ha12162fp HITACHI, ha12162fp Datasheet - Page 57

• Manufacturer Part Number: ha12162fp
• Description: Dolby C-type Noise Reduction System
• Manufacturer: HITACHI

Functional Description
Power Supply Range
HA12141 series are designed to operate on either single supply or split supply. The operating range of the
supply voltage is shown in table 1.
Table 1 Supply Voltage
Type No.
HA12141NT
HA1211161FP
HA12142NT
HA12162FP
HA12170NT
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.
HA12141 series are provided with 3 line output level, which will permit an optimum overload margin for
power supply conditions.
Reference Voltage
For the single supply operation these devices generate 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 conventional devices.
The reference voltage supplies are provided for the left channel and the right channel. The block-diagram
is shown as figure 1.
HA12141NT, HA12142NT, HA12170NT, HA12161FP, HA12162FP
1 F
Figure 1 The Block-Diagram of Reference Voltage Supply
+
4
Single supply
7.5 to 16 volts
9.5 to 16 volts
12 to 16 volts
V
CC
+
—
—
+
23
8
Split supply
±3.8 to ±8 volts
±4.8 to ±8 volts
±6 to ±8 volts
Rev.3, Jun. 1999, page 57 of 63
Lch
Rch
Reference
Reference