LTC5585 Demo Board (DC1662A) Quick Start Guide Quick Start Procedures: 1. 2. 3. 4. 5. 6. 7. Connect test equipments as shown in Figure 1 with all signal sources and DC supplies off. Turn on the 5V DC power supply. Connect EN to VCC_SENSE. Monitor the DC volt meter, and adjust the DC supply voltage until VCC_SENSE is 5V. Verify ICC is approximately 190mA. Turn on the RF and the LO signal generators. Adjust the spectrum analyzer settings. Be sure to use enough input attenuation to avoid overdriving the spectrum analyzer. 8. Take measurement. Using the IIP2 and DC Offset adjustment features: Method 1 (On-board trim pots): 1. Install jumpers to all 6 positions of jumper block JP1 2. Apply 1V DC to VCTRL. 3. Connect EIP2 and EDC to VCC_SENSE. 4. Adjust REF trim pot until the voltage on the REF test point reaches 0.5V. 5. Adjust IIP2 and DC Offset using the on-board trim pots. Method 2 (External voltage sources): 1. Remove jumpers from all 6 positions of jumper block JP1. 2. Connect EIP2 and EDC to VCC_SENSE. 3. Using 5 separate DC power supplies, apply 0.5V to each of the demo board REF, IP2I, IP2Q, DCOI, and DCOQ test points. 4. Vary the voltages on IP2I, IP2Q, DCO1, and DCOQ to adjust IIP2 and DC Offset. Preliminary Linear Technology Confidential 1 Spectrum Analyzer FSEM30 Combiner Mini-Circuits ZFSCJ-2-1 DC Block Combiner Mini-Circuits ZFSCJ-2-1 DC Block DC Block 50-ohm Termination DC Block 3dB PAD Signal Generator SMJ100A 1V DC Power Supply (20mA Minimum) DC Volt Meter 5V DC Power Supply (250mA Minimum) Signal Generator SME06 3dB PAD Mini-Circuits ZRL-3500 6dB PAD Combiner MCLI PS2-173 Signal Generator SME06 3dB PAD Mini-Circuits ZRL-3500 6dB PAD 6dB PAD Figure 1. Measurement Setup Preliminary Linear Technology Confidential 2 Figure2. Demo Board Schematic Preliminary Linear Technology Confidential 3 Item Qty Reference 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 0 0 7 2 3 1 2 4 10 3 6 1 6 8 1 1 5 4 1 1 1 Part Description C1-C8,C14,C17,C23-C28,R5-R8,R16 C9 C10,C11,C31-C35 C13,C19 C15,C36,C37 C16 C12,C18 C21,C22,C29,C30 E1-E6,E8-E10,E13 E7,E11,E12 J1-J6 JP1 XJP1 (6 LOCATION FOR JP1) L1-L4,R1-R4 L5 L6 PT1-PT5 R9,R11,R13,R14 R15 T1 U1 Preliminary OPT, 0402 OPT, 0603 CAP., X7R, 0.1uF, 10%, 16V, 0402 IND., MULTILAYER, 5.1nH, +/-0.3nH, 0402 CAP., C0G, 1000pF, 5%, 50V, 0402 CAP., X7R, 4.7uF, 10%, 16V, 0805 RES., CHIP, 0 Ohm, 0402 CAP., X5R, 1uF, 10%, 10V, 0402 TESTPOINT, TURRET, .063" TESTPOINT, TURRET, .094" CONN., SMA, 50-OHM, EDGE-LANCH HEADER, 6 X 2 PIN, 2MM SHUNT RES., CHIP, 0 Ohm, 0805 CAP., C0G, 1.0pF, +/-0.05pF, 0402 CAP., C0G, 1.2pF, +/-0.05pF, 0402 POT., 4mm SMD, 500 Ohm RES., CHIP, 100 Ohm, 1%, 1/16W, 0402 RES., CHIP, 1 Ohm, 1%, 1/8W, 0805 TRANSFORMER, RF BALUN IC, LT5585IUF#PBF, QFN 4mm X 4mm Linear Technology Confidential Manufacturer / Part # MURATA, GRM155R71C104KA88D MURATA, LQG15HS5N1S02D MURATA, GRM1555C1H102JA01D MURATA, GRM21BR71C475KA73L VISHAY, CRCW04020000Z0 MURATA, GRM155R61A105KE15D MILL-MAX, 2308-2-00-80-00-00-07-0 MILL-MAX, 2501-2-00-80-00-00-07-0 E.F.JOHNSON, 142-0701-851 SAMTEC, TMM-106-02-L-D SAMTEC, 2SN-BK-G VISHAY, CRCW08050000Z0 MURATA, GJM1555C1H1R0WB01D MURATA, GJM1555C1H1R2WB01D BOURNS, 3214X-1-501-E VISHAY, CRCW0402100RFKED VISHAY, CRCW08051R00FNEA ANAREN, BD0826J50200A00 LINEAR TECH., LT5585IUF#PBF 4