LDC1000 Evaluation Module
User's Guide
Literature Number: SNAU150
September 2013
1.1 Overview
The LDC1000 Evaluation Module is designed to provide an example LC tank and coil structure
application, to interface to a host computer. The module can be used independently of the GUI by the onboard embedded LED, which demonstrates threshold detection.
Chapter 1
SNAU150–September 2013
LDC1000 Evaluation Module
Figure 1-1. Evaluation Module
The EVM includes an example PCB sensor which is 14mm in diameter and contains 2 layers. A 100pF
1% COG cap is connected, in parallel, to the PCB coil, in order to form an LC tank.
The EVM is perforated at two locations: One between Coil and LDC1000, which provides the option to
snap the PCB coil and connect a custom coil required in the application. The second perforation is
between LDC1000 and MSP430, and provides the option to connect the LDC1000+Sensor into a different
system or use multiple of such sensors in one system for prototyping.
Figure 1-2. LDC1000+Sensor
When the evaluation module first powers up from the USB port, it will flash a series of green and red LED
lights to indicate self-test. When self-test is finished, the green LED indicates the status of the LDC1000
INT pin. When INT is asserted, the green LED is lit. By default, INT is configured for threshold detection.
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Quick Start Guide LDC1000 Evaluation Module
2.1 LDC1000 Evaluation Module Overview
The LDC1000 Evaluation Module (EVM) enables the user to test out analog and digital capabilities of the
LDC1000 Inductance-to-Digital Converter. The EVM is a USB device used with a host computer and
accessed using the Inductive Sensing Graphical User Interface (GUI) software, which is documented in
Chapter 3.
To quickly get started on the LDC1000 GUI, follow the steps below to load and configure a device.
2.1.1 Evaluation Module
Set Up Requirements
1. The LDC1000 GUI and drivers must be installed on the host.
2. The USB port of the EVM must be connected to the host.
Loading and Running
1. Plug the EVM into the host computer. The host computer should automatically detect the device as
LDC1000EVM.
2. Launch the GUI. It should automatically detect the target, read all the configuration registers, and begin
streaming data.
Chapter 2
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Figure 2-1. Streaming Section
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LDC1000 Evaluation Module Overview
Reloading the Device
If the EVM is disconnected from the host at any time, simply reconnect the device and the GUI will
automatically discover and re-establish the streaming abilities with the device.
Configuring the Device Manually
1. The GUI puts the device in streaming mode by default. Click on "Stop" in the Streaming Section to
stop streaming.
2. Click on the "Configuration Section" icon in the main window toolbar.
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Figure 2-2. Stop Streaming
Figure 2-3. Configuration Section Icon
3. Select the parameter to change. When entering the comparator thresholds, press ENTER to confirm
the change. Changes are applied immediately.
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LDC1000 Evaluation Module Overview
Saving Device Configuration
1. Click on the "Save" icon in the toolbar.
2. Type a name for the file.
Configuring the Device with Configuration File Defaults
1. The GUI puts the device in streaming mode by default. Click on "Stop" in the Streaming Section to
stop streaming.
2. Click on the "Open" icon in the toolbar.
3. Select the configuration file.
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Figure 2-4. Configuration Section
Figure 2-5. Save Icon
Figure 2-6. Open Icon
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LDC1000 Evaluation Module Overview
4. After the configuration file is loaded, current values are written once to all supported registers. To
restore defaults defined in the configuration file, click on Restore Defaults to write all current registers
with the new configuration file defaults.
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Figure 2-7. Restore Defaults
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3.1 Inductive Sensing GUI Overview
The inductive sensing GUI provides graphical configuration and streaming support for the LDC1000. The
GUI package includes drivers for use with the LDC1000 Evaluation Modules (EVM). The EVM
provides a device abstraction layer for the GUI to communicate with the LDC1000 through SPI, and
includes other extended functionality.
3.2 Host platform Requirements
The Inductive Sensing GUI supports:
• 32-bit and 64-bit Windows 7
• 32-bit and 64-bit Windows XP
The host machine is required for device configuration and data streaming.
3.3 EVM Information
For the TI LDC1000 EVM:
• The EVM allows the GUI to:
– Configuring register data through SPI (CSB, SCLK, SDO, SDI)
– Stream register data through SPI
– Stream register data through SPI
– Detect interrupts through SPI
Chapter 3
SNAU150–September 2013
Inductive Sensing GUI User Guide
3.4 Hardware Setup
Below are the steps which are necessary to prepare the EVM for the GUI:
• The GUI must be installed on the host.
• The EVM driver must be installed on the host.
• The EVM must be connected to a full speed USB port (1.0 or above).
3.5 Icon Toolbar
The icon toolbar contains various icons which navigate between sections and perform various functions.
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Figure 3-1. Icon Toolbar
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Connecting and Disconnecting
Name Description Icon
Connection Information Indicates whether an EVM is connected to
the PC, and if so, provides details of the
connected device.
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• EVM is connected
• EVM is disconnected
Open Opens saved register settings and
Save Saves all current register settings and
Register Settings Show Register Settings Section
Configuration Show Configuration Section
Streaming Show Streaming Section
3.6 Connecting and Disconnecting
Device discovery, connection, and disconnection is performed automatically.
3.7 Multiple EVMs
If the user desires to connect to multiple EVMs, multiple instances of the GUI can be launched. Multiple
instances cannot connect to the same EVM; only one instance of the GUI can be connected to one EVM.
3.8 General Configuration
defaults
defaults
In the configuration section, all registers of the device can be accessed. To access this section, streaming
must be stopped.
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Register Settings
In the configuration window, select the parameter to change. When entering the comparator thresholds,
press ENTER to confirm the change. Changes are applied immediately.
Press “Read All” to refresh all configuration, status, and data.
Press “Restore Defaults” to write values from the default column (if they exist) to the current register value.
3.9 Register Settings
In the register settings section, all registers of the device can be accessed. To read/write registers,
streaming must be stopped.
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Figure 3-2. Configuration Section
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Data Streaming
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Double-click on a register in the table to read/write. If a register is read only, the selected register is read
immediately and the table value updated. If the register is read/write, a dialog pops up and the user can
choose a new register value. If the value is not changed, it will default to a read.
Press “Read All” to refresh all configuration, status, and data.
Press “Restore Defaults” to write values from the default column (if they exist) to the current register value.
3.10 Data Streaming
Data is streamed from the EVM to the GUI when streaming is started. The sampling rate of the EVM and
the number of samples to plot can be configured.
Figure 3-3. Register Settings
Figure 3-4. Read/Write Register Dialog
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Figure 3-5. Streaming Configuration
The sampling rate can only be set when streaming is stopped.
3.10.1 Average, Point, Min, Max Values
Average is the default display type. To toggle between sample point, min, and max values, right-click the
display.
Average The average of all the data points currently in the plot
Point The newest data point value currently in the plot
Min The minimum data point value currently in the plot
Max The maximum data point value currently in the plot
A larger number of samples would result in a larger averaging window.
3.10.2 Zooming and Scaling
Plots are interactive. Zooming options are available by right-clicking the plot and selecting an option from
the context menu.
Data Streaming
Zoom to... Zooms to window
Autoscale Autoscales the data in the plot
Reset Resets the Zoom window to its default setting
Help Displays shortcut keys and mouse mappings for scaling and
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Figure 3-6. Plot Context Menu
zooming
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Saving and Loading
3.10.3 Threshold Display
To display Rp Thresholds, right-click the plot and select “Toggle Markers.”
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Figure 3-7. Toggling Markets
3.11 Saving and Loading
3.11.1 Configurations
Configurations can be saved and loaded. To save a configuration, click on the "Save" icon. To load a
configuration, click on the "Open" icon.
Configurations include all register names, current values, and default values. They are saved in CommaSeparated Files (*.csv) and can be modified using a text or spreadsheet editor.
3.11.2 Plot Data
Right-click a plot and select “Save Data…”
Data can be saved to a new file or an existing one. If an existing file is chosen, data will be appended.
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Saving and Loading
Figure 3-8. Saving Data from a plot
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4.1 LDC1000 Schematics
Chapter 4
SNAU150–September 2013
Schematics
14
Schematics SNAU150–September 2013
Figure 4-1. Layout
Figure 4-2. Top Layer
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LDC1000 Schematics
Figure 4-3. Bottom Layer
SNAU150–September 2013 Schematics
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Chapter 5
SNAU150–September 2013
Bill of Materials
Designator Quantity Description Manufacturer Part Number
C1 1 CAP, CERM, 2.2uF, 10V, Kemet C0603C225K8PACTU
C2 1 CAP CER 10UF 10V 10% TDK Corporation C1608X5R1A106K080AC
C3, C5, C11, C12, C16, 6 CAP CER 0.1UF 16V 5% Murata Electronics North GRM155R71C104JA88D
C19 X7R 0402 America
C4 1 CAP, CERM, 0.01uF, TDK C1608C0G1E103J
C6 1 CAP CER 220PF 50V 1% TDK Corporation C1005C0G1H221F050BA
C7 1 CAP, CERM, 2200pF, Kemet C0603X222K5RACTU
C8, C9 2 CAP CER 18PF 100V 5% MuRata GRM1885C2A180JA01D
C10 1 CAP, CERM, 220pF, 50V, AVX 06035A221FAT2A
C13, C15 2 CAP, CERM, 1uF, 10V, MuRata GRM155R61A105KE15D
C14 1 CAP CER 0.056UF 16V Kemet C0402C563J4RACTU
C17 1 CAP, CERM, 0.47uF, Kemet C0603C474K8RACTU
C18 1 CAP CER 20PF 50V 5% Kemet C0805C200J5GACTU
C_Tank 1 CAP CER 100PF 50V 1% AVX Corporation 06035A101FAT2A
D1 1 LED SMARTLED GREEN OSRAM Opto LG L29K-G2J1-24-Z
D2 1 LED 660NM SUPER RED Lumex Opto/Components SML-LX0603SRW-TR
D21 1 Diode, Zener, 5.6V, Diodes Inc. MMSZ5232B-7-F
FID1, FID2, FID3 3 Fiducial mark. There is N/A N/A
J1 1 Connector, USB Type A, Molex 48037-2200
L1 1 INDUCTOR POWER TDK Corporation VLS201610ET-100M
R1, R2 2 RES, 33 ohm, 5%, Vishay-Dale CRCW040233R0JNED
R5 1 RES, 33k ohm, 5%, Vishay-Dale CRCW040233K0JNED
R6, R7 2 RES 1K OHM 1/10W 5% Panasonic Electronic ERJ-2GEJ102X
R20 1 RES,1M ohm, 5%, Yageo RC0402JR-071ML
R40 1 RES 1.5K OHM 1/16W Vishay Dale CRCW04021K50JNED
+/-10%, X5R, 0603
X5R 0603
25V, +/-5%, C0G/NP0,
0603
NP0 0402
50V, +/-10%, X7R, 0603
NP0 0603
+/-1%, C0G/NP0, 0603
+/-10%, X5R, 0402
5% X7R 0402
10V, +/-10%, X7R, 0603
NP0 0805
NP0 0603
570NM 0603 Semiconductors Inc
DIFF 0603SMD Inc
500mW, SOD-123
nothing to buy or mount.
4POS R/A, SMD
10UH .45A SMD
0.063W, 0402
0.063W, 0402
0402 SMD Components
0.063W, 0402
5% 0402 SMD
16
Bill of Materials SNAU150–September 2013
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Designator Quantity Description Manufacturer Part Number
U1 1 Micropower 150 mA Low- Texas Instruments LP2985AIM5-3.3/NOPB
Noise Ultra Low-Dropout
Regulator, 5-pin SOT-23,
Pb-Free
U2 1 4-CHANNEL ESD- Texas Instruments TPD4E004DRY
PROTECTION ARRAY
FOR HIGH-SPEED DATA
INTERFACES, DRY006A
U3 1 MCU Texas Instruments MSP430F5528IRGCR
U4 1 Inductance to Digital Texas instruments LDC1000
Converter
Y1 1 CRYSTAL 24.000MHZ Abracon Corporation ABMM-24.000MHZ-B2-T
18PF SMD
J2 0 TERM BLOCK 2POS FCI 20020327-D021B01LF
3.81MM PCB HORIZ
J4 0 Header, TH, 100mil, 2x1, Samtec, Inc. TSW-102-07-G-S
Gold plated, 230 mil
above insulator
SNAU150–September 2013 Bill of Materials
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