HA12220F Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12220F

CD-ROM Drive Head Amplifier IC

Hitachi -> Renesas Electronics 

HA12220F

CD-ROM Drive Head Amplifier IC

ADE-207-230 (Z)

Target Specification

1st. Edition

April 1997

Functions

• RF amplifier (Built-in equalizer changing circuit)

• Focus error amplifier (fc = 60kHz Typ)

• Tracking error amplifier (Built-in cut-off frequency changing circuit fc = 30kHz, 60kHz, 100kHz,

200kHz Typ)

• FOK detection circuit (Built-in Vth changing circuit)

• Mirror detection circuit

• Defect detection circuit

• APC amplifier

• RFAGC amplifier

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 to set the stand-by mode

• FP-28TB package

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