SANYO LA7191N Datasheet

Ordering number: EN 5471

Monolithic Linear IC

LA7191N

Global VHS-format VCR

Video Signal Processor

Overview

The LA7191N is a multi-format, single-chip video signal
processing IC that supports TV systems around the world.

Features

.

Compatible with TV systems around the world (NTSC/
PAL/MESECAM/4.43 -NTSC/PAL-M/PAL-N).

.

All filters on chip, except for PB-LPF for chroma (cutoff
frequency requires no adjustment).

.

No adjustment of YNR and DOC levels.

.

Double high-pass noise canceller on chip.

.

Linear phase-type picture control on chip.

.

fsc output can be used as clock for OSD IC.

.

DCC circuit on chip.

.

Pilot burst erasure circuit on chip.

.

High-speed AFC circuit on chip.

.

Switching noise canceller on chip.

.

Smallest package in the industry.

.

Few components needed.

.

2fsc output.

.

I/O pin for CNR insertion added.

.

YNR/LNC switching possible.

Package Dimensions

unit: mm

3025B-DIP42S

[LA7191N]

SANYO : DIP42S

Specifications

Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Allowable power dissipation Pd max Ta %65°C 1020 mW
Operating temperature Topr –10 to +65 °C
Storage temperature Tstg –40 to +150 °C

Operating Conditions at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operating supply voltage range V

max 7.0 V

CC

CC

op 4.8 to 5.5 V

CC

5.0 V

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

22896HA (II) No.5471 - 1/11

LA7191N

Operating Characteristics at Ta = 25°C, VCC= 5.0 V

Parameter Symbol Input

Output

Conditions min typ max Unit
[REC Mode Y]
Current drain REC I

CCR

When VCC= 5 V (when there is no signal),
measure sum of incoming current at pins 35

95 120 145 mA

and 28

AGC adjustment C

AGC

T37A VIN= 1.0 Vp-p video signal, use VR39 to

adjust T4 output to 0.5 Vp-p
VCA control characteristics VCA T37A T4 Measure T4 output level when S10 is set to 2 0.48 0.5 0.52 Vp-p
AGC adjustment voltage V

AGC

AGC detection voltage V
EE output level V
AGC Output 1 AGC 1 T37A T4 V

AGC Output 2 AGC 2 T37A T4 V

AGC Output 3 AGC 3 T37A T4 V

AGC Output 4 AGC 4 T37A T4 V

Sync separation output level V

Sync separation output

SYR

PW

pulse width
Sync separation output

∆ T

leading edge delay time
Sync separation threshold

TH

level

T37A T39 Measure T39 DC voltage in above state 3.2 3.4 3.6 V
T37A T38 Measure T38 DC voltage in same manner 1.2 1.4 1.6 V

AD

T37A T34A Measure T34A output level in same manner 0.95 1.00 1.05 Vp-p

EE

T37A T32 VIN= 1.0 Vp-p video signal,

= 2.0 Vp-p video signal

IN

Measure T4 output level

= 0.5 Vp-p video signal

IN

Measure T4 output level

= 700 mVp-p LUMI, 600 mVp-p SYNC

IN

Measure T4 SYNC level

= 700 mVp-p LUMI, 150 mVp-p SYNC

IN

Measure T4 SYNC level

500 540 560 mVp-p

470 490 500 mVp-p

135 150 165 mVp-p

70 85 100 mVp-p

4.0 4.2 4.4 Vp-p

Measure T32 output pulse wave high value

T37A T32 VIN= 1.0 Vp-p video signal,

SYR

T37A T32 VIN= 1.0 Vp-p video signal, measure delay

SYR

T37A T32 Gradually attenuate the input level, measure

SYR

Measure T32 output pulse width

time of output SYNC versus input SYNC

input level at point when output pulse width

4.4 4.7 5.0 µs

0.6 0.8 1.0 µs

–18 –14 dB

widens 1 µs or more beyond PWSYR
Sync tip level,

pedestal level,
white level measurement
(REC)

Pseudo V insertion level
(REC)

Pseudo H insertion level
(REC)

White insertion level (REC) ∆ WHR T37A T34 Measure T34 DC voltage when 1.3 V is

L

VOR

T37A T34 Measure electric potential for each of the T34

video output sync tip, pedestal, and white

peak, and assign the measured values to

L

SYN,LPED

, and L

, respectively

WHI

∆ VDR T37A T34 Measure T34 DC voltage when5Visapplied

to T33, and assign the measured value to

L

and calculate the difference with L

VDR

∆VDR=L

SYN–LVDR

SYN

∆ HDR T37A T34 Measure T34 DC voltage when 2.7 V is

applied to T33, and assign the measured

value to L

with L

PED

∆HDR=L

and calculate the difference

HDR

PED–LHDR

–80 0 +80 mV

–200 –100 0 mV

150 250 350 mV

applied to T33, and assign the measured

VCA detection voltage V
REC YNR operation

VR-YNR T37A T3 V

EP/LP
Y-LPF frequency

YLPF 1 T37A T3 V

characteristics

YLPF2 T37A T3 V

YLPF3 T37A T3 V

YLPF4 T37A T3 V

VCA

value to L

with L

WHI

∆WHR=L

T37A T9 Measure T9 DC voltage 3.1 3.4 3.7 V

= white 50% + CW

IN

(15.8 mVp-p) ratio between 32f

and 32.5f

= standard multiburst signal 1 Vp-p,

IN

2 MHz response to 500 kHz at T3

= standard multiburst signal 1 Vp-p,

IN

4.8 MHz response to 500 kHz at T3
= standard multiburst signal 1 Vp-p,

IN

2 MHz response to 500 kHz at T3, T22A: 5 V

= standard multiburst signal 1 Vp-p,

IN

4.8 MHz response to 500 kHz at T3, T22A:

and calculate the difference

WHR

WHI–LWHR

component

H

component

H

3.5 4.5 5.5 dB

0.2 0.7 1.2 dB

–4.5 –3.5 –2.5 dB

0.4 0.9 1.4 dB

–5.0 –4.0 –3.0 dB

5V.

FM modulator output level V

FM modulator secondary

H

distortion

FM

MOD

T40 No input, use VR42 to adjust output

frequency to 4 MHz, measure output level

T40 Ratio of 8 MHz component to 4 MHz in the

above state

0.8 1.0 1.2 Vp-p

–40 –35 dB

Continued on next page.

No. 5471 - 2/11

Continued from preceding page.

LA7191N

Parameter Symbol Input

FM modulator modulation
sensitivity

S

MOD

Output

Conditions min typ max Unit

T4 T40 Measure amplitude of change in output

frequency when 2.6 V DC or 3.1 V DC is
applied to T4, 2 x (f3.1 – f2.6)

FM modulator linearity L

1/2 f

carrier shift CS1 T40 Measure amplitude of change in output

H

MOD

T4 T40 Measure output frequency when 2.85 V DC

applied to T4,
L

f2.85 – (f3.1 + f2.6)/2

=

MOD

S

MOD

frequency when SW41B is off and SW41A is
switched from on to off

CS2 T40 Measure amplitude of change in output

frequency when SW41B is on and SW41A is
switched from on to off

Emphasis gain G

EMPH

T4A T5 VIN= 0.5 Vp-p 10 kHz sine wave

Measure ratio of levels of input and output
amplitude at T5

Detail enhancer
characteristics

Nonlinear emphasis
characteristics

Main linear emphasis
characteristics

White clipping level L

Dark clipping level L

Non-linear emphasis
characteristics SP

G

ENH1

T4A T5 VIN= 158 mVp-p 2 MHz sine wave

Measure ratio of levels of T5 and T4,
difference with G

G

ENH2

T4A T5 VIN= 50 mVp-p 2 MHz sine wave

Measure ratio of levels of T5 and T4,
difference with G

G

ENH3

T4A T5 VIN= 15.8 mVp-p 2 MHz sine wave

Measure ratio of levels of T5 and T4,
difference with G

G

ENH4

T4A T5 VIN= 15.8 mVp-p 2 MHz sine wave

Measure output amplitude at T5 in edit mode,
difference with G

G

NLEMP1

T4A T5 VIN= 500 mVp-p 2 MHz

Measure ratio of levels of T5 and T4,
difference with G

G

NLEMP2

T4A T5 VIN= 158 mVp-p 2 MHz

Measure ratio of levels of T5 and T4,
difference with G

G

NLEMP3

T4A T5 VIN= 50 mVp-p 2 MHz

Measure ratio of levels of T5 and T4,
difference with G

G

ME1

T4A T5 VIN= 50 mVp-p 200 kHz sine wave

Measure ratio of levels of T5 and T4,
difference with G

G

ME2

T4A T5 VIN= 50 mVp-p 2 MHz

Measure ratio of levels of T5 and T4,
difference with G

WC

DC

T4A T5 VIN= 500 mVp-p white 100% video signal

Measure white clipping level at T5

T4A T5 VIN= 500 mVp-p white 100% video signal

Measure dark clipping level at T5

NLE-SP T4A T5 Same as G

EMPH

EMPH

EMPH

EMPH

EMPH

EMPH

EMPH

EMPH

EMPH

NLEMP3

[PB Mode Y]
Current drain PB I

Dropout compensation
period

P Incoming current at pins 35 and 28 when

T

CC

DOC

T39A
T4A

V

= 5.0 V

CC

T34A T39A: 4 MHz, 300 mVp-p sine wave

T4A: 0.5Vp-p video signal
T34A: time from when input went to 0 until
T34A output returned, SW10 → 1

DOC loop gain GDOC T39A

T12 T39A: 4 MHz, 300 mVp-p sine wave

T4A

T4A: 0.5Vp-p video signal
T39A: Input/output response when 5H have
elapsed after input went to 0, SW10 → 3

FM demodulation voltage V

FM demodulation sensitivity S

DEM4

DEM

T39A T3 VIN=300 mVp-p,f=4MHz, Output DC

voltage

T39A T3 VIN= 300 mVp-p,f=2MHz, V

VIN= 300 mVp-p,f=6MHz, V
Calculate S

DEM

=(V

DEM6–VDEM2

x 100

DEM2
DEM6

)/4

1.6 2.0 2.4

MHz/V

–2 0 +2 %

6.8 7.8 9.5 kHz

6.8 7.8 9.5 kHz

–0.5 0 +0.5 dB

0.9 1.4 1.9 dB

2.2 3.2 4.2 dB

4.0 5.0 6.0 dB

1.8 2.8 3.8 dB

0.5 1.4 2.3 dB

2.6 3.8 5.2 dB

4.9 6.4 7.9 dB

4.9 5.2 5.5 dB

13.1 13.6 14.1 dB

186 193 200 %

–60 –55 –50 %

3.0 4.0 5.0 dB

125 155 185 mA

0.35 0.5 0.65 ms

–1.0 0 +1.0 dB

1.5 2.0 2.5 V

0.36 0.45 0.54

V/MHz

Continued on next page.

No. 5471 - 3/11

Continued from preceding page.

LA7191N

Parameter Symbol Input

FM demodulation linearity L

DEM

Carrier leak CL T39A T3 V

PB YNR characteristics

GP-YNR T4A T28A V

LP/EP
PB LNC characteristics

GP-LNC T4A T28A V

SP
Playback through gain G

PB

L

DEM

Output

V

DEM4

=

–(V

DEM6+VDEM2

V

DEM6–VDEM2

= 300 mVp-p,f=4MHz

IN

Ratio between 4 MHz component of T3 and
S

DEM

= white 50% + CW (15.8 mVp-p)

IN

Ratio between 32f
component

= white 50% + CW (15.8 mVp-p)

IN

Ratio between 32f
component

Conditions min typ max Unit

)/2

x 100

component and 32.5f

H

component and 32.5f

H

T4A T34A Apply VIN= 0.5 Vp-p video signal to pin 4,

and determine ratio between T34A output
level and input level

Nonlinear de-emphasis
characteristics

GNL

DEEM1

T4A T34A VIN= white 50% + CW

(f = 1 MHz, 158 mVp-p)
measure input/output response, difference
with GPB

Noise canceller
characteristics

PIC-CTL center response
characteristics

PIC-CTL hard response
characteristics

PIC-CTL soft response
characteristics

Nonlinear de-emphasis
characteristics SP

Sync tip level,
pedestal level,
white level measurement
(PB)

Pseudo V insertion level
(PB)

Pseudo H insertion level
(PB)

GNL

DEEM2

G

WNC1

G

WNC2

G

WNC3

G

PC

G

PH

G

PS

NLDE-SP T4A T34A Same as GNL

L

VOR

∆ VDP T4A T34 Measure pin 34 DC voltage when5Vis

∆ HDP T4A T34 Measure pin 34 DC voltage when 2.7 V is

T4A T34A f = 1 MHz, 50 mVp-p –5.0 –4.0 –3.0 dB
T4A T34A f = 1.5 MHz, 158 mVp-p –1.3 –0.8 –0.3 dB
T4A T34A f = 1.5 MHz, 50 mVp-p –4.5 –3.5 –2.5 dB
T4A T34A f = 1.5 MHz, 15.8 mVp-p –10.5 –9.0 –7.5 dB
T4A T34A f = 2 MHz, 158 mVp-p 1.2 1.7 2.2 dB

T4A T34A f = 2 MHz, 158 mVp-p 7.0 8.0 10.0 dB

T4A T34A f = 2 MHz, 158 mVp-p –10.0 –8.0 –7.0 dB

DEEM2

T4A T34 With VIN= white 100% and T34A at 1.0

Vp-p, measure electric potential for each of
the pin 34 video output sync tip, pedestal,
and white peak, and assign the measured
values to L

SYN,LPED

, and L

, respectively

WHI

applied to pin 33, and assign the measured
value to L

with L
∆ VDP = L

, and calculate the difference

VDP

SYN

SYN–LVDP

applied to pin 33, and assign the measured
value to L
with L

∆HDP = L

, and calculate the difference

HDP

PED

PED–LHDP

White insertion level (PB) ∆WHP T4A T34 Measure pin 34 DC voltage when 1.3 V is

applied to pin 33, and assign the measured

Sync separation output level V

Sync separation output

PW

pulse width
Sync separation output

∆ T

leading edge delay time

4.2 V regulator operation
check

V

SYP

SYP

SYP

REG

value to L
with L
∆WHP = L

T4A T32 VIN= 0.5 Vp-p video signal, pin 32 output

pulse wave high value

T4A T32 VIN= 0.5 Vp-p video signal, T32 output pulse

width

T4A T32 VIN= 0.5 Vp-p video signal, measure delay

time of output SYNC versus input SYNC

T30 Measure DC level of T30 in REC mode 3.95 4.15 4.35 VDC

, and calculate the difference

WHP

WHI

WHI–LWHP

[REC Mode Chroma]
REC chroma low-band

conversion output level
Burst emphasis amount

(NTSC mode)

V

OR-15

T37A T15A VIN= standard color bar signal (1 Vp-p),

measure burst level at T15A

GBE T37A T15A VIN= standard color bar signal (1 Vp-p)

Ratio of burst level at T15A when S41A is off
(SP/EP) and on (LP)

–3.5 0 +3.5 %

–40 –35 dB

–11 –9 –7 dB

H

–7.0 –5.5 –4.0 dB

H

4.0 5.5 7.0 dB

–2.8 –1.8 –0.8 dB

–5.0 –4.0 –3.0 dB

–80 0 +80 mV

–300 –200 –100 mV

20 120 220 mV

4.0 4.2 4.4 Vp-p

4.4 4.7 5.0 µs

0.9 1.1 1.3 µs

120 160 200

5.5 6.0 6.5 dB

mVp-p

Continued on next page.

No. 5471 - 4/11