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 ® dc2073af 1 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). dc2073af 2 DEMO MANUAL DC2073A QUICK START PROCEDURE Figure 1. Test Setup dc2073af 3 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 dc2073af 4 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