Sony CXA3218N Datasheet

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E98X25-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 –0.3 to 7.0 V

• Storage temperature Tstg –55 to +150 °C

• Allowable power dissipation

PD 1000 mW

Operating Conditions

• Supply voltage VCC 4.50 to 5.50 V

• Operating temperature Topr –35 to +85 °C

Description

The CXA3218N is the video signal demodulation IC for satellite broadcasting. This IC has most of the functions required for demodulation, and provides stable video detection in combination with the CXA3108Q (L-band down converter with PLL).

Features

• Built-in IF AGC

• Excellent DG/DP characteristics

• Keyed AFT input pin to support MUSE reception

• 1st AGC control output pin

• Single 5 V power supply operation

Applications

PAL/NTSC system BS tuners, etc.

Structure

Bipolar silicon monolithic IC

FM Demodulator for BS/CS

30P pin SSOP (Plastic)

CXA3218N

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CXA3218N

Block Diagram and Pin Configuration (Top View)

IFAGC

OPAOUT

OPAINN

OPAINP

AGCCNT

AGCLPF

LPFP

LPFN

OSCB2

OSCE2

OSCE1

OSCB1

OSCGND

VCODR1

VCODR2

MTRXAGC

V

CC

IF IN1

IF IN2

GND

OFFSET

DETOUT

VREG

GCONT

AFTDWN

AFTUP

ANA

KEYEDIN

SH2

SH1

MTRX

AGC

REG

DET AMP

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15

1AGC

2AGC

AGC

DET

161718192021222324252627282930

VCO

AFT

DCAMP

MIX

OFF SET

AGCAMP

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CXA3218N

Pin Description

Symbol

Typical pin

Equivalent circuit Description

No. voltage

1

2

3

4

5

6

7

8

MTRXAGC

VCC

IF IN1

IF IN2

GND

OFFSET

DETOUT

VREG

2.0 V to

3.5 V

5 V

0 V

2.0 V to

4.0 V

2.45 V

4.1 V

1

100

10k

40k

VCC

GND

2.3V

GND

3 4

10p

400

5k 5k

150

10k

VCC

GND

6

200

VCC

GND

7

VCC

GND

8

AGC detection block MTRX-AGC analog output.

Positive power supply.

AGC block IF input.

Ground.

AFT block offset adjustment.

DETAMP block video output.

Reference voltage output. Connect to GND with a 10 µF capacitor.

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CXA3218N

Symbol

Typical pin

Equivalent circuit Description

No. voltage

9

10

11

12

13

14

15

GCONT

AFTDWN

AFTUP

ANA

KEYEDIN

SH2

SH1

1.5 V to

4.0 V

4.9 V

or

0.1 V

2.4 V to

3.8 V

0.3 V

3.0 V to

3.5 V

150

15k

VCC

GND

9

3k

2.7V

30k

VCC

GND

10 11

200

47k

75k

VCC

GND

12

2k

200

2.5V

150

4k

30k

VCC

GND

13

200

2k

VCC

GND

14 15

2k

DETAMP block gain adjustment.

AFT block digital output.

AFT block filter. Connect to GND with a 10 µF capacitor.

AFT block keyed input.

AFT block sample-and-hold signal output. Connect to GND with a 0.1 µF capacitor.

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CXA3218N

Symbol

Typical pin

Equivalent circuit Description

No. voltage

16

17

18 19

20

21

22

23

24

25

26

VCODR2

VCODR1

OSCGND

OSCB1

OSCE1

OSCE2

OSCB2

LPFN

LPFP

AGCLPF

AGCCNT

2.0 V to

3.0 V

0 V

1.4 V

0.7 V

1.4 V

4.5 V

2.9 V to

3.0 V

1.5 V to

3.5 V

50

10k

50

VCC

GND

16 17

3k 3k

VCC

OSCGND

19 2021

22

250 250

20k

260 260

VCC

GND

23 24

30k 150

V

CC

GND

25

150

45k

VCC

GND

26

PLL detection output.

Ground.

VCO resonance circuit connect terminals.

PLL loop filter connect terminals.

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

AGC detection block gain adjustment.