STG3699_ 데이터 시트보기 (PDF) - STMicroelectronics

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STG3699_

AUDIO AMPLIFIER SYSTEM USING THE ANALOG SWITCH STG3699

STMicroelectronics 

AN1743 - APPLICATION NOTE

The following tables show the absolute maximum rating characteristics for the STG3699 device and the

correct signal level applicable to these devices to avoid possible problems.

Table 1: Absolute Maximum Rating

Symbol

Vcc

VI

VIC

VO

Parameter

Supply Voltage

DC Input Voltage

DC Control Input Voltage

DC Output Voltage

Value

-0.5 to +4.6

-0.5 to Vcc +0.5

-0.5 to +4.6

-0.5 to Vcc +0.5

Units

V

V

V

V

Table 2: Right Level Applicable in Operating Conditions

Symbol

Vcc

VI

VIC

VO

Parameter

Supply Voltage

DC Input Voltage

DC Control Input Voltage

DC Output Voltage

Value

1.65 to 3.6

≤Vcc

≤Vcc

0 to Vcc

Units

V

V

V

V

3. APPLICATION

Usually, in telecom mobile applications, an Audio Amplifier drives the Analog Switch. So the designer

must consider different parameters to realize a PCB without problems.

A channel-to-channel Cross Talk or a drift of a few parameters are typical problems of bad coupling

between the Audio Amplifier and the Analog Switch.

The following schematic shows a typical speaker amplifier system for telecom mobile phones.

Figure 2: Audio System Amplifier Schematic

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