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TDA1301 Scheda tecnica(PDF) 1 Page - NXP Semiconductors |
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TDA1301 Scheda tecnica(HTML) 1 Page - NXP Semiconductors |
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1 / 14 page  March 1994 2 Philips Semiconductors Product specification Digital servo processor (DSIC2) TDA1301T FEATURES The DSIC2 realizes the following servo functions: • Diode signal preprocessing • Focus servo loop • Radial servo loop • Sledge motor servo loop • Three-line serial interface via the microcontroller The other features include: • Full digital signal processing • Low power consumption, down to 30 mW • Low voltage supply 3 to 5.5 V • Integrated analog-to-digital converters and digital servo loop filters • Double speed possible • Easy application – Single supply voltage – Small number of external components; only 6 decoupling capacitors – Flexible system oscillator circuitry – Usable for single/double Foucault and astigmatic focus – Full automatic radial error signal initialization offset control and level initialization for track position indicator – No external adjustments required; no component ageing – Wide range of adjustable servo characteristics – Simple 3-line serial command interface – 28-pin SO package – Great flexibility towards different CD mechanisms – Full and transparent application information • High robustness/shock insensitivity – Sophisticated track-loss (TL) detection mechanism – Fast focus restart procedure – Extended radial error signal – Adjustable radial shock detector – Defect drop-out detector • Fully automatic jump procedure for radial servo • Automatic focus start-up procedure and built-in FOK (Focus OK) • Fast radial jump or access procedure • Self-operational servo-control without continuous communication via the microcontroller • Direct communication to photodiode optics; no external preprocessing. GENERAL DESCRIPTION The TDA1301T is a fully digital servo processor which has been designed to provide all servo functions, except the spindle motor control, in two-stage three-spot compact disc systems. The device offers a high degree of integration, combined with the low additional cost of external components. The servo characteristics have a wide range of adjustment via a three-line serial interface. This offers an enormous flexibility with respect to applications for different CD mechanisms. The circuit is optimized for low-power low-voltage applications. QUICK REFERENCE DATA Note 1. fsys = 4.2336 MHz; VRL = 0 V; VRH = 2.5 V (externally applied). SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VDDD digital supply voltage 3.0 − 5.5 V VDDA analog supply voltage 3.0 − 5.5 V IDDD digital supply current − 5 − mA IDDA analog supply current − 5 − mA IDDD(q) digital quiescent supply current − − 10 µA Ii(cd) central diode input currents (D1 to D4) note 1 − − 15.8 µA Ii(sd) satellite diode input currents (R1 and R2) note 1 − − 7.9 µA Ptot total power dissipation − 50 − mW Tamb operating ambient temperature −40 − +85 °C |
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