MITSUBISHI M52761FP

MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
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
1
20 EQ F/B
AFT OUT
2
19 APC FILTER
RF AGC OUT
3
18 VIDEO OUT
Video detection output is 2VP-P. It has built-in EQ AMP.
The video detector uses PLL for full synchronous detection
circuit. It produces excellent characteristics of DG, DP, 920kHz
beat, and cross color.
VIF IN
4
VIF IN
5
GND
6
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.
QIF DET IN
7
IF AGC FILTER
8
13 QIF OUT
NFB
9
12 IF AGC FILTER
FEATURES
•
•
•
•
•
•
•
M52761SP/FP
RF AGC DELAY
limiter, FM detector, QIF AGC and EQ AMP.
AUDIO OUT 10
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.
17 Vreg. OUT
16 VCO COIL
15 VCO COIL
14 Vcc
11 LIMITER IN
Outline 20P4B (SP)
20P2N-A (FP)
APPLICATION
TV sets, VCR tuners
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
EQ F/B
20
APC FILTER
Vreg. OUT
VCO COIL
VIDEO OUT
VCO COIL
19
18
17
15
16
QIF OUT
LIMITER IN
IF AGC FILTER
Vcc
13
14
12
11
Vcc REG
VCO
Inter
LIM AMP
Split
AFT
QIF DET
EQ
AMP
VIDEO
DET
QIF AGC
APC
QIF AMP
FM DET
RF AGC
IF AGC
VIF AMP
1
2
3
4
RF AGC DELAY
RF AGC OUT
AFT OUT
VIF IN
1
5
6
VIF IN
GND
7
8
AF AMP
9
QIF DET IN
NFB
IF AGC FILTER
10
AUDIO OUT
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise noted)
Symbol
Parameter
VCC
Supply voltage1
Vreg.
OUT
Supply voltage Vreg. OUT
Pd
Topr
Tstg
Power dissipation
Operating temperature
Storage temperature
Surge
Surge voltage resistance
Ratings
Unit
10.5
V
6
V
1225
-20 to +85
-40 to +150
mW
°C
°C
±200
V
Note
VCC and Vreg. out is not connected to
each other
VCC and Vreg. out is not connected to
each other
surge protection capacitance
200pF resistance 0Ω
ELECTRICAL CHARACTERISTICS (VCC=9V, Ta=25°C, unless otherwise noted)
Symbol
Parameter
VIF section
V17
Vreg voltage
Circuit current
ICC1
V18
Vo det
Video S/N
BW
VIN MIN
VIN MAX
GR
V8
V8H
V8L
Video output DC
Voltage
Video output voltage
Video S/N
Video band width
Input sensitivity
Maximum allowable
input
AGC control range Input
IF AGC voltage
Maximum IF AGC
voltage
Minimum IF AGC
voltage
Test
circuit
1
1
Test
point
Input
point
Input
SG
TP17
−
A
VIF IN
−
SG1
Measurement condition
switches set to position 1
unless otherwise indicated
Limits
Unit
Min.
Typ.
Max.
SW17=2
SW14=2
4.7
31
5.0
46
5.3
61
V
mA
SW18=2, V8=0V
3.4
3.7
4.1
V
SW18=2
SW8=2, V8=variable
1.8
49
7.0
−
2.1
53
9.0
48
2.5
−
−
52
V P-P
dB
MHz
dBµ
1
TP18A
−
−
1
1
1
1
TP18A
TP18B
TP18A
TP18A
VIF IN
VIF IN
VIF IN
VIF IN
SG1
SG2
SG3
SG4
1
TP18A VIF IN
SG5
101
105
−
dBµ
−
−
−
−
1
TP8
VIF IN
SG6
50
2.6
57
2.9
−
3.2
dB
V
1
TP8
−
−
4.4
4.8
−
V
1
TP8
VIF IN
SG7
2.2
2.4
2.6
V
V3H
Maximum RF AGC
voltage
1
TP3
VIF IN
SG6
8.0
8.9
−
V
V3L
Minimum RF AGC
voltage
1
TP3
VIF IN
SG7
−
0.2
0.7
V
V3
RF AGC Operation
voltage
1
TP3
VIF IN
SG8
89
92
95
dBµ
Capture range U
Capture range L
Capture range T
VCO SW ON Drift
AFT sensitivity
AFT maximum voltage
AFT minimum voltage
Inter modulation
Differential gain
Differential phase
1
1
1
1
1
1
1
1
1
1
TP18A VIF IN
TP18A VIF IN
−
−
TP18A VIF IN
TP2 VIF IN
TP2 VIF IN
TP2 VIF IN
TP18A VIF IN
TP18A VIF IN
TP18A VIF IN
SG9
SG9
−
SG2
SG10
SG10
SG10
SG11
SG12
SG12
0.9
1.7
3.1
±0
20
7.7
−
35
−
−
1.7
2.4
4.1
+20
30
8.1
0.7
40
2
2
−
−
−
+40
60
−
1.2
−
5
5
MHz
MHz
MHz
kHz
mV/kHz
V
V
dB
%
deg
Sync. tip level
1
TP18A VIF IN
SG2
0.85
1.15
1.45
V
VIF input resister
VIF input capacitance
2
0.7
−
1.2
5
1.65
10
kΩ
pF
CL-U
CL-L
CL-T
VCO ∆f
µ
V2H
V2L
IM
DG
DP
V18
SYNC
RINV
CINV
2
TP4
TP4
−
−
−
−
SW8=2, V8=0V
SW8=2, V8=variable
2
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
ELECTRICAL CHARACTERISTICS (cont.)
Symbol
Parameter
Test
circuit
Test
point
Input
point
Input
SG
Measurement condition
switches set to position 1
unless otherwise indicated
Limits
Unit
Min.
Typ.
Max.
94
100
106
dBµ
94
100
106
dBµ
SIF section
QIF1
QIF detection output
amplitude 1
1
QIF2
QIF detection output
amplitude 2
1
SIF detection output
amplitude
V1
AF output DC voltage
VoAF1
AF output
THD AF1 AF output distortion
LIM1
Limiting sensitivity
AMR1
AM rejection
AF S/N 1 AF S/N
RINS
SIF input resister
CINS
SIF input capacitance
Control section
QIF control
CQIF
Vos
VIF IN SG2
QIF IN SG13
VIF IN SG2
TP13
QIF IN SG14
TP13
1
TP13 VIF IN SG15
SW7=2, V7=0V
94
100
106
dB µ
1
1
1
1
1
1
2
2
TP10
TP10
TP10
TP10
TP10
TP10
TP7
TP7
SIF IN
SIF IN
SIF IN
SIF IN
SIF IN
SIF IN
−
−
SG19
SG16
SG16
SG17
SG18
SG19
−
−
SW8=2, V8=0V
SW8=2, V8=0V
SW8=2, V8=0V
SW8=2, V8=0V
SW8=2, V8=0V
SW8=2, V8=0V
1.7
400
−
−
55
55
0.9
−
2.3
560
0.2
42
62
62
1.5
4
2.9
800
0.9
55
−
−
2.1
8
V
mVrms
%
dBµ
dB
dB
kΩ
pF
1
TP7
−
−
−
0.7
1.0
V
SW7=2, V7=variable
ELECTRICAL CHARACTERISTICS TEST METHOD
Video S/N
Input SG2 into VIF IN and measure the video out (Pin 18) noise in
VIN MIN Input sensitivity
Input SG4 (Vi=90dBµ) into VIF IN, and then gradually reduce Vi
r.m.s at TP18B through a 5MHz (-3dB) L.P.F.
and measure the input level when the 20kHz component of EQ
output TP18A reaches -3dB from Vo det level.
S/N=20 log
0.7×Vo det
NOISE
(dB)
VIN MAX Maximum allowable input
1. Input SG5 (Vi=90dBµ) into VIF IN, and measure the level of the
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
20kHz component of EQ output.
2. Gradually increase the Vi of SG and measure the input level
when the output reaches -3dB.
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)
GR AGC Control range
GR=VIN MAX-VIN MIN (dB)
component level reaches -3dB from the 1MHz component level
as shown below.
V3 RF AGC operating voltage
Input SG8 into VIF IN and gradually reduce Vi and then measure
TP18
the input level when RF AGC output TP3 reaches 1/2 V CC, as
shown below.
TP3
Voltage
-3dB
V3H
1/2VCC
1MHz
BW
( f2 - f0 )
V3L
Vi
3
Vi (dBµ)
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.
IM Intermodulation
1. Input SG11 into VIF IN, and measure EQ output TP18A with an
oscilloscope.
2. Decrease the frequency of SG9 and measure the frequency fU
when the VCO locks.
2. Adjust AGC filter voltage V8 so that the minimum DC level of the
output waveform is 1.0V.
CL-U=fU-58.75 (MHz)
3. At this time, measure TP18A with a spectrum analyzer .
The intermodulation is defined as a difference between 0.92MHz
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.
and 3.58MHz frequency components.
LIM Limiting sensitivity
1. Input SG17 (Vi=90dBµ) into SIF input, and measure the 400Hz
component level of AF output TP10.
2. Input SG19 (Vi=90dBµ) into SIF input, and measure the 400Hz
CL-L=58.75-fL (MHz)
component level of AF output TP10.
3. Measure the input level of SG17 and SG19 when a ratio of the
CL-T Capture range
CL-T=CL-U+CL-L (MHz)
two VoAF level is 30dB. This input level is named V IN MIN.
VCO ∆f VCO SW on drift
1. Input SG2 into VIF IN .
Audio Output when
SG17 is input
(mVrms)
30dB
2. Turn on SW14 (Vcc), and adjust VCO coil so that AFT OUT
voltage TP2 equal 1/2 Vcc in 10 seconds.
Audio Output when
SG19 is input
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
(dBµ)
(f1), and one minutes after (f2).
VCO ∆f (kHz) =f2 (MHz) -f1 (MHz)
µ AFT sensitivity, V2H Maximum AFT voltage, V2L Minimum AFT
voltage
1. Input SG10 into VIF IN , and set the frequency of SG10 so that
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;
the voltage of AFT output TP19 is 6V. This frequency is named f
AMR=20log
(6).
VoAF (mVr.m.s)
VAM (mVr.m.s)
(dB)
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 2H and
V2L, respectively.
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;
TP2
Voltage
S/N=20log
6V
VoAF (mVr.m.s)
VN (mVr.m.s)
(dB)
CQIF QIF control
Decrease the voltage of V7, and measure V7 when the DC voltage
V2H
of TP13 changes.
3V
V2L
f (6)
µ=
f (3)
f (MHz)
1000 (mV)
(mV/kHz)
f (3) - f (6) (kHz)
4
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
THE NOTE IN THE SYSTEM SETUP
TYPICAL CHARACTERISTICS
M52761FP has 2 power supply pins of Vcc (pin 14) and Vreg.OUT
(pin 17) .
THERMAL DERATING (MAXIMUM RATING)
Pin 14 is for AFT output, RF AGC output circuits and 5V regulated
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 VCC and Vreg.Out is opened. The other
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
both VCC and Vreg.OUT.
INPUT SIGNAL
SG No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
5
Signals (50Ω termination)
f0=58.75MHz AM20kHz 77.8% 90dBµ
f0=58.75MHz 90dBµ CW
f0=58.75MHz 90dBµ CW (Mixed signal)
f2=Frequency variable 70dBµ CW (Mixed signal)
f0=58.75MHz AM20kHz 77.8% level variable
f0=58.75MHz AM20kHz 14.0% level variable
f0=58.75MHz 80dBµ CW
f0=58.75MHz 110dBµ CW
f0=58.75MHz CW level variable
f0=Variable AM20kHz 77.8% 90dBµ
f0=Variable 90dBµ CW
f1=58.75MHz 90dBµ CW (Mixed signal)
f2=55.17MHz 80dBµ CW (Mixed signal)
f3=54.25MHz 80dBµ CW (Mixed signal)
f0=58.75MHz 87.5%
TM modulation ten-step waveform
sync tip level 90dBµ
f1=54.25MHz 95dBµ CW
f1=54.25MHz 75dBµ CW
f1=58.75MHz 90dBµ CW (Mixed signal)
f2=54.25MHz 70dBµ CW (Mixed signal)
f0=4.5MHz 90dBµ FM400Hz±25kHz dev
f0=4.5MHz level variable FM400Hz±25kHz dev
f0=4.5MHz 90dBµ AM400Hz 30%
f0=4.5MHz 90dBµ CW
POWER DISSIPATION Pd (mW)
power supply circuit and Pin 17 is for the other circuit blocks.
1750
1500
1250
1225
1000
750
637
500
250
0
-20
0
25
50
75
100
125
AMBIENT TEMPERATURE Ta (°C)
150
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
APPLICATION EXAMPLE 1
SW14
TP18B
SW17
L
TP18A P
F
2
1
VCC
A
2
1
TP17
SW18
SIF IN
1
2
62
VCO COIL
33µ
5549
1k
51
0.47µ
TP13
82p
19
20
TP12
390k
17
18
15
16
13
14
11
12
Vcc REG
VCO
Inter
LIM AMP
Split
AFT
QIF DET
EQ
AMP
VIDEO
DET
QIF AGC
APC
QIF AMP
FM DET
RF AGC
IF AGC
VIF AMP
2
1
30k
4
3
TP3
TP1
5
6
8
7
SW7 0.47µ
20k
1
VCC
51
10
9
TP8
TP7
1:1
15k
AF AMP
2.4k
10µ
7.5k
TP10
2
V7
2
SW8
1
V8
150k
51
TP2
150k
VIF IN
∗ All capacitor is 0.01µF, unless otherwise specified.
∗ The Measuring Circuit 1 is Mitsubishi standard evaluation fixture.
Units Resistance : Ω
Capacitance : F
6
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC
APPLICATION EXAMPLE 2
20
19
18
17
15
16
13
14
12
11
Vcc REG
VCO
Inter
LIM AMP
Split
AFT
QIF DET
EQ
AMP
VIDEO
DET
QIF AGC
APC
QIF AMP
FM DET
RF AGC
IF AGC
VIF AMP
1
2
3
4
5
8
7
TP7
HI RX
meter
LO
HI RX
meter
LO
∗ All capacitor is 0.01µF, unless otherwise specified.
7
6
TP4
AF AMP
9
10