TZA1025T

INTEGRATED CIRCUITS DATA SHEET TZA1025 Data amplifier and laser supply circuit for CD audio and video optical systems (ADALASLC) Product specification File under Integrated Circuits, IC01 1998 Oct 30 Philips Semiconductors Product specification Data amplifier and laser supply circuit for CD audio and video optical systems (ADALASLC) FEATURES Supports a wide range of voltage output mechanisms RF amplifier designed for audio and video applications with 1 × data rate Programmable RF gain for CD-Audio/Video (CD-A/V) and CD-Read/Write (CD-R/W) discs Equalizer for optimal performance Fully Automatic Laser Power Control (ALPC) including stabilization plus a separate laser supply voltage for power efficiency Adjustable current range of ALPC output Automatic N- or P-substrate monitor diode selection Adjustable laser bandwidth and laser switch-on current slope using external capacitor Protection circuit to prevent laser damage due to laser supply voltage dip Optimized interconnection between data amplifier and Philips’ digital signal processor CD10LC (SAA7325) Wide supply voltage range Power-down switch to reduce power consumption during standby Low power consumption. GENERAL DESCRIPTION The TZA1025 is a data amplifier and laser supply circuit for voltage output mechanisms found in a wide range of audio and video CD systems. The device contains an RF amplifier and an automatic laser power control circuit. The preamplifier forms an interface for voltage outpu...