STMicroelectronics AN1743 Application Note

an explanation of the correct use of the STG3699 Analog Switch in mobile telecom applications

Brand: STMicroelectronics
Category: Other Electronics
Document type: Application Note
Language: English
Pages: 4
File format: PDF
File size: 50 KB
Published: 06 August, 2012
Updated: 30 September, 2023
Model: STG3699
MD5 checksum: F8BCE36DD5444AA2170D0E7D36850E95
PDF: STMicroelectronics AN1743 Application Note PDF

About this manual

This document describes the correct usage of the STG3699 Analog Switch in mobile telecom applications, specifically focusing on E.S.D. protection circuitry and potential issues with audio amplifier coupling. It details the protection diodes within the switch and the risks associated with incorrect input signal levels relative to the power supply.

What's inside

E.S.D. Protection Circuitry
Absolute Maximum Ratings
Operating Conditions
Audio System Amplifier Schematic
Power Supply Stability
Differential Mode Operation
Cross Talk and Noise

Specifications

Supply Voltage (Vcc)	-0.5 to +4.6 V
DC Input Voltage	-0.5 to Vcc +0.5 V
DC Control Input Voltage (VIC)	-0.5 to +4.6 V
DC Output Voltage (VO)	-0.5 to Vcc +0.5 V
Operating Supply Voltage	1.65 to 3.6 V

Frequently asked questions

What is the recommended supply voltage range for the STG3699?

The recommended operating supply voltage range is 1.65 to 3.6 V.

How much capacitance is needed for power supply stability?

A capacitance of 10uF should be applied to the STG Analog Switch between the Vcc pin and GND.

What happens if the input signal level is higher than the power supply?

The protection diode versus Vcc becomes forward biased, causing current to flow from the input to Vcc, which can damage the device.

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