HA12223F datasheet(8/53 Pages) HITACHI

Part #	HA12223F

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

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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HA12216F/HA12221F Series

Rev.6, Dec. 2000, page 8 of 53

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.

−

+

−

+

−

+

−

+

38

16

Note: HA12221F series does not include Dolby NR circuit.

VCC

RIP

C15

1

µ

33

+

35 36

EQ block (to Line Amp.

in case of HA12221F series)

VREF

MS block

L channel

Dolby NR circuit

: Internal reference voltage

R channel

Dolby NR circuit

Figure 1 The Block Diagram of Reference Supply Voltage

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