FAB2200 Datasheet, PDF (26/33 Pages) Fairchild Semiconductor – Audio Subsystem with Stereo Class-G Headphone Amplifier and 1.2W Mono Class-D Speaker Amplifier

Address
B7
B6
B5
B4
B3
0x02
DIFFIN43 DIFFIN21
PGAIN43
default
0
0
0
0
0
DIFFIN43
1 = IN4 and IN3 are configured as a differential pair.
0 = IN4 and IN3 are independent.
DIFFIN21
1 = IN2 and IN1 are configured as a differential pair.
0 = IN2 and IN1 are independent.
PGAIN43
PGAIN43 sets the pre-amplifier gain for IN4 and IN3.
PGAIN21
PGAIN21 sets the pre-amplifier gain for IN2 and IN1.
PGAINxx [2:0]
000
001
010
011
Pre-Amplifier Gain (dB)
0
3
6
9
PGAINxx [2:0]
100
101
110
111
B2
B1
B0
PGAIN21
0
0
0
Pre-Amplifier Gain (dB)
12
15
18
21
Address B7
B6
B5
B4
B3
B2
B1
B0
0x03 SELSPA4 SELSPA3 SELSPA2 SELSPA1
HPRAMPSPEED
HPZCD HPRAMP
default
0
0
0
0
0
0
0
0
0x04 SELHPL4 SELHPL3 SELHPL2 SELHPL1 SELHPR4
SELHPR3
SELHPR2 SELHPR1
default
0
0
0
0
0
0
0
0
SELSPAx
1 = Channel INx is added to the speaker amplifier’s input.
0 = Channel INx is disconnected from the speaker amplifier’s input.
If all four SELSPAx bits are 0, the speaker amplifier is turned off and the SPKRP and SPKRN outputs stop switching.
SELHPLx
1 = Channel INx is added to the left headphone amplifier’s input.
0 = Channel INx is disconnected from left headphone amplifier’s input.
If all four SELHPLx bits are 0, the left headphone amplifier is turned off.
SELHPRx
1 = Channel INx is added to the right headphone amplifier’s input.
0 = Channel INx is disconnected from right headphone amplifier’s input.
If all four SELHPRx bits are 0, the right headphone amplifier is turned off.
HPRAMPSPEED
HPRAMPSPEED sets timing for the headphone amplifiers’ ramp function according to Table 4.
HPZCD
1 = Headphone amplifier zero-crossing detection is enabled.
0 = Headphone amplifier zero-crossing detection is disabled.
HPRAMP
1 = Headphone amplifier volume ramping is enabled.
0 = Headphone amplifier volume ramping is disabled.
© 2009 Fairchild Semiconductor Corporation
FAB2200 • Rev. 1.0.1
26
www.fairchildsemi.com