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. 806-3179
Mfr. Part No.MC14046BDWG
Brandonsemi
MYR4.565
Each (In a Pack of 20)
units
- - - 0.7MHz Surface Mount - 0.5MHz SOIC ±1 μA 16 10.45 x 7.6 x 2.4mm - 2.4mm 10.45mm
RS Stock No. 796-0344
Mfr. Part No.Si5356A-B-GM
MYR25.66
Each (In a Pack of 2)
units
- - - 200MHz Surface Mount - 1MHz QFN 60 mA 24 4 x 4 x 0.85mm 200MHz 0.85mm 4mm
RS Stock No. 162-6951
Mfr. Part No.CD74HC4046AM96
MYR1.418
Each (On a Reel of 2500)
units
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS Stock No. 912-8217
Mfr. Part No.AD9837ACPZ-RL7
MYR12.937
Each (On a Reel of 1500)
units
Direct Synthesizer 16Msps 10 bit 5MHz Surface Mount - - LFCSP WD - 10 3.1 x 3.1 x 0.8mm - 0.8mm 3.1mm
RS Stock No. 168-9977
Mfr. Part No.SI5356A-B-GM
MYR23.51
Each (In a Tray of 75)
units
- - - 200MHz Surface Mount - 1MHz QFN 60 mA 24 4 x 4 x 0.85mm 200MHz 0.85mm 4mm
RS Stock No. 709-1965
Mfr. Part No.CD4046BE
MYR2.457
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. 662-3961
Mfr. Part No.CD74HC4046AM96
MYR2.499
Each (In a Pack of 10)
units
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS Stock No. 709-4807
Mfr. Part No.AD5932YRUZ
MYR49.69
Each
units
- - - - Surface Mount - - TSSOP - 16 5 x 4.4 x 1.05mm - 1.05mm 5mm
RS Stock No. 145-2977
Mfr. Part No.MC14046BDWG
Brandonsemi
MYR2.968
Each (In a Tube of 47)
units
- - - 0.7MHz Surface Mount - 0.5MHz SOIC ±1 μA 16 10.45 x 7.6 x 2.4mm - 2.4mm 10.45mm
RS Stock No. 923-6693
Mfr. Part No.CD4046BE
MYR1.59
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. 809-9705
Mfr. Part No.AD9837ACPZ-RL7
MYR17.52
Each (In a Pack of 2)
units
Direct Synthesizer 16Msps 10 bit 5MHz Surface Mount - - LFCSP WD - 10 3.1 x 3.1 x 0.8mm - 0.8mm 3.1mm
RS Stock No. 709-7461
Mfr. Part No.AD9834CRUZ
MYR60.36
Each
units
Digital Synthesizer 75Msps 10 bit - Surface Mount - - TSSOP - 20 6.5 x 4.4 x 1.05mm - 1.05mm 6.5mm
RS Stock No. 802-2077
Mfr. Part No.NBC12439AMNG
Brandonsemi
MYR57.54
Each
units
- - - 800MHz Surface Mount 1 400MHz QFN 85 mA 32 5 x 5 x 0.95mm 20MHz 0.95mm 5mm
RS Stock No. 160-2710
Mfr. Part No.HMC830LP6GE
MYR86.30
Each (On a Reel of 50)
units
- - - 3000MHz Surface Mount 1 25MHz QFN 105 mA 40 6.1 x 6.1 x 0.9mm 3000MHz 0.9mm 6.1mm
RS Stock No. 807-1791
Mfr. Part No.ADF4153YRUZ
MYR35.52
Each
units
- - - 1750MHz Surface Mount 1 - TSSOP 24 mA 16 5.1 x 4.5 x 1.05mm 4GHz 1.05mm 5.1mm
RS Stock No. 909-3468
Mfr. Part No.HMC703LP4E
MYR154.97
Each
units
- - - - Surface Mount 1 - QFN 95 mA 24 4.1 x 4.1 x 0.95mm 8000MHz 0.95mm 4.1mm
RS Stock No. 716-5808
Mfr. Part No.CS2000CP-CZZ
MYR41.16
Each
units
- - - 75MHz Surface Mount 1 6MHz MSOP 18 mA 10 3 x 3 x 0.95mm 30MHz 0.95mm 3mm
RS Stock No. 538-5378
Mfr. Part No.AD9859YSVZ
MYR107.27
Each
units
Digital Synthesizer 400Msps 10 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 217-7874
Mfr. Part No.5V41066PGGI
MYR12.382
Each (In a Tube of 74)
units
Digital Synthesiser - - 200MHz Surface Mount 4 - TSSOP - 20 - - - -
RS Stock No. 523-6383
Mfr. Part No.ADF4113BRUZ
MYR30.33
Each
units
- - - - Surface Mount 1 - CP 20 11 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm