DDS Module - AD9850

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Contents

Introduction

The DDS module is base on AD9850 which is provided by ADI Company and common used in many DDS module.The chip provide 0-40MHz measurement capability,the AD9850’s innovative high speed DDS core provides a 32-bit frequency tuning word, which results in an output tuning resolution of 0.0291 Hz for a 125 MHz reference clock input.

This module provide you a ready made hardware and you can use serial or paralle pins on board to control the AD9850 for different frequency out put. The duty can be adjust by a adjustable resistor - which change the adjust voltage level of the comparer.

BK AD9875 08 LRG.jpg

Feature

Application Ideas

Cautions

Schematic

BK AD9875 07 LRG.jpg

Specification

Pin definition and Rating

BK AD9875 06 LRG.jpg


1. Unconnect:Parallel mode, Connect: Serial mode
2. AD9850
3.

GND D6
D7 D5
WCLK D4
FQUP D3
REST D2
VCC D1
I-R D0
Serial mode just need connect GND,D7 WCLK, FQUP, REST, VCC, I-R 
Parallel mode need connect all of the pin.


4. Current Supply Slection
5. 125Mhz Active crystal
6. Unconnect: square wave enable , Connect: square wave disable
7.

Pin define
Comparator Input
Comparator Voltage
NC
Sine Wave 1
NC
Square Wave 2
Square Wave 1

8. Duty cycle adjustedable - Comparator reference input voltage generated by the variable resistor
9. Power State LED
10. Sine Wave 2(Output)

Mechanic Dimensions

BK AD9875 09 LRG.jpg

Usage

Hardware Installation

Programming

Includes important code snippet. Demo code like :

Demo code
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Example

The projects and application examples.

Bill of Materials (BOM) /parts list

All the components used to produce the product.

FAQ

Please list your question here:

Support

If you have questions or other better design ideas,

Version Tracker

Revision Descriptions Release
v1.0b Initial public release date

Bug Tracker

Bug Tracker is the place you can publish any bugs you think you might have found during use. Please write down what you have to say, your answers will help us improve our

products.

Additional Idea

The Additional Idea is the place to write your project ideas about this product, or other usages you've found. Or you can write them on Projects page.

Resources

How to buy

Click here to buy: http://www.elecfreaks.com/store/dds-module-ad9850-p-260.html

See Also

Other related products and resources.

Licensing

This documentation is licensed under the Creative Commons Attribution-ShareAlike License 3.0 Source code and libraries are

licensed under GPL/LGPL, see source code files for details.

External Links

Links to external webpages which provide more application ideas, documents/datasheet or software libraries

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