HA12207NT Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HA12207NT

Audio Signal Processor for Cassette Deck

Hitachi -> Renesas Electronics 

Functional Description

Power Supply Range

HA12207NT is designed to operate on single supply, shown by table 1.

Table 1 Supply Voltage

Item

Single Supply

Power Supply Range

9.5V to 15.0V

HA12207NT

Reference Voltage

As AC reference (Vref) of this IC has not a current drivability, Vref fluctuates by A/B switching of PB-EQ.

Provided it causes you anxiety, please supply 7 pin with approximate 1/2 VCC voltage.

For example, a suitable circuit is shown by figure 1.

This IC has a capacitor charger for the Vref, indicated to the pin interface circuit figure.

470Ω

VCC

1

22

GND

7

Vref

+

470µF

Lch PB-EQ Reference voltage

Lch REC-EQ Reference voltage

Rch REC-EQ Reference voltage

Rch PB-EQ Reference voltage

Figure 1 Reference Voltage Circuit

Rev.3, Jun. 1999, page 7 of 27

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