Sony CXA2542AQ Datasheet

Description

The CXA2542AQ is a bipolar IC developed for CD

player RF signal processing and servo control.

Features

• Automatic focus bias adjustment circuit

• Automatic tracking balance and gain adjustment

circuits

• RF level control circuit

• Interruption countermeasure circuit

• Anti-shock circuit

• Defect detection and prevention circuits

• RF I-V amplifier, RF amplifier

• APC circuit

• Focus and tracking error amplifier

• Focus, tracking and sled servo control circuits

• Focus OK circuit

• Mirror detection circuit

• Single power supply and dual power supplies

Applications

CD players

Structure

Bipolar silicon monolithic IC

Absolute Maximum Ratings (Ta = 25°C)

• Supply voltage VCC 12 V

• Operating temperature Topr –20 to +75 °C

• Storage temperature Tstg –65 to +150 °C

• Allowable power dissipation

PD 1400 mW

Recommended Operating Conditions

Operating supply voltage VCC – VEE 3.0 to 3.6 V

4.5 to 5.5 V

– 1 –

CXA2542AQ

E97920-PS

RF Signal Processing Servo Amplifier for CD Player

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.

48 pin QFP (Plastic)

– 2 –

CXA2542AQ

Block Diagram

PS1-4TM1-7TG1-2FS1-4IFB1-6 BAL1-4 TOG1-4

DFCTO

FE AMP

FO. BIAS WINDOW COMP.

TGFL

TRK. GAIN WINDOW COMP.

F IV AMP

E IV AMP

VEE

VCC

TG1

TM1

DFCT

TRACKING PHASE COMPENSATION

IIL DATA REGISTER INPUT SHIFT REGISTER ADDRESS DECODER SENS SELECTOR OUTPUT DECODER

VEE

E-F BALANCE WINDOW COMP.

E

F

FEI

FDFCT

FLB

FE_O

FE_M

TA_M

TG2

TGU

SRCH

FGD

FSET

LD

RFTC

RF_M

RF_O

RF_I

CB

CC1

FOK

CC2

CP

PD1

PD

SL_P

SL_O

ISET

V

CC

CLK

DATA

XRST

SL_M

C. OUT

XLT

SENS1

PD2 IV AMP

PD1 IV AMP

VCC

VEE

APC

VEE

LASER POWER CONTROL

RF SUMMING AMP

VCC

VEE

LEVEL S

FZC

TZC

ATSC

BALL

BALH

TGL

TGH

FOL

FOH

LDON

LPCL

LPC

TGFL

VEE

VCC

MIRR

DFCT2

VEE

VCC

ISET

VCC

VEE

VCC

TM5

TM6

VEE

VCC

TM3

TM4

FSET

TG2

FOCUS PHASE COMPENSATION

TM7

VEE

VCC

FS1

FS2

DFCT

FS4

IIL

↓

TTL

42

44

45

46

48

2

3

4

6

7

8

9

10

11

12

1

13

27

28

29

30

39

38

36

35

34

31

32

33

14

15

16

17

18

19

20

21

22

23

24

25

26

TM2

VCC

FZC COMP.

TZC COMP.

ATSC WINDOW COMP.

MIRR

FOK

BAL1

BAL2

BAL3

BAL4

IFB1

VEE

VCC

IFB6

IFB5

IFB4

IFB3

IFB2

TOG1

TOG2

TOG3

TOG4

37

5

TA_O

SENS2

ATSC

LPFI

TEO

VC

TDFCT

TZC

FEO

FZC

PD2

47

40

41

43

IIL

↓

TTL

↓

IIL

VCC

VEE

VCC

VEE

VCC

VEE

CC1

XDFCT1

INT

– 3 –

CXA2542AQ

Pin Description

Pin No.

Symbol

I/O

Equivalent circuit

Description

1

FEI

I

2

FDFCT

I

Focus error input.

Connects the capacitor for defect time constant.

3

FGD

I

Ground this pin through a capacitor for cutting the focus servo highfrequency gain.

4

FLB

I

External time constant setting pin for boosting the focus servo lowfrequency.

5

FE_O

O

12

TA_O

O

15

SL_O

O

Focus drive output.

Tracking drive output.

Sled drive output.

6

FE_M

I

Focus amplifier inverted input.

147

50k

90k

2µ

6

250µ

5 12 15

147

100k

147

2

3µ

1

147

130k

68k

4µ

40k

470k

330k

3

4

7

SRCH

I

External time constant setting pin for generating the focus search waveform.

147

50k

11µ

20k

7

– 4 –

CXA2542AQ

8

TGU

I

External time constant setting pin for switching the tracking high-frequency gain.

9

TG2

I

External time constant setting pin for switching the tracking high-frequency gain.

10

FSET

I

Peak frequency setting pin for focus and tracking phase compensation amplifier.

11

TA_M

I

Tracking amplifier inverted input.

13

SL_P

I

14

SL_M

I

Sled amplifier non-inverted input.

Sled amplifier inverted input.

147

2µ

13

147

100k

11µ

11

147k

15k 15k

10

20k

110k

82k

147

8

423k

470k

9

16

ISET

I

Connect the external resistor to set the current which determines the Focus search, Track jump, and Sled kick levels.

147

50µ

16

147

22µ

14

Pin No.

Symbol

I/O

Equivalent circuit

Description

– 5 –

CXA2542AQ

18

CLK

I

20

DATA

I

17 VCC

I

Positive power supply.

Serial data input from CPU. (no pull-up resistance)

Serial data transfer clock input from CPU. (no pull-up resistance)

19

XLT

I

21

XRST

I

Latch input from CPU. (no pull-up resistance)

Reset input; resets at Low. (no pull-up resistance)

147

20µ

1k

18 20

147

20µ

4k

2.5p

19 21

22

C. OUT

O

23

SENS1

O

24 SENS2

O

Track number count signal output.

Outputs FZC, DFCT1, TZC, BALH, TGH, FOH, ATSC, and others according to the command from CPU.

Outputs DFCT2, MIRR, BALL, TGL, FOL, and others according to the command from the CPU.

100k

147

20k

22 23 24

VCC

17

25

FOK

O

Focus OK comparator output.

147

20k

100k

40k

25

Pin No.

Symbol

I/O

Equivalent circuit

Description

– 6 –

CXA2542AQ

26

CC2

I

28

CB

I

Input for the RF summing amplifier output with capacitance coupled.

Connects the defect bottom hold capacitor.

147

43k

39k

26

75k

147

28

7.6k

240k

29

CP

I

Connects the MIRR hold capacitor. MIRR comparator non-inverted input.

30

RF_I

I

31

RF_O O

32

RF_M

I

27

CC1

O

1.5k

100k

29

147

10k10k

30

31

32

147

27

Input for the RF summing amplifier output with capacitance coupled.

RF summing amplifier output. Eyepattern check point.

RF summing amplifier inverted input. The RF amplifier gain is determined by the resistance connected between this pin and RFO pin.

RF summing amplifier output. Used for the defect capacitance coupling.

33

RFTC

I

External time constant setting pin during RF level control.

147

50µ

10µ

50µ

33

Pin No.

Symbol

I/O

Equivalent circuit

Description

– 7 –

CXA2542AQ

34

LD

O

APC amplifier output.

35

PD

I

APC amplifier input.

36 37

PD1 PD2

I I

RF I-V amplifier inverted input. Connect these pins to the photo diode A + C and B + D pins.

147

10k

8.65k

100µ

2k

8k

36 37

0.2p

147

8µ

20µ

55k

10k

35

1k

10k

34

38 39

F E

I I

F I-V and E I-V amplifier inverted input. Connect these pins to photo diodes F and E pins.

147

260k

12p

500

10µ

38 39

VEE

40

VEE

—

Negative power supply.

Pin No.

Symbol

I/O

Equivalent circuit

Description

– 8 –

CXA2542AQ

43

ATSC

I

44

TZC

I

Window comparator input for ATSC detection.

Tracking zero-cross comparator input.

41

TEO

O

Tracking error amplifier output. E-F signal is output.

45

TDFCT

I

Connects the capacitor for defect time constant.

147

75k

10µ

44

147

1k

100k

1k

10µ 10µ

43

42

LPFI

I

Comparator input for balance adjustment. (Input from TEO through LPF)

147

7µ

42

147

32k 15k 3k15k

20k

150k

6.6k

147

100k

3µ

41

45

Pin No.

Symbol

I/O

Equivalent circuit

Description

– 9 –

CXA2542AQ

46

VC

O

(VCC + VEE)/2 DC voltage output.

VC

50

120

46

15k

47

FZC

I

Focus zero-cross comparator input.

147

7µ

300k

6k

54k

47

48 FEO

O

Focus error amplifier output. Connected internally to the window comparator input for bias adjustment.

147

25p

174k

10µ

300µ

48

Pin No.

Symbol

I/O

Equivalent circuit

Description

– 10 –

CXA2542AQ

TEST

T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

T11

T12

T13

T14

T15

T16

T17

T18

T19

T20

Current consumption 1

Current consumption 2

Center amplifier output offset

Offset

Voltage gain

Max. output amplitude - High

Max. output amplitude - Low

Offset

Voltage gain 1

Voltage gain 2

Voltage gain difference

Max. output voltage – High

Max. output voltage – Low

BIAS0

BIAS1

BIAS2

BIAS3

BIAS4

BIAS5

BIAS6

19 (OFF)

10, 13

10

13

10

RST

39F

3BF

3BE

3BD

3BB

3B7

3AF

39F

17

40

—

36 37

36

37

36

17

40

46

31

48

1kHz I/O ratio

V2 = 0.2VDC

1FB6: ON

1kHz I/O ratio

V2 = 100mVDC

IFB1, 2, 3, 4, 5, 6: OFF

IFB1: ON, BIAS0: reference

IFB2: ON, BIAS0: reference Output gain difference with T15

IFB3: ON, BIAS0: reference Output gain difference with V17

IFB4: ON, BIAS0: reference Output gain difference with V18

IFB5: ON, BIAS0: reference Output gain difference with V19

IFB6: ON, BIAS0: reference Output gain difference with V20

12.0

–25.0

–100

–70

16.5

1.2

—

–120

15.6

–3

1

—

560

–29.0

5

18.5

–18.5

0

–13

19.5

1.4

–1.3

0

18.6

0

1.4

–1.3

718

–22.7

6

25.0

–12.0

100

70

22.5

—

–1.0

120

21.6

3

—

–1

1042

–16.5

7

mA

mV

dB

V

mV

dB

V

mV

dB

Item

SW conditions (ON switches)

SD

Input pin

Measurement conditions

Min. Typ. Max. Unit

Electrical Characteristics (VCC = 1.5V, VEE = 1.5V, Topr = 25°C)

RF amplifierFE amplifier

Measurement pin

– 11 –

CXA2542AQ

FOH threshold value

FOL threshold value

Offset

GAIN UP (F)

GAIN UP (E)

Voltage gain F0

Voltage gain F1

Voltage gain F2

Voltage gain F3

Voltage gain F4

Voltage gain E0

Voltage gain E1

Voltage gain E2

Voltage gain E3

Voltage gain E4

Max. output voltage – High

Max. output voltage – Low

Output voltage 1

Output voltage 2

Output voltage 3

Output voltage 4

LD OFF

T21

T22

T23

T24

T25

T26

T27

T28

T29

T30

T31

T32

T33

T34

T35

T36

T37

T38

T39

T40

T41

T42

14

15

14

15

1

9

38 39

38

39

38

39

38

39

35

39F

34F 308

36F 308

34F

34E 30F

34D

34B

347 34F

30F

00

30E

30D

30B

307

34F 308

3C4

3C0

48

41

34

I

FB6: ON Pin 1 voltage when SENS1 (Pin 23) goes from High to Low

IFB6: ON Pin 1 voltage when SENS2 (Pin 24) goes from High to Low

TOG: OFF, BAL1, 2, 3: ON

V1 = 2 kHz, I/O ratio TOG: OFF, BAL1, 2, 3: ON

V1 = 2kHz, TOG: OFF I/O ratio

V1 = 2kHz, TOG1: ON Reference to F0

V1 = 2kHz, TOG2: ON Reference to F0

V1 = 2kHz, TOG3: ON Reference to F0

V1 = 2kHz, TOG4: ON Reference to F0

V1 = 2kHz, BAL: OFF I/O ratio

V1 = 2kHz, BAL1: ON Reference to E0

V1 = 2kHz, BAL2: ON Reference to E0

V1 = 2kHz, BAL3: ON Reference to E0

V1 = 2kHz, BAL4: ON Reference to E0

V1 = 1VDC, TOG: OFF, BAL1, 2, 3: ON

I1 = 364µA

I1 = 439µA

I1 = 515µA

0.8mA sink

I1 = 515µA, LD: OFF

5

–35

–25

7.2

1.2

–2.3

–3.9

–6.9

–11.1

–1.6

0.16

0.58

1.43

2.96

0.5

—

–900

–693

163

–200

1.1

20

–20

0

10.2

4.2

–1.8

–3.4

–6.4

–10.6

1.4

0.46

0.88

1.73

3.26

0.7

–0.8

–704

–293

613

132

1.3

35

–5

25

13.2

7.2

–1.3

–2.9

–5.9

–10.1

4.4

0.76

1.18

2.03

3.56

—

–0.5

–500

107

1063

500

—

mV

dB

V

mV

V

FE amplifierTE amplifierAPC

TEST Item

SW conditions (ON switches)

SD

Input pin

Measurement pin

Measurement conditions

Min. Typ. Max. Unit

– 12 –

CXA2542AQ

T43

T44

T45

T46

T47

T48

T49

T50

T51

T52

T53

T54

T55

T56

T57

T58

T59

T60

T61

T62

T63

T64

50% limit

30% limit

–50% limit

–30% limit

DC voltage gain

FCS total gain

Feed through 1

FZC threshold value

Max. output voltage – High

Max. output voltage – Low

Search voltage (–)

Search voltage (+)

DC voltage gain

TRK total gain

Feed through 1

Max. output voltage – High

Max. output voltage – Low

Jump output voltage (–)

Jump output voltage (+)

ATSC threshold value (–)

ATSC threshold value (+)

TZC threshold value

8

10, 13

1

20

1

5, 17

18

3C7

3C5

3C7

3C5

08

—

00 08

00

08

02

03

25

—

20 25

2C

28

10

20

35 30

35 36 37

1

—

1

47

1

—

38

—

38

43

44

34

5

—

5

47

5

12

—

12

43

44

I1 = 273µA Output difference with LPC ON/OFF

I1 = 333µA Output difference with LPC ON/OFF

I1 = 742µA Output difference with LPC ON/OFF

I1 = 667µA Output difference with LPC ON/OFF

T9 + T47

I/O gain difference between SD = 00 and SD = 08

Pin 47 voltage when SENS1 (Pin 23) goes from Low to High

V1 = 200mVDC

V1 = –200mVDC

DC gain between TEO and TA_O

T26 + T55

I/O gain difference between SD = 20 and SD = 25.

V1 = –0.3VDC

V1 = 0.3VDC

Input voltage when TG2

(Pin 9) goes from Vcc/2 to Vcc

Input voltage when TG2 (Pin 9) goes from Vcc/2 to Vcc

Pin 44 voltage when SENS1 (Pin 23) is 0V

725

315

–1421

–1215

17.4

37.5

—

123

1

—

–721

399

11.4

16.8

—

1

—

–652

437

–25

7

–20

1330

915

–816

–615

20.9

39.5

—

150

1.3

–1.3

–581

539

14.6

18.8

—

1.3

–1.3

–512

577

–15

15

0

1935

1515

–211

–15

24.4

41.5

–30

177

—

–1

–441

679

17.8

20.8

–39

—

–1

–372

717

–7

25

20

mV

dB

mV

V

mV

dB

V

mV

RF level controllFocus servoTracking servo

TEST Item

SW conditions (ON switches)

SD

Input pin

Measurement conditions

Min. Typ. Max. Unit

Measurement pin

– 13 –

CXA2542AQ

T65

T66

T67

T68

T69

T70

T71

T72

T73

T74

T75

T76

T77

T78

T79

T80

T81

T82

BAL COMP threshold value – High

BAL COMP threshold value – Low

GAIN COMP threshold value – High

GAIN COMP threshold value – Low

FOK threshold value

Voltage gain

Feed through

Max. output voltage – High

Max. output voltage – Low

Kick voltage 1

Kick voltage 2

Max. operating frequency 1

Min. input operating voltage 1

Max. input operating voltage 1

Min. operating frequency 1

Max. operating frequency 1

Min. input operating voltage 1

Max. input operating voltage 1

16

14

8

6, 7

6

8

10, 11, 12, 13

300

308 34F

—

25

20 25

25

20

10

42

38

30

13

—

30

36 37

42

41

25

15

24

23

Pin 42 voltage when SENS1 (Pin 23) goes from High to Low

Pin 42 voltage when SENS2 (Pin 24) goes from High to Low

Pin 41 voltage when SENS1 (Pin 23) goes from High to Low

Pin 41 voltage when SENS2 (Pin 24) goes from Low to High

Pin 30 voltage when Pin 25 is 0V

V1 = 100Hz, I/O ratio

I/O

gain difference between

SD = 20 and SD = 25.

V1 = 400mVDC

REV × 1

FWD × 1

Measures at SENS2 pin.

Measures at SENS1 pin.

5

–35

168

127

–560

50

—

1

—

–750

450

30

—

1.8

—

2.5

—

1.6

20

–20

193

145

–510

—

1.3

–1.3

–600

600

—

35

–5

218

163

–450

—

–34

—

–1

–450

750

—

0.3

—

1

—

0.5

—

mV

dB

V

mV

kHz

Vp-p

kHz

Vp-p

Tracking servoFOKSled servoMIRRORDEFECT

TEST Item

SW conditions (ON switches)

SD

Input pin

Measurement conditions

Min. Typ. Max. Unit

Measurement pin

– 14 –

CXA2542AQ

GND

R19

10k

C4

0.1µ

S3

S2

R9

47k

C3

1000P

S1

C1 1000P

S19

S16

V2

AC

DC

I2

0.8mA

C5

1µ

R13

30k

S8

C7

0.01µ

C9

0.068µ

S7

R25 13k

S6

C11 47µ

R23

60k

R3

10k

V1

AC

DC

GND

C2 33µ

GND

S17GND

S18GND

GND

S20GND

GND

V

EE

GND

R1 390k

S15

R2 390k

S14

GND

GND GND

R11

13k

GND

R12

100k

S5

R15

10k

V

CC

R16

510k

V

CC

C8

0.01µ

R18

13k

GND

R17

100k

GND

R24 5.1k

GND

V

EE

R26 120k

VCC

GND

CLK

C10 33µ

XLT

DATA

XRST

VCC

R20 10k

VCC

R21 10k

VCC

R22 10k

VCC

GND

C6

0.01µ

GNDGND

R14

10k

R10

1M

V

EEVCC

R8

330

V

EEVCC

I1

0µA

GND

F

E

VEETEO

LPFI

ATSC

TZC

TDFCT

VC

SENS1

C. OUT

XRST

DATA

XLT

CLK

Vcc

ISET

SL_O

SL_M

SL_P

SENS2

FZC

13

14

15

16

17

18

19

20

21

22

23

24

39

38

37

41

42

45

46

47

40

44

43

FDFCT

FGD

FLB

FE_O

FE_M

SRCH

TGU

TG2

FSET

TA_M

TA_O

FEI

PD1

PD

LD

RF_M

RF_O

RF_I

CP

CB

CC1

FOK

RFTC

CC2

PD2

FEO

2

3

4

5

6

7

8

9

10

11

12

1

25

26

27

28

29

30

36

35

34

31

32

33

48

R5

240k

R6 240k

S11S12

R4

34k

R7

34k

S13

S10

S9

R26 100k

Electrical Characteristics Measurement Circuit

– 15 –

CXA2542AQ

Application Circuit 1 (±2.5V power supply)

PD1

PD

LD

RF_M

RF_O

RF_I

CP

CB

CC1

FOK

RFTC

CC2

Vcc

MICRO COMPUTER DSP

15k

22µ

3.3µ

DRIVER

100k

0.015µ

60k

V

EE

VEE

100k

150k

0.047µ

0.1µ

F

E

V

EE

TEO

LPFI

ATSC

TZC

TDFCT

VC

82k

F

E

8.2k

SENS1

C. OUT

XRST

DATA

XLT

CLK

Vcc

ISET

SL_O

SL_M

SL_P

SENS2

47k

330k

470p

0.022µ

FZC

13

14

15

16

17

18

19

20

21

22

23

24

39

38

37

41

42

45

46

47

40

44

43

0.01µ

0.1µ

680k

510k

0.015µ

2200p

0.1µ

0.1µ 100k

4.7µ

DRIVER

0.033µ

Vcc

100k

DRIVER

10k

0.068µ

0.01µ

0.033µ

0.01µ

30k

Vcc

22

100µ

1µ

10µH

100

500

V

EE

Vcc

1k

3.3µ

A C

B D

PD

LD

1M

1µ

VEE VEE

FDFCT

FGD

FLB

FE_O

FE_M

SRCH

TGU

TG2

FSET

TA_M

TA_O

FEI

PD2

FEO

2

3

4

5

6

7

8

9

10

11

12

1

25

26

27

28

29

30

36

35

34

31

32

33

48

Application Circuit 2 (Single +5V power supply)

Vcc

MICRO COMPUTER DSP

15k

22µ

3.3µ

DRIVER

100k

0.015µ

60k

100k

150k

0.047µ

0.1µ

F

E

V

EE

TEO

LPFI

ATSC

TZC

TDFCT

VC

82k

F

E

8.2k

SENS1

C. OUT

XRST

DATA

XLT

CLK

Vcc

ISET

SL_O

SL_M SL_P

SENS2

47k

330k

470p

0.022µ

FZC

13

14

15

16

17

18

19

20

21

22

23

24

39

38

37

41

42

45

46

47

40

44

43

0.01µ

0.1µ

680k

510k

0.015µ

2200p

0.1µ

0.1µ 100k

4.7µ

DRIVER

0.033µ

Vcc

100k

DRIVER

10k

0.068µ

0.01µ

0.033µ

0.01µ

30k

Vcc

22

100µ

1µ

10µH

100

500

Vcc

1k

3.3µ

A C

B D

PD

LD

1M

1µ

FDFCT

FGD

FLB

FE_O

FE_M

SRCH

TGU

TG2

FSET

TA_M

TA_O

FEI

PD1

PD

LD

RF_M

RF_O

RF_I

CP

CB

CC1

FOK

RFTC

CC2

PD2

FEO

2

3

4

5

6

7

8

9

10

11

12

1

25

26

27

28

29

30

36

35

34

31

32

33

48

Vcc

10µ

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.