XE3005 ETC, XE3005 Datasheet - Page 5

• Manufacturer Part Number: XE3005
• Description: (XE3005 / XE3006) Low-Power Audio CODEC
• Manufacturer: ETC

2.1.2
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.
5
MIC Input
Figure 3: typical microphone interface (1.1 V / 50 uA bias through VREG11)
Figure 4: typical microphone interface (1.6 V / 1 mA bias through VREG16)
*
depends on microphone type
1k
1µF
*
1µF
0.1µF
0.1µF
1µF
Vcc
1µF
Vcc
820k
820k
GND
GND
10
11
12
4
5
6
7
8
9
10
11
12
4
5
6
7
8
9
VREG16
VREG11
VDD
NRESET
VSSA
VREF
VSSD
AIN
VSSA
VREG16
VDD
NRESET
VSSA
VREF
VSSA
VSSD
VREG11
AIN
200 pF (gain is 20)
50 pF (gain is 5)
200 pF (gain is 20)
50 pF (gain is 5)
1k
Data Sheet
XE3005/XE3006
D0212-116