TI E2E Community

New Video Series for CDCE(L)9xx online

Julian — Thu, 04 Apr 2013 12:32:00 GMT

New Video Series for CDCE(L)9xx in 3 parts explains the EVM Hardware, Software and Feature Set. The Videos can be watched below or you visit on of the products homepage with further information about EVMs and Software (e.g: <a href="http://www.ti.com/product/cdce949#videoheader">http://www.ti.com/product/cdce949#videoheader</a>). <object id="kaltura_player_1365077980" name="kaltura_player_1365077980" data="http://www.kaltura.com/index.php/kwidget/wid/1_d5opqqe0/uiconf_id/2342281" type="application/x-shockwave-flash" allowscriptaccess="always" allownetworking="all" allowfullscreen="true" height="330" width="400"> <a href="http://corp.kaltura.com">video platform</a><a href="http://corp.kaltura.com/video_platform/video_management">video management</a><a href="http://corp.kaltura.com/solutions/video_solution">video solutions</a><a href="http://corp.kaltura.com/video_platform/video_publishing">video player</a></object>   <object id="kaltura_player_1365078154" name="kaltura_player_1365078154" data="http://www.kaltura.com/index.php/kwidget/wid/1_p0qql2uk/uiconf_id/2342281" type="application/x-shockwave-flash" allowscriptaccess="always" allownetworking="all" allowfullscreen="true" height="330" width="400"> <a href="http://corp.kaltura.com">video platform</a><a href="http://corp.kaltura.com/video_platform/video_management">video management</a><a href="http://corp.kaltura.com/solutions/video_solution">video solutions</a><a href="http://corp.kaltura.com/video_platform/video_publishing">video player</a></object>   <object id="kaltura_player_1365078138" name="kaltura_player_1365078138" data="http://www.kaltura.com/index.php/kwidget/wid/1_my93yy7f/uiconf_id/2342281" type="application/x-shockwave-flash" allowscriptaccess="always" allownetworking="all" allowfullscreen="true" height="330" width="400"> <a href="http://corp.kaltura.com">video platform</a><a href="http://corp.kaltura.com/video_platform/video_management">video management</a><a href="http://corp.kaltura.com/solutions/video_solution">video solutions</a><a href="http://corp.kaltura.com/video_platform/video_publishing">video player</a></object>

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CDCE62005: Advanced GUI Available (w/ ini file sanity checker)

Julian — Thu, 07 Mar 2013 10:16:00 GMT

The newest CDCE62005 GUI got improved to work under WinXP/Win7 32bit/64bit. In addition it includes a sanity check for ini files. By loading an ini file into the GUI the sanity checker starts and highlight wrong bit settings.

Gui available at: http://www.ti.com/litv/zip/scac105e

CDCM6208 GUI video 1 online

Fritz — Wed, 30 May 2012 09:20:15 GMT

The CDCM6208 clock synthesizer was released to mass production today. http://www.ti.com/product/cdcm6208

To assist with using the GUI, the following video is available: http://www.youtube.com/watch?v=RUhTM7XtA-E

CDCM1802/CDCM1804: enabling, if input clock is applied

Julian — Thu, 26 Apr 2012 14:43:41 GMT

In the datasheet TI describes that the device needs 1us to settle internal voltages and bandgap after EN goes high:

However, if the input clock is already available, there is no issue to enable the outputs of CDCM1802/CDCM1804. The device still need 1us to have a stable output clock with full swing:

To avoid undefined pulses during the 1us settling time, it is allowed to do a power sequencing. The CDCM1802/CDCM1804 has separated output supplies. This gives the flexibility to turn of the outputs during the internal settling time of 1us to avoid undefined pulses.

CDCE72010 input termination schemes explained (2)

Fritz — Fri, 24 Feb 2012 07:12:37 GMT

Here is a link to a nice presentation of different input termination schemes for the CDCE72010:

http://e2e.ti.com/support/clocks/m/videos__files/610618/download.aspx

CDCM6100x frequency planner - simple Excel tool available on E2E

Fritz — Tue, 17 Jan 2012 20:54:00 GMT

Here a great little tool helping to quickly configure the CDCM61001, CDCM6102, or CDCM61004.

http://e2e.ti.com/support/clocks/m/videos__files/576535.aspx

The LVDS clock Buffer families CDCLVD12xx and CDCLVD21xx offer failsafe inputs

Fritz — Wed, 14 Dec 2011 16:24:51 GMT

We can confirm that the 2.5V LVDS clock buffer family offers failsafe inputs. This means the clock input signal can already be applied to the clock buffer while power is still ramping. We will in the near future adjust the absolute max ratings in the data sheets accordingly to reflect this.

While the website of the device already mentioned failsafe in the past, the data sheets in the absolute maximum section still indicate that the input voltage could only be 0.2V higher than VCC. this will be corrected.

Here a list of devices this applies to:

CDCLVD1204

CDCLVD1208

CDCLVD1212

CDCLVD1213

CDCLVD1216

CDCLVD2102

CDCLVD2104

CDCLVD2106

CDCLVD2108

Best regards, your TI clock team

CDCM6208

Fritz — Sun, 17 Apr 2011 05:50:00 GMT

The Hardware Design Guide for KeyStone Devices found at http://www.ti.com/litv/pdf/sprabi2 refers to the CDCM6208, which is not yet released on the TI external web.

If you have any question in regards to the CDCM6208, please send an email to the following email address, and a TI sales representative will respond to you shortly:

cdcm6208_inquiry@list.ti.com

Much thanks & Best regards, Fritz

update 01/19/2012: GUI for this device now available at: http://e2e.ti.com/support/clocks/m/videos__files/578990.aspx

Clocking ADC and DAC - useful application notes

Fritz — Thu, 21 Oct 2010 18:16:23 GMT

I just happened to train distribution FAEs and found a general interest into the topic of clocking ADCs and DACs. Maybe there is a wider need out there?

Here my 3 most favorite application notes on this topic:

ADC clocking in general (great and comprehensive): http://focus.ti.com/lit/an/slyt075/slyt075.pdf

addl ADC clocking - determining the integration range: http://focus.ti.com/lit/an/slyt379/slyt379.pdf

addl ADC clocking - are we overspecifying the clock requirements for ADCs? http://www.eetimes.com/design/analog-design/4207307/Signal-Chain-Basics-45--Is-high-speed-ADC-clock-jitter-being-over-specified-for-communication-systems--

CDCE62005 GUI - now offers reverse frequency planning AND we overhauled the loop filter tool completely!!!

Fritz — Thu, 21 Oct 2010 03:43:00 GMT

update 10/20/2010: We just overhauled the CDCE62005 GUI integrated loop filter tool. We departed from the Excel sheet approach, and ported a graphical loop filter interface instead into the GUI. You can now get the right R & C recommendations based on your desired loop filter bandwidth, phase margin, and jitter peaking. To try out the new tool, go here:

http://e2e.ti.com/support/clocks/m/videos__files/224554.aspx

initial announcement in Augugst: Just brandnew arrive the CDCE62005 GUI Beta version, which offers a robust and clean reverse frequency calculator and planning tool. Check out the following link for details: http://e2e.ti.com/support/clocks/m/videos__files/224554.aspx

Have a great week, your TI clocks team

Clocking High-Speed Serializer and De-Serializer - New article published at Planet Analog by John Johnson, Manager, Market Development and Systems Engineering, Texas Instruments

Fritz — Wed, 20 Oct 2010 17:39:00 GMT

Planet Analog just published an article about High-Speed SERDES clocking written by John Johnson. You can find the article at:

http://www.eetimes.com/design/analog-design/4208825/SIGNAL-CHAIN-BASICS--46--Basics-of-clock-jitter-specifications-in-high-speed-links--Part-I-?cid=NL_PlanetAnalog&Ecosystem=analog-design

Enjoy the reading! Fritz (TI Clocks & Timing Products)

CDCE62002 and CDCE62005 SPI related upnote was updated and now posted on E2E

Fritz — Wed, 01 Sep 2010 15:35:00 GMT

A new revision of the CDCE6200x SPI interface is posted at:

http://e2e.ti.com/support/clocks/m/videos__files/180965.aspx

What if the CDCE62005 Excel Loop Filter Calculator causes me trouble?

Fritz — Thu, 19 Aug 2010 02:49:00 GMT

Did you know that the CDCE62005 comes with the ability to utilize an internal PLL loop filter or an external loop filter? When using the external loop filter on the CDCE62005 EVM, you actually can choose from 5 different external filter. BUT: What do you do if the bandwidth calculator embedded into the CDCE62005 always cause a runtime error? Here is the solution:

Problem:

CDCE62005 Loop bandwidth Excel file doesn't working ok, always runtime error type:13 mistake.

Solution/Answer (A) - no longer recommended:

On Excel 2003 go to Tools/ Add Ins and check the following.

Analysis Tool Pack and Tool Pack VBA.

Select the following add-Ins: Analysis ToolPak, Analysis ToolPak - VBA, Internet Assistant VBA

Solution/Answer (B) - recommended:

Simply upgrade your GUI to the latest version, which utilizes a much more powerful loop filter tool, and it isn't any longer based on Excel. Interested? Go here:

http://e2e.ti.com/support/clocks/m/videos__files/224554.aspx

TI Clocks - PLL Loopfilter tool

Fritz — Thu, 19 Aug 2010 02:05:00 GMT

TI PLL loop filter tool available here

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