Sony CXA2032Q Datasheet

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E95840-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 7V

•Operating temperature Topr –10 to +75 °C

• Storage temperature Tstg –65 to +150 °C

• Allowable power dissipation

PD 450 mW

Operating Condition

Supply voltage VCC 4.5 to 5.25 V

Description

The CXA2032Q is a bipolar IC designed as

recording/playback amplifiers for 8 mm VTRs.

Features

Recording system

• Supports EVR control for recording Y/low-band recording level

• Feedback damping circuit provided in the recording amplifier

Playback system

• Feedback damping circuit provided in the playback amplifier facilitates printed circuit board design

• RFAGC and dropout detection circuit

Applications

8 mm VTR

Structure

Bipolar silicon monolithic IC

2-channel REC/PB Amplifier for 8 mm VTR

32 pin QFP (Plastic)

CXA2032Q

—2—

CXA2032Q

Block Diagram and Pin Configuration

LOGIC

BUFF

AGCDET

DOCDET

1

7 6 5 4 3 28 1

9

10

11

12

13

14

16

15

17 18 19 20 21 22 23 24

25

26

27

28

29

30

31

32

RFAGCTC

RFAGCOUT

DOCDET

DOP

BOTH REC

RFSWP

RP PB

YLEVEL

RFAGCIN

VREG

PBRFOUT

V

CC

VOUT1

REC1IN

RECDUMP1

V

CC1

REC1OUT

PB1IN

GND1

PBDUMP1

PBDUMP2

GND2

PB2IN

REC2OUT

YIN

CLEVEL

CIN

GND

VOUT2

REC2IN

RECDUMP2

V

CC2

CXA2032Q

RFSW

1CH

6dB

2CH

15dB

REC1CH

40dB

HEAD

REC

2ND

40dB 15dB

REC2CH

HEAD

2ND

REC

YGCA

CGCA

RFA GC

—3—

CXA2032Q

Pin Description (VCC, VCC1ch, VCC2ch=4.75 V Ta=25 °C)

Pin No.

1

2

3

4

Symbol

YLEVEL

RP PB

RFSWP

BOTH REC

0 V

to

4.75 V input

H: 2.3 V

or more L: 0.6 V

or less

input

H: 2.3 V

or more L: 0.6 V

or less

input

H: 2.3 V

or more L: 0.6 V

or less

input

Description

EVR adjusting pin for Y signal level during recording. The control voltage is from 0 V to 4.75 V. Increasing the input voltage increases the Y signal level.

Input pin for REC/PB mode switching signal.

H: PB L: REC

Input pin for RFSWP signal.

Alternate recording/both channel recording switching pin.

H: Both channel recording L: Alternate recording

Equivalent circuit

Pin voltage

DC AC

—

79.5k 140

37µ

1

80k 140

10µ

1.4V

2

80k 140

10µ

1.4V

3

80k 140

10µ

1.4V

4

—4—

CXA2032Q

No.

5

6

7

8

Symbol

DOP

DOCDET

RFAGCOUT

RFAGCTC

Pin voltage

DC AC

H: 3.15 V

L: 0.0 V

output

2.6 V

(when pin

is open)

2.8 V

2.5 V

to

4.75 V input

(during

EVR

adjustment)

—

400mVp-p

output

—

Equivalent circuit

150

2.4k

3.1V

5

4.15V

50µ

140

26.3k

43.4k

6

600µ

100

40µ

410µ

7

50µ50µ25µ25µ

140

8

Description

Output pin for dropout detection signal. Goes High during dropout.

Pin for deciding dropout detection level. Connect decoupling capacitance between this pin and GND. For adjustment, input voltage proportional to Pin 10 (VREG) output voltage. Increasing the input voltage increases the detection level.

Output pin for playback Y signal.

RFAGC time constant pin.

RFAGC gain can be adjusted by EVR. Increasing the input voltage increases the gain.

VCC

4700P

8

470k

—5—

CXA2032Q

Pin No.

9

10

11

12

Symbol

RFAGCIN

VREG

PBRFOUT

VCC

Pin voltage

DC AC

—

4.15 V

2.0 V

4.75 V

220mVp-p

input

—

220mVp-p

(playback

Y signal

output)

—

Equivalent circuit

50k

50µ

14013P

3.25V

9

10

360µ

100

35µ

290µ

11

Description

Input pin for playback Y signal. Playback Y signal is separated from playback video signal output to Pin 11 (PBRFOUT), then input to Pin 9 (RFAGCIN).

Output pin for 4.15 V regulator. Connect decoupling capacitance between this pin and GND.

Output pin for playback video signal.

Power supply pin for main blocks excluding recording and head amplifiers.

—6—

CXA2032Q

No.

13

14

15

16

Symbol

VOUT1

REC1IN

RECDUMP1

VCC1

Pin voltage

DC AC

3.4 V

0.7 V

1.4 V

4.75 V

184mVp-p (recording

Y signal

output)

120 µAp-p

input

—

Equivalent circuit

150µ

100

400µ

13

100

300µ

100

14

7.5k

4.15V

15

Description

Recording video signal 1ch output pin. The signal obtained by mixing the recording Y, recording C, recording AFM and recording ATF signals is output.

Recording video signal 1ch REC AMP input pin. Pin 13 (VOUT1) output is V/I converted by external resistor, then input to Pin 14 (REC1IN).

Damping adjusting pin for 1ch recording amplifier. Damping is adjusted by attaching damping resistor between Pin 15 and GND. Decreasing the resistance value increases the damping.

Power supply pin for 1ch recording and head amplifiers.