WM8994ECSSLASHR datasheet(33/363 Pages) CIRRUS

33 / 363 page

WM8994

Rev 4.6

SPEAKER DRIVER PERFORMANCE

Typical speaker driver THD+N performance is shown below for Class D and Class AB modes. Curves are shown for typical SPKVDD

supply voltage, gain and load conditions.

0.01

0.1

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

Output Power (W)

THD+N vs. Output Power

Class D, Mono (SPKMODE=1), 8

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

0.01

0.1

0.5

1.5

2.5

Output Power (W)

THD+N vs. Output Power

Class D, Mono (SPKMODE=1), 4

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

0.01

0.1

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

Output Power (W)

THD+N vs. Output Power

Class AB, Mono (SPKMODE=1), 8

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

0.01

0.1

0.5

1.5

2.5

Output Power (W)

THD+N vs. Output Power

Class AB, Mono (SPKMODE=1), 4

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

0.01

0.1

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

Output Power (W)

THD+N vs. Output Power

Class D, Stereo (SPKMODE=0), 8

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

0.01

0.1

0.5

1.5

2.5

Output Power (W)

THD+N vs. Output Power

Class D, Stereo (SPKMODE=0), Load = 4

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

0.01

0.1

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

Output Power (W)

THD+N vs. Output Power

Class AB, Stereo (SPKMODE=0), 8

Ω + 10µH

SPKVDD = 3.3V

SPKVDD = 3.7V

SPKVDD = 5.0V

SPKVDD = 4.5V

SPKVDD = 4.2V

WM8994ECS/R Datenblatt(PDF) 33 Page - Cirrus Logic

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