HA12223F Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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производитель

HA12223F

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

Hitachi -> Renesas Electronics 

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 VCC

35 36

33 RIP

+

C15

1µ

+

−

MS block

+

−

38 VREF

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

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