SP4740 ZARLINK | Alldatasheet

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The SP4740 4256 prescaler is one of GPS’ range of high speed dividers for consumer frequency synthesis and measurement systems. It has a low supply current, giving reduced dissipation and operating temperatures in an 8-pin plastic DIL (DP8) or miniature plastic DIL (MP8) package. Spurious radiation has been reduced from all stages. The SP4740 incorporates an on-chip preamplifier with differential inputs and has a TTL/CMOS compatible output.

FEATURES

■ Low Supply Current ■ Low Radiation ■ Input Wideband Amplifier ■ High Input Sensitivity ■ High Input Impedance ■ TTL/CMOS Output ■ Electrostatic Protection † † ESD precautions must be observed SP4740 1·3GHz 44256 PRESCALER WITH LOW CURRENT AND LOW RADIATION 3062-2.2 Fig. 2 SP4740 block diagram Fig 1. Pin connections - top view INPUT VCC OUTPUT SP4740 VCC SP4740 OUTPUT V CC VCC INPUT DP8 MP8 VCC DIFFERENTIAL INPUT OUTPUT 600 4256 VCC 17V 2·5V p-p 255°C to 1150°C 0°C to180°C ABSOLUTE MAXIMUM RATINGS Supply voltage, VCC Input voltage Storage temperature Operating temperature range ORDERING IFORMATION SP4740 NA DP SP4740 NA MP

ELECTRICAL CHARACTERISTICS

These characteristics are guaranteed over the following conditions (unless otherwise stated): TAMB = 0°C to 170°C, VCC = 4·5V to 5·5V (Test circuit see Fig. 3) Characteristic Supply current, ICC Input sensitivity 50MHz 150MHz to 1000MHz 1·1GHz 1·2GHz 1·3GHz Input overload Input impedance Output voltage High Low Conditions Value Typ. Max.Min. Units 0·1 mA mV mV mV mV mV mV mV Ω pF V V 2,3 2,3 2,3 300 400 3·3 1·5 Pin V CC = 15V RMS sinewave 50MHz to 500MHz 500MHz to 1·3GHz See Fig. 6 Sourcing 0·2mA Sinking 2mA NOTE The difference between the maximum input sensitivity and minimum overload voltage is the guaranteed dynamic range. Input signal levels should be maintained within these limits at all frequencies. Fig. 3 Test circuit Fig. 4 Application circuit 180° HYBRID COUPLER OUTPUT A 50 Ω SIGNAL GENERATOR B C D 50 Ω SAMPLING SCOPE SP4740 15V 0·1 µ 115V 6·5k 1·65k 12p 15V 0·1 µ CMOS OR TTL GATE 100p

1 TURN

50Ω SOURCE SP4740

0 200 400 600 800 1000 1200 1400 1600 FREQUENCY (MHz) VIN (mV RMS INTO 50Ω ) TYPICAL DEVICE SPECIFICATION LIMIT Fig. 5 Typical input sensitivity Fig. 6 Typical input impedance (frequencies in MHz) j0.5 j0.2 2j0.2 2j0.5 2j1 2j2 10.50.2 2j5 2 5 1000 200 400600 800 S11 ZO = 50Ω 1300

GEC PLESSEY SEMICONDUCTORS Cheney Manor, Swindon, Wiltshire SN2 2QW, United Kingdom. Tel: (0793) 518000 Fax: (0793) 518411 GEC PLESSEY SEMICONDUCTORS P.O. Box 660017

1500 Green Hills Road,

Scotts Valley, California 95067-0017, United States of America. Tel: (408) 438 2900 Fax: (408) 438 5576 CUSTOMER SERVICE CENTRES

  • FRANCE & BENELUX Les Ulis Cedex Tel: (1) 64 46 23 45 Tx: 602858F Fax : (1) 64 46 06 07
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  • ITALY Milan Tel: (02) 66040867 Fax: (02) 66040993
  • JAPAN Tokyo Tel: (03) 3296-0281 Fax: (03) 3296-0228
  • NORTH AMERICA Integrated Circuits and Microwave Products Scotts Valley, USA Tel (408) 438 2900 Fax: (408) 438 7023. Hybrid Products, Farmingdale, USA Tel (516) 293 8686 Fax: (516) 293 0061.
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  • UNITED KINGDOM & SCANDINAVIA Swindon Tel: (0793) 518510 Tx: 444410 Fax : (0793) 518582 These are supported by Agents and Distributors in major countries world-wide.  GEC Plessey Semiconductors 1996 Publication No. DS3062 Issue No. 2.2 May 1996 This publication is issued to provide information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. The Company reserves the right to alter without prior knowledge the specification, design or price of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to the Company's conditions of sale, which are available on request.

www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor o r its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any licen se, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchaser s of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, t heir specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility t o fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not b een superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink’s conditions of sale which are available on request. Purchase of Zarlink’s I2C components conveys a licence under the Philips I 2C Patent rights to use these components in an I 2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2002, Zarlink Semiconductor Inc. All Rights Reserved. TECHNICAL DOCUMENTATION - NOT FOR RESALE For more information about all Zarlink products visit our Web Site at