11

Multimedia ICs

BA7726AS / BA7726AFS

(1) LINE OUT (pins 1 and 2) signal processing

• Be sure to attach a capacitor for phase correction to

the LINE OUT pins.

4700p

4700p

LINE OUT R

LINE OUT L

Fig. 9

(2) Setting the loop gain

• Set the LPF constant and pin 12 control voltage so

that the loop gain (1st echo wave / 2nd echo wave)

does not exceed 1. Be particularly careful of peak-

ing near the LPF cutoff point.

(3) ALC function and microphone amplifier input

detection function

• Refer to items 7 and 8 in “Circuit description.” When

these functions are not used, be sure to ground pins

27 and 28 (the ALC function) and pins 29 and 30

(microphone amplifier input detection function).

32

1

16

17

0.5

± 0.1

0.3 ± 0.1

28.0

± 0.3

0

° ~ 15°

10.16

1.778

SDIP32

SSOP-A32

BA7726AFS

BA7726AS

0.15

0.3Min.

1

32

0.36

± 0.1

16

17

13.6

± 0.2

0.8