Sony CXA1782CQ Datasheet

CXA1782CQ/CR

For the availability of this product, please contact the sales office.

RF Signal Processing Servo Amplifier for CD players

Description

The CXA1782CQ/CR is a bipolar IC with built-in RF signal processing and various servo ICs. A CD player servo can be configured by using this IC, DSP and driver.

Features

• Low operating voltage (VCC – VEE = 3.0 to 11.0V)

• Low power consumption (39mW, VCC = 3.0V)

• Supports pickup of either current output, voltage

output

• Automatic adjustment comparator for tracking

balance gain

• Single power supply and positive/negative dual

power supplies

Applications

• RF I-V amplifier, RF amplifier

• Focus and tracking error amplifier

• APC circuit

• Mirror detection circuit

• Defect detection and prevention circuits

• Focus servo control

• Tracking servo control

• Sled servo control

• Comparators of tracking adjustment for balance

and gain

CXA1782CQ

48 pin QFP (Plastic)

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 833 (CXA1782CQ) mW

457 (CXA1782CR) mW

Recommended Operating Condition

Operating supply voltage

VCC – VEE 3.0 to 11.0 V

CXA1782CR

48 pin LQFP (Plastic)

Structure

Bipolar silicon monolithic IC

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 –

E95908C78

Block Diagram

CXA1782CQ/CR

FE_BIAS

V

TEO

LPFI

TEI

ATSC

TZC

TDFCT

VC

LD

PHD2

36

APC

RF IV AMP2

37

38

F

F IV AMP

39

E

40

EI

EE

41 42

43

44

45

46

47

48

E IV AMP

BAL2

BAL1

TOG2

TOG1

•WINDOW COMP.

PHD1

35

RF IV AMP1

FE AMP

TE AMP

BAL3

TOG3

ATSC

34

DFCT

PHD

33

FOK

TTL

I IL

DFCT

FS4

RF_M

32

LEVEL S

FZC COMP

TZC COMP

TM1

RF_O

RF_I

31

30

MIRR

•I IL DATA REGISTER •INPUT SHIFT REGISTER

•ADRESS.DECODER

LPF COMPHPF COMP

•FCS PHASE COMPENSATION

FS2

CP

CB

29

•OUTPUT DECODER

TOG1 to 3

FS1 to 4 TG1 to 2 TM1 to 7 PS1 to 4

BAL1 to 3

•TRACKING PHASE COMPENSATION

TG1

FS1

DFCT

TG2

TM7

CC1

TM6

TM5 TM4

TM3

CC2

262728

•F SET

25

I IL

TTL

I IL

•I SET

FOK

TM2

SENS

24

C.OUT

23

XRST

22

DATA

21

XLT

20

CLK

19

Vcc

18

ISET

17

SL_O

16

SL_M

15

14

SL_P

13

TA_O

1

FEO

2

3

FEI

FDFCT

4

FGD

FLB

FE_O

7

FE_M

8

SRCH

9

6

5

TGU

10

11

12

TG2

FSET

TA_M

• The switch state in Block Diagram is for initial resetting.

• Switch turns to side for 1 and to side for 0 in Serial Data Truth Table.

• DFCT switch turns to side when defect signal generates for DEFECT = E in Serial Data Truth Table.

• TG1 switch turns to side and TG2 switch is left open when TG1 and TG2 (address 1 : D3) is 1.

°

•

– 2 –

Pin Description

CXA1782CQ/CR

Pin No.

1 FEO

2

FEI

FDFCT

3

Symbol

I/O

O

I

Equivalent circuit

25p

1

3

147

174k

51k

300µ

2

147

10k

100k

9k

Focus error amplifier output. Connected internally to the FZC comparator input.

Focus error input.

Capacitor connection pin for defect

Description

time constant.

4

5

6

13

16

FGD

FLB

FE_O

TA_O

SL_O

40k

68k

130k

20µ

147

I

4

5

Ground this pin through a capacitor when decreasing the focus servo high-frequency gain.

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

O

6

O

13 16

250µ

Focus drive output.

Tracking drive output.

Sled drive output.

FE_M

7

I

7

147

90k

Focus amplifier inverted input.

50k

– 3 –

CXA1782CQ/CR

Pin No.

8

9

10

Symbol

SRCH

TGU

TG2

I/O

Equivalent circuit

147

I

8

50k

110k

20k

9

11µ

External time constant setting pin for generating focus servo waveform.

External time constant setting pin for switching tracking high-frequency

Description

gain.

82k

External time constant setting pin for

I

10

470k

2µ

switching tracking high-frequency gain.

11

12

14

FSET

TA_M

SL_P

I

11

147k

High cut-off frequency setting pin for focus and tracking phase compensation amplifier.

15k 15k

147

100k

Tracking amplifier inverted input.

11µ

Sled amplifier non-inverted input.

I

12

I

147

14

15

SL_M

I

15

147

22µ

Sled amplifier inverted input.

– 4 –

CXA1782CQ/CR

Pin No.

17

Symbol

ISET

19 CLK

20

XLT

DATA

21

XRST

22

C. OUT

23

SENS

24

I/O

I

O

17

19 20

21 22

Equivalent circuit

147

23 24

1k

20k

100k

15µ

Description

Setting pin for Focus search, Track jump, and Sled kick current.

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

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

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

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

Track number count signal output.

Outputs FZC, DFCT, TZC, gain, balance, and others according to the command from CPU.

25

26

27

28

FOK

CC2

CC1

CB

20k

O

25

147

I

147 147

28

O

I

40k

100k

147

Focus OK comparator output.

Input for the DEFECT bottom hold output with capacitance coupled.

27

DEFECT bottom hold output.

26

Connection pin for DEFECT bottom hold capacitor.

– 5 –

CXA1782CQ/CR

Pin No.

29

30

31

32

Symbol

I/O

CP

RF_I

RF_O O

RF_M

Equivalent circuit

147

29

I

Connection pin for MIRR hold capacitor. MIRR comparator non-inverted

Description

input.

I

147

30

Input for the RF summing amplifier output with capacitance coupled.

RF sunning amplifier output. Eye-pattern check point.

147

31

147

I

RF summing amplifier inverted

32

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

33

34

35 36

LD

PHD

PHD1 PHD2

10k

147

1k

10k

17µ

100µ

11.6k

APC amplifier output.

APC amplifier input.

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

O

I

I I

33

34

35 36

– 6 –

CXA1782CQ/CR

Pin No.

37

38 39

Symbol

FE_BIAS

F E

I/O

Equivalent circuit

32k

I

I I

37

38 39

164k

25p

8µ

12p

260k

147

513

10µ

Bias adjustment of focus error amplifier.

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

Description

40

42

43

EI

TEO

LPFI

—

O

6.8k

102k 57k 28k

I-V amplifier E gain adjustment. (When not using automatic balance adjustment)

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

Comparator input for balance adjustment.

147

260k

12k

10k

147

20.3k

23k 11k 4.8k

150k

40

42

I

43

(Input from TEO through LPF)

– 7 –

CXA1782CQ/CR

Pin No.

44

47

45

Symbol

TEI

TDFCT

ATSC

I/O

Equivalent circuit

I

44

I

47

10k

45

147

100k

1k

100k

Tracking error input.

Capacitor connection pin for defect time constant.

100k

Window comparator input for ATSC detection.

1k

Description

46

48

TZC

VC

10k

50

75k

120

I

O

46

48

Tracking zero-cross comparator input.

(VCC + VEE)/2 DC voltage output.

– 8 –

Unit

mV

dB

CXA1782CQ/CR

V

mV

dB

V

mV

dB

Max.

Typ.

Ratings

10 14 20 mA

Min.

CC = 1.5V, VEE = –1.5V, Ta = 25°C)

–20 –14 –10 mA

(V

Measurement conditions

18

ment pin

Measure-

SD

17 18

41

RST

–50 0 50

25.1 28.1 31.1

1kHz input ratio

31

—

1.3

1.2

V1 = 100mVDC

–0.9 –0.3

—

V1 = –100mVDC

33.0

27.0 30.0 33.0

–120 0 120

1

27.0 30.0

V1 = 1kHz I/O ratio

–3.0 0 3.0

—

1.0 1.3

V1 = 100mVDC

–1.0

–1.3

—

V1 = 100mVDC

–3.43 –2.93

0.5 3.5 6.5

–25 0 25

42

–2.33 –1.83 –1.33dB–3.93

V1 = 1kHz TOG1, 2, 3: OFF

V1 = 1kHz TOG1: ON

Reference to F0

V1 = 1kHz TOG2: ON

3F

3E

3D

–0.6 2.4 5.4 dB

–6.69 –6.19 –5.69 dB

Reference to F0

V1 = 1kHz TOG3: ON

Reference to F0

V1 = 1kHz TOG1, 2, 3: OFF

37

3B

0.7

1.0

0.4

0.1

V1 = 1kHz BAL1: ON

0.7

0.4

Reference to E0

V1 = 1kHz BAL2: ON

Reference to E0

36

35

14 15 16 13 12 11 10

9

SW conditions

8 7 6

5 4 3 2 1

Item

O

O O

O

0

O

Offset

Voltage gain

Current consumption 1

Current consumption 2

T1

T2

T3

T4

Electrical Characteristics

Max. output voltage-High

Max. output voltage-Low

Offset

Voltage gain 1

RF amplifier

T5

T6

T7

Voltage gain 1

T8

T9

Voltage gain difference

Max. output voltage-High

Max. output voltage-Low

Offset

Voltage gain F

Voltage gain F1

T15

Voltage gain F2

T16

FE amplifierTE amplifier

T12

T13

T10

T11

T14

Voltage gain F3

T17

– 9 –

Voltage gain E0

T18

Voltage gain E1

T19

Voltage gain E2

T20

Unit

dB

CXA1782CQ/CR

V

mV

dB

V

mV

dB

V

—

1.68

Max.

0.6

1.38

Typ.

Ratings

1.08

0.5

Min.

Measurement conditions

V1 = 1kHz BAL3: ON

Reference to E0

V1 = 1VDC BAL2: ON

42

ment pin

Measure-

33

SD

3F

17 18

16

–0.5

–480

–0.6

—

–900

V1 = 1VDC BAL2: ON

V2 = 120mV

33

3F

O

380

–900

V2 = 145mV

O

500

1120

–180

–200

V2 = 170mV

0.8mA sink

O

O O

100

–100

48

24

53

51

21.0

18

49

T29 + T8 (or T9)

6

08

—

–35

Output gain difference between

SD = 00 and SD = 08.

00

1.3

1.0

V1 = 200mVDC

08

–1.0

–1.3

—

V1 = –200mVDC

08

–360

–500

–640

02

640

500

360

03

265

17.6

225

14.6

185

12.25

Pin 1 threshold (preliminary)

24

13

00

25

–39

20.1

18.1

16.1

T37 + T14

1.3

1.0

Output gain difference between

SD = 20 and SD = 25.

V1 = –0.5VDC

14 15 13 12 11 10

9

SW conditions

8 7 6

5 4

O 3 2 1

3

Item

O

Voltage gain E

Max. output voltage-High

Max. output voltage-Low

TE amplifierAPCFCS servoTRK servo

T21

T22

T23

Output voltage 1

Output voltage 2

Output voltage 3

T24

T25

T26

Output voltage 4

Center amplifier output

offset

DC voltage gain

T27

T28

T29

FCS total gain

Feed through

T30

T31

– 10 –

Max. output voltage-High

Max. output voltage-Low

Search voltage (–)

Search voltage (+)

FZC threshold

T32

T33

T34

T35

T36

DC voltage gain

TRK total gain

Feed through

T37

T38

T39

Max. output voltage-High

T40