WM8944BECSSLASHR datasheet(59/165 Pages) CIRRUS

59 / 165 page

WM8944B

Rev 4.3

ANALOGUE OUTPUTS

The Line output and Speaker output pins are highly configurable and may be used in many different

ways. The output mixers can be configured to generate single-ended or differential outputs. The Class

AB Speaker output driver can deliver up to 400mW into an 8

 speaker in BTL mode.

LINE OUTPUT

The line output LINEOUT is the external connection to the MIXOUT mixer. This is a single-ended

output driver.

Note that single-ended line output can also be provided on SPKOUTP and SPKOUTN.

SPEAKER OUTPUTS

The speaker outputs SPKOUTP and SPKOUTN are the external connections to the Speaker Output

mixers. These outputs are intended for a mono speaker or headphone in BTL configuration or for a

twin mono line load.

In a typical application, a BTL output from the DAC may be generated at the speaker outputs by

routing the Speaker PGA to the SPKOUTP and SPKOUTN pins.

The analogue inputs AUX and IN1 may also be routed to the SPKOUTP and SPKOUTN outputs by

enabling the respective signal path in each of the speaker output mixers.

EXTERNAL COMPONENTS FOR LINE OUTPUT

In single-ended output configurations, DC blocking capacitors are required at the output pins

(LINEOUT, SPKOUTP and SPKOUTN

). See “Applications Information” for details of these

components.

WM8944BECS/R Datasheet(PDF) 59 Page - Cirrus Logic