TI E2E Community
Low Power RF & Wireless Connectivity
Low Power RF Tools Forum
CC430/CC1101 RF XTAL 23.745MHz ???
Is it possible to run the RF on the CC430 range at a lower RF reference osscillator speed? I know that Smart studio limits the RF Xtal to between 26MHz and 27MHz but to achieve some legacy frequencies/modulation schemes on a new product we are considering this family of IC's for we would need to run off a 23.745MHz oscillator. As long as all of the internal registers are set up correctly is using this lower oscillator frequency likely to break anything. Also if the IC will work with this oscillator what will be the maximum frequency achievable in the 400MHz band?
The parts are neither designed nor characterized for lower than 26 MHz crystal oscillator frequency.
The IF-ADC is very sensitive to sampling frequency, partly due to the low over-sampling which puts a lower limit on the frequency, and partly due to internal loop-delay which generates an upper limit.
There is a sharp transition from a working ADC to non-functional ADC/ADC with extremely poor SNR. In addition this limit will vary from chip to chip, with supply and temperature. Thus we can not guarantee performance if you go beyond the specified crystal frequency range.
The maximum frequency in the 400 MHz band is 464 MHz. Please note that CC1100E has higher maximum frequency in the 400 MHz band than CC1101.
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.