CXA1898Q 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA1898Q

Recording/Playback Equalizer Amplifier

Sony Semiconductor 

CXA1898Q

1. System control mode

Playback and recording equalizer

(1) Playback equalizer (120µs/70µs)

A-EQ (Pin 10)

L

H

DECK-AB

(serial data

D10 (Pin 25))

L

120µs

(A DECK)

70µs

(A DECK)

H According to B EQ control

B-EQ (Pin 11)

L

M/H

According to A EQ control

120µs

(B DECK)

70µs

(B DECK)

(2) Recording equalizer (Normal, CrO2, Metal)

B-EQ (Pin 11)

L

M

REC MODE Normal (Type I) CrO2 (Type II)

H

Metal (Type IV)

(3) Recording mute (Pin 12)

Rec Mute

Mute OFF

Control voltage GND ≤ VCL ≤ 0.5V

–7dB attenuation

2.0V

Mute ON

3.5V ≤ VCH ≤ VCC

Muting is achieved by varying the recording equalizer amplifier gain just like an electronic volume, according to

the DC voltage applied to the REC MUTE pin.

(4) FP CAL (Pin 4)

The standard resistor setting is 27kΩ, but when resistance value is larger, fo (Hz) is low, and when resistance

value is smaller, fo (Hz) is high.

(5) Gp Cal (Pin 5)

The standard resistor setting is 27kΩ, but when resistance value is larger, gain is larger, and when resistance

value is smaller, gain is smaller.

– 15 –

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