LTC2327 [Linear]

18-Bit/16-Bit,1Msps/500ksps/250ksps True Bipolar Low Power, Single Supply ADCs;


型号：	LTC2327
厂家：	Linear
描述：	18-Bit/16-Bit,1Msps/500ksps/250ksps True Bipolar Low Power, Single Supply ADCs
文件：	总12页 (文件大小：8260K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DEMO MANUAL DC1908A

LTC2338/LTC2337/LTC2336/

LTC2328/LTC2327/LTC2326

18-Bit/16-Bit,1Msps/500ksps/250ksps

True Bipolar Low Power, Single Supply ADCs

DESCRIPTION

The LTC^®2338/LTC2337/LTC2336/LTC2328/LTC2327/

LTC2326 are true bipolar, low power, low noise ADCs

with serial outputs that can operate from a single 5V

supply. The following text refers to the LTC2338-18 but

applies to all parts in the family, the only difference being

the maximum sample rates and the number of bits. The

LTC2338-18 supports a 2ꢀ.ꢁ8V fully differential input

range with a 1ꢀꢀdB SNR, consumes only 5ꢀmW and

achieves ꢁLSB INL max with no missing codes at 18

bits. The DC19ꢀ8A demonstrates the DC and AC perfor-

mance of the LTC2338-18 in conjunction with the DC59ꢀ

QuikEval™ and DC718 PScope™ data collection boards.

Use the DC59ꢀ 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

demonstration circuit 19ꢀ8A is intended to demonstrate

recommended grounding, component placement and

selection, routing and bypassing for this ADC. Suggested

driver circuits for the analog inputs will be presented.

Design files for this circuit board are available at

http://www.linear.com/demo or scan the QR code on

the back of the board.

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

QuikEval, PScope are trademarks of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

BOARD PHOTO

-16V

GND

+16V

100MHz

Max

3.3Vpp

DC718

AIN+

10.ꢀ2V

AIN-

10.ꢀ2V

TO DC590

Figure 1. DC1908A Connection Diagram

dc1908af

DEMO MANUAL DC1908A

ASSEMBLY OPTIONS

Table 1. DC1908A Assembly Options

ASSEMBLY VERSION U1 PART NUMBER MAX CONVERSION RATE # OF BITS MAX CLK FREQUENCY

AIN+ RANGE

1ꢀ.2ꢁV

AIN– RANGE

1ꢀ.2ꢁV

DC19ꢀ8A-A

DC19ꢀ8A-B

DC19ꢀ8A-C

DC19ꢀ8A-D

DC19ꢀ8A-E

DC19ꢀ8A-F

DC19ꢀ8A-G

DC19ꢀ8A-H

DC19ꢀ8A-I

LTC2338CMS-18

LTC2337CMS-18

LTC2336CMS-18

LTC2328CMS-18

LTC2327CMS-18

LTC2326CMS-18

LTC2328CMS-16

LTC2327CMS-16

LTC2326CMS-16

1Msps

5ꢀꢀksps

25ꢀksps

1Msps

62MHz

31MHz

1ꢀ.2ꢁV

15.5MHz

62MHz

1ꢀ.2ꢁV

Grounded Internally

5ꢀꢀksps

25ꢀksps

1Msps

31MHz

15.5MHz

5ꢀMHz

5ꢀꢀksps

25ꢀksps

25MHz

12.5MHz

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 de-

fault connections configure the ADC to use the internal

reference. The analog input is DC coupled. Connect the

DC19ꢀ8A to a DC718 USB high speed data collection

board using connector P1. Then, connect the DC718 to

a host PC with a standard USB A/B cable. Apply 16V

to the indicated terminals. Then apply a low jitter signal

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 DC19ꢀ8A and

configure itself automatically.

Click the Collect button (See Figure ꢁ) to begin acquiring

data. The Collect button then changes to Pause, which

can be clicked to stop data acquisition.

source to AIN+ (Jꢁ). Connect a low jitter 62MHz 3.3V

P-P

sine wave or square wave to CLK IN (J1). Note that CLK

IN has a 5ꢀΩ termination resistor to ground.

Run the PScope software (Pscope.exe version K72 or

later) supplied with the DC718 or download it from www.

linear.com/software.

DC590 SETUP

IMPORTANT!To avoiddamagetotheDC1908AorDC590,

make sure that VCCIO (JP6) of the DC590 is set to 3.3V

before connecting the DC590 to the DC1908A.

with a standard USB A/B cable. Connect the DC19ꢀ8A to a

DC59ꢀUSBserialcontrollerusingthesupplied1ꢁ-conduc-

tor ribbon cable. Apply a signal source to AIN+ or AIN+

and AIN– depending on how the DC19ꢀ8A is configured.

Run the QuikEval software supplied with the DC59ꢀ or

download it from www.linear.com/software. The correct

control panel will be loaded automatically. Click the COL-

LECT button (See Figure 5) to begin reading the ADC.

To use the DC59ꢀ with the DC19ꢀ8A, it is necessary to

apply 16V and ground to the +16V, –16V and GND ter-

minals or disable amplifier U1ꢀ by moving R32 and R35

to R31 and R38 respectively. Disabling U1ꢀ will require

that both AIN+ and AIN– (J6) be driven with a low output

impedance signal source. Connect the DC59ꢀ to a host PC

dc1908af

DEMO MANUAL DC1908A

DC1908A SETUP

DC Power

appliedatAIN+andfeedittotheADCasshowninFigure3.

To bypass the single-ended-to-differential converter or

buffer, disable amplifier U1ꢀ by moving R32 and R35 to

R31 and R38 respectively. Disabling U1ꢀ will require that

both AIN+ and AIN– be driven with a low output imped-

ance signal source.

The DC19ꢀ8A requires 16VDC and draws approximately

1ꢀꢀmA from the positive supply. Most of this supply cur-

rent is consumed by the CPLD, op amps, regulators and

discrete logic on the board. The +16VDC input voltage

powers the ADC through LT1763 regulators which pro-

vide protection against accidental reverse bias. Additional

regulators provide power for the CPLD and op amps. See

Figure 1 for connection details.

Data Output

Parallel data output from this board (ꢀV to 3.3V default),

if not connected to the DC718, can be acquired by a logic

analyzer, and subsequently imported into a spreadsheet,

or mathematical package depending on what form of

digital signal processing is desired. Alternatively, the

data can be fed directly into an application circuit. Use

CLKOUT (Pin 3) of P1 to latch the data. The data can be

latched using either edge of this signal. The data output

signal levels at P1 can also be reduced to ꢀV to 2.5V if

the application circuit cannot tolerate the higher voltage.

This is accomplished by moving the VCCIO jumper (JP3)

to the 2.5V position.

Clock Source

You must provide a low jitter 3.3V sine or square wave

P-P

to CLK IN. The clock input is AC coupled so the DC level

of the clock signal is not important. A clock source like

the Rohde & Schwarz SMB1ꢀꢀA 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 5ꢀ:1 for 16-

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

recommended that the 5ꢀΩ terminator (R5) be removed.

Slow rising edges may compromise the SNR of the con-

verter in the presence of high amplitude higher frequency

input signals.

Reference

The default reference is the LTC2338-18 ꢁ.ꢀ96V internal

reference. TheLTC66555Vexternalreferencecanbeused

by adding R37 and moving the REF jumper (JP2) to the

EXT position. This will increase the input range at AIN+

and AIN– to 12.5V. Also, an external reference can be

used by removing R37 and applying a reference voltage

to the VREF (E3) terminal with the REF jumper in the EXT

position. If an external reference is used it must settle

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

Analog Input

The default setup for the DC19ꢀ8A requires that only AIN+

is driven. Versions A, B and C of the DC19ꢀ8A convert the

single-ended signal at AIN+ to a fully-differential signal

that is then fed to the ADC as shown in Figure 2. Single-

ended versions D, E, F, G, H and I simply buffer the signal

analog input range for an external reference is 2.5 ꢂ V

REF

Figure 2. Single-Ended to Differential Converter

Figure 3. Single-Ended Buffer

dc1908af

DEMO MANUAL DC1908A

DC1908A SETUP

Data Collection

input signal level is approximately –1dBFS. A typical FFT

obtained with DC19ꢀ8A is shown in Figure ꢁ. Note that

to calculate the real SNR, the signal level (F1 amplitude =

–1.ꢀ3ꢀdB) has to be added back to the SNR that PScope

displays. With the example shown in Figure ꢁ this means

that the actual SNR would be 99.5ꢁdB instead of the

98.51dB that PScope displays. Taking the RMS sum of the

recalculated SNR and the THD yields a SINAD of 99.27dB

which is fairly close to the typical number for this ADC.

For SINAD, THD or SNR testing a low noise, low distortion

generator such as the Stanford Research DS36ꢀ should

be used. A low jitter RF oscillator such as the Rohde &

SchwarzSMB1ꢀꢀAisusedastheclocksource. Thisdemo

board is tested in house by attempting to duplicate the

FFT plot shown on the front page of the LTC2338-18 data

sheet. This involves using a 62MHz clock source, along

with a sinusoidal generator at a frequency of 2.ꢀkHz. The

Figure 4. DC1908A PScope Screen Shot

dc1908af

DEMO MANUAL DC1908A

DC1908A SETUP

and routing of the various components associated with

the ADC. Here are some things to remember when lay-

ing out a board for the LTC2338-18. A ground plane is

necessarytoobtainmaximumperformance.Keepbypass

capacitors as close to supply pins as possible. Use indi-

vidual low impedance returns for all bypass capacitors.

Use of a symmetrical layout around the analog inputs will

minimize the effects of parasitic elements. Shield analog

input traces with ground to minimize coupling from other

traces. Keep traces as short as possible.

There are a number of scenarios that can produce mis-

leading results when evaluating an ADC. One that is

common is feeding the converter with a frequency, that

is a sub-multiple of the sample rate, and which will only

exercise a small subset of the possible output codes.

The proper method is to pick an M/N frequency for the

input sine wave frequency. N is the number of samples

in the FFT. M is a prime number between one and N/2.

Multiply M/N by the sample rate to obtain the input sine

wave frequency. Another scenario that can yield poor

results is if you do not have a signal generator capable of

ppm frequency accuracy or if it cannot be locked to the

clock frequency. You can use an FFT with windowing to

reduce the “leakage” or spreading of the fundamental, to

get a close approximation of the ADC performance. If an

amplifier or clock source with poor phase noise is used,

the windowing will not improve the SNR.

Component Selection

When driving a low noise, low distortion ADC such as

the LTC2338-18, 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. Because of their low voltage coefficients,

to further reduce distortion NPO or silver mica capacitors

should be used. Any buffer used to drive the LTC2338-18

should have low distortion, low noise and a fast settling

time such as the LT1ꢁ69.

Layout

As with any high performance ADC, this part is sensitive

to layout. The area immediately surrounding the ADC on

theDC19ꢀ8Ashouldbeusedasaguidelineforplacement,

dc1908af

DEMO MANUAL DC1908A

DC1980A SETUP

Figure 5. DC1908A QuikEval Screen Shot

DC1980A JUMPERS

Definitions

JP3 – VCCIO sets the output levels at P1 to either 3.3V

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

default setting.

JP1 – EEPROM For Factory use only. Should be left in

the WP position.

JP2 – REF selects whether the LTC2338-18 internal refer-

ence or an external reference voltage is used. The default

setting is internal.

dc1908af

DEMO MANUAL DC1908A

PARTS LIST

ITEM QTY REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

C1, C2, C3, Cꢁ, C5, C7, C1ꢀ, C13, C1ꢁ,

C15, C16, C56

CAP., X7R, ꢀ.1µF, 16V 1ꢀ% ꢀ6ꢀ3

NIC, NMCꢀ6ꢀ3X7R1ꢀꢁK16TRPF

ꢀ

ꢁ

ꢀ

C6, C9, C2ꢁ, C26, C29, Cꢁ8

CAP., X5R, 1ꢀµF, 6.3V 2ꢀ% ꢀ6ꢀ3

CAP., X7R, 1µF, 16V 1ꢀ% ꢀ6ꢀ3

CAP., X5R, 1ꢀµF, 1ꢀV 2ꢀ% ꢀ6ꢀ3

CAP., X7R, ꢀ.1µF, 25V 2ꢀ% ꢀ6ꢀ3

CAP., OPT, ꢀ6ꢀ3

NIC, NMCꢀ6ꢀ3X5R1ꢀ6M6.3TRPFꢁKF

NIC, NMCꢀ6ꢀ3X7R1ꢀ5K16TRPF

SAMSUNG, CL1ꢀA1ꢀ6MP8NNNC

TDK, C16ꢀ8X7R1E1ꢀꢁM

C8, Cꢁ5

ꢁ

C11

C12, C17, Cꢁ1, Cꢁ3, C57, C6ꢀ

C18, Cꢁ2, Cꢁ7, C58, C61

OPTION

C19

CAP., OPT, ꢀ8ꢀ5

OPTION

C2ꢀ

CAP., X7R, ꢁ7µF, 1ꢀV 1ꢀ% 121ꢀ

CAP., X5R, 22µF, 25V 2ꢀ% 121ꢀ

CAP., X7R, 1µF, 25V 1ꢀ% ꢀ6ꢀ3

CAP., X7R, ꢀ.ꢀ1µF, 6.3V 1ꢀ% ꢀ6ꢀ3

MURATA, GRM32ER71Aꢁ76KE15L

MURATA, GRM32ER61E226ME15

TDK, C16ꢀ8X7R1E1ꢀ5K

C21

1ꢀ

1ꢁ

2ꢀ

2ꢁ

3ꢀ

3ꢁ

ꢁꢀ

ꢁ1

ꢁ2

ꢁ3

ꢁꢁ

C22, C25, C28, Cꢁꢁ, C51, C5ꢁ

C23, C27, C3ꢀ

MURATA, GRM188R7ꢀJ1ꢀ3KAꢀ1D

NIC, NMCꢀꢁꢀ2X7R1ꢀꢁK16TRPF

OPTION

C31, C32, C33, C3ꢁ, C35, C36, C37, C38 CAP., X7R, ꢀ.1µF, 16V 1ꢀ% ꢀꢁꢀ2

C39, Cꢁꢀ

CAP., OPT, 12ꢀ6

Cꢁ6

CAP., X5R, 2.2µF, 1ꢀV 1ꢀ% ꢀ6ꢀ3

CAP., NPꢀ, 1ꢀꢀpF, 25V 1ꢀ% ꢀ6ꢀ3

CAP., X7R, ꢀ.ꢀ1µF, 25V 1ꢀ% ꢀ6ꢀ3

CAP., X5R, 1ꢀµF, 25V 1ꢀ% ꢀ8ꢀ5

CAP., X5R, 1µF, 5ꢀV 1ꢀ% ꢀ6ꢀ3

TEST POINT, TURRET, ꢀ.ꢀ61

TEST POINT, TURRET, ꢀ.ꢀ9ꢁ, PBF

3-PIN SINGLE ROW HEADER, .1ꢀꢀ

CONNECTOR, BNC

MURATA, GRM188R61A225KE3ꢁD

AVX, ꢀ6ꢀ33A1ꢀ1KATꢁA

Cꢁ9

C5ꢀ

MURATA, GRM188R71E1ꢀ3KAꢀ1D

MURATA, GRM21BR61E1ꢀ6KA73L

TDK, C16ꢀ8X5R1H1ꢀ5KT

MILL-MAX, 23ꢀ8-2-ꢀꢀ-8ꢀ-ꢀꢀ-ꢀꢀ-ꢀ7-ꢀ

MILL- MAX, 25ꢀ1-2-ꢀꢀ-8ꢀ-ꢀꢀ-ꢀꢀ-ꢀ7-ꢀ

SAMTEC, TSW-1ꢀ3-ꢀ7-L-S

CONNEX, 112ꢁꢀꢁ

C52, C53

C55, C59

E1, E2, Eꢁ, E5, E9

E3, E6, E7, E8

JP1, JP2, JP3

J1, Jꢁ, J6

HEADER, 2X7, ꢀ.ꢀ79"

MOLEX, 87831-1ꢁ2ꢀ

HEADER, 2X5, ꢀ.1ꢀꢀ"

SAMTEC, TSW-1ꢀ5-ꢀ7-L-D

KEYSTONE, 8831 (SNAP ON)

SAMTEC, TSW-12ꢀ-ꢀ7-L-D

PANASONIC, ERJ-3GEYJ33ꢀV

YAGEO, RCꢀ6ꢀ3JR-ꢀ71KL

VISHAY, CRCW12ꢀ6ꢁ9R9FKEA

YAGEO, RCꢀ6ꢀ3JR-ꢀ71KL

PANASONIC, ERJ-3GEYꢀRꢀꢀV

PANASONIC, ERJ-3EKFꢁ991V

OPTION

MH1, MH2, MH3, MHꢁ

STANDOFF, NYLON ꢀ.25"

CONNECTOR, ꢁꢀ PINS, SMT

R1, R3, Rꢁ, R8

RES., CHIP, 33Ω, 1/1ꢀW, 5% ꢀ6ꢀ3

RES., CHIP, 1k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, ꢁ9.9Ω, 1/ꢁW, 1% 12ꢀ6

RES., CHIP, 1k, 1/1ꢀW, 5% ꢀ6ꢀ3

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RES., CHIP, ꢁ.99k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, OPT, ꢀ6ꢀ3

R2, R6, R19, R2ꢁ, R29, Rꢁ3, Rꢁ5

R7, R13

R9, R1ꢁ, R32, R33, R36, R39

R1ꢀ, R11, R12, Rꢁꢀ

R15, R31, R3ꢁ, R37, R38

R17

RES., CHIP, 2k, 1/1ꢀW, 5% ꢀ6ꢀ3

RES., CHIP, 2ꢁ9Ω, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 1k, 1/16W, 5% ꢀꢁꢀ2

RES., CHIP, 1ꢀk, 1/16W, 5% ꢀ6ꢀ3

RES., CHIP, 1.69k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 1.5ꢁk, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 2.8k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 11.5k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 1ꢀk, 1/16W, 5% ꢀꢁꢀ2

RES., CHIP, 6.19k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 33Ω, 1/16W, 5% ꢀꢁꢀ2

PANASONIC, ERJ-3GEYJ2ꢀ2V

YAGEO, RCꢀ6ꢀ3FR-ꢀ72ꢁ9RL

YAGEO, RCꢀꢁꢀ2JR-ꢀ71KL

AAC, CR16-1ꢀ3JM

R18

R2ꢀ, R22, R23

R21

R25

PANASONIC, ERJ-3EKF1691V

YAGEO, RCꢀ6ꢀ3FR-ꢀ71K5ꢁL

YAGEO, RCꢀ6ꢀ3FR-ꢀ72K8L

YAGEO, RCꢀ6ꢀ3FR-ꢀ711K5L

AAC, CRꢀ5-1ꢀ3JM

R26

R27

R28, Rꢁ2

R3ꢀ

Rꢁ6

Vishay, CRCWꢀ6ꢀ36K19FKEA

PANASONIC, ERJ-2GEJ33ꢀX

Rꢁ7

dc1908af

DEMO MANUAL DC1908A

PARTS LIST

ITEM QTY REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

FAIRCHILD, NC7SVUꢀꢁP5X

ꢁ5

U2, Uꢁ

IC, UNBUFFERED INVERTER, SC7ꢀ-5

IC, D FLIP-FLOP, US8

ꢁ6

ON SEMI., NL17SZ7ꢁUSG

ꢁ7

U5, U13, U16

IC, MICROPOWER REGULATOR, SO-8

IC, SINGLE SPST BUS SWITCH, SC7ꢀ-5

IC, SERIAL EEPROM, TSSOP

IC, UHS INVERTER, SC7ꢀ-5

LINEAR TECH., LT1763CS8#PBF

FAIRCHILD, NC7SZ66P5X

ꢁ8

ꢁ9

MICROCHIP, 2ꢁLCꢀ2ꢁ-I/ST

5ꢀ

U8, U9

FAIRCHILD, NC7SZꢀꢁP5X

U1ꢀ

IC, DUAL OP-AMP

LINEAR TECH., LT1ꢁ69CS8#PBF

ALTERA, EPM2ꢁꢀGT1ꢀꢀC5N

LINEAR TECH., LT1763CS8-1.8#PBF

LINEAR TECH., LT1763CS8-5#PBF

LINEAR TECH., LTC6655BHMS8-5#PBF

U11

IC, MAX II CPLD, TQFP1ꢀꢀ

U12

IC, MICROPOWER REGULATOR, SO-8

IC, VOLTAGE REFERENCE, MSOP

5ꢁ

U1ꢁ

U15

U17

IC, MICROPOWER NEG. REGULATOR, SOT-23 LINEAR TECH., LT196ꢁES5-SD#PBF

XJP1, XJP2, XJP3

SHUNT, ꢀ.1ꢀꢀ

SAMTEC, SNT-1ꢀꢀ-BK-G

STENCIL 19ꢀ8A

STENCIL SET (TOP & BOTTOM)

FAB, PRINTED CIRCUIT BOARD

DEMO CIRCUIT 19ꢀ8A (REV2)

DC1908A-A

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2338CMS-18

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RES., CHIP, ꢁ.99k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 3ꢀꢀΩ, 1/16W, 5% ꢀꢁꢀ2

FAB, PRINTED CIRCUIT BOARD

PANASONIC, ERJ-3GEYꢀRꢀꢀV

PANASONIC, ERJ-3EKFꢁ991V

YAGEO, RCꢀꢁꢀ2JR-ꢀ73ꢀꢀRL

DEMO CIRCUIT 19ꢀ8A

DC1908A-B

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2337CMS-18

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RES., CHIP, ꢁ.99k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 3ꢀꢀΩ, 1/16W, 5% ꢀꢁꢀ2

FAB, PRINTED CIRCUIT BOARD

PANASONIC, ERJ-3GEYꢀRꢀꢀV

PANASONIC, ERJ-3EKFꢁ991V

YAGEO, RCꢀꢁꢀ2JR-ꢀ73ꢀꢀRL

DEMO CIRCUIT 19ꢀ8A

DC1908A-C

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2336CMS-18

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RES., CHIP, ꢁ.99k, 1/1ꢀW, 1% ꢀ6ꢀ3

RES., CHIP, 3ꢀꢀΩ, 1/16W, 5% ꢀꢁꢀ2

FAB, PRINTED CIRCUIT BOARD

PANASONIC, ERJ-3GEYꢀRꢀꢀV

PANASONIC, ERJ-3EKFꢁ991V

YAGEO, RCꢀꢁꢀ2JR-ꢀ73ꢀꢀRL

DEMO CIRCUIT 19ꢀ8A

DC1908A-D

ꢁ

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2328CMS-18

PANASONIC, ERJ-3GEYꢀRꢀꢀV

OPTION

R16

R35

Rꢁ1

RE., CHIP, OPT, ꢀ6ꢀ3

OPTION

dc1908af

DEMO MANUAL DC1908A

PARTS LIST

ITEM QTY REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

Rꢁꢁ

RES., CHIP, 3ꢀꢀΩ, 1/16W, 5% ꢀꢁꢀ2

FAB, PRINTED CIRCUIT BOARD

YAGEO, RCꢀꢁꢀ2JR-ꢀ73ꢀꢀRL

DEMO CIRCUIT 19ꢀ8A

DC1908A-E

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2327CMS-18

PANASONIC, ERJ-3GEYꢀRꢀꢀV

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RE., CHIP, OPT, ꢀ6ꢀ3

OPTION

RES., CHIP, 3ꢀꢀΩ, 1/16W, 5% ꢀꢁꢀ2

FAB, PRINTED CIRCUIT BOARD

YAGEO, RCꢀꢁꢀ2JR-ꢀ73ꢀꢀRL

DEMO CIRCUIT 19ꢀ8A

DC1908A-F

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2326CMS-18

PANASONIC, ERJ-3GEYꢀRꢀꢀV

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RE., CHIP, OPT, ꢀ6ꢀ3

OPTION

RES., CHIP, 3ꢀꢀΩ, 1/16W, 5% ꢀꢁꢀ2

FAB, PRINTED CIRCUIT BOARD

YAGEO, RCꢀꢁꢀ2JR-ꢀ73ꢀꢀRL

DEMO CIRCUIT 19ꢀ8A

DC1908A-G

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2328CMS-16

PANASONIC, ERJ-3GEYꢀRꢀꢀV

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RE., CHIP, OPT, ꢀ6ꢀ3

OPTION

RES., CHIP, ꢀꢁꢀ2

OPTION

FAB, PRINTED CIRCUIT BOARD

DEMO CIRCUIT 19ꢀ8A

DC1908A-H

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2327CMS-16

PANASONIC, ERJ-3GEYꢀRꢀꢀV

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

ꢁ

RE., CHIP, OPT, ꢀ6ꢀ3

OPTION

RES., CHIP, ꢀꢁꢀ2

OPTION

FAB, PRINTED CIRCUIT BOARD

DEMO CIRCUIT 19ꢀ8A

DC1908A-I

ꢁ

ꢀ

GENERAL BOM

DC19ꢀ8A

LOW POWER, LOW NOISE ADC

RES., CHIP, ꢀΩ, 1/1ꢀW, ꢀ6ꢀ3

RE., CHIP, OPT, ꢀ6ꢀ3

LINEAR TECH., LTC2326CMS-16

PANASONIC, ERJ-3GEYꢀRꢀꢀV

OPTION

R16

R35

Rꢁ1

Rꢁꢁ

RE., CHIP, OPT, ꢀ6ꢀ3

OPTION

RES., CHIP, ꢀꢁꢀ2

OPTION

FAB, PRINTED CIRCUIT BOARD

DEMO CIRCUIT 19ꢀ8A

dc1908af

DEMO MANUAL DC1908A

SCHEMATIC DIAGRAM

dc1908af

DEMO MANUAL DC1908A

SCHEMATIC DIAGRAM

dc1908af

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.

DEMO MANUAL DC1908A

DEMONSTRATION BOARD IMPORTANT NOTICE

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

Thisdemonstrationboard(DEMOBOARD)kitbeingsoldorprovidedbyLinearTechnologyisintendedforuseforENGINEERINGDEVELOPMENT

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 3ꢀ 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

163ꢀ McCarthy Blvd.

Milpitas, CA 95ꢀ35

dc1908af

LT 0713 • PRINTED IN USA

LinearTechnology Corporation

163ꢀ McCarthy Blvd., Milpitas, CA 95ꢀ35-7ꢁ17

●

 LINEAR TECHNOLOGY CORPORATION 2013

(ꢁꢀ8) ꢁ32-19ꢀꢀ FAX: (ꢁꢀ8) ꢁ3ꢁ-ꢀ5ꢀ7 www.linear.com

LTC2327 [Linear]

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