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CXA1279BS
TV Sound Processor
Description The CXA1279BS is a bipolar IC for TV sound control with functions such as tone control, volume and balance. Features * 2 type of inputs * Bass, Treble, Balance and Volume control operative in either 0 to VCC or 0 to 5 V. Applications TV Structure Bipolar silicon monolithic IC Absolute Maximum Ratings (Ta=25 C) * Supply voltage VCC 14 V * Operating temperature Topr -20 to +75 C * Storage temperature Tstg -65 to +150 C * Allowable power dissipation 900 mW PD Operating Condition Supply voltage 22 pin SDIP (Plastic)
VCC
8.5 to 12.5
V
Block Diagram and Pin Configuration
TVIN1
BALANCE
VOLUME
AUXIN1
VCC
22
21
20
19
18 TONE
17
16
15 VCA
14
13
12
CONTROL & BIAS TONE VCA
REG
1
TVIN2
2
GND
3
AUXIN2
4
INSW
5
CH2
6
CL2
7
BASS
8
TREBLE
9
OUT2
10 N.C
11 VREG
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
--1--
CREF
OUT1
VRS
CH1
CL1
N.C
E99336-TE
CXA1279BS
Pin Description Pin No. Symbol Voltage Equivalent circuit
(Ta=25 C VCC=9 V) Description
VCC 12 36k
1
TV-IN2
4.5 V
1
12k VCC/2
TV mode input pin.
VCC 12 36k
3
AUX-IN2
4.5 V
3
12k VCC/2
AUX mode input pin.
VCC 60 60
4
INSW
--
2k
Mode select pin.
4
60
VCC 180 2.7k 7k 180 2.7k
5
CH2
4.5 V
5
External pin of HPF capacitor.
2.8k
2.8k
--2--
CXA1279BS
Pin No.
Symbol
Voltage
Equivalent circuit
VCC 180 2.8k 180 2.8k
Description
6
6.3k
6
CL2
4.5 V
4.5V
External pin of LPF capacitor.
2.8k
2.8k
VCC 50 5.2k CREF/20k 5.2k
7
BASS
4.5 V (CREF)
25k
BASS control pin.
CREF
7
20k
VCC 50 5.2k CREF/20k 5.2k
8
TREBLE
4.5 V (CREF)
8
25k 20k CREF
TREBLE control pin.
VCC
500
9
OUT2
4.5 V
9
500
Output pin.
10
N.C
--
10
--
--3--
CXA1279BS
Pin No.
Symbol
Voltage
Equivalent circuit
Description
VCC
120 11
11
VREG
2.5 V
REGULATOR output pin.
VCC
12
CREF
--
1k 12 30
Input pin of control reference voltage.
VCC 16k 6k 16k
13
VRS
4.5 V
13 1k 6k 15k 1k 30
Reference voltage pin. Voltage VCC/2.
VCC
500
14
OUT1
4.5 V
14 500
Output pin.
--4--
CXA1279BS
Pin No.
Symbol
Voltage
Equivalent circuit
VCC CREF/20k
Description
15
BALANCE
4.5 V (CREF)
25k 15 20k
5.2k
5.2k
BALANCE control pin.
CREF
VCC 140 47k
16
VOLUME
--
16
8k
VOLUME control pin.
10k
VCC 180 2.8k 17 6.3k 180 2.8k
17
CL1
4.5 V
4.5V
External pin of LPF capacitor.
2.8k
2.8k
VCC 180 2.7k 7k 180 2.7k
18
CH1
4.5 V
18
External pin of HPF capacitor.
2.8k
2.8k
19
N.C
--
19
--
--5--
CXA1279BS
Pin No.
Symbol
Voltage
Equivalent circuit
Description
VCC 12 36k 20 12k 4.5V
20
AUX-IN1
4.5 V
AUX mode input pin.
VCC 12 36k 22 12k 4.5V
22
TV-IN1
4.5 V
TV mode input pin.
--6--
Electrical Characteristics
Bias conditions (V) INSW BASS TRE signal 12 17 TV-IN 1 kHz 1.8 Vrms 1, 2 reference. OUT Input is taken as 1, 2 AUX-IN 1, 2 4.5 1, 2 Output of 100 Hz 1.8 Vrms respective channel 1 kHz is taken as reference. 10 kHz 1.8 Vrms 1 kHz 1.8 Vrms 100 Hz 1.8 Vrms 10 kHz 1.8 Vrms 0 0 100 Hz 1.8 Vrms 10 kHz 1.8 Vrms Input is taken as reference. Output of 9.0 9.0 4.5 respective channel FLAT 1 kHz is taken as reference. 7.5 10.5 12.5 -12.0 -10.5 -7.0 -12.5 -10.5 -7.5 dB dB dB 7.0 10.5 12.0 dB -1.5 0 +1.5 dB TV-IN 24 34 18 25 mA mA dB dB -17 -15 -11 dB 0 6.0 4.5 3.0 0 4.5 4.5 9.0 9.0 6.0 6.0 12.0 12.0 4.5 4.5 4.5 9.0 9.0 VRS BAL VOL VCC CREF Remarks Min. Typ. Max. Unit Input Output Input
(Ta=25 C)
No.
Item
Symbol
1
Current
consumption 1
ICC-9
2
Current
consumption 2
ICC-12
3
TV Gain
VTVF
-3.0 -1.0 +1.0 -3.0 -1.0 +1.0
1, 2
1, 2
4
AUX Gain
VAUXF
1, 2
1, 2
5
TV REF
VTVREF
level 1, 2
1, 2
FLAT f response
6
characteristics
VTVFL
--7--
0
100 Hz
1, 2
FLAT f response
7
characteristics
VTVFH
-1.5
0
+1.5
dB
10 kHz
1, 2
8
GAIN VOL
VVOL
MIN 1, 2
MIN
--
--
-70
dB
9
BASS BOOST
100 Hz 1, 2
VBST L
10
TREBLE BOOST
10 kHz 1, 2
VBST H
11
BASS CUT
100 Hz 1, 2
VCUT L
CXA1279BS
12
TREBLE CUT
10 kHz 1, 2
VCUT H
No. INSW BASS TRE signal 1 kHz 1 kHz is taken 0 1.0 2.0 as reference. -- TV-IN OUT 0 2 2 9.0 1, 2 1 kHz 4.5 420 mVrms 1 kHz 1.8 Vrms 3.0 0 1, 2 TV-IN 1 TV-IN 2 3.0 AUX-IN 1 AUX-IN 2 0 OUT 2 OUT 1 OUT 2 OUT 1 Pin 11 DC AUX-IN 1, 2 OUT 9.0 TV-IN 1.0 -- -30 2.0 dB dB 1.8 Vrms 1 OUT Output of FLAT dB 0 1 4.5 4.5 9.0 4.5 9.0 VRS TV-IN BAL VOL VCC Remarks Min. Typ. Max. Unit
Item CREF Output
Symbol
Bias conditions (V) Input Input
13
BALANCE BOOST
VBAL
1 kHz 1 0
BST 1
14
BALANCE CUT
VBAL
1 kHz 1
CUT 1
15
BALANCE BOOST
VBAL
1 kHz 2
BST 2
16
BALANCE CUT
VBAL
--
--
-30
dB
1 kHz 2
CUT 2
17
DISTORTION-1
1 kHz 1, 2
Vdist F
--
--
1.0
%
18
DISTORTION-2
Vdist F
-- -- -- -- -- -- -- 2.2
-- -- -- -- -- -- -- 2.5
2.0 -70 -70 -70 -70 -70 -70 2.8
% dB dB dB dB dB dB VDC
--8--
1 kHz 1, 2
MAX
19
Cross-Talk
CTLK
TV AUX
TA
20
Cross-Talk
CTLK
AUX TV
AT
21
Cross-Talk
CTLK
TV1 TV2
TT1
22
Cross-Talk
CTLK
TV2 TV1
TT2
23
Cross-Talk
CTLK
AUX1 AUX2
AA1
24
Cross-Talk
CTLK
AUX2 AUX1
AA2
CXA1279BS
25
REGULATOR
DC OUTPUT
VREG
No. INSW BASS TRE 0 1, 2 -1.0 0 1.0 4.5
Item BAL 4.5 9.0 9.0 VRS -- -- OUT 30 kHz LPF used. -60 dBm VOL VCC CREF signal Min. Typ. Max. Unit 4.5 4.5
Symbol Output Remarks
Bias conditions (V) Input
Input
26
NOISE LEVEL
1, 2
NL
27 0 4.5
DC OFFset 1
VOFFset 1
VDC
28 9.0 4.5 4.5 0 4.5

DC OFFset 2
VOFFset 2
-1.0
0
1.0
VDC
29
DC OFFset 3
VOFFset 3
-1.0
0
1.0
VDC
30 9.0
DC OFFset 4
VOFFset 4
-1.0
0
1.0
VDC
--9--
CXA1279BS
Electrical Characteristics Circuit
AUX-IN1 OUT1
TV-IN1 R4 10k AUXIN1 N.C CH1 CL1 VOLUME BALANCE OUT1 VRS TVIN1 VCC CREF C2 10 C4 10 C6 0.01 C8 0.33 C10 10 C11 47 C12 1
R6 10k
ACV DIST
R2 10k
0-VCC CONTROL 0-5V CONTROL 12
22 TONE VCA
21
20
19
18
17
16
15
14
13
GND
CH2
CL2
N.C
INSW
TVIN2
BASS
OUT2
AUXIN2
R1 10k C1 10 C3 10 C5 0.01 TV-IN2
R3 10k
TREBLE
C7 0.33
C9 10 R5 10k OUT2 DIST ACV
AUX-IN2
VREG
--10--
TONE VCA
CONTROL & BIAS REG
AC
1
2
3
4
5
6
7
8
9
10
11 DC 2.5V
CXA1279BS
Application Circuit
AUX-IN1 OUT1
TV-IN1 C2 10 C4 10 C6 0.01 N.C CH1 CL1 VOLUME BALANCE OUT1 VRS CREF VCC AUXIN1 C10 10 C11 47 TVIN1 C8 0.33 C12 1 0-VCC CONTROL 0-5V CONTROL
22 TONE VCA CONTROL & BIAS REG
21
20
19
18
17
16
15
14
13
12
GND
CH2
CL2
N.C
INSW
TVIN2
BASS
OUT2
AUXIN2
C1 10 C3 10
C5 0.01
C7 0.33
TREBLE
C9 10
TV-IN2 OUT2
AUX-IN2
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
VREG
--11--
TONE VCA
1
2
3
4
5
6
7
8
9
10
11 DC 2.5V
CXA1279BS
CXA1279BS
Description of Operation Signals input to TV-IN and AUX-IN are switched through INSW (Input Switch) and input to Tone Control circuit. In the Tone Control circuit, Tone Control for Bass and Treble is executed at the cut off frequency determined by the respective external capacitor. Tone controlled signals are Balance and Volume controlled at the VCA circuit and output through the output buffer. The control of Bass, Treble, Balance and Volume respectively is performed with CREF pin voltage as reference. Accordingly when control is used from 0 to VCC, VCC/2 is applied to CREF (connected to VRS pin). To control from 0 to 5 VDC, 2.5 VDC is applied to CREF for usage (connected to VREG pin or half the voltage of 5 V supply microcomputer is applied for offset.).
--12--
CXA1279BS
TONE characteristecs
20 BASS-TREBLE MAX. Gain (dB) 10
0
-10 BASS-TREBLE MIN. -20 100 1k 10k Frequency (Hz)
CH. vs. TREBLE-CONTROL (MAX) 12.0 10.0 OUT 1, 2 (dB) 8.0 6.0 0.01 4.0 2.0 0 4700p 1000p 0.1
0.047
1k Frequency (Hz)
10k
CL. vs. BASS-CONTROL (MAX) 12.0 10.0 OUT 1, 2 (dB) 8.0 6.0 3.3 4.0 2.0 0 1.5 0.33 0.15 0.033
100 Frequency (Hz)
1k
--13--
CXA1279BS
VOLUME CONTROL characteristics
BALANCE CONTROL characteristics
0 -10 -20 -30 -40 -50 -60 -70 -80 -90
0 -10 OUT1 -20 -30 -40 -50 -60 -70 -80 -90 OUT2
OUT 1, 2 (dB)
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 VOLUME (VDC)
OUT 1, 2 (dB)
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 BALANCE (VDC)
BASS CONTROL characteristics +12 +10 +8 +6 OUT 1, 2 (dB) OUT 1, 2 (dB) +4 +2 0 -2 -4 -6 -8 -10 -12 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 BASS (VDC) +12 +10 +8 +6 +4 +2 0 -2 -4 -6 -8 -10 -12
TREBLE CONTROL characteristics
INPUT : 100Hz
INPUT : 100kHz
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 TREBLE (VDC)
--14--
CXA1279BS
Package Outline
Unit : mm
22PIN SDIP (PLASTIC)
+ 0.1 0.05 0.25 -
+ 0.4 19.2 - 0.1
22
12
+ 0.3 6.4 - 0.1
1 1.778
11
0.5 0.1 + 0.15 0.9 - 0.1
+ 0.15 3.25 - 0.2
0.51 MIN
+ 0.4 3.9 - 0.1
7.62
0 to 15
Two kinds of package surface: 1.All mat surface type. 2.All mirror surface type.
PACKAGE STRUCTURE
MOLDING COMPOUND SONY CODE EIAJ CODE JEDEC CODE SDIP-22P-01 SDIP022-P-0300 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER PLATING COPPER ALLOY 0.95g
--15--

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