LA70020 Ver la hoja de datos (PDF) - SANYO -> Panasonic

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componentes Descripción

Fabricante

LA70020

Recording/Playback Amplifier for VHS VCRs

SANYO -> Panasonic 

LA70020, 70020M

Continued from preceding page.

Parameter

HA playback threshold level

SW30 threshold level

Recording Mode

Symbol

Conditions

HAP-1

HAP-2

SW30-1

SW30-2

SP → EP : *1

EPSP

Lch → Hch : *1

Hch → Lch

min

1.7

0.0

1.2

0.0

Ratings

typ

Unit

max

5.0

V

1.3

V

5.0

V

0.8

V

Current drain

ICCR Current input at pin 13.

52

59

REC AGC AMP output level

Intermode gain difference

VRSP

VREP

∆GVR

Output level for VIN = 400 mVp-p and

f = 4 MHz.

VRSP/VREP

127

135

104

111

1.4

1.7

REC AGC AMP control characteristic

∆VAGC1-SP Output level divided by VRSP or VREP for

∆VAGC1-EP f = 4 MHz and VIN = 700 mVp-p.

∆VAGC2-SP Output level divided by VRSP or VREP for

∆VAGC2-EP f = 4 MHz and VIN = 100 mVp-p.

0.5

–1.0

–0.5

REC AGC AMP frequency characteristic

∆VFRS Ratio of f = 7 MHz output to f = 1 MHz output

∆VFRE for VIN = 400 mVp-p. *2

–1

0

∆VHDRS Ratio of the 8 MHz (secondary) component of

REC AGC AMP secondary primary distortion ∆VHDRE the output to its 4-MHz (primary) component

–45

for VIN = 400 mVp-p and f = 4 MHz.

REC AGC AMP maximum output level

∆VMOSP Output level, for f = 4 MHz, at which the

∆VMOEP secondary distortion is –35 dB.

20

22

REC AGC AMP muting attenuation

∆VMRS Output level divided by VRSP or VREP for

∆VMRE f = 4 MHz and VIN = 400 mVp-p.

–45

REC AGC AMP cross modulation relative level

∆VCYS

∆VCYE

Output ratio (4M +/ 629k)/4M for

VIN = 400 mVp-p and f = 4 MHz at T9A and

VIN = 2.4 Vp-p and f = 629 kHz at T10A.

–45

HA REC threshold level

HAR-1 SP → EP : *1

1.7

HAR-2 EP → SP

0.0

REC MUTE threshold level

MUTE-1 MUTE OFF → MUTE ON *1

1.2

MUTE-2 MUTE ON → MUTE OFF

3.2

REC PB threshold level

PB-REC PB → REC *1

1.2

REC-PB REC → PB

0.0

66 mA

143 mVp-p

119 mVp-p

2.0

dB

1.0

dB

dB

+1

dB

–40

dB

mApp

–40

dB

–40

dB

5.0

V

1.3

V

2.8

V

5.0

V

5.0

V

0.8

V

Notes:* Before measuring the items under Playback Mode, input a 0 to 5.0 V trigger pulse to T11 (H-SYNC), the pin from which the LA70020 takes its T9

(HA) control switch timing.

* The resistance between pins 19 and 20 must be accurate to within 1.0%.

*1. These are voltage application points.

*2. Apply a DC voltage of approximately 1.8 V to the AGC wave detector filter pin (pin 21) to fix the AGC amplifier gain.

*3. Apply a DC voltage to the REC-CUR-Adj pin (pin 18) and adjust the output level.

No. 5711-3/13

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