TZA1025 - NXP

TZA1025 Data amplifier and laser supply circuit for CD audio and video optical systems ADALASLC

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 output CD mechanisms to the Philips’ digital signal processor CD10LC (SAA7325). ORDERING I.

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 da.