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. 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. 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. 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. 880-6976
Mfr. Part No.Si5341A-D-GM
kr 180,36
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. 761-6438
Mfr. Part No.LMX2485ESQ/NOPB
kr 53,05
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. 922-2243
Mfr. Part No.LMX2485ESQ/NOPB
kr 28,646
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. 807-1791
Mfr. Part No.ADF4153YRUZ
kr 43,80
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. 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. 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. 806-3179
Mfr. Part No.MC14046BDWG
kr 6,409
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. 412-933
Mfr. Part No.AD9850BRSZ
kr 255,15
Each
Units
Digital Synthesizer 125000ksps 10 bit - Surface Mount - - SSOP - 28 10.2 x 5.3 x 1.75mm - 1.75mm 10.2mm
RS Stock No. 759-2749
Mfr. Part No.ADF4350BCPZ
kr 119,48
Each
Units
- - - 4400MHz Surface Mount 2 137.5MHz LFCSP VQ 110 mA 32 5 x 5 x 1mm 4400MHz 1mm 5mm
RS Stock No. 162-6951
Mfr. Part No.CD74HC4046AM96
kr 2,059
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. 708-9943
Mfr. Part No.ADF4108BCPZ
kr 72,51
Each
Units
- - - 325MHz Surface Mount 1 - CP 20 1 17 mA 20 4 x 4 x 0.83mm 8000MHz 0.83mm 4mm
RS Stock No. 162-5219
Mfr. Part No.PLL1705DBQ
kr 40,77
Each (In a Tube of 50)
Units
- - - - Surface Mount 2 - SSOP 25 mA 20 8.74 x 3.99 x 1.5mm 27MHz 1.5mm 8.74mm
RS Stock No. 809-9364
Mfr. Part No.AD9838BCPZ-RL7
kr 56,75
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. 923-6778
Mfr. Part No.TLC2932AIPW
kr 18,022
Each (In a Tube of 90)
Units
- - - - Surface Mount 1 - TSSOP - 14 5 x 4.4 x 1.15mm - 1.15mm 5mm
RS Stock No. 169-8384
Mfr. Part No.CS2000CP-CZZ
kr 66,418
Each (In a Tube of 96)
Units
- - - 75MHz Surface Mount 1 6MHz MSOP 18 mA 10 3 x 3 x 0.95mm 30MHz 0.95mm 3mm