Clock Synthesizers

A clock synthesizer is an electronic circuit that converts a single clock signal frequency into a range of output frequencies. Frequency values are given in MHz. Clock synthesizers can generate frequencies in multiples of the original, also known as a conversion rate. They can work in a phase-locked look, also known as a PLL.

Clock synthesizers are semiconductor devices which come in a standard package, such has a QFN, TSSOP or SOIC.

Where are Clock Synthesizersused used?

  • Wireless devices
  • RF devices
  • Radio
  • GPS
  • TV
  • Mobile phones

What is a PLL Synthesizer?

PLL synthesizers are analogue devices. A PLL circuit features a Voltage-Controlled Oscillator (VCO). The VCO output is constantly adjusted to match the phase and frequency of an input signal, using feedback from a Phase Comparator. A PLL circuit is often used to synchronise (lock) RF receiver circuits to an incoming carrier signal. If a frequency divider integer-n is introduced between the VCO output and the phase comparator, the PLL circuit output frequency will be fin/n, locked in phase to fin. If fin comes from a highly-stable fixed frequency oscillator and n is programmable, then the circuit forms the basis of an accurate Digital Frequency Synthesizer.

What is a Direct Digital Synthesizer?

Direct digital synthesizers (DDS) are digital devices. They are made up of a crystal oscillator, an NCO (numerically controlled oscillator) and a DAC (digital-to-analogue converter). DDS, in comparison to an analogue PLL synthesizer, offer improved phase noise and better control over the output where there are transitions between frequencies. They also offer better jitter performance.


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Description Price Category Conversion Rate Resolution Maximum Output Frequency Mounting Type Number of Elements per Chip Minimum Output Frequency Package Type Maximum Supply Current Pin Count Dimensions Maximum Input Frequency Height Length
RS Stock No. 709-7547
Mfr. Part No.ADF4116BRUZ
€5.53
Each
units
- - - - Surface Mount 1 - TSSOP 5.5 mA 16 5 x 4.4 x 1.05mm 550MHz 1.05mm 5mm
RS Stock No. 709-1965
Mfr. Part No.CD4046BE
€0.443
Each (In a Pack of 10)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 923-6693
Mfr. Part No.CD4046BE
€0.413
Each (In a Tube of 25)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 709-4807
Mfr. Part No.AD5932YRUZ
€9.29
Each
units
- - - - Surface Mount - - TSSOP - 16 5 x 4.4 x 1.05mm - 1.05mm 5mm
RS Stock No. 145-0657
Mfr. Part No.CD74HC4046AE
€0.45
Each (In a Tube of 25)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 662-4589
Mfr. Part No.CD74HC4046AE
€0.45
Each (In a Pack of 10)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 709-5131
Mfr. Part No.ADF4111BRUZ
€2.66
Each
units
- - - - Surface Mount 1 - CP 20 5.5 mA 16 5 x 4.4 x 1.05mm 1400MHz 1.05mm 5mm
RS Stock No. 634-192
Mfr. Part No.CD74HCT297E
€3.11
Each
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 796-0101
Mfr. Part No.Si5326C-C-GM
€17.03
Each
units
- - - 346MHz Surface Mount 4 2kHz QFN 279 mA 36 6 x 6 x 0.85mm 710MHz 0.85mm 6mm
RS Stock No. 709-6011
Mfr. Part No.AD5930YRUZ
€11.44
Each
units
- - - - Surface Mount - - TSSOP - 20 6.5 x 7.6 x 1.05mm - 1.05mm 6.5mm
RS Stock No. 100-0740
Mfr. Part No.CD74HCT297E
€1.415
Each (In a Tube of 25)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 173-2768
Mfr. Part No.SI5326C-C-GM
€16.749
Each (In a Tray of 490)
units
- - - 346MHz Surface Mount 4 2kHz QFN 279 mA 36 6 x 6 x 0.85mm 710MHz 0.85mm 6mm
RS Stock No. 787-6920
Mfr. Part No.NB3N502DG
€2.975
Each (In a Pack of 2)
units
- - - 190MHz Surface Mount 1 14MHz SOIC 20 mA 8 5 x 4 x 1.5mm 50MHz 1.5mm 5mm
RS Stock No. 192-1207
Mfr. Part No.DS1086Z+
€1.49
Each (In a Tube of 100)
units
- - - 133MHz Surface Mount 1 0MHz SOIC 35 mA 8 5 x 4 x 1.5mm 133MHz 1.5mm 5mm
RS Stock No. 483-6724
Mfr. Part No.74HCT4046AD,112
BrandNexperia
€0.694
Each (In a Pack of 5)
units
- - - - Surface Mount 1 - SOIC 50 mA 16 10 x 4 x 1.45mm - 1.45mm 10mm
RS Stock No. 523-6383
Mfr. Part No.ADF4113BRUZ
€5.06
Each
units
- - - - Surface Mount 1 - CP 20 11 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS Stock No. 708-9729
Mfr. Part No.AD9959BCPZ
€53.75
Each
units
Digital Synthesizer 500Msps 10 bit - Surface Mount - - LFCSP - 56 8 x 8 x 0.83mm - 0.83mm 8mm
RS Stock No. 412-715
Mfr. Part No.ADF4153BRUZ
€5.06
Each
units
- - - - Surface Mount 1 - CP 20 24 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS Stock No. 761-6438
Mfr. Part No.LMX2485ESQ/NOPB
€4.88
1 Tape of 1
Tape(s)
- - - 3000MHz Surface Mount 3 50MHz WQFN 5 mA 24 4 x 4 x 0.8mm 110 MHz, 800MHz 0.8mm 4mm
RS Stock No. 807-1794
Mfr. Part No.ADF4157BCPZ
€6.42
Each
units
- - - 5800MHz Surface Mount 1 - LFCSP 29 mA 20 4.1 x 4.1 x 0.75mm 6GHz 0.75mm 4.1mm