HA12193F データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12193F

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

Hitachi -> Renesas Electronics 

HA12192F/HA12197F/HA12212F Series

Music Sensor Time Constant

(1) Sensing no signal to signal (Attack) is determined by C6.

0.01µF to 1µF capacitor C6 can be applicable.

Sensing no signal to signal = C6 × 45000 (sec)

(2) Sensing signal to no signal (Recovery) is determined by C6 and R11, however preceding (1), 100kΩ to

1MΩ R11 can be applicable.

Sensing signal to no signal = C6 × R11 (sec)

Music Sensor Output (MSOUT)

As for the internal circuit of music sensor block, music sensor output pin is connected to the collector of

NPN type directly, therefore, output level will be “high” when sensing no signal. And output level will be

“low” when sensing signal.

Connection with microcomputer, design IL at 1mA Typ.

I L = DVCC

–

MSOUTLo *

RL

*MSOUTLo: Sensing signal (about 1V)

Note: Supply voltage of MSOUT pin must be less than VCC voltage.

The Tolerances of External Components for Dolby NR-Block (Only HA12192F Series)

For adequate Dolby NR tracking response, take external components shown below.

C10

0.1µF

±10%

16

DET(L)

HA12192F series

BIAS

DET(R)

6

R8

18kΩ

±2%

5

C4

0.1µF

±10%

Figure 6 Tolerance of External Components

Rev.5, Jun. 1999, page 15 of 89

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