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.

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.