HA12216F Datasheet, PDF (8/53 Pages) Hitachi Semiconductor – Audio Signal Processor for Car Deck(Decode only Dolby B type NR with PB Amp.)

HA12216F/HA12221F Series
Functional Description
Power Supply Range
HA12216F/HA12221F series are provided with three line output level, which will permit on optimum
overload margin for power supply conditions. And these are designed to operate on single supply only.
Table 1 Supply Voltage Range
Product
Single Supply
HA12216F/HA12221F
6.5 V to 12.0 V
HA12217F/HA12222F
6.8 V to 12.0 V
HA12218F/HA12223F
7.2 V to 12.0 V
Note: The lower limit of supply voltage depends on the line output reference level.
The minimum value of the overload margin is specified as 12 dB by Dolby Laboratories.
Reference Voltage
These devices provide the reference voltage of half the supply voltage that is the signal grounds. As the
peculiarity of these devices, the capacitor for the ripple filter is very small about 1/100 compared with their
usual value. The block diagram is shown as figure 1.
16 V_CC
35 36
33 RIP
+
C15
1µ
+
−
MS block
+
−
38 V_REF
EQ block (to Line Amp.
in case of HA12221F series)
+
−
L channel
Dolby NR circuit
+
−
R channel
Dolby NR circuit
: Internal reference voltage
Note: HA12221F series does not include Dolby NR circuit.
Figure 1 The Block Diagram of Reference Supply Voltage
Rev.6, Dec. 2000, page 8 of 53