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Evaluation Board User Guide

UG-169

One

 

Technology

 

Way

 

 

P.O.

 

Box

 

9106

 

 

Norwood,

 

MA

 

02062-9106,

 

U.S.A.

 

 

Tel:

 

781.329.4700

 

 

Fax:

 

781.461.3113

 

 

www.analog.com 

 

Evaluating the AD9523/AD9524 Clock Generator 

 

 
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT  
WARNING AND LEGAL TERMS AND CONDITIONS.

 

Rev. 0 | Page 1 of 12 

FEATURES 

Simple power connection using USB connection and  

on-board LDO voltage regulators 

LDOs are easily bypassed for power measurements 
AC-coupled differential SMA connectors 
SMA connectors for  

2 reference inputs 
2 PLL status outputs 
1 reference test input 
2 VCXO interface inputs/outputs 

Microsoft Windows®–based evaluation software  

with simple graphical user interface 

On-board PLL loop filter 
Easy access to digital I/O and diagnostic signals  

via I/O header 

Status LEDs for diagnostic signals 
USB computer interface 
Software calculator provides flexibility, allowing programming 

of almost any rational input/output frequency ratio 

 

GENERAL DESCRIPTION 

This user guide describes the hardware and software of the 

AD9523

 and 

AD9524

 evaluation boards, and includes detailed 

schematics and PCB layout artwork. The AD9523 and AD9524 
are designed to operate in the same manner. This user guide 
serves both boards but refers to the AD9523.  

The AD9523 is defined to support the clock requirements for 
long-term evolution (LTE) and multicarrier GSM base station 
designs. It relies on an external VCXO to provide the reference 
jitter cleanup to achieve the restrictive phase noise requirements 
necessary for acceptable data converter SNR performance. 

The input receivers, oscillator, and zero delay receiver provide 
both single-ended and differential operation. When connected 
to a 30.72 MHz to 122.88 MHz reference clock and a VCXO of 
either 30.72 MHz to 122.88 MHz, the device generates low 
noise outputs from a range of 0.96 MHz to 983.04 MHz. 

DIGITAL PICTURE OF EVALUATION BOARD 

09

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-00

1

 

Figure 1. 

AD9523 Evaluation Board 

 

           

Содержание AD9523

Страница 1: ...ity allowing programming of almost any rational input output frequency ratio GENERAL DESCRIPTION This user guide describes the hardware and software of the AD9523 and AD9524 evaluation boards and incl...

Страница 2: ...he Signal Connections 3 Bypassing the 6 V Wall Socket Power Supply 3 Using I2 C Serial Port Mode 4 Evaluation Board Software Setup 5 Installing the Software 5 Using the Software 5 Software Operation 6...

Страница 3: ...erminated 50 to ground An amplitude setting of 6 dBm is sufficient 2 Connect an oscilloscope spectrum analyzer or other lab equipment to any of the OUTx SMA connectors on the right side of the board T...

Страница 4: ...ss using Jumpers P5 and P6 see Figure 3 Note that setting P5 and P6 low is reserved for SPI mode 2 On the evaluation software select Configure Serial Port from the I O menu see the I O Menu section 3...

Страница 5: ...nd connect the evaluation board to the PC 2 Double click AD9523 Eval Software to run the AD9523 evaluation software A hardware installation window appears Depending on whether the evaluation board was...

Страница 6: ...r own window are outlined in this section From the main window the window for each functional block can be accessed by clicking the appropriate box When a subsection window closes after clicking OK th...

Страница 7: ...to select which evaluation board the software controls see Figure 7 Click Refresh List to detect a recently connected evaluation board 09171 008 Figure 7 Select USB Device Window Selecting Configure...

Страница 8: ...the evaluation software to write the register changes to the evaluation board automatically when they occur Selecting the Auto checkbox adjacent to the UPDATE box forces the evaluation software to is...

Страница 9: ...box from the main window see Figure 16 w configuration of PLL2 see Figure 17 g the CHARGE PUMP box i This window is most often used to vary the charge pump current PLL 2 CONTROLS Clicking t opens a w...

Страница 10: ...o vary the phase offset by changing the phase offset bits setting under the Divider Phase box in Figure 20 However for the new phase to take effect the SYNC signal must be toggled by clicking the SYNC...

Страница 11: ...PROM Control window is shown in Figure 25 is accessed by clicking the EEPROM button near the lower left corner of the main window To store the current register settings of the AD9523 to the EEPROM cli...

Страница 12: ...grants to Customer a free limited personal temporary non exclusive non sublicensable non transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY Customer understands and agrees t...

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