WM8994 datasheet(22/359 Pages) WOLFSON

22 / 359 page

WM8994

Production Data

PD, April 2012, Rev 4.4

Test Conditions

AVDD1=3.0V (powered from LDO1), DCVDD=1.0V (powered from LDO2), AVDD2=DBVDD=LDO2VDD=CPVDD=1.8V,

LDO1VDD=SPKVDD1=SPKVDD2=5V, DGND=AGND=CPGND=SPKGND1=SPKGND2=HP2GND=0V,

TA = +25

oC, 1kHz sinusoidal signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

E13

Speaker Output Power (Load = 8

 + 22H BTL, Stereo Mode)

Output Power

SPKVDD1=

SPKVDD2=5.0V

THD+N ≤ 1%

Class AB

Class D

SPKVDD1=

SPKVDD2=4.2V

THD+N ≤ 1%

Class AB

0.95

Class D

0.95

SPKVDD1=

SPKVDD2=3.7V

THD+N ≤ 1%

Class AB

0.75

Class D

0.75

Note that the maximum recommended speaker output power is 1W per channel into 8Ω.

Output levels that exceed this limit are not guaranteed and may cause damage to the WM8994.

Speaker Output Power (Load = 4

 + 22H BTL, Stereo Mode)

Output Power

SPKVDD1=

SPKVDD2=5.0V

THD+N ≤ 1%

Class D

(see note below)

2.3

SPKVDD1=

SPKVDD2=4.2V

THD+N ≤ 1%

Class D

1.6

SPKVDD1=

SPKVDD2=3.7V

THD+N ≤ 1%

Class D

1.2

Speaker Output Power (Load = 4

 + 22H BTL, Mono Mode)

Output Power

SPKVDD1=

SPKVDD2=5.0V

THD+N ≤ 1%

Class AB

(see note below)

2.7

Class D

(see note below)

2.7

Note that the maximum recommended speaker output power is 2W per channel into 4Ω.

Output levels that exceed this limit are not guaranteed and may cause damage to the WM8994.

WM8994 Datasheet(PDF) 22 Page - Wolfson Microelectronics plc

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