Datasheet CXA2021S Datasheet (Sony)

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.

CXA2021S

22 pin SDIP (Plastic)

Structure

Bipolar silicon monolithic IC

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 V

Pin Configuration

21

Vcc

20

CL-L

19

CH-L

VRS

18

L-IN

22

Applications

TVs

HPI

17

16

HPO

PS

1415

LOUT

13

DET1

SDA

12

BAL

6

TRE

7

BASS

8

1

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

2

3

GND

4

CL-R

5

CH-R

– 1 –

VOL

9

ROUT

10

DET2

11

SCL

E95319-ST

Block Diagram

150Hz HPF

DET1 DET2

2

C BUS SOUND PROCESSOR

I

Vcc

CH-L

CL-L

Surround

L = L – (L – R) ×

R = R + (L – R) ×

1 – SCR 1 + SCR

CXA2021S

R = 18K

22

13

17

16

AGC DET 1 AGC DET 2

L-IN

1

R-IN

Vcc/2

18

10

VRS

GND

21

PS

15

2

PS

19

TONE VCA

BASS

TRE

TONE VCA

4

CL-R

CH-R

20

LOUT

14

VOL BAL

ROUT

DAC BUS DEC

6

5

3

7

8

12

11

SDA SCL

9

– 2 –

BASS TRE BAL VOL

CXA2021S

Pin Description (Ta = 25°C, VCC = 12V)

Pin No. Symbol Voltage Equivalent circuit Description

Vcc

10µ

10k

130

30k

Vcc

2

22

1

R-IN L-IN

6V Input pins.

1

22

2 GND 0V GND pin.

Vcc

Pins for connecting external LPF capacitance (BASS).

Vcc

2

Vcc

20

250µ

3

CL-R CL-L

6V

3

20

11k

130

250µ

5.4k 11k

250µ

19

40k

2k

6k

20k

75µ

5.7k

7.5V

Pins for connecting external HPF capacitance (TREBLE).

DAC output pins. Connect LPF capacitance of DAC. Internal impedance is approximately 20kΩ.

4

5 6 7 8

CH-R CH-L

BAL TRE BASS VOL

6V

19

4.5V

5.7k

4

130

Vcc

5 6 7

8

– 3 –

Pin No. Symbol Voltage Equivalent circuit Description

Vcc

5P

CXA2021S

9

14

ROUT LOUT

10 DET2

10

14

9

130

500 500

84k

Vcc

200200

10k

AGC detector output and

130

100k100k

Vcc

control pin.

6V Output pins.

100µ

50µ

11 SCL I2C bus clock line.

12 SDA I2C bus data line.

11

12

4k

3k11k 56k

4.5k 3k

Vcc

100µ

50µ

56k

– 4 –

Pin No. Symbol Voltage Equivalent circuit Description

Vcc

40k

13

AGC detector output.

13 DET1 7.8V

Connect capacitance for setting time constant.

2k

Vcc

10µ

Pin for connecting external capacitance of the surround phase shifter.

15 PS 6V

18k

130

15

Internal impedance is

18k

approximately 18kΩ.

CXA2021S

Vcc

500

10k

16 HPO 6V AGC HPF output pin.

17 HPI 6V AGC HPF input pin.

16

500

Vcc

10µ

5k

17

130

Vcc

2

16k16k

– 5 –

Pin No. Symbol Voltage Equivalent circuit Description

Vcc

16k 16k

30k

VCC

18 VRS 6V

18

1k

reference voltage pin.

2

CXA2021S

30k

30µ

21 VCC 12V Power supply pin.

– 6 –

Control Register Table SLAVE ADDRESS = 82H

CXA2021S

DATA

bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0

VOLUME (00)

BASS (00) TREBLE (00)

BALANCE (00)

∗

MUTE

MODE

(0)

∗

AGC

(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)

(Power-ON setting value)

AGC: 0 = OFF , 1 = ON MUTE: 0 = OFF , 1 = ON

• 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 –

Electrical Characteristics Measurement Circuit

CXA2021S

TP-PS

L-IN

R-IN

C1

R1

R2

C2

22

1

L-IN

R-IN

10k

4.7µ

10k

21

2

Vcc

GND

C3

C4

20

3

CL-L

CL-R

0.1µ

C5

C6

19

CH-R

4

CH-L

4700P

C7

C8

18

5

VRS

BAL

47µ

4.7µ

17

HPI

CXA2021S

TRE

6

C9

4.7µ

C10

0.1µ 16

C11

HPO

BASS

7

4.7µ

S1

PS

C13

C12

8

PS

VOL

ON

10µ

4.7µ

R4

C15

1415

9

C14

R3

LOUT

10k

10µ

LOUT

ROUT

10µ

10k

C17

13

10

C16

DET1

DET2

10µ

4.7µ

R5

SDA

R7

12

SDA

SCL

11

R6

1MEG

220

ROUT

SCL

– 8 –

Application Circuit

CXA2021S

C1

L-IN

C2

22

1

L-IN

R-IN

4.7µ

21

2

Vcc

GND

C3

C4

20

3

CL-L

CL-R

0.1µ

C5

C6

19

4

CH-L

CH-R

4700P

C7

C8

18

5

VRS

BAL

47µ

4.7µ

17

HPI

CXA2021S

TRE

6

C9

4.7µ

C10

0.1µ 16

C11

HPO

BASS

7

4.7µ

C13

C12

8

PS

VOL

0.1µ

4.7µ

LOUT

C15

1415

9

C14

10µ

LOUT

ROUT

10µ

C17

13

10

C16

DET1

DET2

10µ

4.7µ

R1

SDA

R3

12

11

R2

1MEG

220

SDA

SCL

220

R-IN

ROUT

SCL

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 –

mA

50

dB

2.0

dB

–11

dB

–70

dB

1.5

dB

1.5

dB

13.5

dB

13.5

dB

–8.5

dB

–8.5

dB

2.0

dB

–30

dB

2.0

CXA2021S

dB

–30

Min. Typ. Max. Unit

Remarks

Measure

-ment

point

SW set

to ON

Input

signal

point

Input

31

16

0

–2.0

REF: INPUT

LOUT

ROUT

1kHz

2.4Vrms

L-IN

R-IN

–14

–17

0

–1.5

R L, R

REF: V

2.4Vrms

0

–1.5

10kHz

2.4Vrms

11

8.5

100Hz

2.4Vrms

11

8.5

10kHz

2.4Vrms

–11

–13.5

100Hz

2.4Vrms

–11

–13.5

10kHz

2.4Vrms

1.2

0

LOUT

1kHz

2.4Vrms

—

1.2

0

—

ROUT

—

100Hz

20

BAL

10

0

BASS MODE TRE

Input conditions

AGC

0 0 10

MUTE

3F

VOL

CC

I

VF L, R

20

VR L, R

0

VMIN L, R

20

VLF L, R

VHF L, R

1F

VBST LF

VBST HF

0

VCUT LF

VCUT HF

3F

10

VBAL BST L

0

VBAL CUT L

VBAL BST R

3F

VBAL CUT R

Electrical Characteristics (Ta = 25°C, VCC = 12V)

No. Measurement item Symbol

Current

consumption

1

FLAT

2

L, R

REF, Level

L, R

VOL MIN

3

L, R

4

FLAT frequency

response 100Hz

FLAT frequency

response 10kHz

5

6

– 10 –

BASS BOOST

100Hz

TREBLE BOOST

10kHz

7

8

BASS CUT

100Hz

TREBLE CUT

9

10kHz

10

BALANCE

BOOST L

11

BALANCE

CUT L

12

BALANCE

BOOST R

13

BALANCE

CUT R

14

CXA2021S

Remarks Min. Typ. Max. Unit

Measure

-ment

point

SW set

to ON

Input

signal

%

2.0

—

LOUT

ROUT

1kHz

2.4Vrms

dB

–70

—

REF:INPUT

dB

–70

—

FR

REF: V

ROUT

dB

–70

—

REF: VFL

LOUT

dBm

–60

—

30kHz LPF

LOUT

ROUT

dB

5

2.5

0

REF: AGC-OFF

1kHz

dB

10

7

5

(0)

REF: AGC-OFF

1kHz

10mVrms

50mVrms

dB

2

–16

–20

–0.5

–24

–2.5

(0)

REF: AGC-OFF

1kHz

160mVrms

(0)

REF: AGC-OFF

1kHz

2Vrms

dB

2

0

–2

TP-PS

S1

1kHz

2.5Vrms

dB

2

0

–2

dB

9

6

3

LOUT

1kHz

1.25Vrms

dB

9

6

3

ROUT

V

1

0

–1

LOUT

ROUT

L-IN

point

Input

20

BAL

10

TRE

0

10

Input conditions

0

3F

VOL MUTE AGC BASS MODE

Symbol

Vdist

R-IN

1

MT L, R

V

L-IN

0

VCT L, R

R-IN

VCT R, L

VNOI L, R

L-IN

0↓1

VGCB L, R

R-IN

0↓1

VGCB2 L, R

0↓1

VGCN L, R

0↓1

VGCC L, R

L-IN

1

0

SDG L

R-IN

SDG R

PS

SMX L

SMX R

10

0

↓

DO1

0

Distortion

Measurement item No.

L, R

15

Mute L, R 16

Cross-Talk L → R 17

Cross-Talk R → L 18

NOISE

LEVEL L, R

19

AGC

BOOST L, R

20

AGC

BOOST2 L, R

21

– 11 –

AGC

NULL L, R

22

AGC

CUT L, R

23

SS DIF

GAIN L

24

SS DIF

GAIN R

25

SS MIX

LEVEL L

26

SS MIX

LEVEL R

27

DC OFF-Set 1 28

CXA2021S

V

mV

dBm

150

–85

0

–92

1

0

Remarks Min. Typ. Max. Unit

Measure

-ment

point

SW set

to ON

Input

signal

point

Input

BAL

–1

LOUT

ROUT

20

–1

—

–150

30kHz LPF

REF: MODE 0

10

TRE

0

↓

10

Input conditions

0 0

3F

VOL MUTE AGC BASS MODE

DO2

1F

10

↓

10

DO3

0

↓

DO4

1F

10

0↓1

SS L, R

DO

0

VMINNO L, R

10

Measurement item Symbol No.

DC OFF-Set 2

DC OFF-Set 3

29

30

DC OFF-Set 4

DC OFF-Set

OFF → SS

31

32

VOL MIN

NOISE L, R

33

– 12 –

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:

1 – SCR

VO = Vin

1 + SCR

where R is internal resistance ≈ 18kΩ 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 20kΩ. Connect external capacitance for LPF.

– 13 –

20

10

0

OUT L, R [dB]

–10

CXA2021S

TONE characteristic

BASS-TREBLE MAX.

BASS-TREBLE MIN.

–20

17.5

15.0

12.5

10.0

7.5

5.0

OUT L, R [dB]

2.5

0.0

–2.5

100 1k 10k

Frequency [Hz]

CH. vs. TREBLE-CONTROL (MAX)

0.047µ

0.022µ

4700p

10 1k 10k

100 100k

Frequency [Hz]

2200p

470p

17.5

15.0

12.5

10.0

7.5

5.0

OUT L, R [dB]

2.5

0.0

–2.5

CL. vs. BASS-CONTROL (MAX)

0.047µ

0.1µ

1µ

0.47µ

10 1k 10k

100 100k

Frequency [Hz]

0.01µ

– 14 –

CXA2021S

0 –10 –20 –30 –40 –50

OUT L, R [dB]

–60 –70

–80

12 10

8 6

4 2

0

–2

OUT L, R [dB]

–4 –6

–8 –10 –12

VOL CONTROL characteristic

10 20 30 3F

BUS Data [VOL]

BASS CONTROL characteristic

Input = 100Hz

0 4 8 C 10 14 18 1C 1F

BUS Data [BASS]

1V

0

–10 –20

–30 –40

OUT L, R [dB]

–50 –60

–70 –80

12 10

8 6 4 2

0

–2

OUT L, R [dB]

–4 –6

–8 –10 –12

AGC characteristic

BALANCE CONTROL characteristic

OUT R

0

10 20 30 3F

BUS Data [BALANCE]

OUT L

TREBLE CONTROL characteristic

Input = 10kHz

0 4 8 C 10 14 18 1C 1F

BUS Data [TREBLE]

AGC = OFF

100mV

OUT [rms]

10

AGC = ON

10 100mV 1V

IN [rms]

– 15 –

Package Outline Unit: mm

19.2 – 0.1

CXA2021S

22PIN SDIP (PLASTIC)

+ 0.4

+ 0.1

0.25 – 0.05

22

1

SONY CODE EIAJ CODE

JEDEC CODE

1.778

0.5 ± 0.1 + 0.15

0.9 – 0.1

SDIP-22P-01 SDIP022-P-0300

12

+ 0.3

7.62

6.4 – 0.1

11

+ 0.4

3.9 – 0.1

0.51 MIN

+ 0.15

3.25 – 0.2

0° to 15°

PACKAGE STRUCTURE

MOLDING COMPOUND

LEAD TREATMENT LEAD MATERIAL

PACKAGE WEIGHT

EPOXY RESIN SOLDER PLATING

COPPER ALLOY

0.95g

– 16 –