Sony CXA3018R Datasheet

Demodulator for Satellite Receivers

Description

The CXA3018R is an IC designed for video signal demodulation for satellite broadcasting. This IC has most of the functions needed for demodulation, and provides stable video detection in combination with the CXA3008N.

Features

• PLL demodulation characteristics through built-in IF

AGC

• Compatible with both NTSC and PAL

• Applicable for 8 systems worldwide

• Keyed AFT input pin to support MUSE reception

• Output pin for 1st AGC control

• Built-in video clamp circuit

• C/N detection circuit

• Single 5 V power supply operation

CXA3018R

48 pin LQFP (Plastic)

Absolute Maximum Ratings (Ta = 25 °C)

• Supply voltage VCC –0.3 to 7.0 V

• Operating temperatureTopr –35 to +85 °C

• Storage temperature Tstg –55 to +150 °C

Operating Supply Voltage

VCC 4.50 to 5.50 V

Applications

NTSC/PAL system satellite receivers, etc.

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—

E95719-TE

CXA3018R

OSCB2

24

SWA IN

252627282930313233343536

SWB IN

SWC IN

LPF N

LPF P

AGC LPF

2ndAGCCONT

AGC

OPAmpIN P

OPAmpIN N

1AGC

OPAmpOUT

VCO

MIX

DET

2AGC

OSCE2

23

DCAMP

OSCE1

22

AGCAMP

OSCB1

21

GND3

20

OFF

SET

VCODR1

19

OSC GND

SWAMP

VCODR2

18

LOGIC

GND2

17

VIDEO GND

DEEM/VAMP

CLAMP1

VAMP OUT 16

VIDEO IN 15

CLAMP2 SYNC

AFT

SYNC IN

14

CNDET

CLAMP OUT

13

10 11 12

BGR C

CNOUT

CNLPF

CNCONT

CNIN

SH1

SH2

KEYED IN

ANA1

ANA2

2nd IFAGC

MTRX AGC

Block Diagram

CC

AGC

MTRX

RF V

37

CC1

V

38 IF1

39 IF2

40

GND1

RF GND

41

GCONT

42

DETOUT

—2—

43

BUFIN

BUF

44

BUFOUT

45

VAMPIN

CC

46

47

CC2

V

OFFSETADJ

REG

VIDEO V

48

VREG

AFT UP

1 2 3 4 5 6 7 8 9

AFT DOWN

Pin Description

No. DC AC

Symbol

1

AFT

UP

Typical pin voltage

4.9 V or

2

AFT

DOWN

0.1 V

CXA3018R

Equivalent circuit Description

VCC2

30k

1 2

AFT block digital output pins.

30k

GND2

3

4

5

6

7

ANA2

ANA1

KEYED-IN

SH2

SH1

1.3 V to

3.2 V

3.1 V

0.3V

3.0 V to

3.5 V

3.0 V to

3.5 V

VCC2

2k

AFT block filter pin. Connect to Pin 4 with a 47 kΩ resistor and

200

4

75k

200

2.5V

150

5

30k

2k

4k

2k

VCC2

GND2

3

CC2

V

to GND with a 10 µF capacitor.

AFT block reference output pin.

GND2

AFT block keyed input pin.

AFT block sample-and-hold

76

200

signal output pins. Connect to GND with a 0.1 µF capacitor.

GND2

12k 12k

VCC2

8

9

CNIN

CNCONT

2.1V

1.6 V to

4.4 V

–50

to

–20

dBm

150

8

9

150

20k

2k

8k

20k

5.7k

8k

2.2V

GND2

C/N detection block signal input pin.

VCC2

3V

C/N detection block gain adjustment pin.

GND2

—3—

CXA3018R

Pin No. DC AC

10

Symbol

CNLPF

Typical pin voltage

2.9 V

1.2 V

11

CNOUT

to

3.7 V

12

BGR-C

0.9 V

10

Equivalent circuit Description

200 200

VCC2

C/N detection block filter pin. Connect to GND with a 0.01 µF

8k 8k

capacitor.

GND2

100

60k

11

4k

VCC2

C/N detection block output pin. Connect to GND with a 1nF capacitor.

GND2

VCC2

C/N detection block reference

12

100

output pin. Connect to GND with a 1 µF

1.3k

40k

4k

GND2

capacitor.

13

14

15

16

17

18

19

CLAMP

OUT

SYNC IN

VIDEO

IN

VAMP

OUT

GND2

VCODR2

VCODR1

2.0 V

1.4 V

2.0 V

0 V

2.0 V

to

3.0 V

1.0 Vp-p

15

16

150

18 19

12k

46k

5k

20k

2k 2k

50

10k 10k

VCC1

GND1

VCC2

GND2

VCC2

GND2

Clamp block video output pin.

13

Clamp block sync input pin.

14

Clamp block video input pin.

Video amplifier block video output pin.

GND pin.

PLL detection output pins.

—4—

CXA3018R

Pin No. DC AC

20 21

22

23

24

25

26

27

28

Symbol

GND3

VCOB1

VCOE1

VCOE2

VCOB2

SW A-IN

SW B-IN

SW C-IN

LPF-N

Typical pin voltage

0 V

1.4 V

0.7 V

1.4 V

—

4.5 V

28 29

Equivalent circuit Description

GND pin.

VCC1

24 23

25 26 27

3k

250 250

40k

50k

260

40k

260

3k

50k

20k

VCC1

2.5V

GND1

21 22

GND3

VCC1

VCO constant setting pins.

Switching amplifier and video amplifier mode setting pins.

Mixer constant setting pins.

29

30

31

32

33

LPF-P

AGC-LPF

2ndAGC

CONT

OPAmp

IN-P

OPAmp

IN-N

2.9 V to

3.0 V

1.0 V to

3.0 V

—

32

30k

31

150

100

30

45k

100

150

VCC1

GND1

VCC1

GND1

VCC1

33

GND1

AGC detection block filter pin. Connect to GND with a 0.01 µF capacitor.

AGC detection block gain adjustment pin.

AGC detection block 1st AGC input pins.

—5—

CXA3018R

No. DC AC

34

35

36

37

38

Symbol

OPAmp

OUT

2nd IF

AGC

MTRX-

AGC VCC1

IF1

Typical pin voltage

0.3 V or

3.5 V

2.0 V

to

3.0 V

2.0 V

to

3.5 V

5 V

38 39

Equivalent circuit Description

100

34

5k

100

GND1

VCC1

40k

AGC detection block 1st AGC digital output pin.

AGC detection block 2nd AGC analog output pin.

35 36

10k

GND1

AGC detection block MTRX-AGC analog output pin.

Positive power supply pin.

10p

400

5k

2.3V

AGC block IF input pins.

39

40

41

42

43

IF2

GND1

GCONT

DETOUT

BUFIN

0 V

2.0 V

to

4.0 V

2.45 V

200

mVp-p

41

150

42 43

100 200

12k 3k

200

VCC2

GND2

GND1

VCC2

2.7V

GND2

VCC2

GND pin.

Switching amplifier block gain adjustment pin.

Switching amplifier block video output pin.

BUFF video input pin.

44

BUFOUT

2.0 V

200

mVp-p

44

—6—

150

10k

43

BUFF video output pin.

GND2