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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 BA3880AFS
MIXL
1
VCAL
2
+ + + + + HI MID + + + − VCA
22
OUTL
GND
1 CTL
24
DETL
LO
21
INL
DETR
2 CTL
23
VCC
3 HPF
20
APFL
DEFR
3 VCA − LO + + HI MID + + + + + + VCA
22
DEFR
DEFL
4 CTL LPF
19
HPFL
CTL
4
21
VCC
DETL
5
18
LPFL
VCAR
5
20
VCAL
GND
6
17
BIASC
MIXR
6
19
MIXL
DETR
7 CTL LPF
16
LPFR
OUTR
7
18
OUTL
DEFR
8 HPF VCA − + + + HI + MID + + + + LO
15
HPFR
INR
8 + + + + + HI MID LO + + + − LPF
17
INL
CTL
9
14
APFR
APFR
9 HPF
16
VCAR
10
13
INR
HPFR
10
15
APFL
MIXR
11
12
OUTR
LPFR
11 LPF
HPF
14
HPFL
BIASC
12
13
LPFL
BA3880AS / BA3880AFS
Audio ICs
!Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 11 1000 ∗ −40~+85 −55~+125 Unit V mW °C °C
∗ Reduced by 10mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions
Parameter Power supply voltage Symbol VCC Limits 5.4~10.8 Unit V
!Electrical characteristics (unless otherwise noted, Ta = 25°C, VCC = 9V, fIN = 1kHz, VIN = 200mVrms, Rg = 600Ω, RL = 100k Ω and VCTL = 4.5V)
Parameter Circuit current Voltage gain 1 Voltage gain 2 Voltage gain 3 Voltage gain 4 Voltage gain 5 Channel balance Maximum output voltage Output noise voltage 1 Output noise voltage 2 Total harmonic distortion 1 Total harmonic distortion 2 Channel separation Ripple rejection ratio Symbol Min. 3.9 −2.0 −2.5 −1.0 9.0 − −2.0 2.0 − − − − − 60 Typ. 5.9 0 −0.5 1.0 11.0 4.0 0 2.3 2 16 0.005 0.04 −67 68 Max. 11.8 2.0 1.5 4.0 13.0 − 2.0 − 10 70 0.05 0.4 −60 − Unit mA dB dB dB dB dB dB Vrms µVrms µVrms % % dB dB Conditions
ICC GV1 GV2 GV3 GV4 GV5
CB
VIN = 0Vrms VCTL = 9V
fIN = 10kHz fIN = 10kHz, VCTL = 0V fIN = 50Hz fIN = 10kHz, VCTL = 0V
THD = 1%
VOM VNO1 VNO2 THD1 THD2
CS RR
Rg = 0Ω, DIN AUDIO, VCTL = 9V Rg = 0Ω, DIN AUDIO
400Hz~30kHz BPF, VCTL = 9V 400Hz~30kHz BPF
VIN = 1Vrms Rg = 0Ω, fR = 100Hz, VR = 100mVrms
∗Note : When VCTL = 9V, the IC is in bypass mode (through operations). When VCTL = 4.5V, the IC is .