HA12229F データシートの表示（PDF） - Hitachi -> Renesas Electronics

部品番号

コンポーネント説明

メーカー

HA12229F

Audio Signal Processor for Car Deck (Decode only Dolby B-type NR* with PB Amp.)

Hitachi -> Renesas Electronics 

HA12228F/HA12229F

Functional Description

Power Supply Range

HA12228F/HA12229F 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

HA12228F

6.5 V to 12.0 V

HA12229F

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.

+

Rch

−

Dolby NR circuit

VCC

15

+

Lch

−

Dolby NR circuit

26

36

+

GND

3 Vref4

28 Vref3

38 Vref2

+

−

32 Vref1

Lch equalizer

Rch equalizer

+

−

MS block

: Internal reference voltage

Figure 1a The HA12228F Block Diagram of Reference Supply Voltage

Rev.2, Dec. 2000, page 9 of 51

Share Link: