TDA1301T

Philips Semiconductors Product specification Digital servo processor (DSIC2) 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 QUICK REFERENCE DATA SYMBOL VDDD VDDA IDDD IDDA IDDD(q) Ii(cd) Ii(sd) Ptot Tamb Note 1. fsys = 4.2336 MHz; VRL = 0 V; VRH = 2.5 V (externally applied). March 1994 2 PARAMETER digital supply voltage analog supply voltage digital supply current analog supply current digital quiescent supply current central diode input currents (D1 to D4) satellite diode input currents (R1 and R2) total power dissipation operating ambient temperature note 1 note 1 CONDITIONS MIN. 3.0 3.0 − − − − − − −40 − − 5 5 − − − 50 − TYP....