BA3880AS / BA3880AFS
Audio ICs
High-definition sound processor
BA3880AS / BA3880AFS
The BA3880AS and BA3880AFS are sound processor ICs that perform phase and harmonic compensation on audio
signals to accurately reproduce the "rise" section of audio signals that determines the characteristics of the sound, and
thus reproduce the original recording as naturally as possible.
!Applications
Component stereo systems, radio cassette players, car stereo systems, televisions, VCRs, and active speakers.
!Features
1) Correct distortion in the rising section of audio signals that results from miss-matched speakers and amplifiers, and
reproduces the original sound faithfully.
2) To allow application with all types of speakers and sources, the clarity can be adjusted using DC control.
3) DC control provided for selection of either processor mode or bypass mode.
4) Bass boost fixed internally to 4dB.
!Block diagram
BA3880AS
1
2
3
4
5
6
7
8
9
10
11
MIXL
VCAL
VCC
DEFL
DETL
GND
DETR
DEFR
CTL
VCAR
MIXR
22
21
20
19
18
17
16
15
14
13
12
OUTL
INL
APFL
HPFL
LPFL
BIASC
LPFR
HPFR
APFR
INR
OUTR
+
+
CTL
+
+
VCA
−
+
+
+
HI MID LO
+
LPF
HPF
+
+
CTL
+
+
−
+
+
+
+
LPF
HPF
HI
MID
LO
VCA
BA3880AFS
1
2
3
4
5
6
7
8
9
10
11
MIXL
VCAL
VCC
DEFR
DETLGND
DETR
DEFR
CTL
VCAR
MIXR
22
21
20
19
18
17
16
15
14
1312
OUTL
INL
APFL
HPFL
LPFL
BIASC
LPFR
HPFR
APFR
INR
OUTR
+
+
−
+
+
+
+
+
HI MID
LO
24
23
LPF
CTL
VCA
+
CTL
VCA
+
+
+
−
+
+
+
HI MID
LO
+
+
HPF
LPF
HPF