HA12217F datasheet(13/53 Pages) RENESAS

13 / 53 page

HA12216F/HA12221F Series

Rev.6.00 Jun 15, 2005 page 13 of 52

The Tolerances of External Components for Dolby NR (Only HA12216F Series)

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

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

DET (L)

HA12216F Series

18k

Ω

±2%

BIAS

C10

0.1

µF

±10%

0.1

µF

±10%

DET (R)

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.

Test condition

Note:

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

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.

• SG output mode

ref

EQOUT

−

HA12216F

NFI

FIN

330k

1000p

12k

AC VM

wait DIN/AUDIO

0.01

680

180

Figure 7 Test Circuit

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