LA72912V datasheet(7/12 Pages) SANYO

部件名	LA72912V

功能描述	FM Modulator and Demodulator IC

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制造商	SANYO [Sanyo Semicon Device]

网页	https://www.sanyo-av.com/us/

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LA72912V

No.A1409-7/12

Pin Function

Pin No.

Pin name

FM MOD mode(Outside camera)

FM DEMOD mode(Inside Monitor)

Note

1

Emphasis filter

Emphasis filter connection pin

Non connect(Hi-Z)

If you no need, this pin is open.

2

VCC5V

VCC for FM modulation.

VCC for FM demodulation.

3

FM/Video Output

FM Output

(RO=200Ω:1.8Vp-p)

Video Output

(RO=1kΩ: 2Vp-p)

Push-pull output

4

4V Regulator

FM modulate block and ASK bock

supply reference voltage.

FM demodulate block and ASK bock

supply reference voltage.

5

FM/VD input

VD Input.

(Hi: over 2V, Low: under 0.4V)

(VD DET: High)

FM Input.

(Recommend Level: 100 to 620mVp-p)

DEMOD mode: Set

3.3V by internal bias. (34k

Ω/66kΩ)

6

MOD/DEMOD Control

Set over 2V DC voltage.

Set under 0.4V DC voltage.

Outside camera /

Inside monitor setting.

7

TC1(MOD)/

FMAGC monitor

Out control

Set capacitor for TC1

FMAGC monitor out control

GND: Monitor ON / VCC: Monitor OFF

Can do second inside monitor

addition

8

TC2(DEMOD)/

FMAGC monitor

Output

Set capacitor for TC2

FMAGC monitor output

Can do second inside monitor

addition

9

ASK-VCC5V

VCC for ASK

←

10

ASK CAR IN

ASK carrier Input.

(Recommend below 3Vp-p)

←

2.1V by internal bias. (50k

Ω)

11

ASK DATA IN

ASK Data Input.

(Hi: more than 2V, Lo: below 0.4V)

←

12

ASK TX Output

ASK modulated signal Output

←

Push-pull output

13

ASK RX Output

ASK Demodulated Output

←

Open collector output

ASK carrier detect = Lo

14

ASK DET filter

ASK Detector filter

←

15

ASK AGC filter

/AGC OFF

AGC filter for ASK. (When AGC

operate voltage is 0V to 3V, AGC stop

when you add over 4.5V.)

←

16

ASK RX input

ASK Demodulate Input

←

3.3V by internal bias. (34k

Ω/66kΩ)

17

Standby control

FM blocks standby control. (FM block

operate: over 2V, FM block standby:

under 0.4V )

←

18

DOC-OUT

/2nd-Call input

2ND-Call input, 2ND-Call: Low (High:

over 2V, Low: under 0.4V)

DOC output

(When DO-DET, output is Low)

DEMOD mode:

Open collector output.

19

B-GND

Circuit GND

←

20

FM AGC filter

Emphasis monitor output

FM AGC control filter (AGC-ON:0

to

3V DC, AGC-OFF:4.5V

to 5V by

external DC voltage.)

MOD mode: Don’t connect

capacitor.

21

De-emphasis filter

Non connect(Hi-Z)

De-emphasis filter connection pin.

If you don’t need, this pin is open.

22

A-GND

Circuit GND

←

23

De-emphasis output

/V-2V select

DFF for V-diff control

(ON: over 2V, OFF: under 0.4V)

DE-emphasis output

MOD mode;

VD diff. Count select

0V : VD through

2V : VD 1/2 diff

24

Video input

Video signal input.

(from outside CCD camera: 1Vp-p).

Video signal input.

(from de-emphasis block: 0.5Vp-p).

MOD mode: Maximum video input

level is 1.5Vp-p.

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