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AS3418

Functional Description

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 23

6.4.1

Parameter

VBAT =1.8V, TA= 25ºC, unless otherwise specified.

Figure 22:

Microphone Supply Parameter

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

RL_HP

Load Impedance

Stereo Operation Mode

Ω

Mono Operation Mode

Ω

CL_HP

Load Capacitance

Per channel

100

PHP

Nominal Output

Power Stereo Mode

VBAT= 1.8V; 32

Ω load;

THD<0.1%

VBAT= 1.4V; 32

Ω load;

THD<0.1%

VBAT= 1.8V; 16

Ω load;

THD<0.1%

VBAT= 1.4V; 16

Ω load;

THD<0.1%

PBRIDGE

Nominal Output

Power Differential

Mode

VBAT= 1.8V; 32

Ω load;

THD<0.1%

130

VBAT= 1.4V; 32

Ω load;

THD<0.1%

IHPH

Supply Current

VBAT = 1.8V; no input signal,

normal mode

2.9

VBAT = 1.8V; no input signal,

ECO mode

2.4

VBAT = 1.4V; no input signal,

normal mode

2.8

VBAT = 1.4V; no signal, ECO

mode

2.3

PSRRHP

Power Supply

Rejection Ratio

1kHz

100

SNR

Signal to Noise

Ratio

High Quality Mode, Line Input -

> HPH stereo in phase test

signal; 32Ω load; VBAT = 1.8V;

A-weighted

117

High Quality Mode, Line Input -

> HPH stereo out of phase test

signal; 32

Ω load; VBAT = 1.8V;

A-weighted

117.5

ECO Mode, Line Input -> HPH

stereo in phase test signal;

32Ω load; VBAT = 1.8V; A-

weighted

114

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