HA12231FP データシートの表示（PDF） - Renesas Electronics

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HA12231FP

Audio Signal Processor for Car Deck (PB 1 Chip)

Renesas Electronics 

HA12231FP

Functional Description

Power Supply Range

HA12231FP is designed to operate on single supply only.

Table 1 Supply Voltage Range

HA12231FP

Product

7.2 V to 12.0 V

Single Supply

Reference Voltage

HA12231FP provides the reference voltage of half the supply voltage that is the signal grounds. As the peculiarity of

this device, 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.

11 VCC

+

−

MS block

14 RIP

20

+

C1

1µ

+

−

1 VREF

to Line Amp.

: Internal reference voltage

Figure 1 The Block Diagram of Reference Supply Voltage

Operating Mode Control

HA12231FP provides fully electronic switching circuits. And each operating mode control are controlled by parallel

data (DC voltage).

When a power supply of this IC is cut off, for a voltage, in addition to a mode control terminal even though as do not

destruct it, in series for resistance.

Table 2 Threshold Voltage (VTH)

Pin No.

8, 9, 10

Lo

−0.2 to 1.0

Hi

3.5 to VCC

Unit

V

Test Condition

Input Pin Measure

V

Table 3 Switching Truth Table

Pin No.

Pin Name

Low

High

8

120/70

120 µ (Normal)

70 µ (Metal or Chrome)

9

Mute

Mute OFF

Mute ON

10

FOR/REV

Forward

Reverse

Notes: 1. Each pins are on pulled down with 100 kΩ internal resistor.

Therefore, it will be low-level when each pins are open.

2. Over shoot level and under shoot level of input signal must be the standardized.

(High: VCC, Low: −0.2 V)

3. Reducing pop noise is so much better for 10 kΩ to 22 kΩ resisitor and 1 µF to 22 µF capacitor shown figure 2.

Rev.2.00 Jun 15, 2005 page 7 of 22

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