Linear Technology DC1805A Series Manuale utente

dc1805af

DEMO MANUAL DC1805A

Description

LTC6362

Driving 18-Bit SAR ADC

The LTC

6362 is a low power, low noise differential op

amp with rail-to-rail input and output swing that has been

optimized to drive low power SAR ADCs. The amplifier

may be configured to buffer a fully differential input signal

or convert a single-ended input signal to a differential

output signal.

The LTC2380/LTC2379/LTC2378/LTC2377/LTC2376are low

power, low noise ADCs with serial outputs that can operate

from a single 2.5V supply. The DC1805A demonstrates

the DC and AC performance of the LTC6362 driving the

LTC2379-18 when used in conjunction with the DC590B

QuikEval™ and DC718 fast DACs data collection boards.

Use the DC590B to demonstrate DC performance such

as peak-to-peak noise and DC linearity. Use the DC718

if precise sampling rates are required or to demonstrate

AC performance such as SNR, THD, SINAD and SFDR.

The DC1805A is intended to demonstrate recommended

grounding, component placement and selection, routing

and bypassing for LTC6362 and the ADC.

Design files for this circuit board are available at

http://www.linear.com/demo

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

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

the property of their respective owners.

Figure 1. DC1805A Connection Diagram

dc1805af

DEMO MANUAL DC1805A

Description

Figure 2. DC1805A Test Diagram

Table 1. DC1805A Assembly Options

ASSEMBLY VERSION PART NUMBER MAX CONVERSION RATE NUMBER OF BITS MAX CLK IN FREQUENCY

DC1805A-A LTC2380CMS-16 2Msps 16 100MHz

DC1805A-B LTC2378CMS-16 1Msps 16 50MHz

DC1805A-C LTC2377CMS-16 500ksps 16 25MHz

DC1805A-D LTC2376CMS-16 250ksps 16 12.5MHz

DC1805A-E LTC2379CMS-18 1.6Msps 18 99.2MHz

DC1805A-F LTC2378CMS-18 1Msps 18 62MHz

DC1805A-G LTC2377CMS-18 500ksps 18 31MHz

DC1805A-H LTC2376CMS-18 250ksps 18 15.5MHz

Quick start proceDure

dc1805af

DEMO MANUAL DC1805A

Dc718 Quick start proceDure

Check to make sure that all switches and jumpers are

set as shown in the connection diagram of Figure 1. The

default connections configure the ADC to use the onboard

reference and regulators to generate the required common

mode voltages. The analog input is DC coupled. Connect

the DC1805A to a DC718 USB high speed data collection

board using connector J4. Then, connect the DC718 to a

host PC with a standard USB A/B cable. Apply 9V to the

indicated terminals. Then apply a low jitter signal source

to J3. Connect a low jitter 100MHz 3.3VP-P sine wave or

square wave to connector J1. Note that J1 has a 50Ω

termination resistor to ground.

Run the QuikEval-II software (Pscope.exe version K72

or later) supplied with the DC718 or download it from

www.linear.com.

Complete software documentation is available from the

Help menu. Updates can be downloaded from the Tools

menu. Check for updates periodically as new features

may be added.

The PScope™ software should recognize the DC1805A

and configure itself automatically.

Click the Collect button (see Figure 4) to begin acquiring

data. The Collect button then changes to Pause, which

can be clicked to stop data acquisition.

Dc590B setup

IMPORTANT! To avoid damage to the DC1805A, make

sure that VCCIO (JP5) is set to 3.3V before connecting

the DC590B to the DC1805A.

Connect the DC590B to a host PC with a standard USB

A/B cable. Connect the DC1805A to a DC590B USB serial

controller using the supplied 14-conductor ribbon cable.

Run the evaluation software supplied with the DC590B or

download it from www.linear.com.

The correct control panel will be loadedautomatically. Click

the Collect button to begin reading the ADC.

This board is tested by measuring the distortion at the

differential output given a –1dBFS, 2kHz single-ended

input as shown in Figure 2.

For SINAD, THD or SNR testing a low noise, low distor-

tion generator such as Audio Precision SYS-2722, B&K

Type 1051 or Stanford Research DS360 should be used.

A low jitter RF oscillator such as the Marconi Instruments,

Multisource Generator 2026 should be used as the clock

source.

To test the boards please follow the steps below:

1) Make sure that all the jumpers are set as shown in

Figure 2 (DC1805A Test Diagram).

2) Power up the board by applying 9VDC.

3) Apply the clock signal to connector J1. Clock frequency

99.2MHz (to achieve 1.6Msps conversion rate, please

refer to the Clock Source section for more detailed

information), VIN 3.3VP-P.

4) A single pole lowpass filter should be used for best

SNR measurement data. One option is to create an on-

board RC low pass filter by populating R5 with 200Ω

and C33 with 0.22µF. It is very important to use a very

low distortion capacitor. In order to balance both inputs

of the LTC6362 populate R12 with a 200Ω resistor in

parallel with a 0.22µF capacitor.

5) Apply a 2kHz, –1dBFS signal to connector J3.

The performance that results from these connections are

displayed in Figure 4.

Quick start proceDure

dc1805af

DEMO MANUAL DC1805A

Dc1805a setup

DC Power

The DC1805A requires 9VDC and draws less than 70mA.

Most of the supply current is consumed by the CPLD,

regulators and discrete logic on the board. The 9VDC input

voltagepowers theLTC6362 andthe ADCthrough LT

1763

regulators which provide protection against accidental

reverse bias. Additional regulators provide power for the

CPLD. See Figure 1 for connection details.

Clock Source

You must provide a low jitter 3.3VP-P maximum sine or

square wave to J1. The clock input is AC-coupled so the

DC level of the clock signal is not important. A genera-

tor like the Marconi Instruments, Multisource Generator

2026, HP8644 or the DC1216A-A is recommended. Even

a good generator can start to produce noticeable jitter at

low frequencies. Therefore it is recommended for lower

sample rates to divide down a higher frequency clock

to the desired sample rate. The ratio of clock frequency

to conversion rate is 62:1 for 18-bit parts and 50:1 for

16-bit parts. If the clock input is to be driven with logic,

it is recommended that the 50Ω terminator (R1) be re-

moved. Slow rising edges may compromise the SNR of

the converter in the presence of high amplitude higher

frequency input signals.

Reference

The default referenceis a LTC6655 5V reference. Anexternal

reference can be used by removing (U3) and populating

(R6) with 0 resistor. If an external reference is used it must

settle quickly in the presence of glitches on the REF pin.

Analog Input

LTC6362 drives the analog input of the LTC2379-18 on

the DC1805A as shown in Figure 3. This circuit converts

a single-ended input signal to a differential output signal

applied at the ADC inputs. Please refer to the LTC6362 data

sheet for various configurations of the LTC6362 interface

to the SAR ADC.

AC-coupling the input may degrade the distortion per-

formance of the ADC due to nonlinearity of the coupling

capacitor.

Component Selection

When driving a low noise, low distortion ADC such as

the LTC2379-18 with the LTC6362, component selection

is important so as to not degrade performance. Resistors

should have low values to minimize noise and distortion.

Metal film resistors are recommended to reduce distortion

caused by self heating. To further reduce distortion, NPO

or silver mica capacitors should be used because of their

low voltage coefficients.

DC1805A F03

–

R17

R18

35.7Ω

C26

NPO

3900pF

R28

35.7Ω

R19

0Ω

0402

R19

0Ω

0402

R27

R15

R26

1k LTC6362 LTC2379-18

–

C27

NPO

3900pF

C29

NPO

3900pF

AIN+

Figure 3. LTC6362 Ground Referenced Single-Ended to Differential Converter

dc1805af

DEMO MANUAL DC1805A

Dc1805a setup

Figure 4. PScope Screenshot

Jumpers

JP1 – Sets the DC bias for VOCM of the LTC6362 to be

internally biased or externally driven. The voltage on this

pin sets the output common mode voltage level. VREF /2

is the default setting.

JP2 – Toggles the LTC6362 On and Off. Part On (5V) is

the default setting.

JP3 – In the REF position the Digital Gain Compression

is off and the analog input range at ADC inputs is 0V to

VREF. In the GND position Digital Gain Compression is

turned on and the analog input range at ADC inputs is

0.1VREF to 0.9VREF.

JP4 – Ties the WP pin to VCC or GND. WP is the hardware

write-protect pin. If tied to VCC, hardware write protection

is enabled. If WP is tied to GND, the hardware write-

protection is disabled.

JP5 – VCCIO sets the output levels at J3 to either 3.3V

or 2.5V. Use 3.3V to interface to the DC718 which is the

default setting.

dc1805af

DEMO MANUAL DC1805A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

1 14 C1, C2, C3, C4, C6, C7, C8, C10, C15,

C16, C18, C20, C21, C28

Capacitor, X7R, 0.1µF, 25V, 10%, 0603 AVX, 06033C104KAT2A

2 5 C22, C35, C38, C41, C44 Capacitor, X7R, 1µF, 16V, 10%, 0603 AVX, 0603YC105KAT2A

3 1 C9 Capacitor, X5R, 47µF 6.3V, 20%, 0805 Taiyo Yuden, JMK212BJ476MG-T

4 7 C5, C11, C17, C37, C40, C43, C46 Capacitor, X5R, 10µF 6.3V, 20%, 0603 TDK, C1608X5R0J106MT

5 1 C12 Capacitor, X7R, 4.7µF 10V, 10%, 0805 AVX, 0805ZC475KAT2A

6 1 C19 Capacitor, X7R, 0.1µF, 25V, 5%, 0805 AVX, 08053C104JAT2A 

7 1 C24 Capacitor, X7R, 0.01µF, 16V,10%, 0402 AVX, 0402YC103KAT2A

8 0 C13, C14, C23, C25, C30, C31, C32, C33 Capacitor, 0603 OPT

9 3 C26, C27, C29 Capacitor, Ceramic 3900pF, 100V NPO,1206 AVX, 12061A392JAT2A

10 1 C34 Capacitor, X5R, 22µF 16V, 20%, 1210 Taiyo Yuden, EMK325BJ226MM-T

11 4 C36, C39, C42, C45 Capacitor, X7R, 0.01µF, 16V,10%,0603 AVX, 0603YC103KAT

12 8 C47, C48, C49, C50, C51, C52, C53, C54 Capacitor, X7R, 0.1µF, 16V,10%, 0402 TDK, C1005X7R1C104KT

13 5 E1, E2, E3, E4, E5, E6, E7, E8, E9 TP, Turret, 0.094" Mill-Max, 2501-2-00-80-00-00-07-0

14 3 J1, J2, J3 Connector, BNC-5PINS Connex, 112404

15 1 J4 Connector, 40 Pins SMT, CON-EDGE40-100 Samtec, TSW-120-07-L-D

16 1 J5 Header, 2×7, 0.079" Molex, 87831-1420

17 1 J6 Header, 2×5, 0.100", HD2X5-100 Samtec, TSW-105-07-L-D

18 5 JP1-JP5 Jumper, 1×3, 0.100", HD1X3-100 Samtec, TSW-103-07-L-S

19 1 R1 Resistor, Chip 49.9, 1%, 1206 NIC, NRC12F49R9TRF

20 11 R2, R3, R13, R14, R15, R17, R20, R21,

R26, R27, R30

Resistor, Chip 1k, 1%, 0603 NIC, NRC06F1001TRF

21 5 R4, R7, R8, R9, R44 Resistor, Chip 33, 1%, 0603 NIC, NRC06F33R0TRF

22 4 R5, R10, R12, R23 Resistor, Chip 0, 1%, 0603 NIC, NRC06F0000TRF

23 0 R6, R11, R16, R24, R25 Resistor, 0603 OPT

24 2 R18, R28 Resistor, Chip 35.7, 1%, 0603 Vishay, CRCW060335R7FKEA

25 2 R19, R29 Resistor, Chip 0, 1/16W, 1%, 0402 NIC, C04F0000TRF

26 1 R22 Resistor, Chip 2k, 1%, 0603 NIC, NRC06F2001TRF

27 3 R31, R32, R33 Resistor, Chip 4.99k, 1%, 0603 NIC, NRC06F4991TRF

28 1 R34 Resistor, Chip 10k, 1%, 0402 NIC, NRC04F1002TRF

29 4 R36, R37, R38, R40 Resistor, Chip 1k, 1%, 0402 NIC, NRC04F1001TRF

30 1 R39 Resistor, Chip 10k, 1%, 0603 NIC, NRC06F1002TRF

31 1 R41 Resistor, Chip 2.80k, 1%, 0603 NIC, NRC06F2801TRF

32 1 R42 Resistor, Chip 1.69k, 1%, 0603 NIC, NRC06F1691TRF

33 1 R43 Resistor, Chip 1.54k, 1%, 0603 NIC, NRC06F1541TRF

34 2 U1, U6 IC., Tinylogic UHS Inverter, SC70-5 Fairchild, NC7SZ04P5X

35 2 U2, U5 IC., Tinylogic ULP-A Unbuffered Inverter, SC70-5 Fairchild, NC7SVU04P5X

36 1 U3 IC., LTC6655CHMS8-5, MS8 Linear Technology, LTC6655CHMS8-5#PBF

37 1 U4 IC., Single D Flip Flop, US8 ON Semiconductor, NL17SZ74 (USG)

38 1 U7 IC., Single SPST Bus Switch, SC70-5 Fairchild, NC7SZ66P5X

39 1 U9 IC., LTC6362CMS8, MS8 Linear Technology, LTC6362CMS8

40 1 U10 IC., Serial EEPROM, TSSOP Microchip, 24LC024-I/ST

dc1805af

DEMO MANUAL DC1805A

parts List

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

41 1 U11 IC., LT1763CS8-1.8, SO8 Linear Technology, LT1763CS8-1.8#PBF

42 1 U12 IC., LT1763CS8, SO8 Linear Technology, LT1763CS8#PBF

43 1 U13 IC., MAX II Family, TQFP100 Altera, EPM240GT100C5N

44 1 U14 IC., LT1763CS8-2.5, SO8 Linear Technology, LT1763CS8-2.5#PBF

45 1 U15 IC., LT1763CS8-5, SO8 Linear Technology, LT1763CS8-5#PBF

46 4 MH1-MH4 Stand-Off, Nylon (Snap On), 0.375" Tall Keystone, 8832 (Snap On)

47 5 Shunts as Shown on Assembly Drawing

(JP1-JP5)

Shunt, .100" Center Samtec, SNT-100-BK-G

48 2 Stencil for Top and Bottom Stencil #DC1805A-2

DC1805A-A

1 1 DC1805A-A General BOM

2 1 U8 IC., LTC2380CMS-16, MS16 Linear Technology, LTC2380CMS-16

3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT

DC1805A-B

1 1 DC1805A-B General BOM

2 1 U8 IC., LTC2378CMS-16, MS16 Linear Technology, LTC2378CMS-16

3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT

DC1805A-C

1 1 DC1805A-C General BOM

2 1 U8 IC., LTC2377CMS-16, MS16 Linear Technology, LTC2377CMS-16

3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT

DC1805A-D

1 1 DC1805A-D General BOM

2 1 U8 IC., LTC2376CMS-16, MS16 Linear Technology, LTC2376CMS-16

3 0 R35 (OPT) Resistor, Chip 300Ω, 1%, 0402 OPT

DC1805A-E

1 1 DC1805A-E General BOM

2 1 U8 IC., LTC2379CMS-18, MS16 Linear Technology, LTC2379CMS-18

3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF

DC1805A-F

1 1 DC1805A-F General BOM

2 1 U8 IC., LTC2378CMS-18, MS16 Linear Technology, LTC2378CMS-18

3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF

DC1805A-G

1 1 DC1805A-G General BOM

2 1 U8 IC., LTC2377CMS-18, MS16 Linear Technology, LTC2377CMS-18

3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF

DC1805A-H

1 1 DC1805A-H General BOM

2 1 U8 IC., LTC2376CMS-18, MS16 Linear Technology, LTC2376CMS-18

3 1 R35 Resistor, Chip 300Ω, 1%, 0402 NIC, NRC04F3000TRF

dc1805af

DEMO MANUAL DC1805A

schematic Diagram

D D

C C

B B

A A

100MHz Max

CLK

3.3Vpp

AIN-

EXT VCM

AIN+

0805

EXT REF

TO CPLD

FROM CPLD

0402

PROG

0402

BUSY

SDO

SCK

CNV

DB17

DB16

REF

DC590

EXT VOCM

0402

0805

SHDN

PWR ON

REF

GND

2.0

LTC2380CMS-16

0.25

-E

LTC2376CMS-16

-H

0.25

-A

LTC2376CMS-18

BITS

0.5

-D

LTC2377CMS-18

0.5

MSPS

-G

ASSY

LTC2377CMS-16

1.0

-C

1.6

LTC2378CMS-18 18

1.0

-F

LTC2378CMS-16 16-B

6.3V

1206

1. ALL RESISTORS ARE IN OHMS, 0603.

ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTE: UNLESS OTHERWISE SPECIFIED

2. INSTALL SHUNTS AS SHOWN.

1206

LTC2379CMS-18

DC1805A

LTC6362 DRIVING 18 - BIT SAR ADC

N/A

LTC6362CMS8

ERJON Q.

10-14-11

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

CIRCU IT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATI ON. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMA NCE 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

ERJON Q.PRODUCTION FAB- 2 10-14-11

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

DB8

DB13

DB12

DB11

DB9

DB10

DB14

DB15

CLKOUT

CNVST_33

DB16

DB17

CLK

DC590_DETECT

SCK

SDO

BUSY

SDO

SCK

CNV

+3.3V +3.3V

+5V

+3.3V

+2.5V

+3.3V

9V-10V

+3.3V+3.3V

9V-10V

+5V

R33

4.99k

R16

OPT

C29

3900pF

NPO

C33

OPT

BNC

R10

R17

C18

0.1uF

NC7SZ04P5X

R26

JP3

C13

OPT

C28

0.1uF

JP1

R25

OPT

R13

0.1uF

BNC

C21

0.1uF

NL17SZ74

GND

CLR PR

VCC

R14

0.1uF

R20

49.9

1206

3201S-40G1

1 2

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

21 22

23 24

25 26

27 28

29 30

31 32

33 34

35 36

37 38

39 40

9 10

11 12

13 14

15 16

17 18

19 20

21 22

23 24

25 26

27 28

29 30

31 32

33 34

35 36

37 38

39 40

NC7SVU04P5X

JP2

C12

4.7uF

C27

3900pF

NPO

C23

OPT

6.3V

R30

LTC6655CHMS8-5

4 5

SHDN

VIN

GND

GND GND

VOUT_S

VOUT_F

GND

OPT

R18

35.7

R29

R22

R23

U10

24LC024-I/ST

VSS

SDA

SCL

VCC

LTC6362CMS8

4 5

IN-

V-

VOCM

V+

OUT+ OUT-

SHDN

IN+

R21

R11

OPT

R32

4.99k

R15

C20

0.1uF

JP4

C25

OPT

C31

OPT

C26

3900pF

NP0

0.1uF

BNC

HD2X7-079-MOLEX

1 2

3 4

5 6

7 8

9 10

11 12

13 14

C30

OPT

NC7SZ66P5X

VCCGND

C14

OPT

10uf

R19

C15

0.1uF

R31

4.99k

R27

NC7SZ04P5X

C11

10uF

6.3V

C32

OPT

0.1uF

R24

OPT

0.1uF

NC7SVU04P5X

C24

0.01uF

C22

1uF

C10

0.1uF

C19

0.1uF

R28

35.7

47uF

6.3V

LTC23XXCMS

VDD

OVDD

REF

REF/SEL

CNV

SCK

SDO

BUSY

ROL/SDI

CHAIN

GND

IN+

IN-

R12

C16

0.1uF

C17

10uF

6.3V

dc1805af

DEMO MANUAL DC1805A

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

D D

C C

B B

A A

+3.3V

+1.8V

9V-10V

+3.3V

+1.8V

+2.5V

+3.3V

9V-10V

+3.3V

+5V

SCK

DB4

BUSY

DB8

DB2

DB14

DB11

DB16

DB9

DB1

DB3

DB10

DB17

CLK

DB6

CNVST_33

DC590_DETECT

DB13

SDO

DB7

DB12

CLKOUT

DB0

DB15

DB5

SCK

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

DC1805A

LTC6362 DRIVING 18 - BIT SAR ADC

N/A

LTC6362CMS8

ERJON Q.

6-1-11

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

DC1805A

LTC6362 DRIVING 18 - BIT SAR ADC

N/A

LTC6362CMS8

ERJON Q.

6-1-11

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

DC1805A

LTC6362 DRIVING 18 - BIT SAR ADC

N/A

LTC6362CMS8

ERJON Q.

6-1-11

+1.8 V

CNTRL

POWER

VCCIO

GND

9V-10V

0402 X 8 PLCS

0402 X 3 PLCS

0402

+3.3 V

+2.5 V

+5 V

IO21

IO38

IO56

IO68

IO86

JTAG

+3.3V

+2.5V

0402

C37

10uF

6.3V

C37

10uF

6.3V

E6E6

C47

0.1uF

C47

0.1uF

R42

1.69k

R42

1.69k

C49

0.1uF

C49

0.1uF

U14

LT1763CS8-2.5

U14

LT1763CS8-2.5

OUT 1

SEN 2

GND

BYP 4

SHDN

GND

U13F

EPM240T

U13F

EPM240T

VCCINT

VCCIO1

VCCIO2

VCCIO1

VCCIO2

GND 10

GND 11

GND 32

GND 46

GND 60

GND 93

GND 65

GND 79

C34

22uF

1210

16V

C34

22uF

1210

16V

C42

0.01uF

C42

0.01uF

C41

1uF

16V

C41

1uF

16V

C53

0.1uF

C53

0.1uF

U12

LT1763CS8

U12

LT1763CS8

OUT 1

SEN 2

GND

BYP 4

SHDN

GND

C43

10uF

6.3V

C43

10uF

6.3V

R44

C45

0.01uF

C45

0.01uF

U11

LT1763CS8-1.8

U11

LT1763CS8-1.8

OUT 1

SEN 2

GND

BYP 4

SHDN

GND

R36

E4E4

U13E

EPM240T

U13E

EPM240T

GCLK0

GCLK1

GCLK2

GCLK3

DEV_OE

DEV_CLRN

TMS

TDI

TCK

TDO

C46

10uF

6.3V

C46

10uF

6.3V

E8E8

U13D

EPM240T

U13D

EPM240T

IO76 76

IO77 77

IO78 78

IO81 81

IO82 82

IO83 83

IO84 84

IO85 85

IO86 86

IO87 87

IO88 88

IO89 89

IO90 90

IO91 91

IO92 92

IO95 95

IO96 96

IO97 97

IO98 98

IO99 99

IO100 100

R34

10k

0402

R34

10k

0402

C52

0.1uF

C52

0.1uF

R37

U13C

EPM240T

U13C

EPM240T

IO51 51

IO52 52

IO53 53

IO54 54

IO55 55

IO56 56

IO57 57

IO58 58

IO61 61

IO66 66

IO67 67

IO68 68

IO69 69

IO70 70

IO71 71

IO72 72

IO73 73

IO74 74

IO75 75

C39

0.01uF

C39

0.01uF

R41

2.80k

R41

2.80k

JP5JP5

C38

1uF

16V

C38

1uF

16V

U13B

EPM240T

U13B

EPM240T

IO26 26

IO27 27

IO28 28

IO29 29

IO30 30

IO33 33

IO34 34

IO35 35

IO36 36

IO37 37

IO38 38

IO39 39

IO40 40

IO41 41

IO42 42

IO47 47

IO48 48

IO49 49

IO50 50

R43

1.54k

R43

1.54k

U15

LT1763CS8-5

U15

LT1763CS8-5

OUT 1

SEN 2

GND

BYP 4

SHDN

GND

C40

10uF

6.3V

C40

10uF

6.3V

E3E3

C51

0.1uF

C51

0.1uF

JP2X5/100

10 9

C35

1uF

16V

C35

1uF

16V

R38

E5E5

C54

0.1uF

C54

0.1uF

R40

C36

0.01uF

C36

0.01uF

C48

0.1uF

C48

0.1uF

U13A

EPM240T

U13A

EPM240T

IO1 1

IO2 2

IO3 3

IO4 4

IO5 5

IO6 6

IO7 7

IO8 8

IO15 15

IO16 16

IO17 17

IO18 18

IO19 19

IO20 20

IO21 21

C44

1uF

16V

C44

1uF

16V

R39

10k

R39

10k

R35

300

R35

300

E7E7

C50

0.1uF

C50

0.1uF

dc1805af

DEMO MANUAL DC1805A

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 0412 • 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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