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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Omschrijving Prijs 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-stocknr. 759-2749
FabrikantnummerADF4350BCPZ
FabrikantAnalog Devices
€ 10,99
Each
Aantal stuks
- - - 4400MHz Surface Mount 2 137.5MHz LFCSP VQ 110 mA 32 5 x 5 x 1mm 4400MHz 1mm 5mm
RS-stocknr. 538-5930
FabrikantnummerAD9954YSVZ
FabrikantAnalog Devices
€ 32,18
Each
Aantal stuks
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS-stocknr. 796-8710
FabrikantnummerADF4351BCPZ
FabrikantAnalog Devices
€ 12,40
Each
Aantal stuks
- - - 4400MHz Surface Mount 1 35MHz LFCSP 27 mA 32 5 x 4.75 x 0.95mm 250MHz 0.95mm 5mm
RS-stocknr. 178-9154
FabrikantnummerCD74HCT4046AM
€ 0,398
Each (In a Tube of 40)
Aantal stuks
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS-stocknr. 662-4595
FabrikantnummerCD74HCT4046AM
€ 0,406
Each (In a Pack of 10)
Aantal stuks
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS-stocknr. 709-1965
FabrikantnummerCD4046BE
€ 0,443
Each (In a Pack of 10)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 412-715
FabrikantnummerADF4153BRUZ
FabrikantAnalog Devices
€ 5,06
Each
Aantal stuks
- - - - Surface Mount 1 - CP 20 24 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS-stocknr. 923-6693
FabrikantnummerCD4046BE
€ 0,413
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 413-011
FabrikantnummerAD9851BRSZ
FabrikantAnalog Devices
€ 25,72
Each
Aantal stuks
Digital Synthesizer 180000ksps 10 bit - Surface Mount - - SSOP - 28 10.2 x 5.3 x 1.75mm - 1.75mm 10.2mm
RS-stocknr. 650-122
FabrikantnummerCD74HCT7046AE
€ 2,41
Each
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 538-5378
FabrikantnummerAD9859YSVZ
FabrikantAnalog Devices
€ 21,18
Each
Aantal stuks
Digital Synthesizer 400Msps 10 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS-stocknr. 634-192
FabrikantnummerCD74HCT297E
€ 3,11
Each
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 807-1592
FabrikantnummerAD9915BCPZ
FabrikantAnalog Devices
€ 145,09
Each
Aantal stuks
Direct Synthesizer 2.5Gsps 12 bit 1.25GHz Surface Mount - - LFCSP VQ - 88 12.1 x 12.1 x 0.86mm - 0.86mm 12.1mm
RS-stocknr. 697-7568
FabrikantnummerADF4360-7BCPZ
FabrikantAnalog Devices
€ 5,81
Each
Aantal stuks
- - - 1800MHz Surface Mount 1 350MHz CP 24 - 24 4 x 4 x 0.83mm 250MHz 0.83mm 4mm
RS-stocknr. 162-8142
FabrikantnummerCDCM61002RHBT
€ 4,072
Each (On a Reel of 250)
Aantal stuks
- - - 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-stocknr. 412-309
FabrikantnummerAD9835BRUZ
FabrikantAnalog Devices
€ 11,88
Each
Aantal stuks
Digital Synthesizer 50Msps 10 bit - Surface Mount - - TSSOP - 16 5 x 4.4 x 1.05mm - 1.05mm 5mm
RS-stocknr. 100-0740
FabrikantnummerCD74HCT297E
€ 1,404
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 538-5384
FabrikantnummerAD9952YSVZ
FabrikantAnalog Devices
€ 27,46
Each
Aantal stuks
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS-stocknr. 162-4153
FabrikantnummerCD74HCT7046AE
€ 2,053
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 709-4807
FabrikantnummerAD5932YRUZ
FabrikantAnalog Devices
€ 9,29
Each
Aantal stuks
- - - - Surface Mount - - TSSOP - 16 5 x 4.4 x 1.05mm - 1.05mm 5mm