ADCLK950

RECOMMENDED FOR NEW DESIGNS

Two Selectable Inputs, 10 LVPECL Outputs, SiGe Clock Fanout Buffer

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Overview

  • 2 selectable differential inputs
  • 4.8 GHz operating frequency
  • 75 fs rms broadband random jitter
  • On-chip input terminations
  • 3.3 V power supply

The ADCLK950 is an ultrafast clock fanout buffer fabricated on the Analog Devices, Inc., proprietary XFCB3 silicon germanium (SiGe) bipolar process. This device is designed for high speed applications requiring low jitter.

The device has two selectable differential inputs via the IN_SEL control pin. Both inputs are equipped with center tapped, differential, 100 Ω on-chip termination resistors. The inputs accept dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), and ac-coupled 1.8 V CMOS, LVDS, and LVPECL inputs. A VREFx pin is available for biasing ac-coupled inputs.

The ADCLK950 features 10 full-swing emitter coupled logic (ECL) output drivers. For LVPECL (positive ECL) operation, bias VCC to the positive supply and VEE to ground. For ECL operation, bias VCC to ground and VEE to the negative supply.

The output stages are designed to directly drive 800 mV each side into 50 Ω terminated to VCC − 2 V for a total differential output swing of 1.6 V.

The ADCLK950 is available in a 40-lead LFCSP and specified for operation over the standard industrial temperature range of −40°C to +85°C.

Applications

  • Low jitter clock distribution
  • Clock and data signal restoration
  • Level translation
  • Wireless communications
  • Wired communications
  • Medical and industrial imaging
  • ATE and high performance instrumentation

ADCLK950
Two Selectable Inputs, 10 LVPECL Outputs, SiGe Clock Fanout Buffer
ADCLK950 Functional Block Diagram ADCLK950 Pin Configuration
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Tools & Simulations

ADIsimCLK Design and Evaluation Software

ADIsimCLK is the design tool developed specifically for Analog Devices' range of ultra-low jitter clock distribution and clock generation products. Whether your application is in wireless infrastructure, instrumentation, networking, broadband, ATE or other areas demanding predictable clock performance, ADIsimCLK will enable you to rapidly develop, evaluate and optimize your design.

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ADCLK950 IBIS Models 1


Evaluation Kits

EVAL-ADCLK950

Setting Up the Evaluation Board for the ADCLK950

Product Details

The user guide describes how to set up and use the evaluation board for the ADCLK950. The ADCLK950 data sheet should be used in conjunction with the user guide.

The data sheet contains full technical details about the specifications and operation of the device.

The ADCLK950 is a very high performance clock fanout buffer. The evaluation board is fabricated using a high quality Rogers dielectric material. Transmission line paths are kept as close to 50 Ω as possible.

EVAL-ADCLK950
Setting Up the Evaluation Board for the ADCLK950

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