Preliminary
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LTC5584 Demo Board (DC1670A) Quick Start Guide
Quick Start Procedures:
1. Connect test equipments as shown in Figure 1 with all signal sources and DC supplies off.
2. Turn on the 5V DC power supply.
3. Connect EN to VCC_SENSE.
4. Monitor the DC volt meter, and adjust the DC supply voltage until VCC_SENSE is 5V.
5. Verify ICC is approximately 190mA.
6. Turn on the RF and the LO signal generators.
7. Adjust the spectrum analyzer settings. Be sure to use enough input attenuation to avoid over-
driving 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
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Figure 1. Measurement Setup
Signal
Generator
SMJ100A
3dB
PAD
DC Block DC Block
Combiner
Mini-Circuits
ZFSCJ-2-1
Spectrum
Analyzer
FSEM30
DC Block DC Block
Combiner
Mini-Circuits
ZFSCJ-2-1
50-ohm
Termination
Signal
Generator
SME06
Signal
Generator
SME06
3dB
PAD
3dB
PAD
ZHL-1042J
ZHL-1042J
3dB
PAD
3dB
PAD
Combiner
MCLI
PS2-104
6dB
PAD
Mini-Circuits
Mini-Circuits
DC Volt
Meter
1V DC Power
Supply
(20mA Minimum)
5V DC Power
Supply
(250mA Minimum)
Preliminary
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Figure2. Demo Board Schematic
Preliminary
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Item Qty Reference Part Description Manufacturer / Part #
1 0 C1-C8,C14,C19,C23-C28,C36,C37,R5-R8,R16 OPT, 0402
2 0 C9 OPT, 0603
3 7 C10,C11,C31-C35 CAP., X7R, 0.1µF, 10%, 16V, 0402 MURATA, GRM155R71C104KA88D
4 6 C12,C18,R10,R12,R17,R18 RES., CHIP, 0 Ohm, 0402 VISHAY, CRCW04020000Z0ED
5 1 C13 CAP., COG, 2.2pF, +/- 0.05pF, 50V, 0402 MURATA, GJM1555C1H2R2WB01D
6 5 C15,C38-C41 CAP., X5R, 0.01uF, 10%, 50V, 0402 MURATA, GRM155R71H103KA88D
7 1 C16 CAP., X7R, 4.7uF, 10%, 16V, 0805 MURATA, GRM21BR71C475KA73L
8 1 C17 CAP., COG, 1.5pF, +/- 0.05pF, 50V, 0402 MURATA, GJM1555C1H1R5WB01D
9 4 C21,C22,C29,C30 CAP., X5R, 1µF, 10%, 10V, 0402 MURATA, GRM155R61A105KE15D
10 10 E1-E6,E8-E10,E13 TESTPOINT, TURRET, .063" MILL-MAX, 2308-2-00-80-00-00-07-0
11 3 E7,E11,E12 TESTPOINT, TURRET, .094" MILL-MAX, 2501-2-00-80-00-00-07-0
12 6 J1-J6 CONN., SMA, 50-OHM, EDGE-LANCH E.F.JOHNSON, 142-0701-851
13 1 JP1 HEADER, 6 X 2 PIN, 2mm SAMTEC TMM-106-02-L-D
14 6 XJP1 (6 LOCATION FOR JP1) SHUNT SAMTEC 2SN-BK-G
15 8 L1-L4,R1-R4 RES., CHIP, 0 Ohm, 0805 VISHAY, CRCW08050000Z0EA
16 1 L5 IND., MULTILAYER, 3.9nH, +/-0.3nH, 0402 MURATA, LQG15HS3N9S02D
17 1 L6 IND., MULTILAYER, 5.6nH, +/-0.3nH, 0402 MURATA, LQG15HS5N6S02D
18 5 PT1,PT2,PT3,PT4,PT5 POT., 4mm SMD, 500 Ohm BOURNS, 3214X-1-501-E
19 4 R9,R11,R13,R14 RES., CHIP, 100 Ohm, 1%, 1/16W, 0402 VISHAY, CRCW0402100RFKED
20 1 R15 RES., CHIP, 1 Ohm, 1%, 1/8W, 0805 VISHAY, CRCW08051R00FNEA
21 2 T1,T2 TRANSFORMER, RF, 1:1, 4.5-3000MHz MINI-CIRCUITS, TC1-1-13M+
22 1 U1 IC, LTC5584IUF#PBF, QFN 4mm X 4mm LINEAR TECH., LTC5584IUF#PBF
