Datasheet
Maxim Integrated
│
93
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Analog Line Inputs
The device includes multiple line level input options
and two analog line input programmable gain amplifiers
(PGAs, Figure 9). The line input structure supports mul-
tiple configurations including stereo single-ended inputs,
stereo differential inputs, and stereo mixed single-ended
inputs (any two per line input mixer).
Analog Line Input Mixers
The analog line input mixer allows the selection of either
single-ended or differential inputs to each line input chan-
nel (Table 21). The line A input mixer can accept single-
ended inputs from IN1, IN3, and IN5, or a differential input
from IN3 and IN4 (IN3 - IN4). The line B input mixer can
accept single-ended inputs from IN2, IN4, and IN6, or a
Table 21. Line Input Mixer Configuration Register
Figure 9. Analog Line Input Functional Diagram
ADDRESS: 0x0D
DESCRIPTION
BIT NAME TYPE POR
7 IN34DIFF R/W 0 Selects IN3, IN4 differentially as an input to the line A mixer.
6 IN65DIFF R/W 0 Selects IN6, IN5 differentially as an input to the line B mixer (WLP only).
5 IN1SEEN R/W 0 Selects IN1 single ended as an input to the line A mixer.
4 IN2SEEN R/W 0 Selects IN2 single ended as an input to the line B mixer.
3 IN3SEEN R/W 0 Selects IN3 single ended as an input to the line A mixer.
2 IN4SEEN R/W 0 Selects IN4 single ended as an input to the line B mixer.
1 IN5SEEN R/W 0 Selects IN5 single ended as an input to the line A mixer (WLP only).
0 IN6SEEN R/W 0 Selects IN6 single ended as an input to the line B mixer (WLP only).
MIXG135
IN1-IN2
IN3-IN4
IN5-IN6
MIC 1
MIC 2
LINE A
LINE B
ADC
LEFT
MIXER
ANALOG
OUTPUT
MIXERS
MIXADR[6:0]
MIXADL[6:0]
IN1-IN2
IN3-IN4
IN5-IN6
MIC 1
MIC 2
LINE A
LINE B
ADC
RIGHT
MIXER
-6dB TO 20dB
-6dB TO 20dB
-6dB/0dB
-6dB/0dB
LINEAEN
EXTBUFA
IN2SEEN
IN4SEEN
IN6SEEN
IN65DIFF
LINE A
PGA
LINE B
PGA
LINEBEN
EXTBUFB
LINAPGA[2:0]
LINE A
INPUT
MIXER
MIXG246
LINE B
INPUT
MIXER
IN3
IN1 IN1/DMD
IN2/DMC
IN6
IN5
IN3
IN4
(WLP ONLY)
IN3-IN4
MIC 1
MIC 1
MIC 2
MIC 2
IN5
IN4
IN2
IN6-IN5
IN6
LINBPGA[2:0]
IN1SEEN
IN3SEEN
IN5SEEN
IN34DIFF
MAX98090