Mitsubishi M52761SP, M52761FP Datasheet

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

DESCRIPTION

The M52761 is IF signal-processing IC for VCRs and TVs. It enable
the PLL detection system despite size as small as that of
conventional quasi-synchronous VIF/SIF detector, IF/RF AGC, SIF
limiter, FM detector, QIF AGC and EQ AMP.

FEATURES

Video detection output is 2V

•

The video detector uses PLL for full synchronous detection

•

circuit. It produces excellent characteristics of DG, DP, 920kHz
beat, and cross color.

•

Dynamic AGC realizes high speed response with double filter.

•

Video IF and sound IF signal processings are separated from
each other. VCO output is used to obtain intercarrier.

This PLL-SPLIT method and built-in QIF AGC provide good
sound sensitivity and reduces buzz.

•

As AFT output voltage uses the APC output voltage, VCO coil is
not used.

•

Audio FM demodulation uses PLL system, so it has wide
frequency range with no external parts and no adjustment.

This IC corresponds to only NTSC system.

•

. It has built-in EQ AMP.

P-P

APPLICATION

TV sets, VCR tuners

PIN CONFIGURATION (TOP VIEW)

RF AGC DELAY EQ F/B

AFT OUT

RF AGC OUT

QIF DET IN

IF AGC FILTER

AUDIO OUT

1
2
3
4

VIF IN
VIF IN

GND

NFB

Outline 20P4B (SP)

20

APC FILTER

19

VIDEO OUT

18

M52761SP/FP

17

Vreg. OUT

165

VCO COIL
VCO COIL

156

Vcc

147

QIF OUT

138

IF AGC FILTER

129
1110

LIMITER IN

20P2N-A (FP)

RECOMMENDED OPERATING CONDITION

In case of Vcc and Vreg. out short

Supply voltage range....................................................4.75 to 5.25V

Recommended supply voltage...................................................5.0V

In case of Vreg. out open

Supply voltage range......................................................8.5 to 12.5V

BLOCK DIAGRAM

18

EQ
AMP

Vreg. OUT LIMITER INAPC FILTER

17 16

VCO COIL Vcc

VIDEO
DET

EQ F/B IF AGC FILTER

20

VIDEO OUT

19

AFT

VCO COIL

VCO

APC

RF AGC

QIF OUT

15

14 12

Vcc REG

13

SplitInter

QIF DET

QIF AGC

QIF AMP

11

LIM AMP

FM DET

VIF AMP

1

RF AGC DELAY

1

2

AFT OUT AUDIO OUTIF AGC FILTER

3

RF AGC OUT

45

6 8

QIF DET IN

GNDVIF IN

IF AGC

AF AMP

97

NFBVIF IN

10

°

°

−

−

−

− dB µ

−

−

−

µ

−

−

−

−

−

±

−

−

−

−

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

ABSOLUTE MAXIMUM RATINGS

(Ta=25 ° C, unless otherwise noted)

Symbol Parameter Ratings Unit Note

and Vreg. out is not connected to

CC

V

CC

Vreg
OUT

P

d

T

opr

stg

T

Supply voltage1 10.5 V

.

Supply voltage Vreg. OUT 6 V
Power dissipation 1225 mW

Operating temperature -20 to +85
Storage temperature -40 to +150

Surge Surge voltage resistance

ELECTRICAL CHARACTERISTICS

Symbol Parameter

Test

circuit

200 V

(V

=9V , Ta=25 ° C, unless otherwise noted)

CC

Test

point

Input

point

Input

SG

Measurement condition Limits

switches set to position 1

unless otherwise indicated

V
each other

and Vreg. out is not connected to

CC

V
each other

C
C

surge protection capacitance
200pF resistance 0 Ω

Min. Typ. Max.

VIF section
V17 Vreg voltage 1 TP17 −−

CC1

I
V18

Circuit current 1 A VIF IN SG1 SW14=2 31 46 61 mA
Video output DC

Voltage

1 TP18A −−

SW17=2 4.7 5.0 5.3 V

SW18=2, V8=0V 3.4 3.7 4.1 V

Vo det Video output voltage 1 TP18A VIF IN SG1 1.8 2.1 2.5 V

Video S/N

Video S/N 1 TP18B VIF IN SG2 SW18=2 49 53
BW Video band width 1 TP18A VIF IN SG3 SW8=2, V8=variable 7.0 9.0
VIN MIN Input sensitivity 1 TP18A VIF IN SG4

VIN MAX
GR AGC control range Input

Maximum allowable

input

1 TP18A VIF IN SG5 101 105

−−−−

50 57

48 52 dB µ

V8 IF AGC voltage 1 TP8 VIF IN SG6 2.6 2.9 3.2 V
V8H

V8L

V3H

V3L

V3

Maximum IF AGC

voltage

Minimum IF AGC

voltage

Maximum RF AGC

voltage

Minimum RF AGC

voltage

RF AGC Operation

voltage

1 TP8

1 TP8 VIF IN SG7 2.2 2.4 2.6 V

1 TP3 VIF IN SG6 8.0 8.9

1 TP3 VIF IN SG7

1 TP3 VIF IN SG8 89 92 95 dB µ

−−

4.4 4.8

0.2 0.7 V

CL-U Capture range U 1 TP18A VIF IN SG9 0.9 1.7
CL-L Capture range L 1 TP18A VIF IN SG9 1.7 2.4

−

CL-T Capture range T 1

−−

VCO ∆ f VCO SW ON Drift 1 TP18A VIF IN SG2 SW8=2, V8=0V

3.1 4.1

± 0 +20 +40 kHz

AFT sensitivity 1 TP2 VIF IN SG10 20 30 60 mV/kHz
V2H AFT maximum voltage 1 TP2 VIF IN SG10 7.7 8.1
V2L AFT minimum voltage 1 TP2 VIF IN SG10

0.7 1.2 V
IM Inter modulation 1 TP18A VIF IN SG11 SW8=2, V8=variable 35 40
DG Differential gain 1 TP18A VIF IN SG12
DP Differential phase 1 TP18A VIF IN SG12
V18

SYNC

Sync. tip level 1 TP18A VIF IN SG2 0.85 1.15 1.45 V

RINV VIF input resister 2 TP4 −−
CINV VIF input capacitance

2

TP4 −− −

0.7 1.2 1.65 k Ω

2 5 %
2 5 deg

5 10 pF

Unit

P-P

dB

MHz

dB

V

V

MHz
MHz
MHz

V

dB

2

−

−

−

−

−

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

ELECTRICAL CHARACTERISTICS

Symbol Parameter

SIF section
QIF1

QIF2

Vos
V1 AF output DC voltage 1 TP10 SIF IN SG19 SW8=2, V8=0V 1.7 2.3 2.9 V

VoAF1 AF output 1 TP10 SIF IN SG16 SW8=2, V8=0V 400 560 800 mVrms
THD AF1 AF output distortion 1 TP10 SIF IN SG16 SW8=2, V8=0V
LIM1 Limiting sensitivity 1 TP10 SIF IN SG17 SW8=2, V8=0V
AMR1 AM rejection 1 TP10 SIF IN SG18 SW8=2, V8=0V 55 62
AF S/N 1 AF S/N 1 TP10 SIF IN SG19 SW8=2, V8=0V 55 62
RINS SIF input resister 2 TP7 −−
CINS SIF input capacitance 2 TP7 −− −
Control section

QIF

C

QIF detection output
amplitude 1

QIF detection output
amplitude 2

SIF detection output
amplitude

QIF control 1 TP7 −−

(cont.)

Test

Test

Input

circuit

point

1 TP13

1 TP13

1 TP13 VIF IN SG15 SW7=2, V7=0V 94 100 106 dB µ

VIF IN
QIF IN

VIF IN
QIF IN

point

Input

SG

SG2

SG13

SG2

SG14

Measurement condition Limits

switches set to position 1

unless otherwise indicated

SW7=2, V7=variable

Min. Typ. Max.

94 100 106 dB µ

94 100 106 dB µ

0.9 1.5 2.1 k Ω

0.2 0.9 %
42 55 dB µ

48pF

0.7 1.0 V

Unit

dB
dB

ELECTRICAL CHARACTERISTICS TEST METHOD

Video S/N

Input SG2 into VIF IN and measure the video out (Pin 18) noise in
r.m.s at TP18B through a 5MHz (-3dB) L.P.F.

S/N=20 log

BW Video band width

1. Measure the 1MHz component level of EQ output TP18A with a
spectrum analyzer when SG3 (f2=57.75MHz) is input into VIF
IN. At that time, measure the voltage at TP8 with SW8, set to
position 2, and then fix V8 at that voltage.

2. Reduce f2 and measure the value of (f2-f0) when the (f2-f0)
component level reaches -3dB from the 1MHz component level
as shown below.

TP18

-3dB

0.7×Vo det
NOISE

(dB)

VIN MIN Input sensitivity

Input SG4 (Vi=90dB µ ) into VIF IN, and then gradually reduce Vi
and measure the input level when the 20kHz component of EQ
output TP18A reaches -3dB from Vo det level.

VIN MAX Maximum allowable input

1. Input SG5 (Vi=90dB µ ) into VIF IN, and measure the level of the
20kHz component of EQ output.

2. Gradually increase the Vi of SG and measure the input level
when the output reaches -3dB.

GR AGC Control range

GR=VIN MAX-VIN MIN (dB)

V3 RF AGC operating voltage

Input SG8 into VIF IN and gradually reduce Vi and then measure
the input level when RF AGC output TP3 reaches 1/2 V
shown below.

TP3
Voltage

3H

V

CC

, as

1/2VCC

1MHz

3

BW

( f2 - f0 )

V

3L

Vi

Vi (dBµ)