Texas Instruments TDC7201-ZAX-EVM User Manual

User's Guide

SNAU198A–May 2016–Revised May 2016

TDC7201-ZAX-EVM

This guide details the use of the TDC7201-ZAX-EVM Evaluation Module (referred to as TDC7201EVM for the remainder of this document). The TDC7201EVM is an evaluation module that allows users to evaluate the operation and performance of the TDC7201 Time-to-Digital Converter. One example application that requires accurate time-to-digital conversion is LIDAR.

The TDC7201EVM connects to the MSP430 LaunchPad evaluation kit for capturing data, and it connects to a user-friendly Graphic User Interface (GUI) to modify the registers and display the data.

Contents

1 General Description ......................................................................................................... 1

2 Equipment List ............................................................................................................... 3

3 Quick Start.................................................................................................................... 3

4 Software Installation......................................................................................................... 4

5 Hardware Configuration..................................................................................................... 7

6 GUI and Operation......................................................................................................... 10

7 Board Layout................................................................................................................ 14

8 TDC7201EVM Schematic................................................................................................. 17

9 Bill of Materials ............................................................................................................. 19

Trademarks

1 General Description

1.1 TDC7201EVM Key Features

1. Evaluate TDC7201 Time-to-Digital Converter

2. Connects with MSP430 Launch Pad (MSP-EXP430F5529LP)

3. User-friendly TDC720xEVM GUI interface

4. Connection for START1, START2, STOP1, and STOP2 inputs

5. Powered by MSP430 LaunchPad (no external power needed)

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TDC7201-ZAX-EVM

General Description

1.2 TDC7201EVM

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Figure 1. TDC7201EVM Evaluation Board

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2 Equipment List

1. TDC7201EVM

2. TDC720xEVM GUI (http://www.ti.com/tool/tdc7201-zax-evm)

3. MSP430 launchpad (http://www.ti.com/tool/msp-exp430f5529lp)

4. Micro-USB cable

5. Dual function generator (for example: Tektronix AFG3102 1GS/s, 100MHz)

6. PC with Windows XP or Windows 7

7. 4 BNC-to-SMA cables

3 Quick Start

1. Download and Install TDC720xEVM (GUI) Software. See Section 4 for more information.

2. Connect the USB cable from the MSP430 LaunchPad to the PC.

3. Connect the TDC7201EVM to the MSP430 LaunchPad via J1 and J2.

4. Connect START1 and STOP1 pulses to the TDC7201EVM via J5 and J4. See Section 5 for more information.

5. Launch the GUI. See Section 6 for more information.

6. On the GRAPH tab, press the START GRAPH button.

Equipment List

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Software Installation

4 Software Installation

This section describes software installation, firmware upgrade, and how to update USB Driver.

4.1 Installing the TDC720xEVM GUI

1. Download the TDC720xEVM Software GUI zip file to your desktop. This should be located in

http://www.ti.com/tool/tdc7201-zax-evm.

2. Unzip the file.

3. Run the setup.exe file.

4. Follow the instructions to install the GUI.

5. Once done, you should be able to see the installation in default installation folder; for example, C:\Program Files (x86)\Texas Instruments\TDC720xEVM.

4.2 MSP430 Firmware Upgrade (This is only needed for a new Launchpad.)

1. Open the TDC720xEVM GUI.

2. Click on the Debug tab.

3. Click on Update Firmware.

4. Click Next to proceed on the first prompt; read and accept the license agreement, and click Next to continue.

5. Choose Select Firmware, and then click Browse.

a. Go to the folder where you downloaded the TDC720xEVM GUI. The default install folder is

C:\Program Files (x86)\Texas Instruments\TDC720xEVM

b. Find the Firmware folder. It is located within the default installation folder, C:\Program Files

(x86)\Texas Instruments\TDC720xEVM\Firmware

c. Select the TDC720xEVM firmware text file.

6. On the MSP430 LaunchPad board, press the BSL button (S5) and connect the MSP430 Launch Pad to your PC using a USB cable. If detected, the text displayed on the Firmware Upgrade tool changes from No device connected to Found 1 device. See Figure 2.

7. On the MSP430 USB Firmware Upgrade GUI, click Upgrade Firmware.

8. Click Close when done.

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Figure 2. Upgrading MSP430 Firmware

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4.3 Checking Connection

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.

2. If you haven’t done so, connect the TDC7201EVM to the MSP430 Launch Pad via J1 and J2 as shown in Figure 6.

3. Open the computer’s Device Manager . To do this, right-click My Computer, click Properties, and select Device Manager.

4. Scroll down to Ports (COM & LPT) and check TDC7200EVM (COMx) connection as shown in

Figure 3.

Software Installation

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Figure 3. Device Manager

TDC7201-ZAX-EVM

Software Installation

4.4 Opening the GUI

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.

2. If you haven’t done so, connect the TDC7201EVM to the MSP430 Launch Pad via J1 and J2 as shown in Figure 6.

3. Run the TDC720xEVM GUI from the Start Menu. By default, it is located in Programs\Texas Instruments\TDC720xEVM.

4. GUI should automatically connect and show the screen depicted in Figure 4.

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Figure 4. TDC720xEVM GUI

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5 Hardware Configuration

This section describes how to properly set up the connections on the EVM

5.1 TDC7201EVM Connections

1. If you haven’t done so, connect the USB cable from the MSP430 Launch Pad to your PC.

2. If you haven't done so, connect the TDC7201EVM to the MSP430 Launch Pad via J1 and J2 as shown in Figure 6.

3. Setting the Dual Channel Function Generator:

i. Set channel 1 of the dual function generator to the following (see Figure 5):

i. Pulse 1-Cycle ii. Burst mode iii. Freq = 40 kHz iv. Delay = 0 s v. Amplitude = 3.3 Vpp vi. Offset = 1.65 V vii. Duty = 20% viii. Burst Trigger Source = External

ii. Set channel 2 of the dual function generator to the following (see Figure 5):

i. Pulse 1-Cycle ii. Burst mode iii. Freq = 40 kHz iv. Delay = 19 µs --> this is the time-of-flight (TOF) v. Amplitude = 3.3 Vpp vi. Offset = 1.65 V vii. Duty = 20% viii. Burst Trigger Source = External

Hardware Configuration

Figure 5. START and STOP Signals Scope Shot

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TDC7201-ZAX-EVM

Hardware Configuration

4. Connecting the Input Signal:

a. Using a USB-to-SMA cable, connect channel 1 of the dual function generator to TDC7201EVM’s

START1_EXT connector (J5).

b. Using a USB-to-SMA cable, connect channel 2 of the dual function generator to TDC7201EVM’s

STOP1_EXT connector (J4). See Figure 6.

5. Connecting the Trigger Input:

a. Connect DTG_TRIG (TP9) to the TRIGG input of the dual function generator. DTG_TRIG is

generated by the MCU whenever a new measurement is started by the TDC7201. See Figure 6 and Figure 7.

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Figure 6. TDC7201EVM Connection Setup

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Hardware Configuration

Figure 7. Tektronix AFG3102 Connections

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Hardware Configuration

5.2 Jumpers

The following shows the jumper connection:

1. JP1: Jumper for VCC power

a. Connect Pin 1 to Pin 2 – power VCC via MSP430 (recommended) b. Open Pin 1 and Pin 2 – no connection to VCC via MSP430; need to apply external power

2. JP2: Jumper for CLOCK source

a. Connect Pin 1 to Pin 2 – power VCC via MSP430 (recommended) b. Open Pin 1 and Pin 2 – no connection to VCC via MSP430; need to apply external power

6 GUI and Operation

1. If you haven’t done so, open the TDC720xEVM GUI. The EVM GUI software can be run by clicking on Start, then clicking All Programs, Texas Instruments, and TDC720xEVM and selecting TDC720xEVM.

2. Click on the TDC720x tab and make sure TDC1 is selected with the register configuration in Figure 8:

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TDC7201-ZAX-EVM

Figure 8. Recommended TDC7201:TDC1 Register Configuration

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3. Click on the Graph tab, then click on START GRAPH. You should be able to read 19 µs (assuming

4. Calculating Time-of-Flight:

GUI and Operation

you follow the instructions as specified in Section 5.1).

Figure 9. Graphing

a. In the GUI, click on the TOF_ONE_SHOT tab. b. You should be able to see similar measurement results register values as shown in Figure 10

(assuming you follow the instructions as specified in Section 5.1).

c. To calculate the time-of-flight, use the Measurement Mode 2 Time-of-Flight calculation as shown in

Equation 1. For more information, refer to the TDC7201 data sheet (SNAS686).

d. Use the values reported in the Measurement Result Registers (Figure 10) to validate the time-of-

flight as approximately 19 µs (assuming you follow the instructions as specified in Section 5.1).

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Figure 10. Measurement Results

TDC7201-ZAX-EVM

CALIBRATION2 CALIBRATION1 (4354 2179)

calCount 2175

(CALIBRATION2_PERIODS) 1 (2) 1 (CLOCKperiod) (1/ 8MHz)

normLSB 57.4ps

(calCount) 2175

TOF1 normLSB(TIME1 TIME2) (CLOCK_COUNT1)(CLOCKperiod) TOF1 (5.74 10



 

 

 )(1688 1667) (152)(1/ 8MHz)

TOF1 19.001us

 

n n n 1 n n 1 n

TOF (TIME1)(normLSB) offset (CLOCK _COUNT )(CLOCKperiod) (TIME )(normLSB) offset TOF normLSB(TIME1 TIME ) (CLOCK _COUNT )(CLOCKperiod)

(CLOCKperiod)

normLSB

(calCount)

CALIBRATION2 CA

calCount



   

ª º ª º

¬ ¼ ¬ ¼

 



LIBRATION1

(CALIBRATION2_PERIODS) 1

GUI and Operation

where

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• TOFn [second] = time-of-flight measurement from the START to the nth STOP

• normLSB [sec] = normalized LSB value from calibration

• TIME1 = time 1 measurement given by the TDC7201 register address 0x10

• TIME and 0x1A

• CLOCK_COUNTn = nth clock count values in register addresses 0x11, 0x13, 0x15, 0x17, and 0x19

• CLOCKperiod [sec] = external CLOCK period

• offset [sec]= constant measurement offset

• CALIBRATION1 [count] = TDC count for first calibration cycle, located in register address 0x1B

• CALIBRATION2 [count] = TDC count for second calibration cycle, located in register address 0x1C

• CALIBRATION2_PERIODS = calibration count bits, located in register address 0x01 (1)

= (n+1) time measurement given by the TDC7201 register addresses 0x12, 0x14, 0x16, 0x18,

n+1

5. START_EXT2/STOP_EXT2 Testing a. Modification to Input Signal Connections:

1. Disconnect USB-to-SMA cable connection to START_EXT1 (J5). Instead, reconnect channel 1 of the dual function generator to TDC7201EVM’s START_EXT2 connector (J8).

2. Disconnect USB-to-SMA cable connection to STOP_EXT1 (J4). Instead, reconnect channel 2 of the dual function generator to TDC7201EVM’s STOP_EXT2 connector (J7). See Figure 4.

b. Now repeat steps 1 through 4 from Section 6 with the following modification to step 2: Click on the

TDC720x tab and make sure the TDC7201: Select TDCx field is as shown in Figure 11.

TDC7201-ZAX-EVM

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GUI and Operation

Figure 11. Recommended TDC7201:TDC2 Register Configuration

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Board Layout

7 Board Layout

NOTE: The board layout is not to scale. Figure 12 thru Figure 15 are intended to show how the board is

laid out; it is not intended to be used for manufacturing.

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TDC7201-ZAX-EVM

Figure 12. TDC7201EVM Top Layer

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Board Layout

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Figure 13. TDC7201EVM Bottom Layer

TDC7201-ZAX-EVM

Board Layout

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TDC7201-ZAX-EVM

Figure 14. TDC7201EVM Ground Plane

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TDC7201EVM Schematic

8 TDC7201EVM Schematic

The TDC7201EVM Schematic is shown in Figure 16.

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Figure 15. TDC7201EVM Power Plane

TDC7201-ZAX-EVM

START_EXT1

STOP_EXT1

GND

TRIG1

OSC_ENABLE

VCC

GND

VCC

SH-JP1

GND GND

INT1

DOUT1

DIN

CS1

SCLK

GND

TRIG1

CS1

ENABLE1

TP1

TP2

234

142-0701-801

234

142-0701-801

234

142-0701-801

OSC_ENABLE

10µF

1µF

GND

0.01µF

8MHz

VDD

OE/STANDBY

GND

OUT

VCC

GND

TP7

TP8

234

142-0701-801

234

142-0701-801

0.1µFC60.01µF

1µF

TP6

VCC

CS2

INT2

START_EXT2

STOP_EXT2

INT2

CS2 TRIG2

TP9

DTG_TRIG MSP_START

234

R11

R12

GND

SH-JP3

DTG_TRIG

MSP_START

GND

234

TP10

GND

1 3 56

7 910

12 11 14 13 16 15 18 17 20 19

PPPC102LFBN-RC

1 2

JP1

ICC

1 2

JP3

ICC

TP4 TP5

1 3 56

7 910

12 11 14 13 16 15 18 17 20 19

PPPC102LFBN-RC

GND

INT1

VCC

10.0k

R10

10.0k

49.9

R13

TP3

TRIG2

VREG1

VREG2

VDD2VDD1

VDD1 VDD2

ENABLE1

CLOCK_TDC_CAL

SCLK

DIN

START_EXT1

STOP_EXT1

START_EXT2

STOP_EXT2

0.1µFC20.01µF

GND

SCLK

OSC_OUT

CLOCK_TDC_CAL

R18

EXT_CLOCK

R17

R16

R15 0

R14

DIN

DOUT2

DOUT1

DOUT2

NOTE: 1.Add via on each SPI pins and label

2. Take all SPI bus and digital pins to Bottom Layer

3. START1, START2,STOP1, STOP2 must be symmetic and equal

from device's pin

4. Add J3 vertical narrowSMA between START1 and START2

5. Distance J3 must be the samefor START1 andSTART2

GND

TP13

GND

TP14

CLOCK

CSB1

CSB2

DIN

DOUT1

DOUT2

ENABLE

GND1

GND2

INTB1

INTB2

SCLK

START1

START2

STOP1

STOP2

TRIGG1

TRIGG2

VDD1

VDD2

VREG1

VREG2

TDC7201ZAXR

GND

SV601269 A

PCB Number:

PCB Rev:

Assembly Note

ZZ1

Short SH-JP1 and SH-JP3 on JP1 pin 1-2 and JP3 pin 1-2

FID2FID1 FID3

LOGO

PCB

FCC disclaimer

FID5FID4 FID6

LOGO

PCB

Logo1

LOGO

PCB

Logo2

TDC7201EVM Schematic

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TDC7201-ZAX-EVM

Figure 16. TDC7201EVM Schematic

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9 Bill of Materials

Bill of Materials

Table 1. TDC7201EVM Bill of Materials

Designator Qty Value Description Package

C1 1 10uF CAP, CERM, 10 µF, 6.3 V, +/- 20%,

C2, C6 2 0.1uF CAP, CERM, 0.1 µF, 16 V, +/- 5%,

C3, C5, C7 3 0.01uF CAP, CERM, 0.01 µF, 100 V, +/- 5%,

C4, C8 2 1uF CAP, CERM, 1 µF, 16 V, +/- 10%,

J1, J2 2 Receptacle, 100mil, 10x2, Gold, TH 10x2 Receptacle PPPC102LFBN-RCSullins

J3 1 Connector, TH, SMA SMA 142-0701-201 Emerson

J4, J5, J6, J7, J8 5 Connector, End launch SMA, 50

JP1, JP3 2 Header, 100mil, 2x1, Gold, TH 2x1 Header TSW-102-07-G-SSamtec

R1, R2, R8, R9, R13

R3, R4, R10, R16, R18

R5, R6 2 10.0k RES, 10.0 k, 1%, 0.1 W, 0603 0603 CRCW060310K

SH-JP1, SH-JP3 2 1x2 Shunt, 100mil, Gold plated, Black Shunt 969102-0000-DA 3M TP4, TP5, TP13,

TP14

TP9 1 Header, 100mil, 1pos, Gold, TH Testpoint TSW-101-07-G-SSamtec

5 49.9 RES, 49.9, 1%, 0.1 W, 0603 0603 CRCW060349R

5 0 RES, 0, 5%, 0.1 W, 0603 0603 CRCW06030000

4 Black Test Point, Multipurpose, Black, TH Black

X5R, 0603

X7R, 0603

ohm, SMT

Reference

0603 C0603C106M9P

0603 0603YC104JAT2AAVX

0603 06031C103JAT2AAVX

0603 EMK107B7105K

End Launch SMA

Multipurpose Testpoint

Part Number Manufacturer

Kemet

ACTU

Taiyo Yuden

A-T

Connector Solutions

Network Power

142-0701-801 Johnson

Vishay-Dale

9FKEA

Vishay-Dale

Z0EA

Vishay-Dale

0FKEA

5011 Keystone

U1 1 Time-to-Digital Converter for Time-

Y1 1 OSC, 8MHz, 15pF, SMD OSC,

FID1, FID2, FID3, FID4, FID5, FID6

R7, R11, R12, R14, R15, R17

TP1, TP2, TP3, TP6, TP7, TP8

TP10 0 Connector, TH, SMA SMA 142-0701-201 Emerson

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0 Fiducial mark. There is nothing to

0 0 RES, 0, 5%, 0.1 W, 0603 0603 CRCW06030000

0 Header, 100mil, 1pos, Gold, TH Testpoint TSW-101-07-G-SSamtec

of-FlightApplications in LIDAR,

ZAX0025A TDC7201ZAXR Texas

Magnetostrictive andFlowMeters, ZAX0025A

3.2x.85x5mm N/A N/A N/A

buy or mount.

ASFLMB-

8.000MHZ-LY-T

Z0EA

TDC7201-ZAX-EVM

Instruments

Abracon Corporation

Vishay-Dale

Network Power

Revision History

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Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Original (May 2016) to A Revision ........................................................................................................... Page

• Changed link to Gui....................................................................................................................... 3

• Changed link to Gui....................................................................................................................... 4

Revision History

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Texas Instruments: TDC7201-ZAX-EVM

Texas Instruments TDC7201-ZAX-EVM User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TDC7201-ZAX-EVM

1 General Description

1.1 TDC7201EVM Key Features

1.2 TDC7201EVM

2 Equipment List

3 Quick Start

4 Software Installation

4.1 Installing the TDC720xEVM GUI

4.2 MSP430 Firmware Upgrade (This is only needed for a new Launchpad.)

4.3 Checking Connection

4.4 Opening the GUI

5 Hardware Configuration

5.1 TDC7201EVM Connections

5.2 Jumpers

6 GUI and Operation

7 Board Layout

8 TDC7201EVM Schematic

9 Bill of Materials

Revision History