HA12228F データシートの表示（PDF） - Renesas Electronics

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HA12228F

Audio Signal Processor for Car Deck (Decode only Dolby B-type NR* with PB Amp.)

Renesas Electronics 

HA12228F/HA12229F

Input Block Diagram and Level Diagram

M-OUT

C1

0.01µF

NFI

Vref1

EQOUT

270kΩ 13kΩ

18kΩ

−+

180Ω

R1

5.1kΩ

R2

5.1kΩ

Vref3

C2

0.1µF

TAI

30mVrms

(−28.2dBs)

+

−

Dolby B-NR

circuit *

PBOUT

300mVrms

(−8.2dBs)

RIN

0.55mVrms

FIN

(−63dBs)

The each level shown above is typical value when offering PBOUT level

to PBOUT pin. (EQ Amp. GV = 40.8dB at f = 1kHz)

Note: HA12229F is not built-in Dolby B-NR.

Figure 3 Input Block Diagram

Adjustment of Playback Dolby Level

After replace R5 and R6 with a half-fix volume of 10 kΩ, adjust playback Dolby level.

Rev.2.00 Jun 15, 2005 page 10 of 48

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