Datasheet CXA1279BS Datasheet (Sony)

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E99336-TE

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.

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

PD 900 mW

Operating Condition

Supply voltage VCC 8.5 to 12.5 V

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

TV Sound Processor

22 pin SDIP (Plastic)

CXA1279BS

Block Diagram and Pin Configuration

REG

VCA

TVIN2

GND

AUXIN2

INSW

CH2

CL2

BASS

TREBLE

OUT2

N.C

VREG

TVIN1

V

CC

AUXIN1

N.C

CH1

CL1

VOLUME

BALANCE

OUT1

VRS

CREF

TONE

VCA

1 2 3 4 5 6 7 8 9

10 11

1213141516171819202122

CONTROL

&

BIAS

—2—

CXA1279BS

Pin No.

1

3

4

5

Symbol

TV-IN2

AUX-IN2

INSW

CH2

3

36k

VCC/2

12k

V

CC

12µ

2k

V

CC

60µ

4

7k

2.7k

2.8k 2.8k

2.7k

VCC

180µ 180µ

5

Description

TV mode input pin.

AUX mode input pin.

Mode select pin.

External pin of HPF capacitor.

1

36k

VCC/2

12k

V

CC

12µ

Pin Description (Ta=25 °C VCC=9 V)

Voltage

4.5 V

—

4.5 V

Equivalent circuit

—3—

CXA1279BS

Pin No.

6

7

8

9

10

Symbol

CL2

BASS

TREBLE

OUT2

N.C

5.2k

25k

20k

5.2k

V

CC

50µ CREF/20k

CREF

7

8

5.2k

25k

20k

5.2k

V

CC

50µ CREF/20k

CREF

500

V

CC

9

Description

External pin of LPF capacitor.

BASS control pin.

TREBLE control pin.

Output pin.

—

6.3k

2.8k

2.8k 2.8k

2.8k

4.5V

VCC

180µ 180µ

6

Voltage

4.5 V

(CREF)

4.5 V

(CREF)

4.5 V

—

Equivalent circuit

10

—4—

CXA1279BS

No.

11

12

13

14

Symbol

VREG

CREF

VRS

OUT1

1k

V

CC

30µ

12

1k

6k

V

CC

30µ

6k 15k

16k 16k

13

1k

500

V

CC

14

Description

REGULATOR output pin.

Input pin of control reference voltage.

Reference voltage pin. Voltage VCC/2.

Output pin.

120

VCC

11

Voltage

2.5 V

—

4.5 V

Equivalent circuit

—5—

CXA1279BS

Pin No.

15

16

17

18

19

Symbol

BALANCE

VOLUME

CL1

CH1

N.C

47k

140µ

8k

10k

V

CC

16

6.3k

2.8k

2.8k 2.8k

2.8k

4.5V

VCC

180µ 180µ

17

7k

2.7k

2.8k 2.8k

2.7k

VCC

180µ 180µ

18

Description

BALANCE control pin.

VOLUME control pin.

External pin of LPF capacitor.

External pin of HPF capacitor.

—

25k

20k

5.2k 5.2k

V

CC

CREF/20k

CREF

15

Voltage

4.5 V

(CREF)

—

4.5 V

—

Equivalent circuit

19

—6—

CXA1279BS

No.

20

22

Symbol

AUX-IN1

TV-IN1

36k

12k

4.5V

V

CC

12µ

22

Description

AUX mode input pin.

TV mode input pin.

36k

12k

4.5V

V

CC

12µ

20

Voltage

4.5 V

Equivalent circuit

—7—

CXA1279BS

Electrical Characteristics (Ta=25 °C)

No.

1

2

3

4

5

6

7

8

9

10

11

12

Item

Current

consumption 1

Current

consumption 2

TV Gain

1, 2

AUX Gain

1, 2

TV REF

level 1, 2

FLAT f response

characteristics

100 Hz

FLAT f response

characteristics

10 kHz

GAIN VOL

MIN 1, 2

BASS BOOST

100 Hz 1, 2

TREBLE BOOST

10 kHz 1, 2

BASS CUT

100 Hz 1, 2

TREBLE CUT

10 kHz 1, 2

Symbol

I

CC-9

I

CC-12

VTVF

1, 2

VAUXF

1, 2

VTVREF

1, 2

VTVFL

1, 2

VTVFH

1, 2

VVOL

MIN

V

BST L

VBST H

VCUT L

VCUT H

Bias conditions (V)

INSW BASS TRE BAL VOL V

CC

0 4.5 4.5 4.5 9.0 9.0

6.0 6.0 6.0 12.0 12.0

4.5 4.5 4.5 9.0 9.0

3.0

0 4.5

0

9.0 9.0 4.5

00

CREF

VRS

Input

TV-IN

1, 2

AUX-IN

1, 2

TV-IN

1, 2

Input

signal

1 kHz

1.8 Vrms

100 Hz

1.8 Vrms

10 kHz

1.8 Vrms

1 kHz

1.8 Vrms

100 Hz

1.8 Vrms

10 kHz

1.8 Vrms

100 Hz

1.8 Vrms

10 kHz

1.8 Vrms

Output

OUT

1, 2

Remarks

Input is taken as

reference.

Output of

respective channel

1 kHz is taken as

reference.

Input is taken

as reference.

Output of

respective channel

FLAT 1 kHz is taken

as reference.

Min. Typ. Max. Unit

12 18 25 mA

17 24 34 mA

–3.0 –1.0 +1.0 dB

–17 –15 –11 dB

–1.5 0 +1.5 dB

— — –70 dB

7.0 10.5 12.0 dB

7.5 10.5 12.5 dB

–12.0 –10.5 –7.0 dB

–12.5 –10.5 –7.5 dB

—8—

CXA1279BS

No.

13

14

15

16

17

18

19

20

21

22

23

24

25

Item

BALANCE BOOST

1 kHz 1

BALANCE CUT

1 kHz 1

BALANCE BOOST

1 kHz 2

BALANCE CUT

1 kHz 2

DISTORTION-1

1 kHz 1, 2

DISTORTION-2

1 kHz 1, 2

Cross-Talk

TV

→ AUX

Cross-Talk

AUX

→ TV

Cross-Talk

TV1

→ TV2

Cross-Talk

TV2

→ TV1

Cross-Talk

AUX1

→ AUX2

Cross-Talk

AUX2

→ AUX1

REGULATOR

DC OUTPUT

Symbol

V

BAL

BST 1

VBAL

CUT 1

VBAL

BST 2

VBAL

CUT 2

Vdist F

MAX

CTLKTACTLKATCTLK

TT1

CTLK

TT2

CTLK

AA1

CTLK

AA2

VREG

Bias conditions (V)

INSW BASS TRE BAL VOL V

CC

0 4.5 4.5 9.0 4.5 9.0

0

9.0 9.0

4.5

3.0

0

3.0

0

CREF

VRS

Input

TV-IN

1

TV-IN2TV-IN

1, 2

AUX-IN

1, 2

TV-IN1TV-IN

2

AUX-IN1AUX-IN

2

Input

signal

1 kHz

1.8 Vrms

1 kHz

420

mVrms

1 kHz

1.8 Vrms

Output

OUT

1

OUT

2

OUT

1, 2

OUT2OUT1OUT2OUT

1

Pin 11

DC

Remarks

Output of FLAT

1 kHz is taken

as reference.

Min. Typ. Max. Unit

0 1.0 2.0 dB

— — –30 dB

0 1.0 2.0 dB

— — –30 dB

— — 1.0 %

— — 2.0 %

— — –70 dB

2.2 2.5 2.8 V

DC

—9—

CXA1279BS

No.

26

27

28

29

30

Item

NOISE LEVEL

1, 2

DC OFFset 1

DC OFFset 2

DC OFFset 3

DC OFFset 4

Symbol

NL

V

OFFset 1

VOFFset 2

VOFFset 3

VOFFset 4

Bias conditions (V)

INSW BASS TRE BAL VOL V

CC

0 4.5 4.5 4.5 9.0 9.0

4.5

↓

0

4.5

↓

9.0

4.5

↓

0

4.5

↓

9.0

CREF

VRS

Input

signal

Output

OUT

1, 2

Remarks

30 kHz LPF used.

Min. Typ. Max. Unit

— — –60 dBm

–1.0 0 1.0 V

DC

–1.0 0 1.0 VDC

—10—

CXA1279BS

C5

0.01µ

C1

10µ

C2

10µ

R4

10k

R2

10k

R3

10k

R1

10k

C4

10µ

C10

10µ

C11

47µ

C12

1µ

R6

10k

R5

10k

C3

10µ

C9

10µ

C6

0.01µ

C7

0.33µ

C8

0.33µ

AC

REG

VCA

TVIN2

GND

AUXIN2

INSW

CH2

CL2

BASS

TREBLE

OUT2

N.C

VREG

TVIN1

V

CC

AUXIN1

N.C

CH1

CL1

VOLUME

BALANCE

OUT1

VRS

CREF

DIST

ACV

DIST

AUX-IN1

TV-IN1

TV-IN2

AUX-IN2

0-VCC CONTROL

0-5V CONTROL

DC 2.5V

OUT1

OUT2

TONE

TONE VCA

1 2 3 4 5 6 7 8 9

10 11

1213141516171819202122

CONTROL

&

BIAS

Electrical Characteristics Circuit

—11—

CXA1279BS

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.

Application Circuit

C5

0.01µ

C1

10µ

C2

10µ

C4

10µ

C10

10µ

C11

47µ

C12

1µ

C3

10µ

C9

10µ

C6

0.01µ

C7

0.33µ

C8

0.33µ

REG

VCA

TVIN2

GND

AUXIN2

INSW

CH2

CL2

BASS

TREBLE

OUT2

N.C

VREG

TVIN1

V

CC

AUXIN1

N.C

CH1

CL1

VOLUME

BALANCE

OUT1

VRS

CREF

AUX-IN1

TV-IN1

TV-IN2

AUX-IN2

0-VCC CONTROL

0-5V CONTROL

DC 2.5V

OUT1

OUT2

TONE

TONE VCA

1 2 3 4 5 6 7 8 9

10 11

1213141516171819202122

CONTROL

&

BIAS

—12—

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.).

—13—

CXA1279BS

20

10

100 1k 10k

0

–10

–20

BASS-TREBLE MAX.

BASS-TREBLE MIN.

TONE characteristecs

CH. vs. TREBLE-CONTROL (MAX)

CL. vs. BASS-CONTROL (MAX)

Frequency (Hz)

Gain (dB)

OUT 1, 2 (dB)

12.0

10.0

8.0

6.0

4.0

2.0 0

0.1µ

0.01µ 4700p

1000p

0.047µ

1k 10k

Frequency (Hz)

OUT 1, 2 (dB)

12.0

10.0

8.0

6.0

4.0

2.0 0

1.5µ

0.33µ

0.033µ

0.15µ

3.3µ

100 1k

—14—

CXA1279BS

1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

VOLUME (VDC)

OUT 1, 2 (dB)

VOLUME CONTROL characteristics

1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0

–4

–2

0

+2

+4

+6

+8

+10

+12

–6

–8 –10 –12

BASS (VDC)

OUT 1, 2 (dB)

BASS CONTROL characteristics

1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0

0

–10

–20

–30

–40

–50

–60

–70

–80

–90

BALANCE (V

DC)

OUT 1, 2 (dB)

BALANCE CONTROL characteristics

OUT1 OUT2

1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0

–4

–2

0

+2

+4

+6

+8

+10

+12

–6

–8 –10 –12

TREBLE (V

DC)

OUT 1, 2 (dB)

TREBLE CONTROL characteristics

INPUT : 100Hz INPUT : 100kHz

SONY CODE EIAJ CODE

JEDEC CODE

PACKAGE STRUCTURE

MOLDING COMPOUND LEAD TREATMENT LEAD MATERIAL PACKAGE MASS

EPOXY RESIN

SOLDER PLATING

COPPER ALLOY

22PIN SDIP (PLASTIC)

SDIP-22P-01 SDIP022-P-0300

0.95g

1.778

11

12

1

22

19.2 – 0.1

+ 0.4

7.62

6.4 – 0.1

+ 0.3

0.25 – 0.05

+ 0.1

0° to 15°

0.5 ± 0.1

0.9 – 0.1

+ 0.15

3.25 – 0.2

+ 0.15

0.51 MIN

3.9 – 0.1

+ 0.4

1.All mat surface type.

Two kinds of package surface:

2.All mirror surface type.

Package Outline Unit : mm

CXA1279BS

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