MAX98090BEWJ+T Maxim Integrated, MAX98090BEWJ+T Datasheet - Page 82

• Manufacturer Part Number: MAX98090BEWJ+T
• Description: Interface - CODECs 5V 130mW Stereo Headphone Amp
• Manufacturer: Maxim Integrated

MAX98090
Analog Microphone Inputs
The device includes three differential microphone inputs
(three for the WLP package and two for the TQFN pack-
age) and a programmable, low-noise microphone bias
for powering a wide variety of external micro phones
(Figure 6). By default, analog inputs IN1 and IN2 differen-
tially (IN1/IN2) provide the input to microphone amplifier
1, while IN3 and IN4 differentially (IN3/IN4) form the input
to microphone amplifier 2. For the WLP package, the
Figure 6. Analog Microphone Input Functional Diagram
www.maximintegrated.com
(WLP ONLY)
MICBIAS
IN1/DMD
IN2/DMC
IN5
IN6
IN3
IN4
IN1-IN2
IN5-IN6
IN3-IN4
IN5-IN6
EXTMIC[0]
EXTMIC[1]
INPUT
INPUT
MIC 1
MIC 2
MBEN
MUX
MUX
LINE A
LINE B
MICROPHONE
PA1EN[1:0]
PA2EN[1:0]
GENERATOR
MBVSEL[1:0]
PREAMP
PREAMP
MIC 1
MIC 2
BIAS
0dB
10dB
30dB
0dB
10dB
30dB
PGAM1[4:0]
PGAM2[4:0]
ZDENB
MIC 1
MIC 2
PGA
PGA
additional analog input pair (IN5 and IN6) can be con-
figured as a differential input (IN5 - IN6) to either micro-
phone amplifier 1 or 2 (Table 18).
In the typical application, one microphone input is used
for the handset microphone and the other is used as an
accessory microphone (IN1/IN2 and IN3/IN4). In systems
using a background noise microphone, IN5/IN6 (WLP
only) can be retasked as another microphone input.
0dB TO 20dB
0dB TO 20dB
MAX98090
Ultra-Low Power Stereo Audio Codec
IN1-IN2
IN3-IN4
IN5-IN6
IN1-IN2
IN3-IN4
IN5-IN6
LINE A
LINE B
LINE A
LINE B
MIC 1
MIC 2
MIC 1
MIC 2
MIXADR[6:0]
MIXADL[6:0]
MIXER
MIXER
RIGHT
LEFT
ADC
ADC
Maxim Integrated │ 82
ANALOG
OUTPUT
MIXERS