages of the GUI follow these steps 1 Click Menu in the upper left corner ...

Page 18: ...ion Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 15 Mouse Hovered Over Menu Button 2 Select the desired page from the menu shown on the left Figure 16 Menu Display After Clicking Button ...

Page 19: ...2 The GUI always shows the connection status on the bottom left corner of the GUI Figure 17 EVM Connected to GUI 4 6 Configuring the EVM Using the Register Page The register page allows users to control the device directly with the register values The user may also use this page to read the current register values on the device 4 6 1 Automatically Update GUI Register Values Using Auto Read Auto re...

Page 20: ...g Auto Read Interval on Register Page 4 6 2 Manually Update Device Register Values There are two methods to change register values update the entire register value or change a single bit within the register The recommended update mode is always Immediate and not Deferred To update register values follow these steps 1 Double click the current value of the register that needs to be changed The text ...

Page 21: ...Digital Converter Figure 19 Selecting a Register s Current Value for Editing on Register Page 2 Type the new hexadecimal value into the box and click enter The text box changes to normal text and the GUI will send a command to the EVM to update the device register To change individual bit values rather that entire register values follow these steps 1 Hover the mouse over the desired bit to change ...

Page 22: ...uch Inductance to Digital Converter Figure 20 Hovering Mouse Over Register Bit Value on Register Page 2 Double click the bit to toggle its value and the register s current value will update automatically 4 6 3 Reading Register Values Without Auto Read To read register values follow these steps 1 Select the register to update by clicking any column of the register row in the table ...

Page 23: ...ents Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 21 Selecting a Register on Register Page 2 Click the Read Register button to update the selected register s current value and bit values in the table Figure 22 Reading the Current Device Register Value on Register Page ...

Page 24: ...ent register settings of the device follow these steps 1 Click the button immediately right to the Auto Read selection drop down Figure 23 Save Register Values to File on Register Page 2 Choose a name for the JSON file and the directory to save it within Then click Save 4 6 5 Loading Previously Saved Configurations To load previously saved register settings from a JSON file follow these steps 1 Cl...

Page 25: ...lutions GUI is capable to configure the device in a more intuitive way than through the direct register values The Configuration page provides an easy to use tool for updating the device configuration and provides additional information about how the device will perform 4 7 1 Changing registers through the Configuration Pane The device configuration must only be changed while STATE_RESET b1 This m...

Page 26: ...ormal Power Mode or the Low Power Mode by toggling the Low Power button in the Channel Settings table for each channel individually 4 7 3 Interrupt polarity The LDC interrupt pin polarity can be chosen in the Interrupt Polarity option of the Global Buttons Settings section 4 7 4 Base tracking Increment The LDC incorporates a baseline tracking algorithm to automatically compensate for any slow chan...

Page 27: ...2 The Anti Common Mode algorithm eliminates false detection when a user presses the panel in certain positions which could cause a common mode change to two or more buttons This feature must be enabled for each applicable channel individually 3 The Anti Deform algorithm filters changes due to metal deformation in the vicinity of one or more buttons Such metal deformation can be accidentally caused...

Page 28: ...apture display and log measurement data The section describes how to use the data measurement tools from the Data Streaming page accessible from the GUI menu 4 8 1 Choosing Visible Channels To select which channel measurements are displayed in the graph check or uncheck the available channels shown next to the graph units Selecting or not selecting the channels only affects the graph and not the d...

Page 29: ...nstruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 28 Select the Data Graph on Data Streaming Page 4 8 2 Logging Data to a File Follow these steps to log measurement data to a file 1 Click the button in the upper right under next to Click to Select Log File ...

Page 30: ...nce to Digital Converter Figure 29 Select Log File Button on Data Streaming Page 2 Select a file name and directory to save the data to and then click the Save button 3 Whenever data streaming is running the data for all channels will be logged to this file The selected file is shown next to the button 4 8 3 Starting and Stopping Data Streaming To start data streaming click the Start button ...

Page 31: ...orated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 30 Start Button on Data Streaming Page To stop data streaming click the Stop button 4 8 4 Data Statistics Click the Show Statistics button to view the measurement statistics Click the Hide Statistics button to hide the measurement statistics ...

Page 32: ...xas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 31 Show Statistics Button on Data Streaming Page Figure 32 Hide Statistics Button on Data Streaming Page 4 8 5 Configuring the Graph To configure the graph click the Show Graph Configuration button ...

Page 33: ... SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 33 Show Graph Configuration Button on Data Streaming Page ...

Page 34: ...ph every ms will add a new sample to the graph at the specified rate The Vertical Scaling allows the user to either manually set the minimum and maximum values of the y axis on the graph or use auto scaling The Autoscale Lock button scales the graph based on the data of the current display and then locks those vertical scaling settings The Sample Counts allows the user to specify the number of sam...

Page 35: ...pyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 35 Changing Number of Samples Displayed in Data Graph By clicking on the green bar and dragging the mouse left or right previous samples in the buffer can be displayed ...

Page 36: ...er Figure 36 Displaying Previous Data Samples on the Data Streaming Page 4 9 Updating the EVM Firmware To upload new firmware to the EVM navigate to the Firmware page from the GUI menu and follow these steps The images below show uploading the FDC2214 EVM firmware but the steps are identical for any LDC FDC or HDC EVM when using their respective firmware files 1 Click the button to select a TI TXT...

Page 37: ...016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 37 Select TI TXT File Button on Firmware Upload Page 2 Select the firmware file and click Open ...

Page 38: ...er 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 38 Selecting TI TXT Firmware File for Upload to EVM 3 Click the Upload Firmware button ...

Page 39: ... to Digital Converter Figure 39 Upload Firmware Button on Firmware Upload Page 4 Wait for the firmware to upload Do NOT disconnect the EVM from the PC at this time Also note that the GUI will disconnect from the EVM The upload process should not take more than one minute If the upload fails or lasts longer than one minute unplug the EVM and restart the GUI Figure 40 Firmware Upload in Progress ...

Page 40: ...I www ti com 40 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 41 Firmware Upload Success ...

Page 41: ...L_3 3 OUT0_3 3 OUT1_3 3 OUT2_3 3 OUT3 ADDR_3 3 Layout note Route traces between L R header columns on inner layers GND2 SDA_3 3 SCL_3 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 17 19 21 16 18 20 22 J4 TSW 111 07 G D Copyright 2016 Texas Instruments Incorporated www ti com LDC2114 EVM REV A Schematics and Layout 41 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Inco...

Page 42: ...ed as active high in device register settings Copyright 2016 Texas Instruments Incorporated IN 1 OUT 5 2 EN 3 NC 4 GND U5 LP5951MG 1 8 NOPB 3 3V 2 2µF C17 1 8V GND GND 2 2µF C16 GND Power 1 8V LDO for LDC211x TP2 Copyright 2016 Texas Instruments Incorporated LDC2114 EVM REV A Schematics and Layout www ti com 42 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments In...

Page 43: ...7 8 J6 0 R37 1 2 J7 TSW 102 07 G S Layout note move C1 C2 C3 C4 close to DUT 1µF C2 0 1µF C1 47pF C6 47pF C5 47pF C3 47pF C4 GND IN3 COM TP9 TP10 TP11 TP1 TP12 TP13 COM 1000pF C9 TP14 TP15 5 4 1 2 3 6 7 8 MP1 MP2 J3 Copyright 2016 Texas Instruments Incorporated www ti com LDC2114 EVM REV A Schematics and Layout 43 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments...

Page 44: ...evel shift from 1 8V LDC211x to 3 3V MSP430 Design note DIR Hi sends signals from A ports to B ports Design note PD for LDC2114 PU for LDC2112 Design note UNPOP for LDC2112 Design note Send INTB LDC2114 MSP430 Design note Send LPWRB MSP430 LDC2114 GND 0 R16 Design note DIR Hi sends signals from A ports to B ports OUT3 ADDR Copyright 2016 Texas Instruments Incorporated LDC2114 EVM REV A Schematics ...

Page 45: ... 8V Design note VREF2 must be 1 8V 3 3V or 5V if VREF1 1 8V 4 7k R13 3 3V 3 3V 4 7k R12 Copyright 2016 Texas Instruments Incorporated www ti com LDC2114 EVM REV A Schematics and Layout 45 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 48 Level shift for I2C ...

Page 46: ...VCC 1 NC 2 IO1 3 GND 4 IO2 5 U4 TPD2E001DRLR VBUS GND 10 0 R7 10 0 R8 USB D USB D MSP_PUR MSP_DP Layout note place U4 C18 C19 and D1 next to J1 VBUS 1 D 2 D 3 ID 4 GND 5 6 7 8 11 10 9 J1 10118193 0001LF Copyright 2016 Texas Instruments Incorporated LDC2114 EVM REV A Schematics and Layout www ti com 46 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated...

Page 47: ... TA1 1 26 P2 1 TA1 2 27 P2 2 TA2CLK SMCLK 28 P2 3 TA2 0 29 P2 4 TA2 1 30 P2 5 TA2 2 31 P2 6 RTCCLK DMAE0 32 P2 7 UCB0STE UCA0CLK 33 P3 0 UCB0SIMO UCB0SDA 34 P3 1 UCB0SOMI UCB0SCL 35 P3 2 UCB0CLK UCA0STE 36 P3 3 UCA0TXD UCA0SIMO 37 P3 4 UCA0RXD UCA0SOMI 38 DVSS2 39 DVCC2 40 P4 0 PM_UCB1STE PM_UCA1CLK 41 P4 1 PM_UCB1SIMO PM_UCB1SDA 42 P4 2 PM_UCB1SOMI PM_UCB1SCL 43 P4 3 PM_UCB1CLK PM_UCA1STE 44 P4 4...

Page 48: ...5 D4 D3 MSP430 GPIO Breakout connector and General purpose LEDs 1 2 3 4 5 6 7 8 9 10 11 12 J2 TSW 106 07 G D P2 0 P2 1 Copyright 2016 Texas Instruments Incorporated LDC2114 EVM REV A Schematics and Layout www ti com 48 SNOU144 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figur...

Page 49: ...ember 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 53 LDC2114 Layout Top Layer Overview Figure 54 LDC2114 Layout Top Layer Signals and Components ...

Page 50: ...er 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 55 LDC2114 Layout MidLayer 1 Ground Plane Figure 56 LDC2114 Layout MidLayer 2 Signals and Power Plane ...

Page 51: ...4 December 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Figure 57 LDC2114 Layout Bottom Layer Signals Plane Figure 58 LDC2114 Bottom Layer Overview ...

Page 52: ...1 100pF CAP CERM 100 pF 50 V 5 C0G NP0 0402 CC0402JRNPO9BN101 Yageo America C23 C24 2 18pF CAP CERM 18 pF 50 V 5 C0G NP0 0402 GRM1555C1H180JA01D MuRata C25 C28 2 0 22uF CAP CERM 0 22 µF 16 V 10 X7R 0402 C1005X7R1C224K050BC TDK C26 1 2200pF CAP CERM 2200 pF 16 V 10 X7R 0402 885012205027 Wurth Elektronik C27 1 0 47uF CAP CERM 0 47 µF 10 V 10 X7R 0603 C0603C474K8RACTU Kemet D1 1 5 6V Diode Zener 5 6 ...

Page 53: ...CW06030000Z0EA Vishay Dale U1 1 Four channel Inductive Sensor for Touch on Metal Application YFD0016ALAL LDC2114YFDR Texas Instruments U2 1 Micropower 150mA Low Dropout CMOS Voltage Regulator 5 pin SC 70 Pb Free LP5951MG 3 3 NOPB Texas Instruments U3 U7 2 4 Bit Dual Supply Bus Transceiver with Configurable Voltage Translation and 3 State Outputs RSV0016A SN74AVCH4T245RSVR Texas Instruments U4 1 Lo...

Page 54: ...Incorporated LDC2114 Evaluation Module for Inductive Touch Inductance to Digital Converter Table 3 BOM for LDC2114EVM rev A continued DESIG NATOR QTY VALUE DESCRIPTION PART NUMBER MANUFACTURER R14 R15 0 4 7k RES 4 7 k 5 0 063 W 0402 CRCW04024K70JNED Vishay Dale R16 R33 R34 R35 R36 0 0 RES 0 5 0 063 W 0402 RC0402JR 070RL Yageo America ...

Page 55: ... set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warra...

Page 56: ...the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la réglementation d Industrie Canada le présent émetteur radio peut fo...

Page 57: ...er guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pa...

Page 58: ...COST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN TWELVE 12 MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS OCCURRED 8 2 Specif...

Page 59: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

Page 60: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments LDC2114EVM ...

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