XE3005 查看數據表（PDF） - Unspecified

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比赛名单

XE3005

Low-Power Audio CODEC

Unspecified 

Data Sheet

XE3005/XE3006

2.1.2 MIC Input

The programmable pre-amplifier and the microphone bias sources VREG11 or VREG16 are optimized to operate

with electret microphones. VREG11 provides a 1.1 V reference voltage. The VREG11 can deliver up to 50 µA.

VREG11 is enabled through control register E. VREG16 is a regulated voltage of typically 1.6V and can deliver

up to 1 mA.VREG16 is always enabled.

Vcc

0.1µF

1µF 1µF

820kΩ

4 VDD

5 NRESET

6 VSSA

7 VREG16

8 VREF

9 VSSA

10 VSSD

11 VREG11

1kΩ

AIN

12

50 pF (gain is 5)

200 pF (gain is 20)

GND

Figure 3: typical microphone interface (1.1 V / 50 uA bias through VREG11)

Vcc

1kΩ*

0.1µF

1µF 1µF

820kΩ

4 VDD

5 NRESET

6 VSSA

7 VREG16

8 VREF

9 VSSA

10 VSSD

11 VREG11

12 AIN

50 pF (gain is 5)

200 pF (gain is 20)

*

depends on microphone type

GND

Figure 4: typical microphone interface (1.6 V / 1 mA bias through VREG16)

5

D0212-116

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