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. 523-7162
Mfr. Part No.ADF4001BRUZ
HK$43.82
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. 523-6383
Mfr. Part No.ADF4113BRUZ
HK$57.83
Each
units
- - - - Surface Mount 1 - CP 20 11 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS Stock No. 523-8222
Mfr. Part No.AD9830ASTZ
HK$251.10
Each
units
Digital Synthesizer 50Msps 10 bit - Surface Mount - - LQFP - 48 7 x 7 x 1.4mm - 1.4mm 7mm
RS Stock No. 523-7516
Mfr. Part No.AD9831ASTZ
HK$131.77
Each
units
Digital Synthesizer 25000ksps 10 bit - Surface Mount - - LQFP - 48 7 x 7 x 1.4mm - 1.4mm 7mm
RS Stock No. 160-3297
Mfr. Part No.HMC703LP4E
HK$235.149
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. 538-5930
Mfr. Part No.AD9954YSVZ
HK$335.04
Each
units
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 108-353
Mfr. Part No.ADF4252BCPZ
HK$57.20
Each
units
- - - - Surface Mount 2 - CP 24 16 mA 24 4 x 4 x 0.83mm 3000MHz 0.83mm 4mm
RS Stock No. 909-3468
Mfr. Part No.HMC703LP4E
HK$279.25
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. 759-2749
Mfr. Part No.ADF4350BCPZ
HK$119.84
Each
units
- - - 4400MHz Surface Mount 2 137.5MHz LFCSP VQ 110 mA 32 5 x 5 x 1mm 4400MHz 1mm 5mm
RS Stock No. 160-2676
Mfr. Part No.HMC832LP6GE
HK$183.053
Each (On a Reel of 50)
units
- - - 3000MHz Surface Mount 1 25MHz SMD 237 mA 40 6.1 x 6.1 x 0.9mm 3000MHz 0.9mm 6.1mm
RS Stock No. 708-9827
Mfr. Part No.ADN2814ACPZ
HK$207.99
Each
units
- - - - Surface Mount 1 - LFCSP 145 mA 32 5 x 5 x 0.83mm 160MHz 0.83mm 5mm
RS Stock No. 538-6179
Mfr. Part No.ADF4360-1BCPZ
HK$68.65
Each
units
- - - 2450MHz Surface Mount 1 2050MHz CP 24 - 24 4 x 4 x 0.83mm 250MHz 0.83mm 4mm
RS Stock No. 759-1503
Mfr. Part No.AD9911BCPZ
HK$315.64
Each
units
Direct Synthesizer 500Msps 32 bit - Surface Mount - - LFCSP VQ - 56 8 x 8 x 1mm - 1mm 8mm
RS Stock No. 912-6319
Mfr. Part No.AD9910BSVZ
HK$479.383
Each (In a Tray of 90)
units
Digital Synthesizer 1000000ksps 14 bit - Surface Mount - - TQFP - 100 14 x 14 x 1mm - 1mm 14mm
RS Stock No. 807-1776
Mfr. Part No.ADF4151BCPZ
HK$54.91
Each
units
- - - 750MHz Surface Mount 1 - LFCSP 50 mA 32 5.1 x 5.1 x 0.75mm 3.5GHz 0.75mm 5.1mm
RS Stock No. 809-9364
Mfr. Part No.AD9838BCPZ-RL7
HK$54.26
Each
units
Direct Synthesizer 16Msps 10 bit 16MHz Surface Mount - - LFCSP WD - 20 4.1 x 4.1 x 0.75mm - 0.75mm 4.1mm
RS Stock No. 538-4684
Mfr. Part No.ADF4112BRUZ
HK$56.73
Each
units
- - - - Surface Mount 1 - TSSOP 7.5 mA 16 5 x 4.4 x 1.05mm 3000MHz 1.05mm 5mm
RS Stock No. 807-1798
Mfr. Part No.ADF4159CCPZ
HK$138.56
Each
units
- - - 2GHz Surface Mount 1 - LFCSP 40 mA 24 4.1 x 4.1 x 0.75mm 13GHz 0.75mm 4.1mm
RS Stock No. 538-5378
Mfr. Part No.AD9859YSVZ
HK$213.61
Each
units
Digital Synthesizer 400Msps 10 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 183-2473
Mfr. Part No.HMC834LP6GE
HK$198.51
Each
units
- - - 8400MHz Surface Mount 1 45MHz SMT 8 mA 40 6.1 x 6.1 x 0.85mm 4200MHz 0.85mm 6.1mm