Sanyo LA7685J Specifications

Ordering number: EN 5153

Monolithic Linear IC

LA7685J

PAL/NTSC Single-chip Color Television

Signal Processing Circuit

Overview

The LA7685J is a single-chip IC (with VIF, SIF, video, chroma, and deflection circuits built in) for use in PAL or NTSC television sets. Because the PLL+ splitting method is used in the VIF circuit, the LA7685J is suited for use in top-of-the-line small and mid-size television sets. In addition, when used in combination with the LA7640N SECAM chroma IC, the LA7685J can be used in a PAL/NTSC/SECAM multisystem set.

Features

[VIF Block]

PLL+ splitting (for excellent image and sound quality)

High-gain VIF amplifier

High-speed AGC

APC time constant switch built in

[SIF Block]

Simultaneous audio IN/OUT

Video/audio simultaneous muting, or audio only muting also possible

1st amplifier with AGC function

[AV Switching Block]

INT/EXT AV switch

[Video Block]

Black extension

DC restoration

Delay line built in

Wide band: 9 MHz (with delay line shorted)

Built-in double differential circuits that also enable soft tone

Supports S input (for VCRs)

DC transmission amount can be varied (externally adjustable)

[Deflection Block]

Adjustment-free horizontal and vertical sync

Excellent anti-noise characteristics due to adoption of duplex AFC

Vertical sync sensitivity can be adjusted externally

Constant vertical size with no signal (constant for 60/50 Hz)

Highly stable image during copy guard tape playback (macrovision tapes, etc.)

Excellent stability against VCR skew distortion

Package Dimensions

unit : mm

3071-DIP64S

Delay line Video EXT, audio EXT Switch conditions

OFF IN D OFF EXT C

ON EXT B ON IN A

[OSD Block]

Three RGB inputs

RGB linear amplifier (–6 dB input: 2 V to 5 V)

First blanking (also used for B input)

[Chroma Block]

ACC filter, carrier filter built in

Ident detection output

Killer detection output

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

[LA7685J]

3364

57.2

0.95 0.48 1.78 1.01

321

SANYO : DIP64S

63095HA(II) No.5153-1/10

19.05

4.00.51min

16.8

5.0max

3.2

0.25

LA7685J

Specifications

Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit

max 11 V

Maximum supply voltage

Maximum supply current I Allowable power dissipation Pd max Ta % 60°C 1.53 W Operating temperature Topr –10 to +65 Storage temperature Tstg –55 to +150

Circuit current

FBP input current

Operating Conditions atTa=25°C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage

Recommended supply current I

Operating supply voltage range

Operating supply current range I

max 11 V

max 16 mA

max Peak current 5 mA

max Peak current 10 mA

op 8 to 9.5 V

op 10 to 16 mA

–6 mA –3 mA

9V 9V

13 mA

Allowable power dissipation, Pd max — W

Pd max — Ta

Ambient temperature, Ta —°C

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LA7685J

Electrical Characteristics atTa=25°C, VCC=V2=V12=9V,ICC=I32=13mA

Parameter Symbol Conditions min typ max Unit [Circuit Voltage, Current] Horizontal supply voltage V Supply current I

2+12

[VIF Block] fp = 38.9 MHz Video output voltage

with no signal AFT output voltage

with no signal Maximum RF AGC voltage V Minimum RF AGC voltage V

60 5H

Input sensitivity Vi AGC range GR Maximum input (V

Maximum allowable input Vi max Video output is +1 dB. VIF input level 97 104 dBµ Video output amplitude V

O56

Differential gain DG Vi = 80 dBµ, 87.5 %, VIDEO MOD 3.0 10 % Differential phase DP Vi = 80 dBµ, 87.5 %, VIDEO MOD 1.0 10 deg

Video S/N S/N Sync signal tip level V

Frequency characteristics f

1.07 kHz beat level I Maximum AFT output voltage V Minimum AFT output voltage V

56 TIP

1.07 60H

60L

AFT detection sensitivity Sf CW = 80 dBµ, frequency change 50 80 110 AFT defeat start voltage V Black noise threshold level V APC pull-in range (U) f APC pull-in range (L) f

VCO maximum variable range

AFT SW

BTH PU

∆f

VCO control sensitivity β No signal 1.3 2.5 5.3 [AVSW Block] Image output DC voltage V Internal image input voltage V External image input voltage V

50 54 52

External audio input voltage V [1st SIF Block]

5.5 MHz conversion gain VG Vi = 70 dBµ, 33.4 MHz 21 26 31 dB Output level V Maximum input level V [SIF ATT Block] f

5.5 MHz

max fS= 33.4 MHz 96 101 dBµ

SIF limiting voltage Vi lim SIF input when detection output is –3 dB. 40 47 dBµ FM detection output voltage V

FM dectection output distortion THD Vi = 100 dBµ, ∆f = ±30 kHz 0.4 1.0 % AM rejection ratio AMR Vi = 100 dBµ, ATT voltage gain G

Maximum attenuation of electronic volume control

ATT Vi=2Vrms, f = 400 Hz 70 80 dB

[Video Block] Black extension threshold BS Maximum black extension gain BSmax APL variable, input 0.5 Vp-p –30 –22 –13 IRE

Soft video tone varlable range ∆Soft

VCC=9V,ICC= 13 mA 7.1 7.6 8.1 V VCC=9V,ICC= 13 mA, IFAGC=4V 102 120 138 mA

No signal 4.3 4.7 5.1 V

No signal 3.0 4.5 6.0 V CW = 85 dBµ, RF AGC VR = min 7.6 8.0 8.3 V

CW = 85 dBµ, RF AGC VR = max 0 0.01 0.3 V Video output is 0.8 Vp-p (40 % MOD), VIF input

level

= 0.8 Vp-p) – Input sensitivity 54 62 dB

33 39 45 dBµ

Vi = 80 dBµ, AM = 78 % MOD 1.7 2.0 2.3 Vp-p

Vi = 80 dBµ, 20 log

1.46 (Vp-p)

Noise (Vrms)

47 54 dB

CW = 80 dBµ 2.1 2.4 2.7 V Frequency when video output is –3 dB 6.5 8.0 MHz V4.43 MHz/V1.07 MHz, Vi = 80 dBµ 35 50 dB CW = 80 dBµ, frequency change 7.6 8.0 8.4 V CW = 80 dBµ, frequency change 0.6 1.0 1.4 V

Measure with sweep signal 0.5 1.0 V Measure with sweep signal 1.1 1.4 1.7 V CW = 80 dBµ, fp = 34 MHz to 44 MHz 0.8 1.7 MHz CW = 80 dBµ, fp = 53 MHZ to 64 MHz –2 –1 MHz No signal 0.9 1.7 MHz

No signal –2 –1 MHz

No signal 3.0 3.4 3.8 V No signal 4.4 4.8 5.2 V No signal 4.4 4.8 5.2 V No signal 5.2 5.6 6.0 V

Vi = 10 mV, 33.4 MHz 210 320 480 mVp-p

Vi = 100 dBµ, ∆f = ± 30kHz 390 500 630 mVrms

FM : ∆f = ±30 kHz

AM:30%

40 60 dB

Vi=1Vrms, f = 400 Hz –1 0 1 dB

APL variable, input 0.5 Vp-p 40 50 60 IRE

f = 2 MHz, 100 mVp-p Video tone V

:4V→0V

–6 –4 –2 dB

Continued on next page.

mV/kHz

kHz/mV

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