National Semiconductor Introduces Industry's Lowest Phase Noise Clock Jitter Filter

The clock jitter filter, which has the lowest phase noise in the industry National Semiconductor announces a series of new and rms jitter performances: RMS jitter of only 111 fly between 12kHz and 20MHz Second (fs); 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 (SDR) and digital broadcasting equipment, low phase noise can reduce overall system billing costs, in addition to improving system stability. .

Analog-to-digital converters, digital-to-analog converters, serializers/deserializers, and FPGA chips 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. The LMK04800 series clock jitter filter consists of four integrated circuits, including four different types of LMK04808, LMK04806, LMK04805, and LMK04803, which can simplify the clock circuit system because the LMK04800 series chips have unique functions and excellent performance. The architecture design allows 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.