max98088 Maxim Integrated Products, Inc., max98088 Datasheet - Page 71
max98088
Manufacturer Part Number
max98088
Description
Stereo Audio Codec With Flexsound Technology
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX98088.pdf
(123 pages)
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Table 6. Record Path Signal Processing Registers (continued)
REGISTER
0x3F
0x40
BIT
1
0
3
2
1
0
7
6
5
4
3
2
AGCHLD
AGCATK
AGCTH
NAME
ANTH
AGC Attack Time
Defined as the time required to reduce gain by 63% of the total gain reduction (one time
constant of the exponential response). Attack times are longer for low AGC threshold
levels. See Figure 12 for details.
00 = 2ms
01 = 7.2ms
10 = 31ms
11 = 123ms
AGC Hold Time
The delay before the AGC release begins. The hold time counter starts whenever the
signal drops below the AGC threshold and is reset by any signal that exceeds the
threshold. Set AGCHLD to enable the AGC circuit. See Figure 12 for details.
00 = AGC disabled
01 = 50ms
10 = 100ms
11 = 400ms
Noise Gate Threshold
Gain is reduced for signals below the threshold to quiet noise. The thresholds are relative
to the ADC’s full-scale output voltage.
AGC Threshold
Gain is reduced when signals exceed the threshold to prevent clipping. The thresholds
are relative to the ADC’s full-scale voltage.
VALUE
VALUE
with FLEXSOUND Technology
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Noise gate disabled
THRESHOLD
THRESHOLD
Reserved
Reserved
(dBFS)
(dBFS)
-64
-62
-58
-53
-50
-10
-3
-4
-5
-6
-7
-8
-9
Stereo Audio Codec
DESCRIPTION
VALUE
VALUE
0xA
0xB
0xC
0xD
0xE
0xA
0xB
0xC
0xD
0xE
0x8
0x9
0xF
0x8
0x9
0xF
THRESHOLD
THRESHOLD
(dBFS)
(dBFS)
-45
-41
-38
-34
-30
-27
-22
-16
-11
-12
-13
-14
-15
-16
-17
-18
71
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