HA12177 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HA12177

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

Hitachi -> Renesas Electronics 

Functional Description

HA12173 Series

Power Supply Range

HA12173 series are provided with four line output level, which will permit on optimum overload margin

for power supply conditions. And this series are designed to operate on either single supply or split supply.

Table 1 Supply Voltage

Item

Single supply

Split supply

GND level

V level

EE

HA12173

HA12174

7.0 V to 16.0 V 8.0 V to 16.0 V

±5.0 V to 8.0 V ±5.0 V to 8.0 V

±3.5 V to ±8.0 V ±4.0 V to 8.0 V

HA12175

9.5 V to 16.0 V

±5.0 V to 8.0 V

±4.8 V to 8.0 V

HA12177

12.0 V to 16.0 V

±6.0 V to 8.0 V

±6.0 V to 8.0 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 case of using digital GND terminal referring to GND level, operating voltage range varies

depending on the condition at power on. On using the HA12173/174/175, use within the following

ranges to avoid latch-ups.

When power on in NR-OFF mode: ±5.0 V to ±8.0 V

When power on in NR-ON mode: ±5.7 V to ±8.0 V

C. 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.

Single power supply : Short-circuit the D-GND and GND directory on the board mounting this IC.

Split power supply : Avoid reverse conditions of D-GND and VCC or VEE voltage, including

transient-time of power ON/OFF.

Reference Voltage

For the single supply operation 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.

Rev.1, Nov. 1992, page 11 of 66

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