TI E2E Community
Clocks & Timers
Clocks & Timers Forum
A customer is asking the following:
The LMK03806 is spec’d from -40C. Will it power up and operate at -55C?
Let me clarify this question:
Interpretation #1: Will the LMK03806 typically operate down to -55C?
I have operated this device down to -60C and it has worked fine. We have not evaluated the this with an external crystal or tried locking this at +85 and drifting to -60 without programming the device to ensure the VCO retains lock. We have not fully characterized this device down at -60, so there could be other potential issues there.
Interpretation #2: Will you GUARNTEE the LMK03806 will operate down to -55C?
Not without NRE or a business commitment to buy a large volume of this device.
My customer is asking the follow on question:
On the LMK03806B evaluation board, the instructions says to choose 20MHz external crystal, but it appears that 100MHz crystal is populated on the board. Is this correct?
If so, can you get me the part number for the 100MHz crystal?
Also the DNP parts on the schematic is somewhat different than the board. An updated schematic would also be great. Can you supply an updated schematic?
The 100 MHz crystal is the Connor Winfield CWX-813 XO at 100 MHz. We include this because you can actually get better performance with an XO than a crystal (and using the internal inverter) for the LMK03806.
For these boards, this is a newer product so sometimes make changes for this. I will get someone to update the instructions updated on the web to our most recent schematic.
The LMK03806BEVAL evaluation board user's guide was recently updated (March 2012) and has the latest schematic:http://www.ti.com/lit/ug/snau075/snau075.pdf
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.