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. 802-2014
Mfr. Part No.NB3N3020DTG
SGD12.55
Each
units
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
RS Stock No. 709-5131
Mfr. Part No.ADF4111BRUZ
SGD9.03
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. 161-2866
Mfr. Part No.Si52204-A01AGM
SGD4.40
Each (In a Pack of 2)
units
- - - 100MHz Surface Mount 3 - QFN 44 mA 32 5 x 5 x 0.85mm 25MHz 0.85mm 5mm
RS Stock No. 161-2842
Mfr. Part No.Si5332A-C-GM1
SGD15.571
Each (In a Tray of 490)
units
- - - 312.5MHz Surface Mount 7 5MHz QFN 70 mA 32 5 x 5 x 0.85mm 50 MHz, 170 MHz, 250MHz 0.85mm 5mm
RS Stock No. 880-6976
Mfr. Part No.Si5341A-D-GM
SGD31.00
Each
units
- - - 712.5MHz Surface Mount 1 0.0001MHz QFN 150 mA 64 9 x 9 x 0.85mm 750MHz 0.85mm 9mm
RS Stock No. 697-7568
Mfr. Part No.ADF4360-7BCPZ
SGD10.69
Each
units
- - - 1800MHz Surface Mount 1 350MHz CP 24 - 24 4 x 4 x 0.83mm 250MHz 0.83mm 4mm
RS Stock No. 827-0673
Mfr. Part No.NB3N51032DTG
SGD6.53
Each (In a Pack of 2)
units
- - - 200MHz Surface Mount 2 25MHz TSSOP 100 mA 16 5.1 x 4.5 x 1.05mm 25MHz 1.05mm 5.1mm
RS Stock No. 162-6986
Mfr. Part No.CDCE706PW
SGD12.34
Each (In a Tube of 70)
units
- - - - Surface Mount 3 - TSSOP 115 mA 20 6.5 x 4.4 x 1.15mm 200MHz 1.15mm 6.5mm
RS Stock No. 523-7162
Mfr. Part No.ADF4001BRUZ
SGD6.82
Each
units
- - - - Surface Mount 1 - CP 20 5.5 mA 16 5 x 4.4 x 1.05mm 200MHz 1.05mm 5mm
RS Stock No. 125-6940
Mfr. Part No.CY22150FZXC
SGD13.305
Each (In a Pack of 2)
units
- - - - - - - - - - - - - -
RS Stock No. 496-7812
Mfr. Part No.AD9951YSVZ
SGD43.97
Each
units
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 162-8142
Mfr. Part No.CDCM61002RHBT
SGD6.752
Each (On a Reel of 250)
units
- - - 683.264MHz Surface Mount 2 43.75MHz VQFN 65 mA 32 5.15 x 5.15 x 0.95mm 28.47MHz 0.95mm 5.15mm
RS Stock No. 538-5384
Mfr. Part No.AD9952YSVZ
SGD49.58
Each
units
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 160-3297
Mfr. Part No.HMC703LP4E
SGD39.49
Each (On a Reel of 50)
units
- - - - Surface Mount 1 - QFN 95 mA 24 4.1 x 4.1 x 0.95mm 8000MHz 0.95mm 4.1mm
RS Stock No. 161-2870
Mfr. Part No.Si5332A-C-GM1
SGD17.82
Each
units
- - - 312.5MHz Surface Mount 7 5MHz QFN 70 mA 32 5 x 5 x 0.85mm 50 MHz, 170 MHz, 250MHz 0.85mm 5mm
RS Stock No. 523-6383
Mfr. Part No.ADF4113BRUZ
SGD9.13
Each
units
- - - - Surface Mount 1 - CP 20 11 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS Stock No. 921-2820
Mfr. Part No.LMH1982SQE/NOPB
SGD37.371
Each (On a Reel of 250)
units
- - - 148.5MHz Surface Mount 1 - WQFN 70 mA 32 5 x 5 x 0.8mm 67.5MHz 0.8mm 5mm
RS Stock No. 162-5220
Mfr. Part No.PLL1708DBQ
SGD7.342
Each (In a Tube of 50)
units
- - - - Surface Mount 2 - SSOP 25 mA 20 8.75 x 4 x 1.5mm 27.27MHz 1.5mm 8.75mm
RS Stock No. 709-5140
Mfr. Part No.ADF4154BRUZ
SGD9.86
Each
units
- - - - Surface Mount 1 - CP 20 1 24 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS Stock No. 807-1794
Mfr. Part No.ADF4157BCPZ
SGD11.46
Each
units
- - - 5800MHz Surface Mount 1 - LFCSP 29 mA 20 4.1 x 4.1 x 0.75mm 6GHz 0.75mm 4.1mm