Linear Technology DC2073A Series Quick setup guide

dc2073af

DEMO MANUAL DC2073A

DESCRIPTION

LTC1799, LTC6900, LTC6905,

LTC6905-XXX, LTC6906, LTC6907

LTC6908 SOT23 Silicon Oscillators

DC2073Ademoboardfeatures Linear Technology'sSOT23

packaged silicon oscillators. The DC2073A demo board is

available in eleven different options; DC2073A-A through

DC2073A-K. These eleven options provide for the evalu-

ation of resistor-set oscillator ICs and fixed frequency

ICs (Table1).

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

Technology Corporation. All other trademarks are the property of their respective owners.

Design files for this circuit board are available at

http://www.linear.com/demo

Table 1. Resistor-Set Oscillator ICs and Maximum Frequency Error at TA= 25°C

PART NUMBER, BOARD ASSEMBLY FREQUENCY PROGRAM METHOD DESCRIPTION

LT C

6905, DC2073A-A Resistor Programmable 17.225MHz ≤ fOSC ≤ 170MHz, ±1.4% at V+ = 2.7V

and ±2.2% at V+= 5V

LTC1799, DC2073A-B Resistor Programmable 5kHz ≤ fOSC ≤ 10MHz, ±1.5% at V+ = 3V and

±1.5% at V+= 5V (Up to 20MHz)

LTC6900, DC2073A-C Resistor Programmable 5kHz ≤ fOSC ≤ 10MHz, ±1.5% at V+ = 3V and

±1.5% at V+= 5V (Up to 20MHz)

LTC6905-133, DC2073A-D Three Fixed Frequencies Set by Three-State Input fOSC = 133MHz, 66.7MHz and 33.5MHz,

±1.0% at V+= 3V and ±1.5% Typical at V+= 5V

LTC6905-100, DC2073A-E Three Fixed Frequencies Set by Three-State Input fOSC = 100MHz, 50MHz and 25MHz,

±1.0% at V+= 3V and ±1.5% Typical at V+= 5V

LTC6905-96, DC2073A-F Three Fixed Frequencies Set by Three-State Input fOSC = 96MHz, 48MHz and 24MHz,

±1.0% at V+= 3V and ±1.5% Typical at V+= 5V

LTC6905-80, DC2073A-G Three Fixed Frequencies Set by Three-State Input fOSC = 80MHz, 40MHz and 20MHz,

±1.0% at V+= 3V and ±1.5% typical at V+= 5V

LTC6906, DC2073A-H Resistor Programmable 10kHz ≤ fOSC ≤ 1MHz, ±0.5% at V+= 2.7V to 3.6V

and ±0.7% at V+= 2.25V

LTC6907, DC2073A-I Resistor Programmable 400kHz ≤ fOSC ≤ 4MHz, ±0.65% at V+= 3V to 3.6V

LTC6908-1, DC2073A-J Spread Spectrum Modulation, Complementary

Outputs (0°/180°) Resistor Programmable

250kHz ≤ fOSC ≤ 5MHz, ±1.5% at V+= 2.7V and

±2.0% at V+= 5V

LTC6908-2, DC2073A-K Spread Spectrum Modulation, Quadrature

Outputs (0°/90°) Resistor Programmable

250kHz ≤ fOSC ≤ 5MHz, ±1.5% at V+= 2.7V and

±2.0% at V+= 5V

dc2073af

DEMO MANUAL DC2073A

QUICK START PROCEDURE

Test Equipment:

1. A single 3V power supply.

2. An oscilloscope with a bandwidth of at least 5x fOSC.

(For example, if fOSC = 100MHz then use a 500MHz

oscilloscope).

3. A screwdriver to adjust the potentiometer.

Basic Test Procedure:

1. Connect power supply to V+and GND, turrets E4 and

E5.

2. Connect oscilloscope probe to OUT1 and GND.

Note: The ground lead of an oscilloscope probe has a

series inductance that can generate a resonant circuit

with the probe's capacitance. Probe resonance adds

transient peaks and ringing on a high speed wave-

form. Reliable probing of the high frequency LTC6905

and LTC6905-XXX (with corresponding demo boards

DC2073A-A, -D, -E, -F or -G), must use a very short

connectionofthe

oscilloscopeprobegroundtotheboard

GND (see probe tip picture in Figure1 Test Setup).

3. Set the JP1 jumper to the N divider position for the

desired frequency shown on Table2.

4. Turn on supply.

5. The oscilloscope display shows a 3V squarewave

(0V to 3V).

6. For the resistor-set ICs (DC2073A-A, -B, -C, -H, -I, -J

or -K) turn the RPOT potentiometer for the desired fre-

quency. (The frequency adjustment is very coarse when

the potentiometer is turned near the fully clockwise or

counter-clockwise position).

Verify Oscillator Accuracy

The fOSC accuracy of the resistor-set ICs (DC2073A-A, -B,

-C, -H, -I, -J or -K), can be verified by setting RSET to the

exact value from the fOSC equation shown in Table 2. For

the DC2073A-A, -B, -C, -J, -K, RSET = RPOT + RSET2.

RSET1 and RSET2 are never installed on the same board.

Connecting an ohmmeter across RPOT and RSET1 or

RSET2 forces current into the IC set pin (Pin 3 or 4) and

causes an error in the ohmmeter reading. The RS resistor

is in series with RPOT and equal to RSET1 or RSET2 and

the equivalent RSET = RPOT + RS.

Procedure to Verify Oscillator Accuracy

a. Calculate RSET for the desired frequency (RSET in Table 2).

b. Removethepower supply leadsfrom DC2073A and con-

nect an ohmmeter from POT (E6) to V+(DC2073A-A,

-B, -C, -J or -K) or GND (DC2073A-H or-I).

C. Adjust RPOT for the exact value of RSET needed.

Note: If the potentiometer is turned near the fully clock-

wiseorcounter-clockwisepositiontheRPOTadjustment

may be too coarse for setting an exact RSET value. In

addition, for a frequency adjustment near the upper or

lower fOSC range, RSET may be greater or less than the

default DC2073A RPOT + RSET1 or RSET2 value, in this

case the RSET1 or RSET2 resistor must be removed

and replaced with a lower or higher value.

dc2073af

DEMO MANUAL DC2073A

QUICK START PROCEDURE

Figure 1. Test Setup

dc2073af

DEMO MANUAL DC2073A

QUICK START PROCEDURE

Table 2. fOSC Frequency and N Divider Setting

LTC6905, DC2073A-A

fOSC =168.5MHz •10kΩ

RSET

+1.5MHZ









•1

N, RSET =168.5MHz •10kΩ

N• fOSC –1.5MHz

N = 1 (JP1 to V+), 68.9MHz ≤ fOSC ≤ 170MHz

N = 2 (JP1 to OPEN), 34.45MHz ≤ fOSC ≤ 85MHz

N = 4 (JP1 to GND), 7.225MHz ≤ fOSC ≤ 42.5MHz

LTC1799, DC2073A-B

fOSC =

10MHz

N•

10kΩ

SET

, RSET =

10MHz

OSC

•

10kΩ

N = 1 (JP1 to GND), 500kHz ≤ fOSC ≤ 20MHz

N = 10 (JP1 to OPEN), 50kHz ≤ fOSC ≤ 2MHz

N = 100 (JP1 to V+), 5kHz ≤ fOSC ≤ 200kHz

LTC6900, DC1073A-C

fOSC =

10MHz

N•

20kΩ

SET

, RSET =

10MHz

OSC

•

20kΩ

N = 1 (JP1 to GND), 500kHz ≤ fOSC ≤ 20MHz

N = 10 (JP1 to OPEN), 50kHz ≤ fOSC ≤ 2MHz

N = 100 (JP1 to V+), 5kHz ≤ fOSC ≤ 200kHz

LTC6905-133, DC2073A-D

fOSC =

133MHz

N = 1 (JP1 to V+), fOSC = 133MHz

N = 2 (JP1 to OPEN), fOSC = 66.7MHz

N = 4 (JP1 to GND), fOSC = 33.5MHz

LTC6905-10, DC2073A-E

fOSC =

100MHz

N = 1 (JP1 to V+), fOSC = 100MHz

N = 2 (JP1 to OPEN), fOSC = 50MHz

N = 4 (JP1 to GND), fOSC = 25MHz

LTC6905-96, DC2073A-F

fOSC =

96MHz

N = 1 (JP1 to V+), fOSC = 96MHz

N = 2 (JP1 to OPEN), fOSC = 48MHz

N = 4 (JP1 to GND), fOSC = 24MHz

LTC6905-80, DC2073A-G

fOSC =

80MHz

N = 1 (JP1 to V+), fOSC = 80MHz

N = 2 (JP1 to OPEN), fOSC = 40MHz

N = 4 (JP1 to GND), fOSC = 20MHz

LTC6906, DC2073A-H

fOSC =

1MHz

N•

100kΩ

SET

, RSET =

1MHz

OSC

•

100kΩ

N = 1 (JP1 to GND), 0.1MHz ≤ fOSC ≤ 1MHz

N = 3 (JP1 to OPEN), 33kHz ≤ fOSC ≤ 333kHz

N = 10 (JP1 to V+), 10kHz ≤ fOSC ≤ 100kHz

LTC6907, DC2073A-I

fOSC =

4MHz

N•

50kΩ

RSET

, RSET =

4MHz

fOSC

•

50kΩ

N = 1 (JP1 to GND), 0.4MHz ≤ fOSC ≤ 4MHz

N = 3 (JP1 to OPEN), 133kHz ≤ fOSC ≤ 1.33MHz

N = 10 (JP1 to V+), 40kHz ≤ fOSC ≤ 400kHz

LTC6908-1, DC2073A-J

Complementary Outputs (0°/180°) without Modulation:

250kHz ≤ fOSC ≤ 5MHz, (JP1 to DIV/MOD)

fOSC =

10MHz

N•

10kΩ

SET

, RSET =

10MHz

OSC

•

10kΩ

Spread Spectrum Modulation Rate:

(JP1 to GND), fOSC/16

(JP1 to OPEN), fOSC/32

(JP1 to V+), fOSC/64

LTC6908-1, DC2073A-K

Quadrature Outputs (0˚/90˚) without Modulation:

250kHz ≤ fOSC ≤ 5MHz, (JP1 to DIV/MOD)

fOSC =

10MHz

N•

10kΩ

RSET

, RSET =

10MHz

fOSC

•

10kΩ

Spread Spectrum Modulation Rate:

(JP1 to GND), fOSC/16

(JP1 to OPEN), fOSC/32

(JP1 to V+), fOSC/64

dc2073af

DEMO MANUAL DC2073A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

General

1 2 C1,C2 Cap., Chip, X7R, 10µF, 10%, 16V, 1210 Murata, GRM32DR71C106KA01

2 1 C4 Cap., Chip, X7R, 1000pF, 10%, 16V, 0603 AVX, 0603YC102KAT

3 0 C7 OPT Cap., 0603, OPT

4 9 E1-E9 Testpoint, Turret, 0.064" Mill-Max, 2308-2-00-80-00-00-07-0

5 1 R01 Res., Chip, 49.9Ω, 1%, 0603 Vishay, CRCW060349R9FKEA

6 1 JP1 Headers, Dbl. Row 2 x 4 2mm Ctrs Samtec TMM-104-02-L-D

7 1 XJP1 Shunt

8 4 (STAND-OFF) Stand-Off, Nylon 0.5" Keystone, 8833 (Snap On)

DC2073A-A

1 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 20k Vishay, T93YA203KT20

2 2 RSET1, RS Res., Chip, 10k, 1% 0603 Vishay, CRCW060310K0FKEA

3 5 RJ1, RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

4 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

5 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

6 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC6905CS5

DC2073A-B

1 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 500k Vishay, T93YA504KT20

2 2 RSET1, RS Res., Chip, 4.99k, 1% 0603 Vishay, CRCW06034K99FKEA

3 5 RJ1, RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

4 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

5 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

6 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC1799CS5

DC2073A-C

1 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 500k Vishay, T93YA504KT20

2 2 RSET1, RS Res., Chip, 20K, 1% 0603 Vishay, CRCW060320K0FKEA

3 5 RJ1, RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

4 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

5 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

6 1 U1 Resistor set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC6900CS5

DC2073A-D

1 4 RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 VISHAY, CRCW06030000Z0EA

2 1 RE Res., Chip, 1k, 1% 0603 VISHAY, CRCW06031K0FKEA

3 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

4 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

5 1 U1 Resistor set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC6905CS5-133

DC2073A-E

1 4 RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

2 1 RE Res., Chip, 1k, 1% 0603 Vishay, CRCW06031K0FKEA

3 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

4 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

5 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC6905CS5-100

dc2073af

DEMO MANUAL DC2073A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC2073A-F

1 4 RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

2 1 RE Res., Chip, 1k, 1% 0603 Vishay, CRCW06031K0FKEA

3 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

4 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

5 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC6905CS5-96

DC2073A-G

1 4 RJ2, RJ3, RJ8, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

2 1 RE Res., Chip, 1k, 1% 0603 Vishay, CRCW06031K0FKEA

3 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

4 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

5 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 5-Lead Linear Tech., LTC6905CS5-80

DC2073A-H

1 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 500k Vishay, T93YA504KT20

2 2 RSET2, RS Res., Chip, 100k, 1% 0603 Vishay, CRCW0603100KFKEA

3 4 RJ4, RJ5, RJ6, RJ7 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

4 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 6-Lead Linear Tech., LTC6906CS6

DC2073A-I

2 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 500k Vishay, T93YA504KT20

3 2 RSET2, RS Res., Chip, 49.9k, 1% 0603 Vishay, CRCW060349K9FKEA

4 4 RJ4, RJ5, RJ6, RJ7 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

5 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 6-Lead Linear Tech., LTC6907CS6

DC2073A-J

1 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 500k Vishay, T93YA504KT20

2 2 RSET1, RS Res., Chip, 10k, 1% 0603 Vishay, CRCW060310K0FKEA

3 4 RJ1, RJ2, RJ3, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

4 1 R02 Res., Chip, 49.9k, 1%, 0603 Vishay, CRCW060349R9FKEA

5 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104JAT2A

6 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

7 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 6-Lead Linear Tech., LTC6908CS6-1

DC2073A-K

1 1 RPOT 3/8" Square Multiturn Cermet Trimmer, 500k Vishay, T93YA504KT20

2 2 RSET1, RS Res., Chip, 10K, 1% 0603 Vishay, CRCW060310K00FKEA

3 4 RJ1, RJ2, RJ3, RJ9 Res., Chip, 0Ω, 0603 Vishay, CRCW06030000Z0EA

4 1 R02 Res., Chip, 49.9k, 1%, 0603 Vishay, CRCW060349R9FKEA

5 1 C5 Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603 AVX, 0603YC104KAT2A

6 1 C6 Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603 AVX, 0603YC103KAT2A

7 1 U1 Resistor Set SOT-23 Oscillator, SOT23, 6-Lead Linear Tech., LTC6908CS6-2

dc2073af

DEMO MANUAL DC2073A

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

dc2073af

DEMO MANUAL DC2073A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

 LINEAR TECHNOLOGY CORPORATION 2013

LT 0813 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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.

LT C 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 LT C applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Analog Devices Inc.:

DC2073A-K

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