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

V

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

2

V

max 11 V

12

max 16 mA

32

I

56

I

6

I

max Peak current 5 mA

33

I

max Peak current 10 mA

27

V

2

V

12

32

V

op 8 to 9.5 V

2

V

op 8 to 9.5 V

12

op 10 to 16 mA

32

–6 mA
–3 mA

9V
9V

13 mA

C

°

C

°

Allowable power dissipation, Pd max — W

Pd max — Ta

Ambient temperature, Ta —°C

No.5153-2/10

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

32

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

V

56

V

60
5H

5L

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

C

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

PL

∆f

∆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

S

59

max fS= 33.4 MHz 96 101 dBµ

11

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

O1

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

AF

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

0

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

U

No signal –2 –1 MHz

L

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

4

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

TH

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

:4V→0V

R

–6 –4 –2 dB

Continued on next page.

mV/kHz

kHz/mV

No.5153-3/10

LA7685J

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit

Sharp video tone
variable range

Video voltage gain
AC switch 9 V

Video voltage gain
AV switch 0 V

Contrast control center C

∆Sharp

GV

GV

CEN

Contrast control variable range ∆C

BR

Bright control

BR

CEN

BR

Frequency characteristics
D.L.ON

DC transmission amount R
Delay line delay amount

(one level)
Delay line delay amount

(two levels)

f

T

T

V0V

DC

DL1

DL2

[Chroma Block PAL/NTSC Common]
Color control color residue E

min Color VR: 0 V, contrast VR: 9 V 30 mVp-p

C

Color contrast variable range ∆C
Demodulation output DC

voltage
Demodulation output DC

difference voltage
Demodulation output

carrier leakage

APC pull-in range ∆F

Kill output V

V

C-Y

∆V

C-Y

Ecar No signal, killer off, color V

APC

KiOUT

[Chroma Block PAL]
Color control center E

ACC amplitude characteristics

CCEN

ACC
ACC

B/Rp 1.10 1.35 1.60

Demodulation output ratio

G/Rp B-Y no signal –0.56 –0.51 –0.46

G/Bp R-Y no signal –0.21 –0.19 –0.17
Demodulation angle RBp 85 90 95 deg
Maximum chroma output Ech Color V
Maximum demodulation output E
Killer operating point E

max Color VR: 9 V, contrast VR: 9 V 3.6 4.2 Vp-p

C
KONP

PAL output 0.3 V
[Chroma Block NTSC]
Color control center E

ACC amplitude characteristics

ACC phase characteristics
Tint center T

CEN

ACC
ACC
ACC
ACC

CEN

Tint variable range ∆T

Demodulation output ratio

Demodulation angle
Maximum demodulation output E

Kill operation point E
NTSC/SECAM output E

R/B

G/B

RB
GB

maxNColor VR: 9 V, contrast VR: 9 V 3.5 4.1 Vp-p

C

KONN
KONN

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

:4V→9 V, contrast VR:6V

R

f = 100 kHz, 100 mVp-p, contrast

9V

V

: 9 V, video tone VR:4V

R

71013dB

15 18 21 dB

f = 100 kHz, 100 mVp-p, contrast

0V

V

:0V,

R

video tone V

R

:4V

15 18 21 dB

f = 100 kHz, 100 mVp-p, contrast VR: 6 V 0.35 0.44 0.53 Vp-p
Contrast VR:3V→9 V 22 24 26 dB

V

Bright VR: 2.0 V 5.5 6.5 7.5 V

H

Bright VR: 5.25 V 2.3 2.8 3.3 V
Bright VR: 7.5 V 0.5 1.5 V

L

Contrast VR: 6 V, video tone VR: 4 V, 3 dB down 4.5 6 MHz
Input : STAIR STEP signal, 200 mVp-p 88 93 %
Input : WHITE 100 % 300 350 400 ns

Input : WHITE 100 % 370 420 470 ns

Color VR: B-Y = 2.5 Vp-p, contrast VR:3V→9 V 18.5 20 21.5 dB

C

Burst signal only, color VR: 0 V 4.8 5.3 5.8 V

Burst signal only, color VR: 0 V –300 0 +300 mV

: 0 V 0.03 Vp-p

R

±500 Hz

Color VR: 4.5 V, contrast VR: 6 V 1.5 2.0 2.5 Vp-p
+6 dB –3 0 +3 dB

M1P

–20 dB –5 –1 +1 dB

M2P

: 9 V, contrast VR: 9 V 1.5 2.0 2.5 Vp-p

R

–37 –33 –29 dB

Color VR: 4.5 V, contrast VR: 6 V 1.4 1.9 2.4 Vp-p
+6 dB –3 0 +3 dB

M1N

–20 dB –3 0 +3 dB

M2N

+6 dB –3 0 +3 deg

P1N

–20 dB –7 0 +7 deg

P2N

Tint VR= 4.5 V, color VR: 4.5 V, contrast VR: 6 V –12 0 +12 deg
Tint V

:0V←4.5 V → 9V,

R

color V

N

N
N
N

: 4.5 V, contrast VR:6V

R

±35 deg

0.82 0.91 0.99

0.18 0.25 0.32
99 105 111 deg

–130 –120 –110 deg

–39 –35 –31 dB

1.4 1.9 2.4 V

Continued on next page.

0.35 V

No.5153-4/10

LA7685J

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit
[Deflection Block]
Sync separation input voltage V

Vertical free-running frequency

Vertical sync maximum period

Vertical sync minimum period
Vertical blanking pulse peak

value
Vertical blanking pulse width
Vertical output pulse width P

Vertical output voltage

Vertical external trigger load
resistance

Vertical automatic sync stop
voltage

Vertical output pulse start V
voltage

CC

Horizontal free-running
frequency deviation

Dependence of horizontal
free-running frequency on V

CC

Horizontal pull-in range f
Horizontal output pulse start

V

voltage

CC

AFC II FBP peak value FBP

SDC

T

free

V

T

free

V

T

max

V

T

max

V

T

min

V

T

min

V

V

HVBL

P

WBLK50

P

WBLK60

WVOUT

V

OUT H

V

OUT M

V

OUT L

R

TR

V

SAS

S

VV

∆f

∆f

HVCC

HPULL

S

HV

50
60

Horizontal sync signal only 356.5 357 357.5 H

50

Horizontal sync signal only 296.5 297 297.5 H

60
50
60

Deviaton from 15.680 kHz –100 0 +100 Hz

H

V25 = 6.5 V, reference value 2 Hz
Deviation from 15.680 kHz ±450 Hz

H

VCR switch input voltage VCR 0.7 0.9 V
Horizontal output pulse width P

Horizontal output pulse phase

Burst gate pulse width P
Burst gate pulse phase Td
Horizontal sync detection

threshold level
50/60 output voltage

50/60 input voltage
X ray protection circuit operation

input voltage
Sandcastle H.BLK peak value V
Sandcastle BGP peak value V
Sandcastle BP peak value V
Sandcastle BGP width P
Sandcastle BGP phase Td
Sandcastle field ID width P
Sandcastle H.BLK width 50 P
Sandcastle H.BLK width 60 P

WHOUT

H

PF

H

PCEN

H

PR

WBGP

BGP

Hcoin 4.2 4.5 4.8 V

V

50

V

60

Vin

50

Vin

60

V

HD

H SHBL
H SBGP

H SBP

W SBGP

SBGP

W SFID
W SHBL50
W SHBL60

6.0 6.3 6.6 V

312.0 312.5 313.0 H

262.0 262.5 263.0 H

268.5 269 269.5 H

224.5 225 225.5 H

7.0 7.5 V

21.0 21.5 22.0 H

17.0 17.5 18.0 H

8.0 8.5 9.0 H

5.7 6 6.3 V

4.3 4.6 4.9 V

0.3 V

2.5 3.6 kΩ

1.2 1.4 1.6 V

4V

4.8 5.5 V

4.1 4.6 5.1 V

21.8 23.8 25.8 µs
12 µs

3.4 4.4 5.4 µs
0µs

2.7 3.7 4.7 µs

0.2 0.6 1.2 µs

0.5 0.7 V

4.0 4.7 V

0.5 V

7.2 V

0.64 0.74 0.84 V

3.7 4.0 4.3 V

7.7 8.0 8.3 V

5.7 6.0 6.3 V

1.4 1.9 2.4 µs

1.7 2.2 2.7 µs

11.5 12 12.5 H

11.0 12.0 13.0 µs

10.0 11.0 12.0 µs

Continued on next page.

No.5153-5/10

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit
[OSD Block]
Blanking pulse threshold level TH
–Y OUT DC voltage

(OSD mode)

R.G.B. –IN threshold level

R.G.B. –Y OUT DC voltage
(3 V)

R.G.B. –Y OUT DC voltage
(4 V)

R.G.B. –Y OUT DC voltage
(5 V)

TH

V

V
V

V
V

V

V

TH

BL

-Y

R3V
G3V

B3V
R4V
G4V

B4V
R5V
G5V

B5V

LA7685J

C-IN : color bar, B-IN : variable 0.6 0.9 1.2 V
B-IN : 1.5 V 2.4 2.7 3.0 V
R-IN : variable, B-IN : 1.5 V

R

G-IN : variable, B-IN : 1.5 V

G

B-IN : variable

B

R,G,B-IN:3V 5.2 5.5 5.8 VV

R,G,B-IN:4V 5.8 6.1 6.4 VV

R,G,B-IN:5V 6.3 6.6 6.9 VV

1.4 1.7 2.0 VTH

No.5153-6/10

Block Diagram

LA7685J

No.5153-7/10

Sample Application Circuit

LA7685J

No.5153-8/10

LA7685J

LA7685J and LA7640N Connection Diagram (Reference)

Unit (resistance: Ω, capacitance: F)

No.5153-9/10

LA7685J

Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.

Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.

This catalog provides information as of June, 1995. Specifications and information herein are subject to
change without notice.

PS No.5153-10/10