DC2073A - Demo Manual

DEMO MANUAL DC2073A
LTC1799, LTC6900, LTC6905,
LTC6905-XXX, LTC6906, LTC6907
LTC6908 SOT23 Silicon Oscillators
DESCRIPTION
DC2073A demo board features Linear Technology's SOT23
packaged silicon oscillators. The DC2073A demo board is
available in eleven different options; DC2073A-A through
DC2073A-K. These eleven options provide for the evaluation of resistor-set oscillator ICs and fixed frequency
ICs (Table1).
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 of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Table 1. Resistor-Set Oscillator ICs and Maximum Frequency Error at TA = 25°C
PART NUMBER, BOARD ASSEMBLY
FREQUENCY PROGRAM METHOD
DESCRIPTION
LTC 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
®
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DEMO MANUAL DC2073A
QUICK START PROCEDURE
Test Equipment:
Verify Oscillator Accuracy
1.A single 3V power supply.
1.Connect power supply to V+ and GND, turrets E4 and
E5.
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.
2.Connect oscilloscope probe to OUT1 and GND.
Procedure to Verify Oscillator Accuracy
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 waveform. 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
connection of the oscilloscope probe ground to the board
GND (see probe tip picture in Figure 1 Test Setup).
a. Calculate RSET for the desired frequency (RSET in Table 2).
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:
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).
b.Remove the power supply leads from DC2073A and connect 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 clockwise or counter-clockwise position the RPOT adjustment
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.
6. For the resistor-set ICs (DC2073A-A, -B, -C, -H, -I, -J
or -K) turn the RPOT potentiometer for the desired frequency. (The frequency adjustment is very coarse when
the potentiometer is turned near the fully clockwise or
counter-clockwise position).
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DEMO MANUAL DC2073A
QUICK START PROCEDURE
Figure 1. Test Setup
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DEMO MANUAL DC2073A
QUICK START PROCEDURE
Table 2. fOSC Frequency and N Divider Setting
LTC6905, DC2073A-A
 168.5MHz •10kΩ
 1
168.5MHz •10kΩ
fOSC = 
+1.5MHZ • , RSET =
R
N
N • fOSC – 1.5MHz


SET
LTC1799, DC2073A-B
fOSC =
10MHz 10kΩ
10MHz 10kΩ
•
,R =
•
N
RSET SET
fOSC
N
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
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
LTC6905-133, DC2073A-D
fOSC =
10MHz 20kΩ
10MHz 20kΩ
•
,R =
•
N
RSET SET
fOSC
N
fOSC =
133MHz
N
N = 1 (JP1 to GND), 500kHz ≤ fOSC ≤ 20MHz
N = 10 (JP1 to OPEN), 50kHz ≤ fOSC ≤ 2MHz
N = 100 (JP1 to V+), 5kHz ≤ fOSC ≤ 200kHz
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
100MHz
fOSC =
N
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
96MHz
fOSC =
N
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
80MHz
fOSC =
N
LTC6906, DC2073A-H
1MHz 100kΩ
1MHz 100kΩ
fOSC =
•
, RSET =
•
N
R
fOSC
N
SET
N = 1 (JP1 to V+), fOSC = 80MHz
N = 2 (JP1 to OPEN), fOSC = 40MHz
N = 4 (JP1 to GND), fOSC = 20MHz
LTC6907, DC2073A-I
4MHz 50kΩ
4MHz 50kΩ
fOSC =
•
, RSET =
•
N
R
fOSC
N
SET
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
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
LTC6908-1, DC2073A-J
Complementary Outputs (0°/180°) without Modulation:
250kHz ≤ fOSC ≤ 5MHz, (JP1 to DIV/MOD)
10MHz 10kΩ
10MHz 10kΩ
fOSC =
•
, RSET =
•
N
R
fOSC
N
SET
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)
10MHz 10kΩ
10MHz 10kΩ
fOSC =
•
, RSET =
•
N
R
fOSC
N
SET
Spread Spectrum Modulation Rate:
(JP1 to GND), fOSC/16
(JP1 to OPEN), fOSC/32
(JP1 to V+), fOSC/64
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DEMO MANUAL DC2073A
PARTS LIST
ITEM
General
1
2
3
4
5
6
7
8
DC2073A-A
1
2
3
4
5
6
DC2073A-B
1
2
3
4
5
6
DC2073A-C
1
2
3
4
5
6
DC2073A-D
1
2
3
4
5
DC2073A-E
1
2
3
4
5
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
2
1
0
9
1
1
1
4
C1,C2
C4
C7 OPT
E1-E9
R01
JP1
XJP1
(STAND-OFF)
Cap., Chip, X7R, 10µF, 10%, 16V, 1210
Cap., Chip, X7R, 1000pF, 10%, 16V, 0603
Cap., 0603, OPT
Testpoint, Turret, 0.064"
Res., Chip, 49.9Ω, 1%, 0603
Headers, Dbl. Row 2 x 4 2mm Ctrs
Shunt
Stand-Off, Nylon 0.5"
Murata, GRM32DR71C106KA01
AVX, 0603YC102KAT
Keystone, 8833 (Snap On)
1
2
5
1
1
1
RPOT
RSET1, RS
RJ1, RJ2, RJ3, RJ8, RJ9
C5
C6
U1
3/8" Square Multiturn Cermet Trimmer, 20k
Res., Chip, 10k, 1% 0603
Res., Chip, 0Ω, 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 5-Lead
Vishay, T93YA203KT20
Vishay, CRCW060310K0FKEA
Vishay, CRCW06030000Z0EA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6905CS5
1
2
5
1
1
1
RPOT
RSET1, RS
RJ1, RJ2, RJ3, RJ8, RJ9
C5
C6
U1
3/8" Square Multiturn Cermet Trimmer, 500k
Res., Chip, 4.99k, 1% 0603
Res., Chip, 0Ω, 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 5-Lead
Vishay, T93YA504KT20
Vishay, CRCW06034K99FKEA
Vishay, CRCW06030000Z0EA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC1799CS5
1
2
5
1
1
1
RPOT
RSET1, RS
RJ1, RJ2, RJ3, RJ8, RJ9
C5
C6
U1
3/8" Square Multiturn Cermet Trimmer, 500k
Res., Chip, 20K, 1% 0603
Res., Chip, 0Ω, 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor set SOT-23 Oscillator, SOT23, 5-Lead
Vishay, T93YA504KT20
Vishay, CRCW060320K0FKEA
Vishay, CRCW06030000Z0EA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6900CS5
4
1
1
1
1
RJ2, RJ3, RJ8, RJ9
RE
C5
C6
U1
Res., Chip, 0Ω, 0603
Res., Chip, 1k, 1% 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor set SOT-23 Oscillator, SOT23, 5-Lead
VISHAY, CRCW06030000Z0EA
VISHAY, CRCW06031K0FKEA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6905CS5-133
4
1
1
1
1
RJ2, RJ3, RJ8, RJ9
RE
C5
C6
U1
Res., Chip, 0Ω, 0603
Res., Chip, 1k, 1% 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 5-Lead
Vishay, CRCW06030000Z0EA
Vishay, CRCW06031K0FKEA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6905CS5-100
Mill-Max, 2308-2-00-80-00-00-07-0
Vishay, CRCW060349R9FKEA
Samtec TMM-104-02-L-D
dc2073af
5
DEMO MANUAL DC2073A
PARTS LIST
ITEM
DC2073A-F
1
2
3
4
5
DC2073A-G
1
2
3
4
5
DC2073A-H
1
2
3
4
DC2073A-I
2
3
4
5
DC2073A-J
1
2
3
4
5
6
7
DC2073A-K
1
2
3
4
5
6
7
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
4
1
1
1
1
RJ2, RJ3, RJ8, RJ9
RE
C5
C6
U1
Res., Chip, 0Ω, 0603
Res., Chip, 1k, 1% 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 5-Lead
Vishay, CRCW06030000Z0EA
Vishay, CRCW06031K0FKEA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6905CS5-96
4
1
1
1
1
RJ2, RJ3, RJ8, RJ9
RE
C5
C6
U1
Res., Chip, 0Ω, 0603
Res., Chip, 1k, 1% 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 5-Lead
Vishay, CRCW06030000Z0EA
Vishay, CRCW06031K0FKEA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6905CS5-80
1
2
4
1
RPOT
RSET2, RS
RJ4, RJ5, RJ6, RJ7
U1
3/8" Square Multiturn Cermet Trimmer, 500k
Res., Chip, 100k, 1% 0603
Res., Chip, 0Ω, 0603
Resistor Set SOT-23 Oscillator, SOT23, 6-Lead
Vishay, T93YA504KT20
Vishay, CRCW0603100KFKEA
Vishay, CRCW06030000Z0EA
Linear Tech., LTC6906CS6
1
2
4
1
RPOT
RSET2, RS
RJ4, RJ5, RJ6, RJ7
U1
3/8" Square Multiturn Cermet Trimmer, 500k
Res., Chip, 49.9k, 1% 0603
Res., Chip, 0Ω, 0603
Resistor Set SOT-23 Oscillator, SOT23, 6-Lead
Vishay, T93YA504KT20
Vishay, CRCW060349K9FKEA
Vishay, CRCW06030000Z0EA
Linear Tech., LTC6907CS6
1
2
4
1
1
1
1
RPOT
RSET1, RS
RJ1, RJ2, RJ3, RJ9
R02
C5
C6
U1
3/8" Square Multiturn Cermet Trimmer, 500k
Res., Chip, 10k, 1% 0603
Res., Chip, 0Ω, 0603
Res., Chip, 49.9k, 1%, 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 6-Lead
Vishay, T93YA504KT20
Vishay, CRCW060310K0FKEA
Vishay, CRCW06030000Z0EA
Vishay, CRCW060349R9FKEA
AVX, 0603YC104JAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6908CS6-1
1
2
4
1
1
1
1
RPOT
RSET1, RS
RJ1, RJ2, RJ3, RJ9
R02
C5
C6
U1
3/8" Square Multiturn Cermet Trimmer, 500k
Res., Chip, 10K, 1% 0603
Res., Chip, 0Ω, 0603
Res., Chip, 49.9k, 1%, 0603
Cap., Chip, X7R, 0.1µF, 10%, 16V, 0603
Cap., Chip, X7R, 0.01µF, 10%, 16V, 0603
Resistor Set SOT-23 Oscillator, SOT23, 6-Lead
Vishay, T93YA504KT20
Vishay, CRCW060310K00FKEA
Vishay, CRCW06030000Z0EA
Vishay, CRCW060349R9FKEA
AVX, 0603YC104KAT2A
AVX, 0603YC103KAT2A
Linear Tech., LTC6908CS6-2
dc2073af
6
DEMO MANUAL DC2073A
SCHEMATIC DIAGRAM
dc2073af
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
DEMO MANUAL DC2073A
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 application engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
dc2073af
8
Linear Technology Corporation
LT 0813 • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
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