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Manufacturer / Brand: AD
Details: Multiservice Clock Generator
Series: AD9551
Quantity Available: Over 20610 pieces

Datasheet for AD9551:

AD9551 datasheet
Price for AD9551
Product Parameters
  • Manufacturer Part Number : AD9551
  • Manufacturer : AD
  • Description : Multiservice Clock Generator
  • Series : AD9551
  • Reference Price : USD 0
  • Our Price : We have a better price, contact us by email
  • Product Type : Clock Generation & Distribution
  • Function : Clock Generation Devices
  • Current Suggest : Last Time Buy
  • Status : Obsolete
  • RoHS Status: -
  • Voltage: -
  • Feature: -
  • Package Case: -
  • Temperature Range: -
  • Packing: Reel/Tray/Tube
  • Standard Packing Quantity: -
  • Country of Origin: -
  • Other Part Number : AD9551
  • Shipping methods : DHL FEDEX UPS TNT
  • Delivery Time : Ship within 1 day.
  • Manufacturer Production time : 6-8 weeks (Normally have stocks)
  • Weight : 0.001KG

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Features and Benefits of AD9551
Product Detailed Description for AD9551
The AD9551 accepts one or two reference input signals to synthe-size one or two output signals. The AD9551 uses a fractional-N PLL that precisely translates the reference frequency to the desired output frequency. The input receivers and output drivers provide both single-ended and differential operation.

Reference conditioning and switchover circuitry internally synchronizes the two references so that if one reference fails, there is virtually no phase perturbation at the output.

The AD9551 uses an external crystal and an internal DCXO to provide for holdover operation. If both references fail, the device maintains a steady output signal.

The AD9551 provides pin-selectable, preset divider values for standard (and FEC adjusted) network frequencies. The pin-selectable frequencies include any combination of 15 possible input frequencies and 16 possible output frequencies. A SPI interface provides further flexibility by making it possible to program almost any rational input/output frequency ratio.

The AD9551 is a clock generator that employs fractional-N-based phase-locked loops (PLL) using sigma-delta (Σ-Δ) modulators (SDMs). The fractional frequency synthesis capability enables the device to meet the frequency and feature requirements for multiservice switch applications. The AD9551 precisely generates a wide range of standard frequencies when using any one of those same standard frequencies as a timing base (reference). The primary challenge of this function is the precise generation of the desired output frequency because even a slight output frequency error can cause problems for downstream clocking circuits in the form of bit or cycle slips. The requirement for exact frequency translation in such applications necessitates the use of a frac-tional-N-based PLL architecture with variable modulus.

Applications
  • Multiservice switches
  • Multiservice routers
  • Exact network clock frequency translation
  • General-purpose frequency translation
Lifecycle information of AD9551

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

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