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

The Tolerances of External Components for Dolby NR (Only HA12228F)

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

Also, leak is small capacity, and please employ a good quality object.

BIAS

5

R10

18kΩ

±2%

C14

0.1µF

±10%

23

DET(R)

HA12228F

DET(L)

8

C7

0.1µF

±10%

Figure 6 Tolerance of External Components

Countermeasure of a Cellular Phone Noise

This IC have reinforced a cellular phone noise countermeasure, to show it hereinafter.

However, it is presumed that this effect change it greatly, by a mount set.

Please sufficiently examine an arrangement of positions, shield method, wiring pattern, in order to oftain a maximum

effect.

A high terminal of a noise sensitivity of this IC is FIN, RIN, NFI and RIP.

ref

HA12228F

1000 p

SG

FIN

180

NFI

+

−

270 k

13 k

M-OUT EQOUT

0.01µ

AC VM

wait DIN/AUDIO

Note: Test condition

• Use for SG by cellular radio for an evaluation use.

• SG output mode

PDC system, burst

UP Tch (Transmission mode on the side of a movement machine)

• To evaluate a capacitor of 1000 pF as connecting with it directly.

• About EQOUT output, what you measure through DIN/AUDIO filter.

Figure 7 Test Circuit

Rev.2.00 Jun 15, 2005 page 13 of 48

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