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dc1774acf

DEMO MANUAL DC1774A-C

ADDITIONAL INFORMATION

Figure 7. Proper Equipment Setup for Gain and Single-Tone Measurement

SPECTRUM

ANALYZER

SIGNAL

GENERATOR

(HP8644A)

ROHDE AND

SCHWARZ

FSEM30

COAXIAL CABLE

LOWPASS

FILTER

(OPTIONAL)

3dB

ATTENUATION PAD

(OPTIONAL)

ASSY

FREQ

-A

LTC6430IUF-15

100MHz TO 300MHz

-B

LTC6430IUF-15

400MHz TO 1000MHz

-C

LTC6431IUF-15

100MHz TO 1200MHz

DC POWER SUPPLY

GND

V+

Figure 6. IMD Buried in the Noise Floor

Figure 5. Not Enough Input Attenuation

+2dBm

~ –80 dBm

Noise Floor at

~ –101dBm

+2dBm

Noise Floor at

~ –81dBm

Содержание DC1774A-C

Страница 1: ...e at TA 25 C VCC 5V SYMBOL PARAMETER CONDITIONS VALUE UNIT Power Supply VCC Operating Supply Range All VCC Pins Plus OUT 4 75V to 5 25V ICC Current Consumption Total Current 90mA FREQUENCY MHz POWER GAIN S21 dB OUTPUT THIRD ORDER INTERCEPT POINT 1 OIP3 dBm OUTPUT THIRD ORDER INTERMODULATION 1 OIM3 dBc SECOND HARMONIC DISTORTION 2 HD2 dBc THIRD HARMONIC DISTORTION 2 HD3 dBc OUTPUT 1dB COMPRESSION P...

Страница 2: ...to the power supply Typical current consumption of the LTC6431 15 is about 90mA 2 Apply two independent signals f1 and f2 from SG1 and SG2 at 240MHz and 241MHz respectively 3 Monitortheoutputtonelevelonthespectrumanalyzer Adjust signal generator levels such that output power measures 2dBm toneattheamplifieroutputJ10 after correcting for external cable losses and attenuators 4 Change the spectrum a...

Страница 3: ...V J7 IN R2 348 C8 62pF C22 0 1uF E3 U1 2 14 1 24 4 6 8 10 21 19 17 22 20 18 16 5 9 11 15 12 13 3 23 7 25 DNC GND DNC IN DNC DNC GND N C DNC DNC GND VCC DNC OUT T_DIODE DNC VCC N C DNC N C DNC DNC GND DNC GND C1 1000pF J10 OUT C7 1000pF C20 1000pF C3 1000pF FREQUENCY MHz NOMINAL WORKING FREQUENCY RANGE 0 S21 dB 18 14 10 6 16 12 8 4 S11 S12 S22 dB 0 8 16 24 4 12 20 28 6 14 22 2 10 18 26 1600 800 dc1...

Страница 4: ... limited by on chip matching elements TheSchematicDiagramsectionshowsthePCB sschematic of the amplifier family LTC643X YY Hence the board can be modified for multiple demo board versions For example both DC1774A A and DC1774A B demo boards have a differential amplifier at U1 therefore the board Anoptionalparallel62pF C8 and348Ω R2 inputnetwork has been added to insure low frequency stability Table...

Страница 5: ...n of the intermodulation products amplitude in dBc relative to the main tone power i e adjust fre quency span and resolution bandwidth to display the noise floor The wider span frequency will take a longer time to sweep e Insert a small attenuator pad 3dB or 6dB at the signal combinerinputs intothesetupandobserveifthesetup limitstheintermodulationproductslevel i e foragood IP3 test setup with suff...

Страница 6: ...4A ROHDE AND SCHWARZ FSEM30 COAXIAL CABLE LOWPASS FILTER OPTIONAL 3dB ATTENUATION PAD OPTIONAL ASSY U1 FREQ A LTC6430IUF 15 100MHz TO 300MHz B LTC6430IUF 15 400MHz TO 1000MHz C LTC6431IUF 15 100MHz TO 1200MHz DC POWER SUPPLY GND V Figure 6 IMD Buried in the Noise Floor Figure 5 Not Enough Input Attenuation 2dBm 80 dBm Noise Floor at 101dBm 2dBm Noise Floor at 81dBm ...

Страница 7: ...HDE AND SCHWARZ FSEM30 COAXIAL CABLE 20dB ATTENUATION PAD LOWPASS FILTER 6dB ATTENUATION PAD OPTIONAL COMBINER MINI CIRCUIT ADP 2 9 3dB ATTENUATION PAD SIGNAL GENERATOR 2 HP8644A AMPLIFIER MINI CIRCUIT ZHL 2 OR EQUIVALENT 6dB ATTENUATION PAD OPTIONAL LOWPASS FILTER ASSY U1 FREQ A LTC6430IUF 15 100MHz TO 300MHz B LTC6430IUF 15 400MHz TO 1000MHz C LTC6431IUF 15 100MHz TO 1200MHz DC POWER SUPPLY GND ...

Страница 8: ... 0603LS 561XJLB 15 0 L11 L22 INDUCTOR CHIP 1008LS 2520 OPT 16 1 R2 RES CHIP 348Ω 1 0402 YAGEO RC0402FR 07348RL 17 0 R5 R6 RES CHIP 348Ω 1 0402 OPT 18 0 R19 RES CHIP 0Ω 5 0402 YAGEO RC0402JR 070RL 19 2 STENCILS FOR BOTH SIDES DC1774A 2 DC1774A2 C Required Circuit Components 1 1 DC1774A 2 GENERAL BOM 2 0 C2 C4 CAP X7R 1000pF 50V 5 0402 AVX 04025C102JAT2A 3 0 C5 CAP X7R 1000pF 50V 5 0603 AVX 06035C10...

Страница 9: ...ZE DATE IC NO REV SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY Fax 408 434 0507 Milpitas CA 95035 Phone 408 432 1900 1630 McCarthy Blvd LTC Confidential For Customer Use Only CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE A...

Страница 10: ...CLUDING 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 g...

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