HA12220F - Hitachi Semiconductor

HA12220F CD-ROM Drive Head Amplifier

and Equivalent Circuit Pin No. 1 Pin Name RF2 28 12k 120k 160k 12k 120k 160k 12k 120k 160k 12k 120k 160k Equivalent Circuit 4k Function RF FE FSA amplifier input2 5p 600k 1 10p 160k 160k 2 3 10p 2 3 28 4 RF3 RF4 RF1 TR1 4k 1.2p 80k 40k 32k 11.4k RF FE FSA amplifier input3 RF FE FSA amplifier input4 RF FE FSA amplifier input1 TR1 amplifier input .

Features

• Built-in variable resistors (+14 to
  –16% 2% steps) for adjusting tracking error EF balance
• Built-in variable resistors (
  –8 to +8dB 4dB steps) for rough adjusting tracking gain
• Built-in variable resistors (
  –8 to +8dB 4dB steps) for rough adjusting focus gain
• Built-in focus offset insertion circuit (
  –0.7 to +0.7V in 0.1V steps)
• RF amplifier frequency characteristics 30MHz (
  –3dB) in case of peaking off
• High-speed access support (The mirror circuit internal time constant can be switched between normal, 4× and 8× modes.)
• Support for CD-RW playback
• Few external components
• Available.