Texas Instruments BOOST-LDC3114EVM User manual

User’s Guide

BOOST-LDC3114 Evaluation Module User's Guide

ABSTRACT

This user's guide describes the characteristics, operation, and use of the BOOST-LDC3114 Evaluation Module

(EVM). Complete schematic diagrams, printed-circuit board layouts, and bill of materials are included in this

document.

Table of Contents

1 Overview..................................................................................................................................................................................2

1.1 EVM Kit Contents...............................................................................................................................................................3

1.2 Compatible Sensors...........................................................................................................................................................3

1.3 Main EVM Elements...........................................................................................................................................................3

2 EVM GUI...................................................................................................................................................................................4

2.1 System Requirements........................................................................................................................................................4

2.2 Installation.......................................................................................................................................................................... 4

2.3 Navigation.......................................................................................................................................................................... 5

2.4 Firmware Updates..............................................................................................................................................................7

3 Schematic................................................................................................................................................................................8

4 Layout...................................................................................................................................................................................... 9

5 Bill of Materials..................................................................................................................................................................... 10

Trademarks

All trademarks are the property of their respective owners.

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BOOST-LDC3114 Evaluation Module User's Guide 1

1 Overview

The LDC3114EVM demonstrates the use of inductive sensing technology to sense and measure the presence or

position of a conductive target object and to detect the press of an inductive touch button. The LDC3114EVM is

controlled by an MSP432, which connects to a host computer.

The EVM is comprised of two boards, the LDC board and the MSP board. This is set up as a boosterpack and

allows the LDC board to be used with a different microcontroller.

Figure 1-1. BOOST-LDC3114EVM

Figure 1-2. LDC3114EVM and PAMB Controller

Overview www.ti.com

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1.1 EVM Kit Contents

Table 1-1 details the contents of the EVM kit. Contact the nearest Texas Instruments Product Information Center

if any components are missing.

Table 1-1. EVM Kit Contents

Item Quantity

BOOST-LDC3114EVM 1

PAMB Controller Board 1

Micro-USB Cable 1

1.2 Compatible Sensors

The LDC3114EVM includes four identical example sensors that are perforated so they can be removed and

replaced with different sensors by soldering onto the provided header pin locations. The LDCCOILEVM and

LDCTOUCHCOMCOILEVM both have compatible sensors that can be used with the LDC3114EVM. Other

sensors can be connected to the input headers with an unshielded twisted pair of wires.

1.3 Main EVM Elements

Figure 1-3 shows the layout of the LDC3114EVM and points out various features. The sensor coils are located

on a perforated section of the board so that they can be placed remotely from the sensor or replaced with other,

compatible sensors by using the sensor connection headers.

The LDC3114EVM has multiple test points designated for the power, ground, I2C, and output pins. Additionally,

the button detection LEDs on the output pins are located in the center of the board.

Figure 1-3. EVM Features

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BOOST-LDC3114 Evaluation Module User's Guide 3

2 EVM GUI

The LDC3114EVM GUI provides direct device register access and data streaming.

2.1 System Requirements

The LDC3114EVM software is compatible with Windows, Mac, and Linux operating systems. The online

software works with Chrome, Firefox, and Safari browsers.

2.2 Installation

The GUI software for the LDC3114EVM runs on TI's GUI Composer framework. The software is available as a

live version that runs in a browser and as a download for offline use.

Download and install the PAMB Controller drivers from https://www.ti.com/lit/zip/sbac253. This is a one-time only

setup.

Access the online version by navigating to https://dev.ti.com/gallery/search/LDC3114EVM_GUI. To access the

offline GUI, mouse over the download icon, select your operating system from the list and follow the installation

instructions.

Figure 2-1. Download Pop-Up

EVM GUI www.ti.com

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2.3 Navigation

For first time use, follow the prompts for TI Cloud Agent Installation:

Figure 2-2. Initial GUI Setup

After successful completion of the previous steps it should read "Hardware Connected" in the bottom left corner.

If the hardware is not recognized, select Options->Serial Port..., then select the correct port and click "Ok".

The main page has the device name and links to other pages in the GUI.

2.3.1 Registers

The Registers page allows the user to read and write to the device registers. Additionally, the Auto Read function

will default to Off, but can be set to the following speeds:

• Every 1 sec

• Every 5 sec

• Every 10 sec

• Every 20 sec

• Every 30 sec

• Every 60 sec

• As fast as possible

Figure 2-3. Registers Page

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BOOST-LDC3114 Evaluation Module User's Guide 5

2.3.2 Data Plot

In the Data Plot tab the data will be read as fast as the register is set. The graph can be configured as either

Button Data or Raw Data, depending on register settings.

Make sure to select the correct view for the selected data, either Button Data or Raw Data. The data plot can be

saved as a .csv file or cleared by clicking either the "Save Plot" or "Clear Plot" icons.

Figure 2-4. Data Plot

2.3.3 Settings

The Settings page has select register settings that can be controlled directly, as well as GPIO settings.

Figure 2-5. Settings

EVM GUI www.ti.com

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2.3.4 Collateral

The Collateral page is where the user can find links to various resources, including data sheets, application

notes, firmware, and any applicable reports.

Figure 2-6. Collateral Page

2.4 Firmware Updates

If there are issues with the PAMB controller such that it is unable to connect to the GUI or the LEDs do not light

the firmware may need to be re-flashed via batch file.

Before this can be done the PAMB controller must be put back into Device Firmware Upgrade (DFU) mode. The

steps to put the controller into DFU mode are as follows:

1. With the USB cable unplugged, remove the LDC3114 daughter card from the PAMB.

2. Locate the two test points near the PK1 and PK2 header pins.

3. Reconnect the USB cable to power the USB board.

4. With a pair of metal tweezers or wire, short and hold the connection between the PK1 and PK2 test points.

5. With the test points still shorted, press and release the RESET button (SW1) on the PAMB board.

6. If successful, none of the LEDS on the PAMB board will be on.

7. Launch the LDC3114EVM GUI.

8. Navigate to File > Program Device to launch the firmware update. Wait for the firmware to update and do not

disconnect the USB cable or press the RESET button during the update.

9. Once the update is complete the EVM firmware should reboot and connect to the GUI. If it doesn't reconnect

momentarily, press the RESET button OR unplug and plug in the USB cable to reconnect.

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BOOST-LDC3114 Evaluation Module User's Guide 7

3 Schematic

GND

OUT0

GND GND GND

OUT3

Green

OUT1 OUT2

Q2A

MMDT3904-7-F

Q2B

MMDT3904-7-F

Q3A

MMDT3904-7-F

Q3B

MMDT3904-7-F

+3.3V +3.3V +3.3V +3.3V

1.0k

4.70k

R10

4.70k

R11

4.70k

R12

Design note: 4mA

Bridge between LDC and MSP430

Button press LEDs

Sensor connectors

PU/PD for LDC inputs

LPWRB

INTB

SCL

OUT0

SDA

OUT1

OUT2

OUT3

IN2

IN1

IN0

GND

+1.8V

COM

GND GND

LDC3114

Layout note: move to bottom side

+1.8V

GND

LPWRB

Silk: BOOST-LDC3114EVM, SENS072A

Silk: Draw Silkscreen box around red area

Silk: OUT0 Silk: OUT1 Silk: OUT2 Silk: OUT3

Silk: GND

Design note: Default to pullup

Layout note: move C1,C2,C3,C4 close to DUT

Design note: OUTPUTS must be conﬁgured as active high in device register settings

Level 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 LDC3114

Design note: Send INTB LDC3114->MSP430

Design note: Send LPWRB MSP430->LDC3114

SDA

SCL

1uF

0.1uF

Design note: DIR=Hi sends signals from A ports to B ports

1OUT 5

3NC 4

GND

U2 PM-REG-LP3990- SOT5

+3.3V

2.2uF

+1.8V

GND

2.2uF

GND

Power: 1.8V LDO for LDC211x

Silk: +1.8V

47pF

C11

47pF

C12

47pF

C13

47pF

C14

GND

IN3

1000pF

C16

PM7

PA7

PQ1

PM6

PQ2

PQ3

TARGET_RESET

PN3

PN2

PG1

PK4

PK5

PM0

PM1

PM2

PH0

PH1

PK6

PK7

PB4

PB5

PK0

PK1

PK2

PK3

PA4

PA5

+5V

+3.3V

PD2

PP0

PP1

PQ0

PH3

PN5

PN4

PD4

PD5

GND

5 6

9 10

1211

1413

1615

1817

2019

5 6

9 10

1211

1413

1615

1817

2019

PK7

PK6

PH1

PH0

PM2

PN5

PN4

PM1

Note: Maps the LDC pins to the PAMB pins

GND

Green

Q1B

MMDT3904-7-F

+3.3V

1.0k

4.70k

J10

Header_2x1

+3.3V+3.3V

IN0

1.00k

R13

1.00k

R15

IN1

1.00k

R14

1.00k

R16

IN2

IN3

Design Note: DNP 1K RES

IN0 IN2

IN3IN1

OUT0 OUT1 OUT2 OUT3

LPWRB INTB

SCL SDA

1.8V

GND

Header_2x1

390pF

C17

390pF

C15

390pF

C10

Design note: Perforate between sensors and between c onnectors

Design note: DNP Jumpers

IN0

COM

IN1

COM

IN3

IN2

INTB

LPW RB_3.3

4.70k

R17

4.70k

R18

1A1

1OE 1

VCCB 2

1DIR

VCCA

2DIR

1A2

2A1

2A2

GND 10

GND 11

2B2 12

2B1 13

1B2 14

1B1 15

2OE 16

SN74AVCH4T245RSV

+1.8V+3.3V

0.1uF

OUT1

GND

OUT1_3.3

OUT0_3.3 OUT0

GND

GND OUT3_3.3

OUT2_3.3

OUT2

GND

OUT3

1A1

1OE 1

VCCB 2

1DIR

VCCA

2DIR

1A2

2A1

2A2

GND 10

GND 11

2B2 12

2B1 13

1B2 14

1B1 15

2OE 16

SN74AVCH4T245RSV

+1.8V+3.3V

0.1uF

LPWRB

+3.3V

GND

LPWRB_3.3

1.00k

R19

COM

IN0

IN1

IN2

IN3

SDA

VDD

GND 2

GND 10

INT 5

LPW R 3

OUT0 15

OUT1 13

OUT2 12

OUT3 11

SCL

LDC3114PWR

COM

Figure 3-1. Schematic

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4 Layout

Figure 4-1. Top View Layout

Figure 4-2. Bottom View Layout

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BOOST-LDC3114 Evaluation Module User's Guide 9

5 Bill of Materials

Table 5-1. BOOST-LDC3114EVM BOM

Designator QTY Value Description Package Reference Part Number Manufacturer

!PCB1 1 Printed Circuit Board SENS072 Any

1.8V, COM,

GND, IN0, IN1,

IN2, IN3, INTB,

LPWRB, OUT0,

OUT1, OUT2,

OUT3, SCL,

SDA

15 Test Point, Miniature, SMT Testpoint_Keystone_

Miniatur

5015 Keystone

C1, C2, C5, C6,

5 0.1uF CAP, CERM, 0.1 uF, 50 V, +/- 10%, X7R,

0402

0402 C1005X7R1H104K0

50BB

TDK

C3, C4 2 2.2uF CAP, CERM, 2.2 uF, 10 V, +/- 10%, X5R,

0603

0603 C0603C225K8PACT

Kemet

C7, C10, C15,

C17

4 390pF CAP, CERM, 390 pF, 50 V, +/- 1%, C0G/

NP0, 0603

0603 CC0603FRNPO9BN

391

Yageo America

C8 1 1uF CAP, CERM, 1 uF, 6.3 V, +/- 20%, X7R,

0402

0402 GRM155R70J105M

A12D

MuRata

C11, C12, C13,

C14

4 47pF CAP, CERM, 47 pF, 50 V, +/- 1%, C0G/NP0,

0603

0603 GRM1885C1H470F

A01J

MuRata

C16 1 1000pF CAP, CERM, 1000 pF, 50 V, +/- 1%, C0G/

NP0, 0603

0603 GRM1885C1H102F

A01J

MuRata

D1, D2, D3, D4,

5 Green LED, Green, SMD 1.7x0.65x0.8mm LG L29K-G2J1-24-Z OSRAM

H1 1 Kitting Item: PAMB Controller DC081 Texas Instruments

H2 1 Kitting Item: 3025010-03; Cable, USB A

MALE to Micro B MALE 3'; CDDS 6612041

6612041 Qualtek

J1, J2 2 Receptacle, 2.54mm, 10x2, Tin, TH Receptacle,

2.54mm, 10x2, TH

SSQ-110-03-T-D Samtec

Q1, Q2, Q3 3 40 V Transistor, Dual NPN, 40 V, 0.2 A, SOT-363 SOT-363 MMDT3904-7-F Diodes Inc.

R1, R5, R6, R7,

5 1.0k RES, 1.0 k, 5%, 0.1 W, AEC-Q200 Grade 0,

0402

0402 ERJ-2GEJ102X Panasonic

R2 1 0 RES, 0, 5%, 0.1 W, AEC-Q200 Grade 0,

0603

0603 ERJ-3GEY0R00V Panasonic

R4, R9, R10,

R11, R12, R17,

R18

7 4.70k RES, 4.70 k, 1%, 0.1 W, 0402 0402 ERJ-2RKF4701X Panasonic

U1, U3 2 4-Bit Dual-Supply Bus Transceiver with

Configurable Voltage Translation and 3-

State Outputs, RSV0016A (UQFN-16)

RSV0016A SN74AVCH4T245R

SVR

Texas Instruments

U2 1 Micropower, 150mA Low-Dropout CMOS

Voltage Regulator, 5-pin SC-70, Pb-Free

DCK0005A LP5951MG-1.8/

NOPB

Texas Instruments

U4 1 4-channel hybrid inductive touch and

inductance to digital converter

TSSOP16 LDC3114PWR Texas Instruments

FID1, FID2,

FID3

0 Fiducial mark. There is nothing to buy or

mount.

N/A N/A N/A

J3, J4, J5, J6,

J7, J8, J9, J10

0 Header, 100mil, 2x1, Gold, TH 2x1 Header TSW-102-07-G-S Samtec

R3 0 0 RES, 0, 5%, 0.1 W, AEC-Q200 Grade 0,

0603

0603 ERJ-3GEY0R00V Panasonic

R13, R14, R15,

R16, R19

0 1.00k RES, 1.00 k, 1%, 0.1 W, 0603 0603 ERJ-3EKF1001V Panasonic

Bill of Materials www.ti.com

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