max98089 Maxim Integrated Products, Inc., max98089 Datasheet - Page 72
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max98089
Manufacturer Part Number
max98089
Description
Low-power, Stereo Audio Codec With Flexsound Technology
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX98089.pdf
(131 pages)
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Table 4. Line Input Registers
The IC’s stereo ADC accepts input from the microphone
amplifiers, line inputs amplifiers, and directly from the
INA1 and INA2. The ADC mixer routes any combina-
tion of the eight audio inputs to the left and right ADCs
(Figure 9).
REGISTER
0x37/0x38
0x47
BIT
6
2
1
0
7
6
���������������������������������������������������������������� Maxim Integrated Products 72
PGAINA/PGAINB
INAEXT/INBEXT
INADIFF
INBDIFF
NAME
ADC Input Mixers
Line Input A/B External Gain
Switches out the internal input resistor and selects a trimmed 20kI feedback resistor.
Use an external input resistor to set the gain of the line input.
0 = Disabled
1 = Enabled
Line Input A/B Internal Gain Settings
000 = +20dB
001 = +14dB
010 = +3dB
011 = 0dB
100 = -3dB
101 = -6dB
110 = -6dB
111 = -6dB
Line Input A Differential Enable
0 = Stereo single-ended input
1 = Mono differential input
Line Input B Differential Enable
0 = Stereo single-ended input
1 = Mono differential input
Low-Power, Stereo Audio Codec
with FlexSound Technology
Figure 9. ADC Input Mixer Block Diagram
DESCRIPTION
+
+
PA1EN:
0/20/30dB
PA2EN:
0/20/30dB
PGAINA:
+20dB TO -6dB
PGAINA:
+20dB TO -6dB
PGAINB:
+20dB TO -6dB
PGAINB:
+20dB TO -6dB
PGAM1:
+20dB TO 0dB
PGAM2:
+20dB TO 0dB
INADIFF
INBDIFF
MAX98089
MIXADL
MIXADR
MIX
MIX
ADLEN
ADREN
ADCL
ADCR
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