ADCLK950 Datasheet, PDF(1/12 Page) Analog Devices – Two Selectable Inputs, 10 LVPECL Outputs, SiGe Clock Fanout Buffer

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

ADCLK950 Datasheet, PDF (1/12 Pages) Analog Devices – Two Selectable Inputs, 10 LVPECL Outputs, SiGe Clock Fanout Buffer

Two Selectable Inputs, 10 LVPECL Outputs,

SiGe Clock Fanout Buffer

ADCLK950

FEATURES

2 selectable differential inputs

4.8 GHz operating frequency

75 fs rms broadband random jitter

On-chip input terminations

3.3 V power supply

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

GENERAL DESCRIPTION

The ADCLK950 is an ultrafast clock fanout buffer fabricated

on the Analog Devices, Inc., proprietary XFCB3 silicon german-

ium (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 Î© 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 Î© terminated to VCC â 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

â40Â°C to +85Â°C.

FUNCTIONAL BLOCK DIAGRAM

ADCLK950

LVPECL

VREF0

REFERENCE

VT0

CLK0

VT1

CLK1

IN_SEL

VREF1

REFERENCE

Figure 1.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

▷