AS3412 datasheet(19/85 Pages) AMSOSRAM

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[v1-00] 2016-Apr-06

AS3412 − Detailed Description

Bypass Switch Operation: When using the TRSDA/BPL and

TRSCL/BPR pins you must not switch off the microphone

supply!

Parameter

VBAT=1.8V, TA= 25ºC, CMICS = 22μF, CMICSF = 47μF and

RMICSF = 220Ω unless otherwise specified.

Figure 19:

Microphone Supply Parameter

Microphone Supply Parameter: This table shows the detailed electrical characteristics of the microphone

supply.

Figure 20:

Microphone Supply Load Characteristic

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VMICS

Microphone Supply

Voltage

VBAT = 1.8V, no load

3.4

VBAT = 1.65V, no load

3.2

IMICS

Block Current

Consumption

VBAT = 1.8V; no load

0.36

0.5

0.9

VBAT = 1.65V; no load

0.36

0.4

0.85

VNoise-A

Microphone Supply Noise

A-Weighted, 500μA load

1.4

μV

A-Weighted, 550μA load, only

CMICS = 22uF assembled

μV

A-Weighted, 500μA load, only

CMICS = 10uF assembled

μV

Microphone Supply Load

Characteristic: This diagram shows

output voltage of the microphone

supply vs. output load on the

microphone supply.

123

load [mA]

VBAT=1.65

VBAT=1.8V

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