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.
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3
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5
6
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9
Contents
General Description ......................................................................................................... 1
Equipment List ............................................................................................................... 3
Quick Start .................................................................................................................... 3
Software Installation ......................................................................................................... 4
Hardware Configuration ..................................................................................................... 7
GUI and Operation ......................................................................................................... 10
Board Layout ................................................................................................................ 14
TDC7201EVM Schematic ................................................................................................. 17
Bill of Materials ............................................................................................................. 19
Trademarks
1
General Description
1.1
TDC7201EVM Key Features
1.
2.
3.
4.
5.
Evaluate TDC7201 Time-to-Digital Converter
Connects with MSP430 Launch Pad (MSP-EXP430F5529LP)
User-friendly TDC720xEVM GUI interface
Connection for START1, START2, STOP1, and STOP2 inputs
Powered by MSP430 LaunchPad (no external power needed)
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General Description
1.2
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TDC7201EVM
Figure 1. TDC7201EVM Evaluation Board
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Equipment List
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2
Equipment List
1.
2.
3.
4.
5.
6.
7.
3
TDC7201EVM
TDC720xEVM GUI (http://www.ti.com/tool/tdc7201-zax-evm)
MSP430 launchpad (http://www.ti.com/tool/msp-exp430f5529lp)
Micro-USB cable
Dual function generator (for example: Tektronix AFG3102 1GS/s, 100MHz)
PC with Windows XP or Windows 7
4 BNC-to-SMA cables
Quick Start
1.
2.
3.
4.
Download and Install TDC720xEVM (GUI) Software. See Section 4 for more information.
Connect the USB cable from the MSP430 LaunchPad to the PC.
Connect the TDC7201EVM to the MSP430 LaunchPad via J1 and J2.
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.
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Software Installation
4
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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.
2.
3.
4.
5.
6.
7.
8.
Open the TDC720xEVM GUI.
Click on the Debug tab.
Click on Update Firmware.
Click Next to proceed on the first prompt; read and accept the license agreement, and click Next to
continue.
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.
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.
On the MSP430 USB Firmware Upgrade GUI, click Upgrade Firmware.
Click Close when done.
Figure 2. Upgrading MSP430 Firmware
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Software Installation
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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.
Figure 3. Device Manager
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Software Installation
4.4
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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.
Figure 4. TDC720xEVM GUI
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Hardware Configuration
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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
Figure 5. START and STOP Signals Scope Shot
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Hardware Configuration
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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.
Figure 6. TDC7201EVM Connection Setup
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Hardware Configuration
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Figure 7. Tektronix AFG3102 Connections
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Hardware Configuration
5.2
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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:
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
you follow the instructions as specified in Section 5.1).
Figure 9. Graphing
4. Calculating Time-of-Flight:
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).
Figure 10. Measurement Results
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-offlight as approximately 19 µs (assuming you follow the instructions as specified in Section 5.1).
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GUI and Operation
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TOFn
ª¬(TIME1)(normLSB) offset ¼º (CLOCK _ COUNTn )(CLOCKperiod) ¬ª(TIMEn 1)(normLSB) offset ¼º
normLSB(TIME1 TIMEn 1) (CLOCK _ COUNTn )(CLOCKperiod)
TOFn
normLSB
calCount
(CLOCKperiod)
(calCount)
CALIBRATION2 CALIBRATION1
(CALIBRATION2 _ PERIODS) 1
where
•
•
•
•
•
•
•
•
•
•
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
TIMEn+1 = (n+1) time measurement given by the TDC7201 register addresses 0x12, 0x14, 0x16, 0x18,
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)
CALIBRATION2 CALIBRATION1 (4354 2179)
2175
(CALIBRATION2 _ PERIODS) 1
(2) 1
(CLOCKperiod) (1/ 8MHz)
normLSB
57.4ps
(calCount)
2175
TOF1 normLSB(TIME1 TIME2) (CLOCK _ COUNT1)(CLOCKperiod)
calCount
TOF1 (5.74 10 11 )(1688 1667) (152)(1/ 8MHz)
TOF1 19.001us
(2)
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.
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Figure 11. Recommended TDC7201:TDC2 Register Configuration
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Board Layout
7
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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.
Figure 12. TDC7201EVM Top Layer
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Board Layout
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Figure 13. TDC7201EVM Bottom Layer
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Board Layout
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Figure 14. TDC7201EVM Ground Plane
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TDC7201EVM Schematic
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Figure 15. TDC7201EVM Power Plane
8
TDC7201EVM Schematic
The TDC7201EVM Schematic is shown in Figure 16.
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TDC7201EVM Schematic
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TP9
VCC
DIN
DOUT1
INT1
INT2
J1
1
3
5
7
9
11
13
15
17
19
ENABLE1
C1
10µF
TP10
1
GND
PPPC102LFBN-RC
OSC_ENABLE
TP1
R14
R15
0
0
PPPC102LFBN-RC
GND
VCC
VCC
JP1
DOUT2
DIN
JP3
1
2
SH-JP1
1
2
VDD1
C2
0.1µF
ICC
C3
SH-JP3
0.01µF
VDD2
C6
0.1µF
ICC
J4
1
C7
0.01µF
R1
49.9
5
4
3
2
SCLK
1
GND
2
4
6
8
10
12
14
16
18
20
MSP_START
1 DTG_TRIG
3 MSP_START
CS2
5
TRIG2
7
9
11
SCLK
13 R7
15 0
17
19
2
4
6
8
10
12
14
16
18
20
5
4
3
2
TRIG1
CS1
DTG_TRIG
1
GND
J2
142-0701-801
STOP_EXT1
START_EXT1
GND
C4
GND
VREG1
GND
U1
J5
INTB1
INTB2
A2
D2
TRIGG1
TRIGG2
B2
E2
A3
R4
CLOCK
C1CLOCK_TDC_CAL
SCLK
DIN
CSB1
DOUT1
CSB2
DOUT2
A5
D5
B5
C5
E5
E3
START1
START2
A1
D1
STOP1
STOP2
B1
E1
R2
49.9
ENABLE1
0
TP6
C2
C3
D4
ENABLE
NC
NC
NC
GND1
GND2
5
4
3
2
B3
D3
1
142-0701-801
R11
0
TP2
GND
SCLK
DIN
CS1
DOUT1
R16
0
CS2
TP7
DOUT2
START_EXT1
START_EXT2
J7
1
R8
49.9
STOP_EXT1
STOP_EXT2
142-0701-801
STOP_EXT2
J3
START_EXT2
TDC7201ZAXR
1
GND
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 narrow SMA between START1 and START2
5. Distance J3 must be the same for START1 and START2
R13
49.9
GND
J8
5
4
3
2
TP3
1µF
R5
INT1
R610.0k INT2
10.0k
1 TRIG1
R3
R10
0
1 TRIG2
0
VDD1
VDD2
VDD1
VDD2
1
1
R9
49.9
5
4
3
2
VCC VCC
GND
VREG1
VREG2
B4
C4
5
4
3
2
VREG2
A4
E4
1
GND
C8
1
1µF
142-0701-801
GND
VCC
TP4
TP5
TP13
TP14
J6
1
2
3
4
5
142-0701-801
GND
GND
GND
EXT_CLOCK
R17
R18
0
0
GND
Y1
OSC_OUT
3
2
GND
OUT
GND
8MHz
VDD
OE/STANDBY
PCB Number: SV601269
PCB Rev: A
R12
0
TP8
CLOCK_TDC_CAL
4
1 OSC_ENABLE
PCB
LOGO
PCB
LOGO
PCB
LOGO
Logo1
Logo2
FCC disclaimer
C5
0.01µF
GND
GND
GND
ZZ1
Assembly Note
Short SH-JP1 and SH-JP3 on JP1 pin 1-2 and JP3 pin 1-2
FID1
FID2
FID3
FID4
FID5
FID6
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Figure 16. TDC7201EVM Schematic
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Bill of Materials
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9
Bill of Materials
Table 1. TDC7201EVM Bill of Materials
Designator
Qty
Value
Description
Package
Reference
Part Number
Manufacturer
C1
1
10uF
CAP, CERM, 10 µF, 6.3 V, +/- 20%,
X5R, 0603
0603
C0603C106M9P Kemet
ACTU
C2, C6
2
0.1uF
CAP, CERM, 0.1 µF, 16 V, +/- 5%,
X7R, 0603
0603
0603YC104JAT2 AVX
A
C3, C5, C7
3
0.01uF
CAP, CERM, 0.01 µF, 100 V, +/- 5%, 0603
X7R, 0603
06031C103JAT2 AVX
A
C4, C8
2
1uF
CAP, CERM, 1 µF, 16 V, +/- 10%,
X7R, 0603
0603
EMK107B7105K Taiyo Yuden
A-T
J1, J2
2
Receptacle, 100mil, 10x2, Gold, TH
10x2 Receptacle PPPC102LFBNRC
Sullins
Connector
Solutions
J3
1
Connector, TH, SMA
SMA
142-0701-201
Emerson
Network Power
J4, J5, J6, J7, J8 5
Connector, End launch SMA, 50
ohm, SMT
End Launch
SMA
142-0701-801
Johnson
JP1, JP3
2
Header, 100mil, 2x1, Gold, TH
2x1 Header
TSW-102-07-GS
Samtec
R1, R2, R8, R9,
R13
5
49.9
RES, 49.9, 1%, 0.1 W, 0603
0603
CRCW060349R
9FKEA
Vishay-Dale
R3, R4, R10,
R16, R18
5
0
RES, 0, 5%, 0.1 W, 0603
0603
CRCW06030000 Vishay-Dale
Z0EA
R5, R6
2
10.0k
RES, 10.0 k, 1%, 0.1 W, 0603
0603
CRCW060310K
0FKEA
SH-JP1, SH-JP3 2
1x2
Shunt, 100mil, Gold plated, Black
Shunt
969102-0000-DA 3M
TP4, TP5, TP13, 4
TP14
Black
Test Point, Multipurpose, Black, TH
Black
Multipurpose
Testpoint
5011
Keystone
Vishay-Dale
TP9
1
Header, 100mil, 1pos, Gold, TH
Testpoint
TSW-101-07-GS
Samtec
U1
1
Time-to-Digital Converter for Timeof-FlightApplications in LIDAR,
Magnetostrictive andFlowMeters,
ZAX0025A
ZAX0025A
TDC7201ZAXR
Texas
Instruments
Y1
1
OSC, 8MHz, 15pF, SMD
OSC,
3.2x.85x5mm
ASFLMB8.000MHZ-LY-T
Abracon
Corporation
FID1, FID2,
FID3, FID4,
FID5, FID6
0
Fiducial mark. There is nothing to
buy or mount.
N/A
N/A
N/A
R7, R11, R12,
R14, R15, R17
0
RES, 0, 5%, 0.1 W, 0603
0603
CRCW06030000 Vishay-Dale
Z0EA
TP1, TP2, TP3,
TP6, TP7, TP8
0
Header, 100mil, 1pos, Gold, TH
Testpoint
TSW-101-07-GS
Samtec
TP10
0
Connector, TH, SMA
SMA
142-0701-201
Emerson
Network Power
0
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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
•
•
20
Changed link to Gui ....................................................................................................................... 3
Changed link to Gui ....................................................................................................................... 4
Revision History
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