FAN3850AUC19X datasheet(9/11 Pages) FAIRCHILD

Part #	FAN3850AUC19X

Description	Microphone Pre-Amplifier with Digital Output

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Manufacturer	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

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FAN3850A • Rev. 3.0.6

9

Applications Information (Continued)

Diaphragm

Backplate

Airgap

Electret

FAN3850A

INPUT

CLOCK

DATA

SELECT

VDD

GND

Figure 10. MIC Element Drawing

A 0.1μF decoupling capacitor is required for VDD. It can

be located inside the microphone or on the PCB very

close to the VDD pin.

Due to high input impedance, care should be taken to

remove all flux used during the reflow soldering process.

A 100

resistance is recommended on the clock output

of the device driving the FAN3850A to minimize ringing

and improve signal integrity.

For optimal PSR, route a trace to the VDD pin. Do not

place a VDD plane under the device.

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