National Semiconductor announced a series of new clock jitter filters that have the industry's lowest phase noise and rms jitter performance: RMS jitter of only 111 femtoseconds (fs) between 12kHz and 20MHz. If the output frequency is 184MHz, the wideband noise floor of the PLL is only -162dBc/Hz. For wireless and wired communication systems, test and measurement equipment, medical imaging systems, software radio systems (SDRs) and digital broadcasting equipment, low phase noise can reduce the overall bill of materials (BOM) in addition to improving system stability. )the cost of.
The LMK04800 series clock jitter filter consists of four integrated circuits (ICs), including four different types of LMK04808, LMK04806, LMK04805 and LMK04803, which can be analog/digital converters, digital/analog converters, serializers/solutions. The serializer and FPGA chip provide different clock signals with clock frequencies up to 1.5 GHz. In addition to functions such as holdover, switching, multi-input, digital delay, and analog delay, the LMK04800 chip also includes an odd/even frequency divider and 12 programmable output format drivers. Therefore, the LMK04800 has extremely high flexibility. Configuration easily supports many different architectures. All along, developers have to use many components and spend a lot of design time to implement these functions. With the introduction of the LMK04800 family of chips, they can significantly reduce material costs in this area and reduce design time.
Because the LMK04800 series has unique features and superior performance, it can simplify the system architecture design of the clock circuit and allow design engineers to have more choices in system performance, component count, and cost. The LMK04800 clock jitter filter can be used with National's high-speed operational amplifiers and analog-to-digital converters (LMH6554, LMH6517, ADC12D1600, ADC12D1000, and ADC16DV160) to provide a complete signal path solution.
The LMK04800 series clock jitter filter consists of four integrated circuits (ICs), including four different types of LMK04808, LMK04806, LMK04805 and LMK04803, which can be analog/digital converters, digital/analog converters, serializers/solutions. The serializer and FPGA chip provide different clock signals with clock frequencies up to 1.5 GHz. In addition to functions such as holdover, switching, multi-input, digital delay, and analog delay, the LMK04800 chip also includes an odd/even frequency divider and 12 programmable output format drivers. Therefore, the LMK04800 has extremely high flexibility. Configuration easily supports many different architectures. All along, developers have to use many components and spend a lot of design time to implement these functions. With the introduction of the LMK04800 family of chips, they can significantly reduce material costs in this area and reduce design time.
Because the LMK04800 series has unique features and superior performance, it can simplify the system architecture design of the clock circuit and allow design engineers to have more choices in system performance, component count, and cost. The LMK04800 clock jitter filter can be used with National's high-speed operational amplifiers and analog-to-digital converters (LMH6554, LMH6517, ADC12D1600, ADC12D1000, and ADC16DV160) to provide a complete signal path solution.