SY87739LHI-EVAL Micrel Inc, SY87739LHI-EVAL Datasheet

BOARD EVAL N SY87739 EXPERIMENT

SY87739LHI-EVAL

Manufacturer Part Number
SY87739LHI-EVAL
Description
BOARD EVAL N SY87739 EXPERIMENT
Manufacturer
Micrel Inc
Datasheets

Specifications of SY87739LHI-EVAL

Main Purpose
Timing, Frequency Synthesizer
Embedded
No
Utilized Ic / Part
SY87739
Primary Attributes
Single Integer-N PLL
Secondary Attributes
729MHz, Graphical User Interface, PECL Inputs and Outputs, 3.3V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1406
SY87739L-EVAL
Micrel, Inc.
SuperCOM is a trademark of Micrel, Inc.
M9999-071906
hbwhelp@micrel.com or (408) 955-1690
FEATURES
EVALUATION BOARD COMPONENTS
DC coupled and terminated PECL inputs
AC coupled PECL outputs
Programmable via any PC using printer cable
Includes a 27.0000MHz oscillator on board
SY87729/39L evaluation board
SY87729/39L data sheet and this document
SY87729/39L software (download from
http://www.micrel.com/product-info/
fractional_n_synthesizers.shtml)
Two length-matched 1 foot SMA cables (optional,
user supplied)
PC running Windows (user supplied)
Printer cable, parallel-to-centronics (user supplied)
Programming Port
Clock Inputs
Centronics
Reference
Reference
Oscillator
Outputs
SY87729L 10MHz to 365MHz
SY87739L 10MHz to 729MHz
FRACTIONAL-N SYNTHESIZERS
1
frequency synthesizer ICs. From a single reference source,
they can generate any clock frequency from 10MHz to
729MHz very accurately.
evaluation board, evaluation procedure and the simple
configuration software it uses. Complete information in this
document includes:
Power
Banana Jack
(J1)
DESCRIPTION
The SY87729/39L are rate independent fractional-N
This document provides a detailed description of the
1. Test setup and measuring frequency output with
2. Test setup and measuring jitter with an internal
3. Download and use of the configuration software
4. Board schematic and Bill of Materials.
a signal generator.
reference oscillator.
Ground
Banana Jack
(J2)
Evaluation Board
Synthesized
Clock Outputs
SuperCOM™
Rev.: B
Issue Date: July 2006
Evaluation Board
SY87729L
SY87739L
SY87729/39L
Amendment: /0

Related parts for SY87739LHI-EVAL

SY87739LHI-EVAL Summary of contents

Page 1

Micrel, Inc. FEATURES DC coupled and terminated PECL inputs AC coupled PECL outputs Programmable via any PC using printer cable Includes a 27.0000MHz oscillator on board EVALUATION BOARD COMPONENTS SY87729/39L evaluation board SY87729/39L data sheet and this document SY87729/39L software ...

Page 2

Micrel, Inc. GETTING STARTED Before powering up the SY87729/39L evaluation board, you must do the following: 1. Familiarize yourself with the SY87729/39L evaluation board. 2. Make sure that you are properly grounded. 3. Read and understand this document in its ...

Page 3

Micrel, Inc. EVALUATION PROCEDURE Downloading the Application Software Micrel’s SY87729/39L accepts configuration information via a bit-serial interface. To program the device, the user must download 32 bits of configuration information into SY87729/39L. Micrel provides a download application for use with ...

Page 4

Micrel, Inc. Figure 3. Filling in the I/O Ports Tab You then click the “Add” button. This selects the range of I/O addresses specified, and places it into the “Active Ports” Window, as shown in Figure 4. Figure 4. After ...

Page 5

Micrel, Inc. Click the “OK” button. Check your work by running the “739ev” application. If, instead of running, you get a message box like that in Figure 9, you’ve performed one or more of the above steps incorrectly. Re-read this ...

Page 6

Micrel, Inc. Figure 11. Desired Output Frequency Cannot Be Synthesized The error message is telling you that SY87729/39L cannot synthesize an 8.9MHz clock from a 27MHz clock. Remember, the smallest output frequency SY87729/39L can generate is 9.0MHz, no matter what ...

Page 7

Micrel, Inc. Figure 15. Generating 622.08MHz With the Wrapper (Using SY87739L Only) In both Figures 14 and 15, the output frequency was generated exactly. However, generated jitter tracks roughly with the size of the denominator in the fractional-N synthesizer. This ...

Page 8

Micrel, Inc. parameters, and then enter them yourself along the left side of the download application, or you could click the “739ifier” button. This launches another copy of the calculation module. As explained above, once you’ve got the desired output ...

Page 9

Micrel, Inc. The status line will have a different message if there were no errors in the configuration. For example, starting with the download application looking like Figure 17, if you click the “Download” button, you should end up with ...

Page 10

Micrel, Inc. The following steps allow the user to verify cycle-to-cycle jitter of the SY87729/39L evaluation board: 1. Connect Power Source : The power supply should be set to about 3.3V. Current consumption will be between 250mA and 300mA. Connect ...

Page 11

Micrel, Inc. EVALUATION BOARD SCHEMATICS Figure 19 is the schematic for the SY87729/39L evaluation board the device being highlighted. The LVPECL input is DC coupled and terminated via R3, R4, R5 and C6. This network biases R5 at ...

Page 12

Micrel, Inc. BILL OF MATERIALS Item Description 16V “C” Size, Tantalum Electrolytic Capacitor C2, C3, C4, C5 100nF, 10V X7R Size 0603 Ceramic Capacitor C6, C7, C8 0.1 F, 10V Size 0805, Ceramic Bypass Capacitor C9, C10, ...

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