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. 809-9705
Mfr. Part No.AD9837ACPZ-RL7
kr 40,985
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. 912-8217
Mfr. Part No.AD9837ACPZ-RL7
kr 23,724
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. 697-7561
Mfr. Part No.ADF4360-8BCPZ
kr 65,01
Each
Units
Integrated Synthesizer - - - Surface Mount - - LFCSP - 24 4 x 4 x 0.83mm - 0.83mm 4mm
RS Stock No. 538-5930
Mfr. Part No.AD9954YSVZ
kr 349,84
Each
Units
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 880-6976
Mfr. Part No.Si5341A-D-GM
kr 198,40
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. 708-9934
Mfr. Part No.AD9854ASTZ
kr 382,13
Each
Units
Digital Synthesizer 200Msps 12 bit - Surface Mount - - LQFP - 80 14 x 14 x 1.4mm - 1.4mm 14mm
RS Stock No. 922-2243
Mfr. Part No.LMX2485ESQ/NOPB
kr 32,641
Each (On a Reel of 1000)
Units
- - - 3000MHz Surface Mount 3 50MHz LLP 5 mA 24 4 x 4 x 0.8mm 110 MHz, 800MHz 0.8mm 4mm
RS Stock No. 796-8710
Mfr. Part No.ADF4351BCPZ
kr 134,81
Each
Units
- - - 4400MHz Surface Mount 1 35MHz LFCSP 27 mA 32 5 x 4.75 x 0.95mm 250MHz 0.95mm 5mm
RS Stock No. 807-1791
Mfr. Part No.ADF4153YRUZ
kr 40,71
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. 761-6438
Mfr. Part No.LMX2485ESQ/NOPB
kr 58,38
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. 538-5384
Mfr. Part No.AD9952YSVZ
kr 298,53
Each
Units
Digital Synthesizer 400Msps 14 bit - Surface Mount - - TQFP - 48 7 x 7 x 1mm - 1mm 7mm
RS Stock No. 709-2508
Mfr. Part No.TLC2932AIPW
kr 19,04
Each
Units
- - - - Surface Mount 1 - TSSOP - 14 5 x 4.4 x 1.15mm - 1.15mm 5mm
RS Stock No. 817-5994
Mfr. Part No.CDCM61004RHBT
kr 88,38
1 Tape of 1
Tape(s)
- - - 683.264MHz Surface Mount 4 43.75MHz VQFN 65 mA 32 5.15 x 5.15 x 0.95mm 28.47MHz 0.95mm 5.15mm
RS Stock No. 161-2842
Mfr. Part No.Si5332A-C-GM1
kr 106,982
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. 186-9049
Mfr. Part No.FS6377-01IG-XTD
kr 102,209
Each (In a Tube of 48)
Units
- - - 150MHz Surface Mount 4 0.8MHz SOIC 43 mA 16 9.98 x 3.99 x 1.55mm 230MHz 1.55mm 9.98mm
New
RS Stock No. 217-7876
Mfr. Part No.5V41068APGGI
kr 40,067
Each (In a Tube of 96)
Units
Digital Synthesiser - - - Surface Mount 1 - TSSOP - 16 - - - -
RS Stock No. 802-2077
Mfr. Part No.NBC12439AMNG
kr 109,91
Each
Units
- - - 800MHz Surface Mount 1 400MHz QFN 85 mA 32 5 x 5 x 0.95mm 20MHz 0.95mm 5mm
RS Stock No. 662-3961
Mfr. Part No.CD74HC4046AM96
kr 4,86
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. 161-2843
Mfr. Part No.Si5332A-C-GM2
kr 123,713
Each (In a Tray of 490)
Units
- - - 312.5MHz Surface Mount 10 5MHz QFN 70 mA 40 6 x 6 x 0.85mm 50 MHz, 170 MHz, 250MHz 0.85mm 6mm
RS Stock No. 160-3297
Mfr. Part No.HMC703LP4E
kr 236,136
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