Datasheet M52761SP, M52761FP Datasheet (Mitsubishi)

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)

30dB

(dB

µ)

(mVrms)

Audio Output when

Audio Output when

SG17 is input

SG19 is input

AMR=20log

VoAF (mVr.m.s)

VAM (mVr.m.s)

(dB)

4

µ

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

.

CL-U Capture range

1. Increase the frequency of SG9 until the VCO is out of locked­oscillation.

2. Decrease the frequency of SG9 and measure the frequency fU
when the VCO locks.

CL-U=fU-58.75 (MHz)

CL-L Capture range

1. Decrease the frequency of SG9 until the VCO is out of locked­oscillation.

2. Increase the frequency of SG9 and measure the frequency fL
when the VCO locks.

CL-L=58.75-fL (MHz)

CL-T Capture range

CL-T=CL-U+CL-L (MHz)

VCO ∆ f VCO SW on drift

1. Input SG2 into VIF IN .

2. Turn on SW14 (Vcc), and adjust VCO coil so that AFT OUT
voltage TP2 equal 1/2 Vcc in 10 seconds.

3. Put VIF IN input in a non-input state and ground AGC filter at
TP8.

4. Measure the VCO free-run frequency 10 seconds after SW ON
(f1), and one minutes after (f2).

VCO ∆ f (kHz) =f2 (MHz) -f1 (MHz)

AFT sensitivity, V

2H

Maximum AFT voltage, V

2L

Minimum AFT

voltage

1. Input SG10 into VIF IN , and set the frequency of SG10 so that
the voltage of AFT output TP19 is 6V. This frequency is named f
(6).

2. Set the frequency of SG10 so that the AFT output voltage is 3V.
This frequency is named f (3)

3. IN the graph, maximum and minimum DC voltage are V
V

, respectively.

2L

TP2
Voltage

6V

V2H

3V

2H

and

IM Intermodulation

1. Input SG11 into VIF IN, and measure EQ output TP18A with an
oscilloscope.

2. Adjust AGC filter voltage V8 so that the minimum DC level of the
output waveform is 1.0V.

3. At this time, measure TP18A with a spectrum analyzer .
The intermodulation is defined as a difference between 0.92MHz
and 3.58MHz frequency components.

LIM Limiting sensitivity

1. Input SG17 (Vi=90dB µ ) into SIF input, and measure the 400Hz
component level of AF output TP10.

2. Input SG19 (Vi=90dB µ ) into SIF input, and measure the 400Hz
component level of AF output TP10.

3. Measure the input level of SG17 and SG19 when a ratio of the
two VoAF level is 30dB. This input level is named V

IN MIN

AMR AM rejection

1. Input SG18 into SIF input, and measure the output level of AF
output TP10. This level is named VAM.

2. AMR is;

AF S/N

1. Input SG19 into SIF input, and measure the output noise level of
AF output TP10. This level is named VN.

2. S/N is;

C

QIF

QIF control

S/N=20log

VoAF (mVr.m.s)

VN (mVr.m.s)

(dB)

Decrease the voltage of V7, and measure V7 when the DC voltage
of TP13 changes.

f (6) f (3) f (MHz)

1000 (mV)

µ =

f (3) - f (6) (kHz)

(mV/kHz)

V2L

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

THE NOTE IN THE SYSTEM SETUP

M52761FP has 2 power supply pins of Vcc (pin 14) and Vreg.OUT
(pin 17) .
Pin 14 is for AFT output, RF AGC output circuits and 5V regulated
power supply circuit and Pin 17 is for the other circuit blocks.
In case M52761FP is used together with other ICs like VIF
operating at more than 5V, the same supply voltage as that of
connected ICs is applied to V
circuit blocks, connected to Vreg.OUT are powered by internal 5V
regulated power supply.
In case the connecting ICs are operated at 5V, 5V is supplied to

CC and Vreg.OUT.

both V

CC and Vreg.Out is opened. The other

INPUT SIGNAL

SG No. Signals (50Ω termination)

1f0=58.75MHz AM20kHz 77.8% 90dBµ
2f0=58.75MHz 90dBµ CW

0=58.75MHz 90dBµ CW (Mixed signal)

f

3

f2=Frequency variable 70dBµ CW (Mixed signal)
4f0=58.75MHz AM20kHz 77.8% level variable
5f0=58.75MHz AM20kHz 14.0% level variable
6f0=58.75MHz 80dBµ CW
7f0=58.75MHz 110dBµ CW
8f0=58.75MHz CW level variable
9f0=Variable AM20kHz 77.8% 90dBµ

10 f0=Variable 90dBµ CW

f1=58.75MHz 90dBµ CW (Mixed signal)

11

f2=55.17MHz 80dBµ CW (Mixed signal)

f3=54.25MHz 80dBµ CW (Mixed signal)

f0=58.75MHz 87.5%

12

TM modulation ten-step waveform

sync tip level 90dBµ

13 f1=54.25MHz 95dBµ CW
14 f1=54.25MHz 75dBµ CW

1=58.75MHz 90dBµ CW (Mixed signal)

f

15

f2=54.25MHz 70dBµ CW (Mixed signal)

16 f0=4.5MHz 90dBµ FM400Hz±25kHz dev
17 f0=4.5MHz level variable FM400Hz±25kHz dev
18 f0=4.5MHz 90dBµ AM400Hz 30%
19 f0=4.5MHz 90dBµ CW

TYPICAL CHARACTERISTICS

THERMAL DERATING (MAXIMUM RATING)

1750

1500

1250
1225
1000

750

500

250

POWER DISSIPATION Pd (mW)

0

0 25 50 75 100 125

AMBIENT TEMPERATURE Ta (°C)

637

150-20

5

APPLICATION EXAMPLE 1

0.47µ

TP18A

SW18

62

TP18B

L
P
F

12

82p

1k

390k

TP17

33µ

SW17

VCO COIL

2

1

5549

SW14

1

2

TP13

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

A

SIF IN

TP12

V

CC

51

30k

20k

TP2

20

1

TP1

150k

150k

19

AFT

2

15k

18

EQ
AMP

3

CC

V

17 16 14

VIDEO
DET

VIF AMP

45 97

TP3

1:1

51

VIF IN

15

VCO

APC

RF AGC

68

51

Vcc REG

TP7

SW7

12

QIF DET

QIF AMP

IF AGC

0.47µ

V7

V8

SplitInter

QIF AGC

TP8

12

SW8

12

10µ

1113

LIM AMP

FM DET

AF AMP

10

7.5k2.4k
TP10

∗ All capacitor is 0.01µF, unless otherwise specified.
∗ The Measuring Circuit 1 is Mitsubishi standard evaluation fixture.

Units Resistance : Ω

Capacitance : F

6

APPLICATION EXAMPLE 2

MITSUBISHI ICs (TV)

M52761SP/FP

PLL-SPLIT VIF/SIF IC

20

1

∗ All capacitor is 0.01µF, unless otherwise specified.

19

AFT

2

18

EQ
AMP

3

17 16 14

VIDEO
DET

VIF AMP

45 97

TP4

HI

RX

meter

LO

15

Vcc REG

VCO

APC

RF AGC

68

HI
LO

QIF DET

QIF AMP

IF AGC

TP7

RX

meter

SplitInter

QIF AGC

12

1113

LIM AMP

FM DET

AF AMP

10

7