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CXA2021S
I2C BUS Sound Processor for TV
Description The CXA2021S is a bipolar IC developed as an I2C BUS control sound processor for TV. This IC implements surround, tone control, balance, volume, mute and AGC functions. Features * I2C BUS control * The AGC circuit is adopted to absorb volume differences between input sources and improve the S/N ratio in hearing. Absolute Maximum Ratings * Supply voltage VCC 14 V * Operating temperature Topr -20 to +75 C * Storage temperature Tstg -65 to +150 C * Allowable power dissipation PD 0.9 W Recommended Operating Condition Supply voltage 8 to 13 22 pin SDIP (Plastic)
Structure Bipolar silicon monolithic IC Applications TVs
V
Pin Configuration
LOUT CH-L DET1 CL-L HPO SDA
12 11
VRS
L-IN
Vcc
HPI
PS
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
CL-R
BAL
VOL
ROUT
GND
BASS
CH-R
TRE
DET2
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.
R-IN
-1-
SCL
E95319-ST
CXA2021S
Block Diagram
I2C BUS SOUND PROCESSOR Surround Vcc L = L - (L - R) x 1 - SCR 1 + SCR 1 - SCR 1 + SCR R = 18K
150Hz HPF DET1 16 17 13 DET2 10 21
CH-L
CL-L
R = R + (L - R) x
19
20
AGC DET 1
AGC DET 2
L-IN 22 TONE VCA
LOUT
14
BASS PS TRE
VOL BAL
1 R-IN
TONE
VCA
ROUT 9
Vcc/2
DAC
BUS DEC
18 VRS
2
15
4
3
7
6
5
8
12
11
SDA SCL PS CH-R CL-R
GND
BASS TRE BAL VOL
-2-
CXA2021S
Pin Description Pin No. Symbol Voltage Equivalent circuit
Vcc 10 10k
(Ta = 25C, VCC = 12V) Description
1 22
R-IN L-IN
6V
1 22 130 30k Vcc 2
Input pins.
2
GND
0V
Vcc 250 250
GND pin.
3 20
CL-R CL-L
6V
11k 3 20 130
5.4k 11k
Pins for connecting external LPF capacitance (BASS).
Vcc 2
Vcc 250 250
4 19
CH-R CH-L
6V
5.7k 4 19 130
6k 5.7k
Pins for connecting external HPF capacitance (TREBLE).
Vcc 40k 20k
5 6 7 8
BAL TRE BASS VOL
2k
4.5V
5 6 7 8 2k
7.5V
DAC output pins. Connect LPF capacitance of DAC. Internal impedance is approximately 20k.
75
-3-
CXA2021S
Pin No.
Symbol
Voltage
Equivalent circuit
Vcc
Description
14
500
9 14
ROUT LOUT
6V
9 130 84k
500
5P
Output pins.
Vcc
200
200
10k
10
DET2
10 130
AGC detector output and control pin.
100k
100k
Vcc
100 50
11
SCL
11 4k
I2C bus clock line.
11k
3k
56k
Vcc
100 50
12
SDA
12 4k
I2C bus data line.
4.5k 3k 56k
-4-
CXA2021S
Pin No.
Symbol
Voltage
Equivalent circuit
Vcc 40k 13
Description
13
DET1
7.8V
AGC detector output. Connect capacitance for setting time constant.
2k
Vcc
10 18k 130
15
PS
6V
15
18k
Pin for connecting external capacitance of the surround phase shifter. Internal impedance is approximately 18k.
Vcc
10k
500
16
HPO
6V
16 500
AGC HPF output pin.
Vcc
10
5k
17
HPI
6V
17 130
AGC HPF input pin.
Vcc 2 16k 16k
-5-
CXA2021S
Pin No.
Symbol
Voltage
Equivalent circuit
Vcc 16k 16k
Description
30k
18
VRS
6V
18
1k
VCC reference voltage pin. 2
30k 30
21
VCC
12V
Power supply pin.
-6-
CXA2021S
Control Register Table DATA bit 7 bit 6 bit 5 bit 4
SLAVE ADDRESS = 82H (Power-ON setting value) bit 2 bit 1 bit 0 AGC: 0 = OFF , 1 = ON MUTE: 0 = OFF , 1 = ON
bit 3
VOLUME (00) BASS (00) TREBLE (00) BALANCE (00)
MUTE AGC (0) (0) MODE (0)
* VOLUME: Volume control for both L channel and R channel 00 = minimum value 3F = maximum value * MUTE: MUTE switch 0 = Mute OFF 1 = Mute ON (Mute state) * AGC switch 0 = AGC OFF 1 = AGC ON * BASS: Low-frequency control 00 = Minimum value 10 = Typical value 1F = Maximum value * MODE: Surround switch 0 = Surround OFF 1 = Surround ON * TREBLE: High-frequency control 00 = Minimum value 10 = Typical value 1F = Maximum value * BALANCE: Balance control for L channel and R channel 00 = L channel minimum, R channel maximum 20 = Typical 3F = L channel maximum, R channel minimum
-7-
R-IN L-IN
R1 C2 R2 10k
1 22
C1 R-IN L-IN 4.7 4.7
10k
21
2
GND Vcc
C3 C4
20 3
CL-R CL-L 0.1 C6
19
0.1 C5
4
CH-R CH-L
4700P C7
18 5
4700P C8 BAL VRS 47
Electrical Characteristics Measurement Circuit
4.7 C9
6
-8-
TRE
CXA2021S
17
HPI
4.7 C11
C10
0.1
16
7
BASS
HPO
4.7 C12
15 8
C13 VOL PS 10 C14
14 9
S1
PS
TP-PS
4.7 R3 10k
ROUT
ON C15 ROUT 10 LOUT 10 R4 10k
LOUT
C16
10
C17 DET2 R5 10 1MEG R6
11 12 SCL 13
DET1
4.7 R7 SCL 220 SDA 220
CXA2021S
SDA
CXA2021S
Application Circuit
L-IN
LOUT
SDA
4700P
4.7
0.1
C13
0.1
C15
47
10
4.7
C2
C17
C10 0.1
22
21
20
19
18
17
16
15
14
13
12
CH-L
DET1
CL-L
VRS
HPO
HPI
L-IN
PS
CXA2021S
ROUT
BASS
LOUT
GND
TRE
VOL
DET2
R-IN
CH-R
CL-R
1
2
3
4
5
6
7
8
9
10
11
4700P
4.7
0.1
4.7
4.7
4.7
4.7
C14
C9
C11
C12
C16
10
10
C1
C3
C5
C7
SCL 1MEG R1
SCL
BAL
SDA 220 R2
R-IN
Vcc
ROUT
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.
-9-
220
C4
C8
C6
R3
Electrical Characteristics
Input conditions AGC BASS BAL 20 16 31 50 10 10 0 MODE TRE 0 Input point Remarks Min. Typ. Max. Input signal SW set to ON Measure -ment point Unit
(Ta = 25C, VCC = 12V)
No. Measurement item
Symbol
VOL
MUTE
1
Current consumption L-IN R-IN REF: INPUT -2.0 -17 1kHz 2.4Vrms LOUT ROUT 0
ICC
3F
0
mA
2
FLAT L, R
VF L, R
2.0
dB
3
REF, Level L, R
VR L, R
20
-14
-11
dB
4
VOL MIN L, R 100Hz 2.4Vrms 10kHz 2.4Vrms 1F 1F 100Hz 2.4Vrms 10kHz 2.4Vrms 0 0 100Hz 2.4Vrms 10kHz 2.4Vrms 10 10 3F 1kHz 2.4Vrms LOUT REF: VR L, R
VMIN L, R
0
--
--
-70
dB
5
FLAT frequency response 100Hz
VLF L, R
20
-1.5
0
1.5
dB
6
FLAT frequency response 10kHz
VHF L, R
-1.5
0
1.5
dB
- 10 -
0 3F
7
BASS BOOST 100Hz
VBST LF
8.5
11
13.5
dB
8
TREBLE BOOST VBST HF 10kHz
8.5
11
13.5
dB
9
BASS CUT 100Hz
VCUT LF
-13.5
-11
-8.5
dB
10
TREBLE CUT 10kHz
VCUT HF
-13.5
-11
-8.5
dB
11
BALANCE BOOST L
VBAL
BST L
0
1.2
2.0
dB
12
BALANCE CUT L
VBAL CUT L
--
--
-30
dB
13
BALANCE BOOST R
VBAL BST R
ROUT
0
1.2
2.0
dB
CXA2021S
14
BALANCE CUT R
VBAL CUT R
--
--
-30
dB
Input conditions AGC TRE 10 20 L-IN R-IN -- -- 2.0 REF:INPUT -- -- -70 1kHz 2.4Vrms LOUT ROUT 0 10 0 BASS MODE BAL Input point Input signal Remarks Min. Typ. Max. Unit SW set to ON Measure -ment point %
No. Measurement item
Symbol
VOL
MUTE
15
Distortion L, R
Vdist
3F
0
16
Mute L, R
VMT L, R
1
dB
17 L-IN ROUT REF: VFR
Cross-Talk L R VCT L, R --
0
--
-70
dB
18 R-IN LOUT
Cross-Talk R L VCT R, L REF: VFL
--
--
-70
dB
19
NOISE LEVEL L, R LOUT ROUT L-IN R-IN 1kHz 50mVrms 1kHz 160mVrms 1kHz 2Vrms 1 L-IN 1kHz 2.5Vrms S1 TP-PS 1kHz 10mVrms
VNOI L, R
30kHz LPF
--
--
-60
dBm
20
AGC BOOST L, R
VGCB L, R
REF: AGC-OFF (0) REF: AGC-OFF (0) REF: AGC-OFF (0) REF: AGC-OFF (0)
0
2.5
5
dB
21
AGC BOOST2 L, R
VGCB2 L, R
5
7
10
dB
- 11 -
0 R-IN PS 1kHz 1.25Vrms 10 0 0
22
AGC NULL L, R
VGCN L, R
-2.5
-0.5
2
dB
23
AGC CUT L, R
VGCC L, R
0 1 0 1 0 1 0 1
-24
-20
-16
dB
24
SS DIF GAIN L
SDG L
-2
0
2
dB
25
SS DIF GAIN R
SDG R
-2
0
2
dB
26
SS MIX LEVEL L
SMX L
LOUT
3
6
9
dB
27
SS MIX LEVEL R
SMX R
ROUT
3
6
9
dB
28
DC OFF-Set 1
DO1
LOUT ROUT
-1
0
1
V CXA2021S
Input conditions AGC TRE 10 20 LOUT ROUT -1 0 1 -1 0 1 0 10 1F 0 10 BASS MODE BAL Input point Remarks Min. Typ. Max. Unit Input signal SW set to ON Measure -ment point V
No. Measurement item
Symbol
VOL
MUTE
29
DC OFF-Set 2
DO2
3F
0
30
DC OFF-Set 3
DO3
V
31
DC OFF-Set 4
DO4 -1
10 0 10 1F 0 0 1 10 REF: MODE 0 0 30kHz LPF -150 0
1
V
32
DC OFF-Set OFF SS
DOSS L, R
150
mV
33
VOL MIN NOISE L, R
VMINNO L, R
0
--
-92
-85
dBm
- 12 -
CXA2021S
CXA2021S
* AGC circuit The AGC circuit is incorporated in the input block. When AGC is turned ON, gain is 0dB for small signal input, boosted for medium signal input and reduced for large signal input. The AGC circuit can absorb volume differences between input sources. * Surround circuit L-R signals passing through the phase shifter are added to L channel and R channel each in the opposite phase. The transfer function of the phase shifter is obtained by the following equation: VO = 1 - SCR Vin 1 + SCR
where R is internal resistance 18k and C is external capacitance. * TONE circuit BASS and TREBLE tone control. BASS control characteristic can be determined by external capacitance connected to CL, and TREBLE control characteristic by external capacitance connected to CH. Tone control can be performed in 32 steps. * BALANCE and VOLUME circuits Controls BALANCE and VOLUME in 64 steps each. * DAC DAC circuit for controlling BASS, TREBLE, VOLUME and BALANCE. Internal impedance is approximately 20k. Connect external capacitance for LPF.
- 13 -
CXA2021S
TONE characteristic
20 BASS-TREBLE MAX.
OUT L, R [dB]
10
0 BASS-TREBLE MIN. -10
-20 100 Frequency [Hz] 1k 10k
CH. vs. TREBLE-CONTROL (MAX)
17.5 15.0 12.5 10.0 0.047
OUT L, R [dB]
0.022 7.5 4700p 5.0 2.5
2200p
470p 0.0 -2.5
10
100 Frequency [Hz]
1k
10k
100k
CL. vs. BASS-CONTROL (MAX)
17.5 15.0 12.5
OUT L, R [dB]
10.0 7.5 1 5.0 0.1
0.047 0.01
0.47 2.5 0.0 -2.5
10
100 Frequency [Hz]
1k
10k
100k
- 14 -
CXA2021S
VOL CONTROL characteristic
0 -10 -20 0 -10
BALANCE CONTROL characteristic
OUT R
OUT L
OUT L, R [dB]
-30 -40 -50 -60 -70 -80 10 20 30 3F
OUT L, R [dB]
-20 -30 -40 -50 -60 -70 -80 0 10 20 30 3F
BUS Data [VOL]
BUS Data [BALANCE]
BASS CONTROL characteristic
12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 0 4 8 C 10 14 18 1C 1F BUS Data [BASS] Input = 100Hz 12 10 8 6 4
TREBLE CONTROL characteristic
Input = 10kHz
OUT L, R [dB]
OUT L, R [dB]
2 0 -2 -4 -6 -8 -10 -12 0 4 8 C 10 14 18 1C 1F BUS Data [TREBLE]
AGC characteristic
1V
AGC = OFF
AGC = ON 100mV
OUT [rms]
10
10
100mV IN [rms]
1V
- 15 -
CXA2021S
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
PACKAGE STRUCTURE
MOLDING COMPOUND SONY CODE EIAJ CODE JEDEC CODE SDIP-22P-01 SDIP022-P-0300 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER PLATING COPPER ALLOY 0.95g
- 16 -
7.62
0 to 15

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