HA12209F Datasheet, PDF (8/49 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

HA12209F
Functional Description
Power Supply Range
HA12209F is designed to operate on single supply.
Table 1 Spply Voltage
Item
Power Supply Range
Single Supply
10V to 15V
Note: The lower limit of supply voltage depends on the line output reference level.
The minimum value of the overload margin is specified as 12dB by Dolby Laboratories.
Reference Voltage
For this IC, the reference voltage (V_CC/2) occurrence device is built-in as AC grand. A capacitor for a
ripple filter is greatly small characteristic with 1/100 compared with conventional device.
And, the reference voltage are provided for the left channel and the right channel separately.
The block diagram is shown as figure 1.
22 23 ^VCC
+
–
V_CC
+
–
+
–
50 51 49
GND
+PIR
1µ
L channel Reference voltage
Music sensor Reference voltage
R channel Reference voltage
Unit C : F
Figure 1 Reference Voltage
Rev.2, Jun. 1999, page 8 of 49