SKY72302-21

Clock Generators, PLLs, Frequency Synthesizers Overview

The SKY72302-21 is a spur-free, dual fractional-N frequency synthesizer manufactured by Skyworks Solutions. It supports a maximum operating frequency of 6.1 GHz with an auxiliary synthesizer limit of 1000 MHz. The device features an ultra-fine step size of 400 Hz or less and achieves switching speeds below 100 ps. Phase noise reaches -80 dBc/Hz at 6100 MHz within the loop filter bandwidth. It operates on a 3 V supply and provides a 5 V output to the loop filter. The component is housed in a 28-pin EP-TSSOP package measuring 9.7 x 6.4 x 1.1 mm.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Dual fractional-N architecture with independent main and auxiliary synthesizers for flexible system design.
• Direct digital modulation capability supporting continuous phase schemes like FM, FSK, MSK, and GMSK without external DACs.
• Integrated low-noise crystal oscillator with programmable reference dividers up to 32x.
• Frequency power steering circuitry enhances rapid acquisition times compared to conventional lock detection.

Clock Generators, PLLs, Frequency Synthesizers Applications

• General purpose RF systems
• 2.5G and 3G wireless infrastructures
• Broadband wireless access networks
• Low bit rate wireless telemetry
• Wireless Local Loop (WLL) equipment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against official Skyworks documentation to confirm pinout and electrical characteristics. Confirm RoHS compliance status and moisture sensitivity level requirements prior to assembly. Ensure the supplier provides valid traceability documents matching the manufacturer's part identification.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing radio systems requiring ultra-fine frequency resolution and fast switching speeds. The integrated crystal oscillator reduces external component count. Verify that the required VCO frequencies fall within the 6.1 GHz operational limit and that the serial interface timing meets the system controller specifications.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This device belongs to the Skyworks dual synthesizer family designed for high-performance radio applications. It shares functional similarities with the SKY72300 and SKY72301 series but offers specific frequency ranges and modulation capabilities tailored for narrowband and broadband wireless standards.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet. Evaluate alternative Skyworks dual synthesizers based on frequency range and package compatibility if direct replacement is required.

Clock Generators, PLLs, Frequency Synthesizers FAQ

What modulation schemes does the SKY72302-21 support?

It supports any continuous phase, constant envelope modulation scheme such as Frequency Modulation (FM), Frequency Shift Keying (FSK), Minimum Shift Keying (MSK), and Gaussian Minimum Shift Keying (GMSK).

How is the serial interface configured?

The device uses a three-wire high-speed serial interface consisting of Clock, Data, and CS pins, allowing communication with microcontrollers or microprocessors.

What is the function of the LD/PSmain pin?

The LD/PSmain pin can be configured for either lock detection (active-low open collector) or frequency power steering to enhance rapid acquisition time.