DATA SHEET SKY72310-11: Spur-Free, 50 MHz to 2.1 GHz Single Fractional-N Frequency Synthesizer Applications Description Skyworks SKY72310-11 fractional-N frequency synthesizer Land mobile radio systems provides ultra-fine frequency resolution, fast switching speed, and 4G and 5G wireless infrastructure low phase-noise performance. This synthesizer is a key building Broadband wireless access block for high-performance radio system designs that require low power and fine step size. Low bit rate wireless telemetry The ultra-fine step size of less than 100 Hz allows this synthesizer Instrumentation to be used in very narrowband wireless applications. With proper L-band receivers temperature sensing or through control channels, the Satellite communications synthesizers fine step size can compensate for crystal oscillator or intermediate frequency (IF) filter drift. As a result, crystal oscillators or crystals can replace temperature-compensated or Features ovenized crystal oscillators, reducing parts count and associated component cost. The devices fine step size can also be used for Spur-free, fractional-N operation Doppler shift corrections. Operating frequency: 50 MHz to 2.1 GHz Reference crystals or oscillators up to 50 MHz can be used with Normalized phase noise: -218 dBc/Hz the SKY72310-11. The crystal frequency is divided down by Low power consumption:11 to 14 mW typical 3 V independent programmable dividers (1 to 32) for the synthesizer. The phase detector can operate at a maximum speed of 50 MHz, Ultra-fine step size, 100 Hz or less which allows better phase noise due to the lower division value. Software programmable power-down modes With a high reference frequency, the loop bandwidths can also be High-speed serial interface up to 100 Mbps increased. Larger loop bandwidths improve the settling times and reduce in-band phase noise. Therefore, typical switching times of Programmable division ratios on reference frequency less than 100 s can be achieved. The lower in-band phase Phase detector with programmable gain to provide a noise also permits the use of lower cost Voltage Controlled programmable loop bandwidth Oscillators (VCOs) in customer applications. On-chip crystal oscillator Supply range: 2.7 to 3.3 V operation High ESD: 1 kV HBM MCM (24-pin, 4 x 4 mm) (MSL3, 260 C per JEDEC J-STD-020) package Pin-compatible replacement to the SKY72310-362LF Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 203639I Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice August 2, 2019 1 DATA SHEET SKY72310-11: SPUR-FREE, 50 MHz TO 2.1 GHz SINGLE FRACTIONAL-N FREQUENCY SYNTHESIZER The unit operates with a three-wire, high-speed serial interface. A upconverters, and IF filters from the transmitter portion of the combination of large bandwidth, fine resolution, and the three radio system. wire interface allows for direct frequency modulation of the VCO. Figure 1 shows a functional block diagram for the SKY72310-11. This supports any continuous phase, constant envelope The device package and pinout for the 24-pin Multi-Chip Module modulation scheme such as Frequency Modulation (FM), (MCM) package are shown in Figure 2. Signal pin assignments Frequency Shift Keying (FSK), Minimum Shift Keying (MSK), or and functional pin descriptions are described in Table 1. Gaussian Minimum Shift Keying (GMSK). This capability can eliminate the need for In-phase and Quadrature (I/Q) Digital-to-Analog Converters (DACs), quadrature Figure 1. SKY72310-11 Functional Block Diagram Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 August 2, 2019 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 203639I