SP5026 ZARLINK | Alldatasheet

Document overview

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Technical content

This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/

Features

  • Complete 1.OGHz Single Chip System
  • Dual Standard 62.5kHz or 31.25 kHz Step Size
  • Low power Consumption (5V 40mA)
  • Function Compatible with Toshiba TD6380 and TD6381*
  • Pin Compatible with SP5510 †
  • Low Radiation
  • Varactor Drive Amplifier Disable
  • Charge Pump Disable
  • Single Port 18/19 Bit Serial Data Entry
  • Four Controllable Outputs
  • ESD Protection † See notes on pin compatibility ‡ Normal ESD handling procedures should be observed

Applications

  • Satellite TV when combined with SP4902 2.5GHz Prescaler
  • Cable tuning systems
  • VCRs

Description

The SP5026 is a programming variant of the SP5510, allowing the design of one tuner with either 1 2C bus or 3-wire bus format depending on which device is inserted. The SP5026, when used with a TV varicap tuner, forms a complete phase locked loop tuning system. The circuit consists of a divider-by-8 prescaler with its own preamplifier and at 5-bit programmable divider controlled by a serially-loaded data register. Four open-collector outputs, each independently programmable, are included. The device has two modes of operation, selected by the “mode select” input. In mode 1, the comparison frequency is 7.8125kHz and the programmable divider MSB is bypassed; mode 2 comparison frequency is 3.90625kHz. The comparison frequencies are both obtained from a 4MHz crystal controlled on-chip oscillator. DS5776 Issue 2 December 2002

Ordering Information

18-lead plastic package) SP5026S MP (16-lead miniature plastic package) SP5026 1.0GHz 3-Wire Bus Controlled Synthesizer Data Sheet Figure 1 - Block Diagram

2 Zarlink Semiconductor Inc. The comparator has a charge pump output with an amplifier stage around which feedback may be applied. Only one external transistor is required for varicap line driving. Figure 2 - Pin Connections - Top View Functional Description The SP5026 contains all the elements necessary, with the exception of reference crystal, loop filter and external high voltage transistor to control a voltage controlled local oscillator, so forming a PLL frequency synthesized source. The system is controlled by a microprocessor via a standard data, clock enable three-wire bus. The data load normally consists of a single word, which contains the frequency and port information and is only transferred to the internal data shift register during an enable high period. The clock input is disabled during enable low periods. New data words are only accepted by the internal data buffers from the shift register on a negative transition of the enable, so giving improved fine tune facility for digital AFC etc. The data sequence and timing follows the format shown in Figure 3. The frequency is set by loading the programmable divider with the required 14/15 bit divisor word. The output of the divider, FPD, is fed to the phase comparator where it is compared in phase and frequency domain to the internal generated comparison frequency, FCOMP.

3Zarlink Semiconductor Inc. The FCCOMP is obtained by dividing the output of an on-chip crystal controlled oscillator. The crystal frequency used is generally 4MHz, which gives an FCOMP of 3.90625kHz/7.815kHz and, when multiplied back up to the synthesized LO, gives a minimum step size of 31.25kHz/62.5kHz, respectively. The programmable divider is preceded by an input RF preamplifier and high speed, low radiation prescaler. The preamplifier is arranged to be self oscillating, so giving excellent input sensitivity. The input sensitivity and impedance are shown in Figure 5 and Figure 7 respectively. The SP5026 contains an improved lock detect circuit which generates a flag when the loop has attained lock. “Out of Lock” is indicated by high impedance state. The SP5026 contains 4 general purpose open collector outputs, ports P1-P4, which are capable of sinking at least 10mA. These outputs are set by the remaining four bits within the normal data word. Pin Compatibility The SP5026 may by used in SP5510 applications which require 3-wire bus as opposed to 1 2C bus data format. In SP5510 applications where the reference crystal is connected to pin 3, a small modification is required to ground the crystal as shown in Figure 4. Appropriate connections to the mode select input (pin 3) must also be made. In mode 1 (pin 3 “HIGH”) the SP5026 is programming and step size compatible with the Toshiba TD6380, and in mode 2 (pin 3 “LOW”) it is compatible with the TD6381.

4 Zarlink Semiconductor Inc. Figure 3 - Data Format and Timing

7Zarlink Semiconductor Inc. Figure 8 - Typical Input Impedance

Electrical Characteristics

Electrical Characteristics Table† Characteristics Symbol Pin Value Units Conditions Min. Typ. Max. Supply current I CC 14 40 55 mA VCC = 5V Prescaler input voltage 15,16 12.5 300 mV RMS 50MHz to 1GHz sinewave Prescaler input impedance 15,16 50 Ω Input capacitance 2 pF High level input voltage 4,5,10 3 V CC V High level input voltage 3 4 V CC V Low level input voltage 3,4,5,10 0 0.7 V High level input current 4,5,10 1 µAV IN = 5.5V, VCC = 5.5V Low level input current 5 5 µAV IN = 0V, VCC = 5.5V Low level input current 4,10 250 µAV IN = 0V, VCC = 5.5V High level input current 3 150 µAV IN = 5.5V, VCC = 5.5V Low level input current 3 1 µAV IN = 0V, VCC = 5.5V

8 Zarlink Semiconductor Inc. These characteristics are guaranteed by either test or design. They apply within the specified ambient temperature and supply voltage unless otherwise stated. Clock input hysteresis 5 0.4 V Clock rate 5 0.5 MHz Data set up time t 2 4 300 ns See Figure 3 Data hold time t 3 4 600 ns See Figure 3 Enable set up time t 1 10 300 ns See Figure 3 Enable hold time t 5 10 600 ns See Figure 3 Clock-to-enable time t 4 10 300 ns See Figure 4 Charge pump output current 1 + 150 µA V pin 1= 2.0V Charge pump output leakage current 1+ 5 nA V pin 1= 2.0V Drift due to leakage 5 mV/s At collector of external varicap drive transistor Charge pump drive output current 18 1 mA V pin 18 = 0.7V Charge pump amplifier gain 6400 Pin 18 Current 100 µA Oscillator temperature stability 2p p m / oC Oscillator stability with supply voltage 2p p m / V Recommended crystal series resistance 10 200 Ω “Parallel resonant” crystal Crystal oscillator drive level 2 40 mV p-p Crystal oscillator source impedance 2- 4 0 0 Ω Nominal spread = +15% Port leakage current 6-9 10 µAV OUT = 13.2V Lock leakage current 11 10 µAV OUT = VCC Varactor Drive Amp Disable 10 -350 µAV IN = <0V Charge Pump Disable 4 -350 µAV IN = <0V Electrical Characteristics Table† (continued) Characteristics Symbol Pin Value Units Conditions Min. Typ. Max.

9Zarlink Semiconductor Inc. Absolute Maximum Ratings † All voltages are referred to V EE = 0V. Absolute Maximum Ratings Table† Parameter Pin SP5024 Pin SP5024S Value Units Conditions Min Max Supply voltage 14 12 -0.3 -6 V Prescaler inputs 15,16 13,14 2.5 Vp-p Output ports 6-9 6-9 -0.3 -0.3 V V Port in off state Port in on state Total port output current 6-9 6-9 50 mA Prescaler DC offset 15,16 13,14 -0.3 V CC+0.3 V Loop amplifier DC offset 1,18 1,16 -0.3 V CC+0.3 V Crystal oscillator DC offset 2 2 -0.3 V CC+0.3 V Data bus inputs 4,5,10 4,5,10 -0.7 V CC+0.3 V With V CC applied Storage temperature -55 +125 0C Junction temperature +150 0C DP 18 thermal resistance, chip-to-ambient 78 0C/W DP 18 thermal resistance, chip-to-case 24 0C/W MP 16 thermal resistance, chip-to-ambient 111 0C/W MP 16 thermal resistance, chip-to-case 41 0C/W Power consumption at 5V 275 mW All ports off.

www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or 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 t he 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 license, either express or implied, u nder patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers 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, their 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 been 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 and I 2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved. TECHNICAL DOCUMENTATION - NOT FOR RESALE For more information about all Zarlink products visit our Web Site at