CXA1702AR データシートの表示（PDF） - Sony Semiconductor

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CXA1702AR

4-channel REC/PB Amplifier for 8 mm VCR

Sony Semiconductor 

CXA1702AR

Pin

Symbol

No.

9

T2

Pin voltage

DC

AC

—

—

10 REFV Hi8:4.45V

Nor:3.6V

input

11 RFAGC

OUT

1.9V 400mVp-p

output

Equivalent circuit

Description

270

10

140

60k 15k

40µ

40µ

Test pin. Connect decoupling

capacitance between this pin and

GND.

EVR adjusting pin to decide the

adjustment range of middle tune

fo.

Input the following:

Hi8 : 4.45 V

Nor: 3.6 V

3.25V

Output pin for playback Y signal.

40µ

11

12 RFAGCTC 2.5V to

—

4.75V

input

(during

EVR ad-

justment)

13 RFAGC

IN

— 220mVp-p

input

14 DOCDET 2.55V

—

(when pin

is open)

2k

600µ

410µ

140

12

50µ

50µ 25µ 25µ

13p

13

140

50k

50µ

3.25V

26.5k

14

140

4.15V

50µ

42.5k

RFAGC time constant pin.

4700p

12

VCC

RFAGCTC 470k

RFAGC gain may be adjusted by

EVR. Increasing the input

voltage increases gain.

Input pin for playback Y signal.

Playback Y signal is separated

from playback video signal output

to Pin 17 (MTOUT), then input to

Pin 13 (RFAGCIN). Set input

signal bias in the range from 1 V

to 3.5 V. Connect to Vcc when

this pin is not in use.

Pin for deciding dropout detection

level. Connect decoupling

capacitance between this pin and

GND. For adjustment, input

voltage proportional to Pin 52

(VREG) output voltage.

Increasing the input voltage

increases the detection level.

—4—

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