BA3880AS Datasheet, PDF (1/9 Pages) Rohm – High-definition sound processor

Audio ICs
BA3880AS / BA3880AFS
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
MIXL 1
VCAL 2
VCC 3
DEFL 4
DETL 5
GND 6
DETR 7
DEFR 8
CTL 9
VCAR 10
MIXR 11
+
+++
HI ⁺ MID LO
+++
−
VCA
HPF
CTL
LPF
CTL
LPF
VCA
−
+++
HI
+
+
+
M₊ID
LO
+
HPF
22 OUTL
21 INL
20 APFL
19 HPFL
18 LPFL
17 BIASC
16 LPFR
15 HPFR
14 APFR
13 INR
12 OUTR
BA3880AFS
GND 1
DETR 2
DEFR 3
CTL 4
CTL
VCA
VCAR 5
MIXR 6
OUTR ⁷
INR 8
APFR 9
HPFR ¹⁰
LPFR ¹¹
HPF
LPF
BIASC 12
24 DETL
CTL
23
+ − LO
++
HI MID
++
+
+
+
VCA
22 DEFR
21 VCC
20 _VCAL
19 MIXL
18 OUTL
+
+
+
++
HI
MID
+
+ ^L+O
−
17 INL
16
15 APFL
HPF
LPF
14 HPFL
13 LPFL