PI5A100 Просмотр технического описания (PDF) - Diodes Incorporated.

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PI5A100

Precision, Wide-Bandwidth Quad SPDT Analog Switch

Diodes Incorporated. 

A product Line of

Diodes Incorporated

PI5A100

Applications

Audio Muting Function

Figure 8 shows the PI5A100 in an audio card muting application. The original problem was one of excessive popping/clicking noise

appearing when connecting disconnecting external loads, and at power on/off. The PI5A100 performs a muting function by grounding

the outputs at power on/off and during the transition time. The 32Ω headset impedance demands a very low and very flat switch-on

resistance to reduce THD and signal loss.

Paralleling two sections of the PI5A100 produces a Ron of 2.5Ω with an unsurpassed ±0.5Ω flatness.

To handle AC signals it was necessary to power the device with ±3V provided by two Zener diodes: Z1 and Z2. The select and Enable

control signals are shifted by using twpo 2.5V Zener diodes Z3,Z4 and pull down resistors connected to -3V.

Stereo Audio

Input

From DAC

J1

Select

Enable

Z3

2.5V

Z4

2.5V

Stereo Audio

Output

10kW

J2

32!

GND -3V

-5V

Vcc

+5V

Z1

Z2

Z1/Z2 - Dual SMT 3.0V Zener

22k!

-3V

Figure 10: The PI5A100 momentarily mutes the stereo outputs by connecting them to ground during transition times.

Part Marking

W Package

Q Package

PI5A

100WE

*YYWWXX

PI5A

100QE

ZYWXX

*: Die Rev

YY: Year

WW: Workweek

1st X: Assembly Site Code

2nd X: Fab Site Code

Bar above fab code means Cu wire

Z: Die Rev

YW: Year & Workweek

1st X: Assembly Code

2nd X: Fab Code

PI5A100

Document Number DS40515 Rev 1-2

10

www.diodes.com

December 2017

Diodes Incorporated

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