HA12160 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12160

Audio Signal Processor for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)

Hitachi -> Renesas Electronics 

HA12163 Series

Application Note

1. Power Supply Range

HA12163 series are provided with four line output level, which will permit on optimum overload

margin for power supply conditions. And this series are designd to operate on single supply only.

In case of split supply use, please consult with sales engineer.

Table 1 Supply Voltage

Single supply

HA12163

6.5 V to 16.0 V

HA12164

7.2 V to 16.0 V

HA12165

8.5 V to 16.0 V

HA12160

8.2 V to 16.0 V

A. 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.

B. In the reverse-voltage conditions such as ‘D-GND is higher than VCC’ or ‘D-GND is lower than

GND’, excessive current flows into the D-GND to destory this IC. To prevent such destruction, pay

attention to the followings on using.

Short-circuit the D-GND and GND directory on the board mounting this IC.

2. 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 Reference voltage are provided for the left channel and the right channel

separately. The block diagram is shown as figure 1.

22 VCC

47 VREF(L)

+

–

L channel

reference

+

30 MS VREF

–

Music sensor

reference

+

R channel

–

reference

GND 49 50

40 RIP

+

C22

1µ

52 VREF(R)

Figure 1 The Block Diagram of Reference Voltage Supply

Rev.4, Jun. 1999, page 15 of 66

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