Datasheet

Maxim Integrated │ 135
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Figure 35. Class D Speaker Output Functional Diagram
Analog Class D Speaker Output
The device features an integrated stereo differential
speaker amplifier. The analog stereo speaker output has
three series sections comprising a flexible input mixer, a
programmable gain amplifier, and a differential Class D
output driver (Figure 35). The speaker output is capable
of driving both 4Ω and 8Ω loads, utilizes a highly efficient
Class D architecture, and meets EMI emission standards
while driving a filterless speaker load.
DACR
DACL
MIC 1
MIC 2
LINE A
LINE B
DACR
DACL
MIC 1
MIC 2
LINE A
LINE B
ANALOG
INPUT
DRIVERS
DACLEN DACRENDACHP
PERFMODE
DAC
LEFT
DAC
RIGHT
FLEXSOUND
TECHNOLOGY
DSP
RECEIVER/LINE OUT/
HEADPHONES
SPK
RIGHT
MIXER
SPK
LEFT
MIXER
-12dB TO 0dB
SPKSLAVE
MIXSPL[5:0]
MIXSPLG[1:0]
SPVOLR[4:0]
SPLM
SPREN
SPVOLL[4:0]
SPLM
SPLEN
-48dB TO 14dB
6dB
SPEAKER
RIGHT PGA
-12dB TO 0dB
MIXSPL[5:0]
MIXSPLG[1:0]
-48dB TO 14dB
6dB
SPEAKER
LEFT PGA
SPKLP
SPKLGND
SPK_VDD
SPKRGND
SPKLN
SPKRP
SPKRN
MAX98090
ZDEN
VS2EN
ZSEN