HA12215F Datasheet, PDF (16/69 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

HA12215F
R1
RIN
ROUT
15k
25.5mV 21.4dB 300mV
Input
56
8
Output
C2
0.1µ _ALC
C4
55
R2
ALC
9 _{ALCIN R12}
2.2k
13 _ALCDET
V_CC
C12
Figure 12 ALC Block Diagram
ALC Operation Level Necessary
ALC operation level is variable to pin 12 bias (ALC-CAL: 0 to 5 V), and its range is ±4.0 dB.
Unnecessary, pin 12 is unforced.
ALC-CAL = 5V
ALC-CAL = 0V
RIN
Figure 13 ALC-CAL Characteristics
Rev.5, Oct. 1999, page 16 of 69