AS3412 datasheet(21/84 Pages) AMSCO

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ams Datasheet

Page 21

[v1-00] 2016-Apr-06

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AS3412 − Detailed Description

Parameter

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

Figure 23:

Headphone Amplifier Parameter

Symbol

Parameter

Condition

Min

Typ

Max

Unit

RL_HP

Load Impedance

Stereo mode

Mono

CL_HP

Load Capacitance

Stereo mode

100

PHP

Nominal Output

Power Stereo Mode

Vbat = 1.8V; 32Ω load; THD<0.1%

Vbat = 1.65V; 32Ω load; THD<0.1%

Vbat = 1.8V; 16Ω load; THD<0.1%

Vbat = 1.65V; 16Ω load; THD<0.1%

PHP_BRIDGE

Nominal Output

Power Differential

Mode

Vbat = 1.8V; 32Ω load

Vbat = 1.65V; 32Ω load

IHPH

Supply current

VBAT = 1.8V; no signal, normal mode

1.5

2.4

3.1

VBAT = 1.8V; no signal, ECO mode

1.18

2.9

PSRRHP

Power Supply

Rejection Ratio

1kHz

100

SNR

Signal to Noise Ration

High Quality Mode, Line Input ->

HPH stereo in phase test signal;

32Ω load; VBAT = 1.8V;

111.5

High Quality Mode, Line Input ->

HPH stereo out of phase test signal;

32Ω load; VBAT = 1.8V;

112.5

ECO Mode, Line Input -> HPH stereo

in phase test signal;

32Ω load; VBAT = 1.8V;

109.5

ECO Mode, Line Input -> HPH stereo

out of phase test signal;

32Ω load; VBAT = 1.8V;

110.5

Channel

Separation

32Ω load

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