FAB2210 Datasheet, PDF (24/35 Pages) Fairchild Semiconductor – Audio Subsystem with Class-G Headphone and 3.3W Mono Class-D Speaker with Dynamic Range Compression

DPLT[2:0]
Sets the DRC’s limiter value, regardless of SVDD supply voltage. Also sets dynamic range compression threshold.
To avoid extraneous noise, do not change this setting while the speaker amplifier is on.
DPLT[2:0] Limiter Voltage (V_pk)
111
3.79
110
3.69
101
3.58
100
3.46
011
3.35
010
3.22
001
3.10
000
No Limit
Maximum Power with Sine Wave
and 8Ω Load (mW)
900
850
800
750
700
650
600
No Limit
DRC Threshold at
Class-D Output (dB V_pk)
-12.5
-12.7
-13.0
-13.3
-13.5
-13.8
-14.0
-12.5
HP_NG_RAT[2:0]
Sets the headphone noise gate threshold level. Detection is at the input to the headphone volume block.
HP_NG_RAT[2:0]
111
110
101
100
011
010
001
000
Threshold (mV_pk)
Reserved
Reserved
18
12
Noise Gate Disabled
Noise Gate Disabled
Noise Gate Disabled
Noise Gate Disabled
HP_NG_ATT[1:0]
Sets the headphone noise gate attenuation level.
HP_NG_ATT[1:0]
11
10
01
00
Attenuation Level (dB)
-6.0
-12.0
-18.0
Mute
ADDR
B7
0x83
0
Default
0
B6
B5
B4
B3
B2
0
NCLIP
SP_NG_RAT[2:0]
0
0
1
0
0
B1
B0
SP_NG_ATT[1:0]
0
0
NCLIP
1=Turns on the DRC’s clip limiter. Amount of clipping is set by DALC.
0=DRC clip limiter is disabled.
© 2011 Fairchild Semiconductor Corporation
FAB2210 • Rev. 1.1.1
24
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