Sony CXA2032Q Datasheet

—1—

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

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

Pin

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

Pin

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

300µ

100

14

7.5k

7.5k

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.