AS3418-EWLM datasheet(17/78 Pages) AMSOSRAM

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AS3418

Functional Description

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 16

Figure 12 :

Simulated Microphone Frequency Response

In applications with PCB space limitations it is also possible to remove the capacitors CAC and connect

MICACL and MICACR pins directly to AGND. In this configuration AC coupling of the QMICR and

QMICL signals is recommended.

6.2.2

Parameter

VBAT=1.8V, TA= 25ºC , CAC=10µF, CMIC=4.7µF and RMICIN

=2.2kΩ unless otherwise specified.

Figure 13:

Microphone Parameter

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VMICIN_0

Typical maximum

Input Signal Level

Preamplifier gain=0dB, THD <

0.1%

1050

mVRMS

VMICIN_0

Preamplifier gain=20dB, THD <

0.1%

110

mVRMS

SNR

Signal to Noise

Ratio

0dB gain, High quality mode,

AGC disabled

119

10dB gain, High quality mode,

AGC disabled

109

20dB gain, High quality mode,

AGC disabled

106

0dB gain, ECO mode, AGC

disabled

117

10dB gain, ECO mode, AGC

disabled

108

-5

100

10k

f [Hz]

0dB

6dB

12dB

18dB

24dB

30dB

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