CN-0147

Circuit Note

Rev. C | Page 4 of 4

COMMON VARIATIONS

Additional regulators can be added for greater isolation

between power supplies, if desired. Also, one ADP150

regulator can be used to power the entire ADF4350 part.

However, care needs to be taken in this case to ensure the

maximum rated current of the single ADP150 regulator is not

exceeded. This is possible if the lowest output power setting

on the ADF4350 is selected.

CIRCUIT EVALUATION AND TEST

This circuit note, CN-0147, uses the EVAL-ADF4350EB1Z

board for evaluation of the described circuit, allowing for quick

setup and evaluation. The EVAL-ADF4350EB1Z board uses the

standard ADF4350 programming software, contained on the

CD that accompanies the evaluation board.

Equipment Needed

Windows® XP, Windows, Vista (32-bit), or Windows 7 (32-bit)

PC with USB Port, the EVAL-ADF4350EB1Z, the ADF4350

programming software, 5.5 V power supply, and a spectrum

analyzer such as a Rhode and Schwartz FSUP26. See this circuit

note CN-0147 and UG-109 user guide for evaluation board

EVAL-ADF4350EB1Z and the ADF4350 data sheet.

Getting Started

This circuit note, CN-0147, contains a description of the circuit,

the schematic, and a block diagram of the test setup. The ser

guide, UG-109, details the installation and use of the EVAL-

ADF4350 evaluation software. UG-109 also contains board

setup instructions and the board schematic, layout, and bill of

materials.

Functional Block Diagram

This circuit note, CN-0147, contains the function block

diagram of the described test setup in Figure 3.

Setup and Test

After setting up the equipment, standard RF test methods

should be used to measure the spectral purity of the output

signal.

LEARN MORE

CN0147 Design Support Package:

http://www.analog.com/CN0147-DesignSupport

ADIsimPLL Design Tool

ADIsimPower Design Tool

Basso, C., C. Fourtet, and P. Kadanka. “Get the Best from Your

Low-Dropout Regulator.” EDN, 18 Feb. 1999.

Data Sheets and Evaluation Boards

ADF4350 Data Sheet

ADF4350 Evaluation Board

ADP150 Data Sheet

ADP3334 Data Sheet

REVISION HISTORY

6/11—Rev. B to Rev. C

Changes to Circuit Description.......................................................2

11/10—Rev. A to Rev. B

Added Evaluation and Design Support Section............................1

Added Circuit Evaluation and Test Section...................................4

7/10—Rev. 0 to Rev. A

Changes to Figure 1...........................................................................1

Changes to Figure 3...........................................................................2

4/10—Revision 0: Initial Version

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