MAX9888 Maxim Integrated Products, MAX9888 Datasheet - Page 63

• Manufacturer Part Number: MAX9888
• Description: Stereo Audio CODEC
• Manufacturer: Maxim Integrated Products

DataSheet.in
Table 4. Line Input Registers
The device’s stereo ADC accepts input from the micro-
phone amplifiers and line inputs. The ADC mixer routes
any combination of the six audio inputs to the left and
right ADCs (Figure 9).
REGISTER
0x33/0x34
0x45
BIT
6
2
1
0
7
6
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
with FLEXSOUND Technology
Figure 9. ADC Input Mixer Block Diagram
Stereo Audio CODEC
DESCRIPTION
PA1EN:
0/20/30dB
PA2EN:
0/20/30dB
+
+
PGAM1:
+20dB TO 0dB
PGAM2:
+20dB TO 0dB
PGAINA:
+20dB TO -6dB
PGAINA:
+20dB TO -6dB
PGAINB:
+20dB TO -6dB
PGAINB:
+20dB TO -6dB
INADIFF
INBDIFF
MIXADL
MIXADR
MIX
MIX
ADLEN
ADREN
ADCR
ADCL
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