Linear Technology LT3669-2 User manual

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DEMO MANUAL DC2227A
Description
LT3669-2
IO-Link Device with Multiple Sensors
Demonstration circuit 2227A is a complete IO-Link
®
de-
vice built using the LT
®
3669-2 to implement an IO-Link
v1.1 physical interface (PHY). The IO-Link stack protocol
runsonanAtmelATmegamicrocontrollerwhichconnects
to LT3669-2’s logic IO-signals to communicate with an
IO-Link master via the CQ1 transceiver.
An LTC2997 temperature sensor, an opto-coupler (light
barrier) and a pushbutton demonstrate IO-Link device
functionality and master-slave interoperability.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. IO-Link is a registered trademark of PROFIBUS User Organization
(PNO). All other trademarks are the property of their respective owners.
performance summary
BoarD photo
A28V/100mA light bulb connected to LT3669-2’s second
driver (Q2) demonstrates its high current driving capabili-
ties. All low voltage circuitry is supplied by the LT3669-2’s
integrated buck and LDO for high efficiency.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2227A
Specifications are at TA= 25°C, VL+ = 24V
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
L+ Input Supply 18 36 V
VBUCK LT3669-2's Buck Output Voltage 3.8 4 4.2 V
VLDO LT3669-2's LDO Output Voltage 3.135 3.3 3.465 V

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DEMO MANUAL DC2227A
Quick start proceDure
Additional Hardware and Software Requirements
To operate the DC2227A demo circuit in IO-Link mode,
additional hardware and software are required:
• PC running Windows XP or later with Ethernet Card.
AlternativelyaUSB-to-Ethernetadaptorcanalsobeused
• LTC IO-Link Master Demo Circuit DC2228A
• DC2228A Control Tool Software
• PoE Injector or 24V Power Supply
• DC2227A IODD Files (COM2 and COM3)
Set-up Preparation (See Figures 1 and 2)
1. Download and install the DC2228A Control Tool soft-
ware from:
www.linear.com/demo/DC2228A
2. Connect the DC2228A to power and the host com-
puter.Refertothe DC2228Ademomanualfordetailed
information about the different configuration options
to supply the DC2228A and interface it to the PC.
3. Using a 3-wire IO-Link cable of up to 20m in length
with M12 connectors, plug the male terminal to one
of the 8-ports of the DC2228A (for example port 2 like
in Figure 1) and the female terminal to the DC2227A.
4. Run the DC2228A Control Tool on the PC and connect
to the DC2228A. See the DC2228A demo manual for
detailed information of how to select the DC2228A as
the master, configure the IP parameters and establish
communication between the host computer and the
master.
Operation in IO-Link Mode (See Figures 1 and 2)
5. Download the DC2227A IODD files from:
www.linear.com/demo/DC2227A
6. Click on the “Select Device” button and import the
IODD files by selecting the downloaded xml files and
then clicking on the “Import” button (one at a time).
Operation in COM2
7. Click on the “Select Device” button again, this time
making sure the correct port is selected. Use the fol-
lowing IODD file:
TEConcept_GmbH-65538-<YYYYMMDD>-IODD1.1.xml
8. If the device is off, switch it on, enabling the L+ sup-
ply of the connected master’s port by pressing the
“Power ON” button keeping the light barrier open
duringpower-up.Ifthedevicewasalreadypoweredon
coming from COM3 mode, power cycle it keeping the
light barrier open to restart the device in COM2 mode.
See the Light Barrier section for more information.
9. StartIO-Linkcommunicationbypressingthe“IO-Link”
button. The “Min. Cycle Time” is set to 20ms.
10. If a different IODD file is to be selected, stop IO-Link
communicationfirst by pressing the“Inactive”button
to revert the DC2227A into SIO mode.
Operation in COM3
11. Click on the “Select Device” button again making sure
the correct port is selected. Use the following IODD
file:
TEConcept_GmbH-65539-<YYYYMMDD>-IODD1.1.xml
12. If the device is off, switch it on, enabling the L+ sup-
ply of the connected master’s port by pressing the
“Power ON” button keeping the light barrier closed
duringpower-up.Ifthedevicewasalreadypoweredon
coming from COM2 mode, power cycle it keeping the
lightbarrierclosedtorestartthedeviceinCOM3mode.
See the Light Barrier section for more information.
13. StartIO-Linkcommunicationbypressingthe“IO-Link”
button. The “Min. Cycle time” is set to 800µs.
14. If a different IODD file is to be selected, stop IO-Link
communicationfirst by pressing the“Inactive”button
to revert the DC2227A in SIO mode.

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DEMO MANUAL DC2227A
Quick start proceDure
Figure 1. Recommended Set-up for Operating DC2227A in IO-Link Mode
Figure 2. Control Tool for Connecting DC2227A to DC2228A

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DEMO MANUAL DC2227A
aDDitional information
Operation in SIO Mode
The device can also operate in SIO mode. In this mode,
no IO-Link communication takes place either because the
master connected to the device is in the “Inactive” mode
and it only supplies power to the device, or because there
is no master connected to the device in which case the
device is powered by a 24V supply. In SIO mode, the
DC2227Areactsto thestatus ofthelight barrieras follows:
• If the light barrier is open, then drivers CQ1 and Q2
actively pull low. Since the onboard light bulb is con-
nected between Q2 and ground, it is therefore turned
off.
• If the light barrier is closed (by placing a piece of paper
in its gap), CQ1 and Q2 actively pull high and the light
bulb attached to Q2 turns on.
Temperature Sensor Configurations
In IO-Link mode, the DC2227A reports cyclically to the
master (and thus to the PC Control Tool) the temperature
measured by the on-board LTC2997. In order to measure
temperature the LTC2997 uses an NPN configured as a
diode. The NPN can be either on-chip, on PCB (Q1) or
remote. Refer to the Connectors and Jumpers section for
detailed information on how to choose the NPN.
Microcontroller ADC’s Offset Correction
The 12-bit ADC of the Atmel microcontroller samples
both, the precise 1.8V reference voltage (VREF) and the
VPTAT outputs of the LTC2997 to report the temperature
in Celsius to the IO-Link master. The temperature is then
calculated using a ratiometric measurement. The µC’s
ADC is specified to have offsets from –40 to 40 LSBs.
The temperature equation is:
100•T(°C)=
ADC7 –OFFSET
ADC4– OFFSET
•45000 – 27315
ADC7 is the ADC’s code for the VPTAT output and ADC4
the code for the precise 1.8V VREF. OFFSET is the ADC’s
offset (in LSB) parameter that can be set using the control
tool (default is 0 LSB). In order to improve the accuracy
of the temperature reading, a calibrated thermometer can
be used to measure the temperature close to the LTC2997
and then the ADC Offset parameter can be set to the value
(after several tries) that minimizes the error between the
temperature reported by the Control Tool and that given
by the calibrated thermometer.
Event Generator
The DC2227A is also equipped with a pushbutton to
simulate events generated by IO-Link devices to inform
IO-Link masters of requests that require special attention.
Light barrier
The light barrier offers many ways to interact with the
device. It starts the device in COM3 mode if it is closed
during power-up or in COM2 mode if left open. In IO-Link
mode, its status is reported live on the PC control tool and
in SIO mode its status is directly coupled to the CQ1 and
Q2 drivers, thus allowing the user to operate the light bulb.
Light bulb
A28V/100mA light bulb connects between Q2 and ground
and serves to show the high current driving capability of
the line drivers. It takes about 240ms to be turned on fully
bythepulsingmechanismoftheLT3669-2.To preventdata
loss in IO-Link mode, driver Q2 is only enabled in between
IO-Link telegrams. To turn it on and off from the control
tool (in COM2 only) simply press the “Turn On” and “Turn
Off” buttons within the light bulb section. In SIO mode,
regardless on the IODD file chosen, the light bulb can be
switched on and off by interacting with the light barrier.

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DEMO MANUAL DC2227A
aDDitional information
Connectors and Jumpers
The board has the following connectors:
Table 1. Connectors and Jumpers Overview
Name Type Form Comment
J1 Jumper Pin-2 Atmel µC Flash Erase
J2 Connector M12 IO-Link Signals (L+, L–, CQ1, Q2)
J3 Jumper Pin-2 LT3669-2 EN/UVLO Pin
J4 Header 8 ×2_2mm Eval Board DC1733
J5 Connector Pin-6 SPI Interface
J6 Jumper Pin-4 Sensor Selection
J7 JTAG Header10 ×2 JTAG Programming
J8 Jumper Pin-3 VDD3 Select
J9 Jumper Pin-3 Reset Select
Jumper J1
Jumper J1 sets the Erase/PB12 pin of the microcontroller
to VDD3 (3.3V). By default the J1 header is not populated.
FordetailsabouttheErase/PB12pinseetheATSAM31S2AA
microcontroller data sheet.
Connector J2
Connector J2 is a 5-pin M12 male connector. Plug a
standard industrial sensor cable to this connector to sup-
ply and communicate to the DC2227A using an IO-Link
master. Table 2 shows the internal pin assignments to the
LT3669-2 IO-Link PHY:
Table 2. Connector J2 Pinout
M12 Pin LT3669-2’s Pin Comment
1 L+ DC2227A Input Supply (24V)
2 Q2 LT3669-2 Second Driver
3 GND DC2227A Ground Node
4 CQ1 LT3669-2 Transceiver (IO-Link)
5 Not Connected
Jumper J3
JumperJ3enables/disablestheonboardLT3669-2(which
also generates the internal 3.3V supply rail). Close this
jumper (default position) to use the onboard LT3669-2
as the IO-Link PHY (it will start up for L+ voltages above
14.8V). Leave this jumper open if the external DC1733A-B
board is used (via the J4 connector) as the IO-Link PHY
instead.
Connector J4
J4 is for connecting an external DC1733A-B demo circuit
bypassingtheon-boardLT3669-2.Thisconnectionallows
access to more signals from LT3669-2. Connect jumper
J3 from DC1733A-B pin-to-pin to jumper J4 on this board.
Table 3 identifies each pin.
Table 3. Connector J4 Pinout
Pin Function Comment
1 TXD2 DC1733A-B Driver Input (Q2)
2 TXEN2 DC1733A-B Driver Input (Q2)
3 TXD1 DC1733A-B Driver Input (CQ1)
4 TXEN1 DC1733A-B Driver Input (CQ1)
5 RXD1 DC1733A-B Receiver Output (CQ1)
6 GND DC1733A-B Ground
7 WAKEn DC1733A-B Wake-Up Output
8 GND DC1733A-B Ground
9 SC2n DC1733A-B Driver Short Circuit Output (Q2)
10 SC1n DC1733A-B Driver Short Circuit Output (CQ1)
11 GND DC1733A-B Ground
12 RST_n DC1733A-B POR Reset Output
13 VDD(EXT) DC1733A-B LDO’s Output (3.3V)
14 GND DC1733A-B Ground
15 TP33 DC1733A-B Buck Output (5V)
16 SYNC DC1733A-B Buck Oscillator Synchronization Input

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DEMO MANUAL DC2227A
Connector J5
J5iscurrentlyunusedandmaybehelpfulforthecustomer’s
own applications that make use of the SPI interface of the
Atmel microcontroller.
Table 4. Connector J5 SPI Pinout
Pin Function Comment
1 MISO Master In Slave Out
2 MOSI Master Out Slave In
3 SPCK SPI Clock
4 RESETn Reset
5 VDD3 Power
6 GND Ground
Jumper J6
J6 configures the sense device used by the LTC2997 to
measure temperature. It could be either the LTC2997’s
internal diode, the on-board diode-connected NPN Q1 or
a remote NPN (connected as a diode) using a twisted pair:
Table 5. Jumper J6 Pinout (Temperature Sense Device)
Pin Description Comment
1 LTC2997’s VCC Close 1-2 to Use the LTC2997’s Int. NPN
2 LTC2997’s D+ To Base/Collector of Remote NPN
3 Q1’s Base/Collector Close 2-3 to Use the On-board NPN Q1
4 LTC2997’s D– To Emitter of Remote NPN
Connector J7
Standard20-pinJTAGprogramming/debugginginterface.
This interface fits many JTAG/ICE connectors.
Table 6. JTAG Connector Pinout
Pin Function Comment
1, 2 VDD3
3 VDD3 Via 100k
5 TDI
7 TMS
9, 11 TCK
13 TDO
15 RESETn
17, 19 N.C.
6, 8, 10, 12, 14, 16, 18, 20 GND
aDDitional information
Jumper J8
J8 selects the source for the VDD3 power.
Table 7. VDD3 Source Select Pinout
Pin Description Comment
1 DC1733A-B’s LDO Close 1-2 to Use DC1733A-B as PHY
2 Local VDD3 rail Default: Connected to Pin 3
3 Local LT3669-2’s LDO Close 2-3 to Use Local LT3669-2 as PHY
Jumper J9
J9 selects the source for the microcontroller’s reset pin.
Table 8. Reset Source Select Pinout
Pin Description Comment
1 DC1733A-B RSTn Close 1-2 to use DC1733A-B as PHY
2 Local RESETn Default: Connected to Pin 3
3 Local LT3669-2 RSTn Close 2-3 to Use Local LT3669-2 as PHY
Indicators
The following indicators are available:
Table 9. Indicators
Name Comment
LED1 ON (Green) if Device Is Powered up
LED2 ON (Red) if µC Started Successfully
LED3 ON (Red) if Device Is in IO-Link Mode
LP1 28V/100mA Light Bulb Between Q2 and GND
TVS Protection
The CQ1, Q2 and L+ pins are protected by 39V TVS diodes.
Do not connect to any voltage higher than 36V.
Data Storage
Data Storage is not currently supported by DC2227A. Do
not use pushbutton "DS upload" in Control Tool Software.
IO-Link Firmware
The firmware contained in the Atmel microcontroller
is intellectual property owned by TEConcept GmbH in
Germany. Any attempt to copy, transfer, or reverse en-
gineer the firmware is forbidden. The source code or an
object library for the IO-Link stack can be licensed from
TEConcept.

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aDDitional information
IO Device Description
IODD File (COM2): TEConcept_GmbH-65538-<YYYYMMDD>-IODD1.1
Release Date: <YYYY-MM-DD>
Document Version: V1.0
Device ID: 65538
Bit Rate: COM2
IO-Link Version: 1.1
MinCycleTime: 20ms
IODD File (COM3): TEConcept_GmbH-65539-<YYYYMMDD>-IODD1.1
Release Date: <YYYY-MM-DD>
Document Version: V1.0
Device ID: 65539
Bit Rate: COM3
IO-Link Version: 1.1
MinCycleTime: 800µs
Device Basic Data:
SIO Mode Supported: Yes
Device: LTC DC2227A
Vendor ID: 646
Vendor Name: TEConcept GmbH
Vendor Text: www.teconcept.de/www.linear.com
Description: TEConcept-LTC IO-Link DemoDeviceBoard V1.2
Process Data
Name Description Datatype Bit Offset Bit Length Value Range Gradient Offset Unit
Optogatestate State of Light Barrier Boolean 15 1 0 to 1
Temperature Temperature Measured
Using the LTC2997
IntegerT 0 15 –32768 to 32767 0.1 0 °C
Events
Code Name Type Mode Description
30480 Demo/Test Error Error Event Single Shot This Event Is Issued When the Demo Board Button Has Been Pressed.
Also Used During the Conformance Tests

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aDDitional information
Variables
Name Description Index Subindex Datatype Length Access Rights Default Value Range Unit
System Command Command Code
Definition 2 00 UIntegerT 8 Bit wo
Device Access
Locks Standardized Device Locking Functions 12 00 RecordT 1 Bit rw -
Parameter (Write)
Access Lock Parameter Write Access 12 01 BooleanT 1 Bit rw 0 0 or 1
Data Storage Lock Data Storage 12 02 BooleanT 1 Bit rw 0 0 or 1
Local
Parameterization
Lock
Local parameterization 12 03 BooleanT 1 Bit rw 0 0 or 1
Local User
Interface Lock Local User Interface Operation 12 04 BooleanT 1 Bit rw 0 0 or 1
Vendor Name Informative 16 00 StringT Max. 64 Byte ro TEConcept GmbH
Vendor Text Additional Vendor
Information 17 00 StringT Max. 64 Byte ro www.teconcept.de www.linear.com -
Product Name Detailed Product or
Type Name 18 00 StringT Max. 64 Byte ro LTC DC2227A -
Product ID Product or type
identification 19 00 StringT Max. 64 Byte ro TEC-LTC DC2227A -
Product Text Description of
Device function or
Characteristic
20 00 StringT Max. 64 Byte ro TEC-LTC IO-Link
DC2227A -
Serial Number Vendor Specific SN 21 00 StringT Max. 16 Byte ro -
Hardware Version Vendor Specific Format 22 00 StringT Max. 64 Byte ro 2.0 -
Firmware Version Vendor Specific Format 23 00 StringT Max. 64 Byte ro 1.2.5 -
Application
Specific Tag Tag location or Tag Function Defined by
User
24 00 StringT Max. 32 Byte rw Testing*********…
Error Count Errors Since Power-
On or Reset 32 00 UIntegerT 16 Bit ro -
Light Bulb Light Bulb State 64 00 BooleanT 1 Bit rw 0 0 or 1
ADC Offset
(in LSB) ADC Offset (in LSB) 65 00 IntegerT 8 Bit rw 0 –128 to 127 LSB
SC1 Counter Short Circuit Counter
on CQ1 80 00 UIntegerT 16 Bit ro 0 0 to 65535
SC2 Counter Short Circuit Counter
on Q2 81 00 UIntegerT 16 Bit ro 0 0 to 65535
Overtemp Counter Counts
Overtemperature Events 82 00 UIntegerT 8 Bit ro 0 0 to 255
4mvK ADC Input Parameter
for Temperature
Measurement
(LTC2997’s VPTAT)
90 00 UIntegerT 12 Bit rw 0 0 to 4095 LSB
1V8 ADC Input Parameter
for Temperature
Measurement
(LTC2997’s VREF)
91 00 UIntegerT 12 Bit rw 0 0 to 4095 LSB

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parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 6 C1, C2, C3, C4, C14, C16 CAP, X5R, 100nF, 10%, 10V, 0603 AVX, 0603ZD104KAT2A
2 3 C5, C8, C9 CAP, X5R, 4.7µF, 10%, 10V, 0805 MURATA, GRM21BR71A475KA73L
3 2 C6, C7 CAP, NP0, 18pF, 10%, 25V, 0603 AVX, 06033A180KAT2A
4 5 C10, C11, C12, C13, C22 CAP, X5R, 1µF, 10%, 10V, 0603 MURATA, GRM188R61A105KA61D
5 1 C15 CAP, X7R, 220nF, 10%, 10V, 0603 AVX, 0603ZC223KAT2A
6 1 C18 CAP, X5R, 22µF, 10%, 10V, 1206 MURATA, GRM31CR61A226KE19L
7 2 C24, C25 CAP, NP0, 470pF, 10%, 100V, 0603 TDK, C1608C0G2A471K080AA
8 1 C26 CAP, X7R, 10µF, 10%, 50V, 1206 MURATA, GRM31CR61H106KA12L
9 1 C33 CAP, X7R, 10pF, 10%, 10V, 0603 AVX, 0603ZC100KAT2A
10 1 D1 DIODE, SCHOTTKY, POWERDI123 DIODES INC., DFLS160-7-F
11 4 D2, D3, D4, D5 DIODE, TVS, SMB_2C VISHAY, SM6T39A
12 1 L1 IND, 10µH, 0.2A, 0805 TAIYO YUDEN, CB2012T100MRV
13 1 L2 IND, 33µH, 1A, SMD 6 ×6 SUMIDA, CDRH50D28RNP-330MC
14 1 R3 RES, 41.2k, 1%, 1/10W, 0603 VISHAY, CRCW060341K2FKEA
15 1 R4 RES, 10.2k, 1%, 1/10W, 0603 VISHAY, CRCW060310K2FKEA
16 1 R6 RES, 38.3k, 1%, 1/10W, 0603 VISHAY, CRCW060338K3FKEA
17 2 R16, R17 RES, 100k, 1%, 1/10W, 0603 VISHAY, CRCW0603100KFKEA
18 1 R12 RES, 84.5k, 1%, 1/10W, 0603 VISHAY, CRCW060384K5FKEA
19 1 R18 RES, 14k, 1%, 1/10W, 0603 VISHAY, CRCW060314K0FKEA
20 1 R20 RES, 4.42k, 1%, 1/10W, 0603 VISHAY, CRCW06034K42FKEA
21 2 R22, R55 RES, 10k, 1%, 1/10W, 0603 VISHAY, CRCW060310K0FKEA
22 2 R42, R43 RES, 4.7k, 1%, 1/10W, 0603 VISHAY, CRCW06034K70FKEA
23 1 R49 RES, 47k, 1%, 1/10W, 0603 VISHAY, CRCW060347K0FKEA
24 1 U1 IC, INDUSTRIAL TRANSCEIVER LINEAR TECH, LT3669HUFD-2#PBF
25 1 U3 IC, MICROCONTROLLER, QFN48 ATMEL, ATSAM3S2AA-MU
26 1 Y1 CRYSTAL, 14.7456 MHz, HC-49 SMD RALTRON, AS-14.7456-18SMDT
Temperature Sensor Specific Components
1 2 C20, C23 CAP, X5R, 100nF, 10%, 10V, 0603 AVX, 0603ZD104KAT2A
2 2 C19, C31 CAP, X5R, 1µF, 10%, 10V, 0603 MURATA, GRM188R61A105KA61D
3 1 C30 CAP, X7R, 470pF, 10%, 10V, 0603 AVX, 0603ZC471KAT2A
4 1 Q1 XSTR, NPN, 40V, SOT23 Fairchild, MMBT3904
5 1 R10 RES, 1k, 1%, 1/10W, 0603 VISHAY, CRCW06031K00FKEA
6 3 R14, R40, R54 RES, 100Ω, 1%, 1/10W, 0603 VISHAY, CRCW0603100RFKEA
7 1 U4 IC, TEMPERATURE SENSOR LINEAR TECH., LTC2997HDCB#PBF
Light Barrier Specific Components
1 4 R50 RES, 4.7k, 1%, 1/10W, 0603 VISHAY, CRCW06034K70FKEA
2 1 R51 RES, 220Ω, 1%, 1/10W, 0603 VISHAY, CRCW0603220RFKEA
3 1 U302 XSTR, LIGHT SENSING SHARP, GP1S53VJ000F

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parts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Push-Buttom Specific Components
1 1 R53 RES, 4.7k, 1%, 1/10W, 0603 VISHAY, CRCW06034K70FKEA
2 1 SW1 SWITCH, PUSHBUTTON WÜRTH ELEKTRONIK, 430182050816
Additional Demo Board Circuit Components:
1 1 C21 CAP, X5R, 100nF, 10%, 10V, 0603 AVX, 0603ZD104KAT2A
2 0 C17 OPTIONAL
3 0 C27, C28, C29, C32 OPTIONAL
4 0 C100 OPTIONAL
5 0 D6 OPTIONAL
6 1 D7 DIODE, SOT23 DIODES INC., BAV199-7-F
7 0 D8 OPTIONAL
8 1 LED1 LED, 0603D VISHAY, VLMTG1300-GS08
9 2 LED2, LED3 LED, 0603D KINGBRIGHT, KPG-1608SURKC-T
10 18 R1, R11, R13, R15, R23, R24,
R25, R27, R28, R29, R30,
R31, R32, R33, R36, R37,
R38, R39
RES, 1k, 1%, 1/10W, 0603 VISHAY, CRCW06031K00FKEA
11 2 R2, R44 RES, 0Ω, 1%, 1/10W, 0603 VISHAY, CRCW06030000Z0EA
12 8 R7, R19, R45, R46, R47, R48 RES, 100k, 1%, 1/10W, 0603 VISHAY, CRCW0603100KFKEA
13 2 R21, R26 RES, 10k 1%, 1/10W, 0603 VISHAY, CRCW060310K0FKEA
14 2 R34, R35 RES, 1.8k, 1%, 1/10W, 0603 VISHAY, CRCW06031K80FKEA
15 1 R41 RES, 88.7k, 1%, 1/10W, 0603 VISHAY, CRCW060388K7FKEA
16 0 R52 OPTIONAL
17 0 U2 OPTIONAL
18 0 Y2 OPTIONAL
Hardware-For Demo Board Only:
1 0 J1 OPTIONAL
2 1 J3 HEADER, 1 ×2, 0.1" WÜRTH ELEKTRONIK, 61300211121
3 1 J2 CONNECTOR, M12, 5 PIN BINDER, 09-3441-500-05
4 1 J4 HEADER 2 ×8 2mm WÜRTH ELEKTRONIK, 62001621121
5 0 J5 OPTIONAL
6 1 J6 HEADER, 1 ×4, 0.1" WÜRTH ELEKTRONIK, 61300411121
7 1 J7 HEADER, 2 ×10, 0.1 " WÜRTH ELEKTRONIK, 61302021121
82 J8, J9 HEADER, 1x3, 0.1" WÜRTH ELEKTRONIK, 61300311121
9 5 J3, J6-J9 SHUNT, 0.1" WÜRTH ELEKTRONIK, 60900213421
10 1 LP1 SOCKET, LAMP SOCKET, WEDGE, T3 1/4 CML INNOVATIVE TECH., LH10
11 1 BULB, WEDGE, 28V, .1A, 1.6M JKL Components, 400
12 1 CABLE, 2M 4-WIRE UNSHIELDED BINDER, 79-5001-20-04
13 4 STANDOFF, 6-32 ALUM 3/8" DIGI-KEY, 3486K-ND
14 4 MACHINE SCREW, PAN PHILLIPS 6-32, 3/8" KEYSTONE, 9904
15 4 LOCK WASHER, #6 KEYSTONE, 4700
16 4 FLAT WASHER, #6, NYLON KEYSTONE, 3122

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Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5
5
4
4
3
3
2
2
1
1
DD
CC
BB
AA
LED green
SMD or THT
TEMP-Sensor
to demoboard DC1733
optional
enable internal Pullup: PA0, PA1, PA3
SDA SCL
LED red
Orbitec_OR1206_BA9
TE CONNECTIVITY / ALCOSWITCH
5V not needed
3.28V
J6: Jumper 1-2 internal LTC2997 Sensor selected Jumper 2-3 Sensor Q1 selected ext. Diode wired to Pin 2 and Pin 4, no Jumper
1630 McCarthy Blvd. Milpitas, CA 95035 Phone: [phone] Fax: [phone] www.linear.com
LTC CONFIDENTIAL FOR CUSTOMER USE ONLY
CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER - SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMERS RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
TEConcept GmbH Wentzingerstr. 21 D 79106 Freiburg tel.: [phone] www.teconcept.de
ground terminal should be the external case of light bulb socket!
50V
BST
SW
SYNC
FBldo
FBout
CPOR
RT
SC1n
WAKEn
DA
WAKEn
TXD2
TXD1 RXD1
TXEN2
TXEN1
SC2nSC1n
SC2n
SYNC
SR
TXEN1
TXD1 TXEN2
TXD2
Q2
CQ1
DIO
SC2n
SR
TXD2
RESETn
TXD1
Vpll
TDO
TMS
TCK
LED
MISO
MOSI
SPCK
Opto
SWITCH
D+
D-
TDI
SC1n
TDI
TMS
TCK
TDO
RESETn
Q2
EN
L+
RXD1
TXEN2 TXEN1
RXD2
WAKEn
RESETn
Opto
LED
SWITCH
RST_n
RESETn
RST_n
LDOin
EN
L+ DIO
L+
RXD1
RSTn
CPOR
0
0
0
00
000
0
0
VDD3x
0
0
VDD3
0
0
0
1V8ref
0
VDD18
0
0
VDD3
VDD18
VDD18
VDD3
VDD18
0
VDD3
0 0
0
VDD3
0
0
VDD3
VDD3VDD3
VDD18
0 0 0
0 0 0 0 0
0
VDD3
0
1V8ref
0
0
0
0
0
0
0
00
0 0
VDD3
VDD3
0
0
VDD3
0
VDD3
0
VDD3x
VDD3
VDD3
VDD3
0
0
0
VDD3
0
VDD3
0
RSTn
4mV/K
4mV/K
RSTn
Title Size Rev
Date: Sheetof
1.1
LT3669 DEMO CIRCUIT DC2227A
A3
1 8Wednesday, November 05, 2014
Title Size Rev
Date: Sheetof
1.1
LT3669 DEMO CIRCUIT DC2227A
A3
1 8Wednesday, November 05, 2014
Title Size Rev
Date: Sheetof
1.1
LT3669 DEMO CIRCUIT DC2227A
A3
1 8Wednesday, November 05, 2014
TP8TP8
1
R4188.7kR4188.7k
C11 1uF C11 1uF
R37 1kR37 1k
R51
220R
R51
220R
C29 DNP C29 DNP
R2 0R R2 0R
C17 DNP C17 DNP
U4
LTC2997HDCB
U4
LTC2997HDCB
D+
1
D-
2VPTAT 3
VCC4 GND
5
Vref 6
PP
7
C10 1uF C10 1uF
C15
220nF_X7R
C15
220nF_X7R
L1 10uH L1 10uH
1
2
D1 DFLS160 D1 DFLS160
R16100kR16100k
TP3TP3
1
Q1 MMBT3904 Q1 MMBT3904
1
2 3
TP29 Hole4mm TP29 Hole4mm
1
R30 1kR30 1k
D4 SM6T39A D4 SM6T39A
C4 100nF C4 100nF
TP19TP191
TP14TP141
R14100RR14100R
J1 DNP J1 DNP
1
2
R40100RR40100R
R36 1kR36 1k
D3 SM6T39A D3 SM6T39A
R34 1.8k R34 1.8k
Y2 DNP Y2 DNP
R27 1kR27 1k
C3 100nF C3 100nF
TP10TP10
1
C2 100nF C2 100nF
R1 1k R1 1k
C18 22uF_X5R C18 22uF_X5R
J7 JTAG J7 JTAG
12 34
5 6
7 8
910
11 12 13 14
15 16
17 18
19 20
J9
Jumper2-3
J9
Jumper2-3
1
2
3
R3 41.2kR3 41.2k
R45 100k R45 100k
LED2
KPG-1608SURKC-T
LED2
KPG-1608SURKC-T
C23100nFC23100nF
R281k R281k
D6 DNPD6 DNP
TP28 Hole4mm TP28 Hole4mm
1
R1284.5kR1284.5k
R5510kR5510k
L2 CDRH50D28RNP-330MC L2 CDRH50D28RNP-330MC
1
2
LED1 VLMTG1300-GS08 LED1 VLMTG1300-GS08
R54100RR54100R
TP24 Fiducial TP24 Fiducial
1
C7 18pF C7 18pF
C9 4.7uF C9 4.7uF
R11 1kR11 1k
C1 100nF C1 100nF
TP22TP22
1
TP21TP21
1
R32 1kR32 1k
R2210kR2210k
U2
DNP
U2
DNP
IN
1OUT 2
GND
3
R53 4.7k R53 4.7k
R15 1k R15 1k
U3
ATSAM3S2AA-MU
U3
ATSAM3S2AA-MU
ADVREF
1
GND2
2
PB0/AD4
3
PB1/AD5
4
PB2/AD6
5
PB3/AD7
6
VDDIN
7
VDDOUT
8
PA17/PGMD5/AD0
9
PA18/PGMD6/AD1
10
PA19/PGMD7/AD2
11
PA20/AD3
12
VDDIO13
13
PA16/PGMD4
14
PA15/PGMD3
15
PA14/PGMD2
16
PA13/PGMD1
17
VDDCORE
18
PA12/PGMD0
19
PA11/PGMM3
20
PA10/PGMM2
21
PA9/PGMM1
22
PA8/XOUT32/PGMM0
23
PA7/XIN32/PGMNVALID
24
TDI/PB425
PA6/PGMNOE 26
PA5/PGMRDY27
PA4/PGMNCMD 28
NRST29
TST 30
PA331
PA2/PGMEN232
VDDIO33 33
GND3434
PA1/PGMEN135
PA0/PGMEN036
TDO/TRACESWO/PB537
JTAGSEL38
TMS/SWDIO/PB639
TCK/SWCLK/PB740
VDDCORE4141
ERASE/PB1242
DDM/PB1043
DDP/PB1144
XOUT/PB845
XIN/PB9/PGMCK 46
VDDIO47 47
VDDPLL48
PP 49
TP20TP20
1
C6 18pF C6 18pF
R35 1.8k R35 1.8k
R46 100k R46 100k
J6
Jumper
J6
Jumper
1
2
3
4
C5 4.7uF C5 4.7uF
TP25 Fiducial TP25 Fiducial
1
R311k R311k
R10 1kR10 1k
C13 1uF C13 1uF
C28 DNP C28 DNP
Y1
14.7456MHz
Y1
14.7456MHz
1
2
LED3 KPG-1608SURKC-T LED3 KPG-1608SURKC-T
J2
Binder_09-3441-500-05
J2
Binder_09-3441-500-05
1
2
3
4
5 6
7
TP33TP33
1
LP1 28V100mA LP1 28V100mA
12
TP6TP6
1
TP1TP1
1
TP31 Hole4mm TP31 Hole4mm
1
TP15TP15
1
D7 BAV199 D7 BAV1992
1
3
TP35 Fiducial TP35 Fiducial
1
R13 1kR13 1k
R33 1kR33 1k
C19 1uF C19 1uF
TP17TP17
1
TP18TP18
1
R25 1kR25 1k
R6 38.3kR6 38.3k
R381k R381k
U302
GP1S53VJ000F
U302
GP1S53VJ000F
12
34
R4947kR4947k
R42 4.7k R42 4.7k
J4
HEADER 2X8 2MM
J4
HEADER 2X8 2MM
12
34
56
7 8
910
11 12
13 14
15 16
R47 100k R47 100k
TP9TP9
1
TP26 Fiducial TP26 Fiducial
1
R19100kR19100k
R7 100kR7 100k
R50 4.7k R50 4.7k
SW1 FSM4JSMA SW1 FSM4JSMA
1
23
4
U1
LT3669HUFD-2
U1
LT3669HUFD-2
BD
17
LDOin
18
SW
15
BST
16
SYNC
24
SR
25
RSTn
28
SC1n
1
SC2n
2
WAKEn
3
RXD1
4
TXEN1
5
TXD1
6
TXEN2
7
TXD2
8
GND29
29
DA
14
CQ1 10
Q2 9
L+ 11
EN/UVLO12
DIO 13
AGND 23
FBLDO20
LDO19
ILIM 26
RT 22
CPOR 27
FBout 21
TP27 Fiducial TP27 Fiducial
1
C31 1uFC31 1uF
J5 DNP J5 DNP
1 2 3
4
5
6
J3 Jumper J3 Jumper
1
2
R24 1kR24 1k
R52 DNP R52 DNP
TP30 Hole4mm TP30 Hole4mm
1
TP34 Fiducial TP34 Fiducial
1
PT 21PTPT 21PT
1
C25
470pF_100V
C25
470pF_100V
TP23TP23
1
C14100nFC14100nF
D2 SM6T39A D2 SM6T39A
C16 100nF C16 100nF
R4 10.2k R4 10.2k
J8
Jumper2-3
J8
Jumper2-3
1
2
3
R48 100k R48 100k
C100 Optional_Tantal_AC100 Optional_Tantal_A
R1814kR1814k
TP5TP5
1
R29 1kR29 1k
C26 10uF_50V_X7R C26 10uF_50V_X7R
R44 0R R44 0R
R391k R391k
R17100kR17100k
D5 SM6T39A D5 SM6T39A
C8 4.7uF_X5R C8 4.7uF_X5R
TP32TP32
1
C20100nFC20100nF
R21 10k R21 10k
PT 4PTPT 4PT
1
C27 DNP C27 DNP
TP13TP13
1
R2610kR2610k
C30 470p C30 470p
C24
470pF_100V
C24
470pF_100V
TP11TP11
1
R20 4.42kR20 4.42k
R43 4.7k R43 4.7k
R23 1kR23 1k
C21100nFC21100nF
C12 1uF C12 1uF
C22 1uF C22 1uF
D8 DNP D8 DNP
TP16TP16
1
C32 DNP C32 DNP
TP2TP2
1
C33 10pF C33 10pF

12
dc2227af
DEMO MANUAL DC2227A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2015
LT 0415 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
Thisdemonstration board (DEMOBOARD)kit being soldor provided by LinearTechnology is intendedfor use forENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LT C assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation

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