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 Prix 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
N° de stock RS 160-2710
Référence fabricantHMC830LP6GE
15,59 €
Each (On a Reel of 50)
Unité
- - - 3000MHz Surface Mount 1 25MHz QFN 105 mA 40 6.1 x 6.1 x 0.9mm 3000MHz 0.9mm 6.1mm
N° de stock RS 862-6458
Référence fabricantHMC830LP6GE
18,22 €
Each
Unité
- - - 3000MHz Surface Mount 1 25MHz QFN 105 mA 40 6.1 x 6.1 x 0.9mm 3000MHz 0.9mm 6.1mm
N° de stock RS 662-4595
Référence fabricantCD74HCT4046AM
0,406 €
Each (In a Pack of 10)
Unité
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
N° de stock RS 168-5010
Référence fabricantLMX2581SQE/NOPB
5,735 €
Each (On a Reel of 250)
Unité
- - - 3760MHz Surface Mount 4 50MHz WQFN 134 mA 32 5 x 5 x 0.8mm 900MHz 0.8mm 5mm
N° de stock RS 178-9154
Référence fabricantCD74HCT4046AM
0,398 €
Each (In a Tube of 40)
Unité
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
N° de stock RS 133-0680
Référence fabricantLMX2581SQE/NOPB
5,84 €
Each
Unité
- - - 3760MHz Surface Mount 4 50MHz WQFN 134 mA 32 5 x 5 x 0.8mm 900MHz 0.8mm 5mm
N° de stock RS 162-8970
Référence fabricantNB3N3020DTG
6,061 €
Each (In a Tube of 96)
Unité
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
N° de stock RS 145-1118
Référence fabricantCD4046BPW
0,363 €
Each (In a Tube of 90)
Unité
- - - 1.6 MHz, 2.4 MHz Surface Mount 1 0.8 MHz, 1.4 MHz TSSOP 0.1 → 1 μA 16 5.1 x 4.5 x 1.05mm 1.4MHz 1.05mm 5.1mm
N° de stock RS 162-6951
Référence fabricantCD74HC4046AM96
0,191 €
Each (On a Reel of 2500)
Unité
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
N° de stock RS 802-2014
Référence fabricantNB3N3020DTG
7,20 €
Each
Unité
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
N° de stock RS 809-6191
Référence fabricantCD4046BPW
0,371 €
Each (In a Pack of 15)
Unité
- - - 1.6 MHz, 2.4 MHz Surface Mount 1 0.8 MHz, 1.4 MHz TSSOP 0.1 → 1 μA 16 5.1 x 4.5 x 1.05mm 1.4MHz 1.05mm 5.1mm
N° de stock RS 708-9943
Référence fabricantADF4108BCPZ
6,67 €
Each
Unité
- - - 325MHz Surface Mount 1 - CP 20 1 17 mA 20 4 x 4 x 0.83mm 8000MHz 0.83mm 4mm
N° de stock RS 923-6693
Référence fabricantCD4046BE
0,413 €
Each (In a Tube of 25)
Unité
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
N° de stock RS 709-1965
Référence fabricantCD4046BE
0,443 €
Each (In a Pack of 10)
Unité
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
N° de stock RS 523-7869
Référence fabricantAD9832BRUZ
10,33 €
Each
Unité
Digital Synthesizer 25000ksps 10 bit - Surface Mount - - TSSOP - 16 5 x 4.4 x 1.05mm - 1.05mm 5mm
N° de stock RS 412-933
Référence fabricantAD9850BRSZ
24,17 €
Each
Unité
Digital Synthesizer 125000ksps 10 bit - Surface Mount - - SSOP - 28 10.2 x 5.3 x 1.75mm - 1.75mm 10.2mm
N° de stock RS 709-4807
Référence fabricantAD5932YRUZ
9,29 €
Each
Unité
- - - - Surface Mount - - TSSOP - 16 5 x 4.4 x 1.05mm - 1.05mm 5mm
N° de stock RS 662-3961
Référence fabricantCD74HC4046AM96
0,406 €
Each (In a Pack of 10)
Unité
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
N° de stock RS 161-2838
Référence fabricantSi52208-A01AGM
MarqueSilicon Labs
2,807 €
Each (In a Tray of 490)
Unité
- - - 100MHz Surface Mount 4 - QFN 63 mA 48 6 x 6 x 0.85mm 25MHz 0.85mm 6mm
N° de stock RS 620-2173
Référence fabricantCDCVF25084PW
4,68 €
Each
Unité
- - - 180MHz Surface Mount 1 10MHz TSSOP - 16 5 x 4.4 x 1.15mm 45MHz 1.15mm 5mm