Linear Technology DC1684A-B Kurzanleitung zur Einrichtung

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DC1684A-A

ANALOG DEVICES

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dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

Description

LTC2758/LTC2752

Dual SPI IOUT

18-Bit/16-Bit DACs

Demonstration circuit 1684A-A features the LT C

2758A

18-bit SoftSpan™ IOUT DAC. DC1684A-B features the

pin-compatible 16-bit LTC2752A. The digital interface is

a simple, 4-wire Serial Peripheral Interface (SPI), aug-

mented with separate CLEAR and LDAC pins that reset

the output to zero and load the DAC code, respectively.

These devices feature six output ranges: 0V to 5V

, 0V to

10V, ±5V, ±10V, ±2.5V, and –2.5V to 7.5V. These ranges

are programmable through the SPI interface or through

separate span control pins if SoftSpan operation is not

needed. Voltage input offset and gain adjustment pins

L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks

and SoftSpan and QuikEval are trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

BoarD photo

facilitate trimming of residual DC errors without impacting

the excellent temperature stability of this device.

The DC1684A-B uses LT

1468 amplifiers recommended

for 16-bit applications. The DC1684A-A uses low noise,

low offset LT1012A amplifiers for reference inversion, and

a composite amplifier for I-V conversion that provides

18-bit accuracy and fast settling. Amplifier selection is

detailed in the LTC2758 and LTC2752 data sheets.

Design files for this circuit board are available at

http://www.linear.com/demo/DC1684A

dc1684aa/ab F01

ANALOG POWER

SUPPLY

(NORMALLY ±15V)

DAC

CONNECTIONS

RIBBON CABLE TO

DC590 CONTROLLER

Figure 1. Connection Diagram

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

Quick start proceDure

Figure 2. Software Screenshot

Connect a low noise ±15V power supply to the AMPV+,

GND, and AMPV– turret posts on the DC1684A board.

Connect J1 to a DC590 USB serial controller using the

supplied 14-conductor ribbon cable. Connect DC590 to a

host PC with a standard USB A/B cable. Run the evaluation

software supplied with the DC590, or download it from

www.linear.com/software. The correct control panel will

be loaded automatically (shown in Figure 2). The software

automatically sets the LTC2758A / LTC2752A outputs ac-

cording to the entries in the control panel. A square wave

option is available to test the settling time. The MSPAN

jumper should be set to 0 if software span control is de-

sired. Setting MSPAN high (1) causes the S2, S1 and S0

pins to set the span according to the table printed on the

board. The corresponding span should be selected in the

software to ensure that the calculated DAC code is correct.

Additional software documentation may be available from

the Help menu item, as features may be added periodically.

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

harDware setup

JUMPERS

MSPAN: Manual Span Control Pin. MSPAN is used to

configure the LTC2758/LTC2752 for operation in a single,

fixed output range. If MSPAN is 1, it will be configured for

single span use. If MSPAN is 0, it will be set through the

QuikEval™ software. Default position is 0 (low).

S0, S1, S2: Used to set the fixed output range if MSPAN

is 1.

Table 1. MSPAN Configuration

S2 S1 S0 SPAN

0 0 0 0V to 5V

0 0 1 0V to 10V

0 1 0 ±5V

0 1 1 ±10V

1 0 0 ±2.5V

1 0 1 –2.5V to 7.5V

GEADJA, GEADJB: Gain Adjust Pins. If no adjustments are

required, select GND. Selecting EXT connects the pin to

the turret, allowing external adjustment to null gain error

or compensate for reference errors.

VOSADJA,VOSADJB: Offset Adjustment Selection for

DACA or DACB. If no offset adjustment is required, select

GND. Selecting EXT connects the offset pin to the turret,

allowing external adjustment of offset.

VREFA,VREFB: Select Source for VREF on Either DACA

or DACB. 5V connects to onboard LTC6655 5V reference;

EXT connects to the turret, allowing an external reference

to be used.

VCC: Select Source for 5V VCC Supply. Set to 5V for sup-

ply by on-board LTC6655 reference (recommended). Set

to REG to be supplied by regulated supply from DC590

controller and remove the jumper to supply externally.

CLR:Asynchronous Clear Input. Tie to 0 to set all DAC

outputs to 0V.

LDAC:Asynchronous DAC Load Input. Tie to 0 to update

all DACs if CS is high.

RFLAG:Reset Flag Output. Remove jumper and probe

middle pin for RFLAG status.

ANALOG CONNECTIONS (TURRET POSTS)

OUTA/B: DAC Voltage Outputs.

VREFA/B:DAC Reference Voltages.If the on-boardLTC6655

references are selected, the voltage may be measured at

these points. If a remote reference is selected, then an

external reference must be applied to these points.

VOSADJA/B:DAC Offset AdjustInputs. Use only ifthe VOSA

jumper is set to EXT. The nominal range of these pins is

±5V, which will provide ±2048LSB of offset adjustment.

GEADJA/B: Gain Adjust Pins. These voltage-control pins

can be used to null gain error or to compensate for refer-

ence errors. The nominal range of these pins is ±5V, which

will provide ±2048LSB of gain adjustment.

POWER AND GROUND CONNECTIONS

Analog Power: The AMPV+, AMPV–, and GND turret

posts are the analog supplies for the on-board DAC ampli-

fiers. These should be connected to a well regulated, low

noise ±15V power supply.

VCC: Connection to VCC. See the Schematic Diagrams

and the description for the VCC jumper.

Grounding: Separate power and signal grounds are pro-

vided. Signal grounds are the turrets closest to OUTA and

OUTB. Use these for measurement ground and output

return. Power GND is between the AMPV+ and AMPV –

turrets.

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 15 C1, C2, C3, C5, C6, C11-C20 CAP., X5R, 10µF, 10V, 20%, 1206 TDK, C3216X5R1A106M

2 8 C4, C7, C36, C37, C38, C39,

C40, C41

CAP., X7R, 0.1µF, 10V, 10%, 0603 AVX, 0603ZC104KAT2A

3 2 C10, C21 CAP., X7R, 0.01µF, 10V, 10%, 0603 AVX, 0603ZC103KAT2A

4 2 C22, C31 CAP., COG, 100pF, 50V, 10%, 0603 AVX, 06035A101KAT2A

5 0 C23, C29 (OPT.)

6 0 C27, C34 (OPT.) CAP., 0603

7 3 D1, D2, D3 DIODE, BAT54C, SOT23 DIODE, ZETEX, BAT54C-7-F

8 1 J1 CONNECTOR, HD2X7-079 MOLEX, 87831-1420

9 14 JP1-JP14 3-PIN, 0.079", SINGLE ROW HEADER SAMTEC, TMM103-02-L-S

10 14 XJP1-XJP14 SHUNT, 0.079", CENTER SAMTEC, 2SN-BK-G

11 2 JP15, JP16 0.01" JUMPER, SHUNT, SOLDER DOWN SAMTEC, JL-100-25-T

12 1 R1 RES., CHIP, 88.7k, 1/16W, 1%, 0603 VISHAY, CRCW060388K7FKEA

13 5 R2, R31-R34 RES., CHIP, 10k, 1/16W, 1%, 0603 NIC, NRC06F1002TRF

14 3 R3, R4, R5 RES., CHIP, 4.99k, 1/16W, 1%, 0603 NIC, NRC06F4991TRF

15 7 R11-R17 RES., CHIP, 10k, 1/16W, 5%, 0603 NIC, NRC06J103TRF

16 16 TP1-TP16 TURRET, TEST POINT MILL-MAX, 2308-2-00-80-00-00-07-0

17 1 U2 I.C., LTC6655CHMS8-5, MSOP-8 LINEAR TECHNOLOGY, LTC6655CHMS8-5#TRPBF

18 0 U3 (OPT.) I.C., LT1236ACS8-5, SO-8

19 1 U4 I.C., 24LC025, TSSOP-8 MICROCHIP, 24LC025 I /ST

20 1 U5 I.C., LT1761ES5-5, SOT23-5 LINEAR TECHNOLOGY, LT1761ES5-5#TR

21 1 U6 I.C., LT1964ES5-5, SOT23-5 LINEAR TECHNOLOGY, LT1964ES5-5#TRPBF

22 1 U10 I.C., LT1761ES5-BYP, SOT23-5 LINEAR TECHNOLOGY, LT1761ES5-BYP#TRPBF

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

parts List—1684a-a

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 1684A GENERAL BOM

2 2 C24, C30 CAP., COG, 100pF, 50V, 5%, 1206 AVX, 12065A101JAT2A

3 4 C25, C26, C32, C33 CAP., X7R, 1µF, 16V, 10%, 1206 AVX, 1206YC105KAT2A

4 0 C28, C35 (OPT.) CAP., 1206

5 6 R6, R9, R21, R22, R25, R30 RES., CHIP, 1k, 1/16W, 5%, 0603 VISHAY, CRCW06031K00JNEA

6 4 R7, R8, R23, R24 RES., CHIP, 10k, 1/16W, 5%, 0603 NIC, NRC06J103TRF

7 0 R10, R20, R26, R29 (OPT.) RES., CHIP, 0603

8 2 R18, R27 RES., CHIP, 4.02k, 1/16W, 1%, 0603 YAGEO, RC0603FR-074K02L

9 2 R19, R28 RES., CHIP, 10, 1/16W, 5%, 0603 NIC, NRC06J100TRF

10 1 U1 I.C., LTC2758ACLX, 48-LX LINEAR TECHNOLOGY, LTC2758ACLX#TRPBF

11 2 U7, U14 I.C., LT1012ACS8, SO-8 LINEAR TECHNOLOGY, LT1012ACS8#TRPBF

12 2 U8, U12 I.C., LT1360CS8, SO-8 LINEAR TECHNOLOGY, LT1360CS8#TRPBF

13 2 U9, U13 I.C., LTC2054HVCS5, TSOT23-5 LINEAR TECHNOLOGY, LTC2054HVCS5#TRPBF

14 1 U11 I.C., LTC6244HVCDD, 8-PIN-3×3, DD LINEAR TECHNOLOGY, LTC6244HVCDD#TRPBF

parts List—1684a-B

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 1 1684A GENERAL BOM

2 0 C24, C25, C26, C30, C32, C33 (OPT.) CAP., 1206

3 2 C28, C35 CAP., COG, 33pF, 50V, 5%, 1206 AVX, 12065A330JAT2A

4 0 R6-R9, R18, R19, R21-R25, R27, R28 RES., 0603

5 0 R30 (OPT.)

6 4 R10, R20, R26, R29 RES., CHIP, 0, 1/16W, 0603 VISHAY, CRCW06030000Z0EA

7 1 U1 I.C., LTC2752ACLX, 48-LX LINEAR TECHNOLOGY, LTC2752ACLX#TRPBF

8 4 U7, U8, U12, U14 I.C., LT1468CS8, SO-8 LINEAR TECHNOLOGY, LT1468CS8#TRPBF

9 0 U9, U13 (OPT.) I.C., TSOT23-5

10 0 U11 (OPT.) I.C., 8-PIN-3×3,DD

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

schematic Diagrams

Figure 3. DC1684A Dual, SPI, IOUT, 18-/16-Bit DAC

D D

C C

B B

A A

1. ALL RESISTORS ARE 0603.

ALL CAPACITORS ARE 0603.

NOTE: UNLESS OTHERWISE SPECIFIED

2. INSTALL SHUNTS AS SHOWN.

GEADJB

CLR#

LDAC#

RFLAG#

MSPAN

GEADJA

OUTB

GND

OUTA

GND

2/3/2011

EXT

GND

VOSADJA

VOSADJB

EXT

GND

EXT

GND

EXT

GND

ASSY

-A

-B

-BIT

LTC2758ACLX

LTC2752ACLX

U8, U12 U9,U13

LT1360CS8

U11

LT1468CS8

LTC2054HVCS5 LTC6244HVCDD

ASSY

-A

-B

C24

100pF

C25 C26 C28

1uF

ASSY

-A

-B

R6 R7 R8 R9

C30 C32 C33 C35

R10 R19 R20 R22 R24 R25 R27R26R23 R28 R29 R30

U7, U14

LT1012ACS8

LT1468CS8

R18 R21

OPT OPT

10K 10K 1K

4.02K 1K10

1K 10K 10K 1K

4.02K

10 1K

1uF

33pF

100pF 1uF 1uF

33pF

****

***

0 10

-2.5 7.5

0 -5 5

-2.5 2.5

-10 10

0 5

S1S2

SPAN

FBB

FBA

OPT OPT OPT

OPT OPT

OPT OPT OPT OPT OPT OPT OPT OPT

OPT OPT

OPT

OPT OPT OPTOPT OPT OPT

OPT

VREFB

CS#

SCK

MOSI

MISO

VREFA

VOSADJA

VOSADJB

VREFB

CS#

SCK

MOSI

MISO

VREFA

VCC

V+

V-

V+

V-

+5V

-5V

V+

V-

+5V

-5V

V+

V-

+5V

-5V

+5V

VCC

VOSADJB

VOSADJA

VREFB

CS#

SCK

MOSI

MISO

VREFA

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

MARK T.PRODUCTION2 02-03-11

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

MARK T.PRODUCTION2 02-03-11

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

MARK T.PRODUCTION2 02-03-11

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

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 CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DUAL, SPI, IOUT, 18/16-BIT DAC

MARK T.

N/A

LTC2758/2ACLX

DEMO CIRCUIT 1684A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

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 CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DUAL, SPI, IOUT, 18/16-BIT DAC

MARK T.

N/A

LTC2758/2ACLX

DEMO CIRCUIT 1684A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

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 CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DUAL, SPI, IOUT, 18/16-BIT DAC

MARK T.

N/A

LTC2758/2ACLX

DEMO CIRCUIT 1684A

R30R30

R17

10K R17

10K

C36

0.1uF

C36

0.1uF

U1U1

CS/LD

SCK

SDI

SRO

CLR

LDAC

RFLAG

M-SPAN

GND

IOUT2BF

IOUT2BS

IOUT2AF

IOUT2AS

GEADJA

RINA

RCOMA

REFA

ROFSA

RFBA

VOSADJA

IOUT1A

RFBB

VOSADJB

IOUT1B

VDD

GEADJB

RINB

RCOMB

REFB

ROFSB

DNC

TP10TP10

TP8TP8

R7R7

R26R26

C22

100pF

C22

100pF

TP13TP13

TP15TP15

R27R27

JP4JP4

U11CU11C

V+

V-

+V+

V-

+V+

V-

+V+

U14

V-

+V+

U14

4 7

JP15JP15

R25R25

R21R21

R18R18

JP8JP8

JP6JP6

TP12TP12

R11

10K R11

10K

R23R23

U11A

C26

1206

C26

1206

JP12JP12

C35

1206

C35

1206

C28

1206

C28

1206

R10R10

R13

10K R13

10K

R6R6

R20R20

TP9TP9

TP14TP14 R29R29

V-

+V+

U13

V-

+V+

U13

2 5

C34

OPT

C34

OPT

C37

0.1uF

C37

0.1uF

R14

10K R14

10K

C41

0.1uF

C41

0.1uF

U11B

JP3JP3

V-

+V+

V-

+V+

2 5

R12

10K R12

10K

R24R24

R8R8

JP13JP13

C33

1206

C33

1206

C23

OPT. 1206

C23

OPT. 1206

R28R28

R19R19

JP1JP1

C40

0.1uF

C40

0.1uF

C25

1206

C25

1206

R15

10K R15

10K

JP5JP5

C29

OPT. 1206

C29

OPT. 1206

JP11JP11

C39

0.1uF

C39

0.1uF

C27

OPT

C27

OPT

JP16JP16

R16

10K R16

10K

+V+

V-

U12

+V+

V-

U12

C24

1206

C24

1206

TP11TP11

C32

1206

C32

1206

JP7JP7

R22R22

C38

0.1uF

C38

0.1uF

V-

+V+

V-

+V+

4 7

C30

1206

C30

1206

C31

100pF

C31

100pF

R9R9

JP9JP9

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

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 Diagrams

Figure 4. DC1684A Dual, SPI, IOUT, 18-/16-Bit DAC

D D

C C

B B

A A

VREFA

VCC

VREFA

EXT

VCC

REF

REG

AMPV+

GND

AMPV-

2/3/2011

12V

VREFB

EXT

VREFB

V+

V-

VCC

+5V

V+

+5V

-5V

VREFA

CS#

SCK

MOSI

MISO

VREFB

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

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 CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DUAL, SPI, IOUT, 18/16-BIT DAC

MARK T.

N/A

LTC2758/2ACLX

DEMO CIRCUIT 1684A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

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 CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DUAL, SPI, IOUT, 18/16-BIT DAC

MARK T.

N/A

LTC2758/2ACLX

DEMO CIRCUIT 1684A

SIZE

DATE:

IC NO. REV.

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

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 CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

DUAL, SPI, IOUT, 18/16-BIT DAC

MARK T.

N/A

LTC2758/2ACLX

DEMO CIRCUIT 1684A

C12

10uF

1206

C12

10uF

1206

LTC6655CHMS8-5

VIN

SD#

GND

OUTF

OUTS

C21

0.01uF

C21

0.01uF

OPT.

GND

TRIM

VIN

VOUT

TP4TP4

10uF

1206

10uF

1206

10.0K

C15

10uF

1206

C15

10uF

1206

88.7K

C14

10uF

1206

C14

10uF

1206

C13

10uF

1206

C13

10uF

1206

TP1TP1

10uF

1206

10uF

1206

C11

10uF

1206

C11

10uF

1206

10uF

1206

10uF

1206

TP6TP6

0.1uF

10uF

1206

10uF

1206

BAT54C

U10

LT1761ES5-BYP

U10

LT1761ES5-BYP

GND

ADJ

BYP

OUT

TP5TP5

SCKSCK

R34

10.0K

R34

10.0K

R31

10.0K

R31

10.0K

4.99K

R32

10.0K

R32

10.0K

LT1964ES5-5

GND

BYP

OUT

C20

10uF

1206

C20

10uF

1206

HD2X7-079-MOLEX

MOSI/SDA

EESDA

V+

SCK/SCL

EEVCC

MISO

EESCL

EEGND

AUX

GND

4.99K

JP14JP14

JP10JP10

MOSIMOSI

TP16TP16

4.99K

TP2TP2

BAT54C

LT1761ES5-5

GND

SHDN

BYP

OUT

CS#CS#

TP3TP3

C16

10uF

1206

C16

10uF

1206

MISOMISO

JP2JP2

C19

10uF

1206

C19

10uF

1206

10uF

1206

10uF

1206

C18

10uF

1206

C18

10uF

1206

C17

10uF

1206

C17

10uF

1206

BAT54C

24LC025-I /ST

VSS

SDA

SCL

VCC

R33

10.0K

R33

10.0K

TP7TP7

0.1uF

C10

0.01uF

C10

0.01uF

dc1684aabfb

DEMO MANUAL

DC1684A-A/DC1684A-B

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2012

LT 0314 REV B • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING 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. LTC 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

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