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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.
RF AGC DELAY AFT OUT 1 2 3 20 EQ F/B 19 APC FILTER 18 VIDEO OUT
PIN CONFIGURATION (TOP VIEW)
FEATURES
RF AGC OUT VIF IN VIF IN GND QIF DET IN IF AGC FILTER NFB
M52761SP/FP
* * * *
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. 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.
4 5 6 7 8 9
17 Vreg. OUT 16 VCO COIL 15 VCO COIL 14 Vcc 13 QIF OUT 12 IF AGC FILTER 11 LIMITER IN
AUDIO OUT 10
* * *
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
APC FILTER Vreg. OUT VCO COIL VIDEO OUT VCO COIL 19 18 17 16 15 QIF OUT LIMITER IN IF AGC FILTER 13 12 11
EQ F/B 20
Vcc 14 Vcc REG
VCO AFT
Inter
Split
LIM AMP
QIF DET EQ AMP VIDEO DET QIF AGC APC QIF AMP FM DET RF AGC VIF AMP IF AGC AF AMP
1
2
3
4
5 VIF IN
6 GND
7
8
9
10 AUDIO OUT
RF AGC DELAY RF AGC OUT AFT OUT VIF IN
QIF DET IN NFB IF AGC FILTER
1
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC ABSOLUTE MAXIMUM RATINGS (Ta=25C, unless otherwise noted)
Symbol VCC Vreg. OUT Pd Topr Tstg Surge Parameter Supply voltage1 Supply voltage Vreg. OUT Power dissipation Operating temperature Storage temperature Surge voltage resistance Ratings 10.5 6 1225 -20 to +85 -40 to +150 200 Unit V V mW C C V surge protection capacitance 200pF resistance 0 Note VCC and Vreg. out is not connected to each other VCC and Vreg. out is not connected to each other
ELECTRICAL CHARACTERISTICS (VCC=9V, Ta=25C, unless otherwise noted)
Symbol Parameter Test circuit Test point Input point Input SG Measurement condition switches set to position 1 unless otherwise indicated SW17=2 SW14=2 SW18=2, V8=0V Limits Min. Typ. Max. Unit
VIF section V17 Vreg voltage Circuit current ICC1 V18 Vo det
Video S/N
1 1 1 1 1 1 1 1
-
TP17 - A VIF IN TP18A TP18A TP18B TP18A TP18A - VIF IN VIF IN VIF IN VIF IN
- SG1 - SG1 SG2 SG3 SG4 SG5
-
4.7 31 3.4 1.8 49 7.0 - 101 50 2.6 4.4 2.2 8.0 - 89 0.9 1.7 3.1 0 20 7.7 - 35 - - 0.85 0.7 -
5.0 46 3.7 2.1 53 9.0 48 105 57 2.9 4.8 2.4 8.9 0.2 92 1.7 2.4 4.1 +20 30 8.1 0.7 40 2 2 1.15 1.2 5
5.3 61 4.1 2.5 - - 52 - - 3.2 - 2.6 - 0.7 95 - - - +40 60 - 1.2 - 5 5 1.45 1.65 10
V mA V V P-P dB MHz dB dB dB V V V V V dB MHz MHz MHz kHz mV/kHz V V dB % deg V k pF
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 Maximum RF AGC voltage Minimum RF AGC voltage RF AGC Operation voltage 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 Sync. tip level VIF input resister VIF input capacitance
BW VIN MIN VIN MAX GR V8 V8H V8L V3H V3L V3 CL-U CL-L CL-T VCO f V2H V2L IM DG DP V18 SYNC RINV CINV
SW18=2 SW8=2, V8=variable
TP18A VIF IN
- -
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2
2
TP8 TP8 TP8 TP3 TP3 TP3
VIF IN
-
SG6
-
VIF IN VIF IN VIF IN VIF IN
SG7 SG6 SG7 SG8 SG9 SG9 - SG2 SG10 SG10 SG10 SG11 SG12 SG12 SG2 - -
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 TP18A VIF IN 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 SIF section QIF1 QIF2 Vos QIF detection output amplitude 1 QIF detection output amplitude 2 1 1 1 1 1 1 1 1 1 2 2 1 VIF IN SG2 QIF IN SG13 VIF IN SG2 TP13 QIF IN SG14 TP13 TP13 VIF IN SG15 TP10 TP10 TP10 TP10 TP10 TP10 TP7 TP7 TP7 SIF IN SIF IN SIF IN SIF IN SIF IN SIF IN - - - SG19 SG16 SG16 SG17 SG18 SG19 - - - SW7=2, V7=0V SW8=2, V8=0V SW8=2, V8=0V SW8=2, V8=0V SW8=2, V8=0V SW8=2, V8=0V SW8=2, V8=0V 94 94 94 1.7 400 - - 55 55 0.9 - - 100 100 100 2.3 560 0.2 42 62 62 1.5 4 0.7 106 106 106 2.9 800 0.9 55 - - 2.1 8 1.0 dB dB dB V mVrms % dB dB dB k pF V Parameter Test circuit Test point Input point Input SG Measurement condition switches set to position 1 unless otherwise indicated Limits Min. Typ. Max. Unit
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
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 r.m.s at TP18B through a 5MHz (-3dB) L.P.F. 0.7xVo det NOISE VIN MIN Input sensitivity Input SG4 (Vi=90dB) 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. S/N=20 log (dB) VIN MAX Maximum allowable input 1. Input SG5 (Vi=90dB) 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 CC, as shown below.
TP3 Voltage -3dB V3H
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
1/2VCC
1MHz
BW
( f2 - f0 ) V3L Vi Vi (dB)
3
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, V2H Maximum AFT voltage, V2L 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 2H and V2L, respectively.
TP2 Voltage
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) into SIF input, and measure the 400Hz component level of AF output TP10. 2. Input SG19 (Vi=90dB) 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.
(mVrms) 30dB
Audio Output when SG17 is input
Audio Output when SG19 is input
(dB)
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; AMR=20log VoAF (mVr.m.s) VAM (mVr.m.s) (dB)
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; S/N=20log VoAF (mVr.m.s) VN (mVr.m.s) (dB)
6V
CQIF QIF control Decrease the voltage of V7, and measure V7 when the DC voltage
V2H
of TP13 changes.
3V
V2L f (6) 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
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 DISSIPATION Pd (mW) 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 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. THERMAL DERATING (MAXIMUM RATING)
1750 1500 1250 1225 1000 750 500 250 0 -20
TYPICAL CHARACTERISTICS
637
INPUT SIGNAL
SG No. 1 2 3 4 5 6 7 8 9 10 11 Signals (50 termination) f0=58.75MHz AM20kHz 77.8% 90dB f0=58.75MHz 90dB CW f0=58.75MHz 90dB CW (Mixed signal) f2=Frequency variable 70dB CW (Mixed signal) f0=58.75MHz AM20kHz 77.8% level variable f0=58.75MHz AM20kHz 14.0% level variable f0=58.75MHz 80dB CW f0=58.75MHz 110dB CW f0=58.75MHz CW level variable f0=Variable AM20kHz 77.8% 90dB f0=Variable 90dB CW f1=58.75MHz 90dB CW (Mixed signal) f2=55.17MHz 80dB CW (Mixed signal) f3=54.25MHz 80dB CW (Mixed signal) f0=58.75MHz 87.5% TM modulation ten-step waveform sync tip level 90dB f1=54.25MHz 95dB CW f1=54.25MHz 75dB CW f1=58.75MHz 90dB CW (Mixed signal) f2=54.25MHz 70dB CW (Mixed signal) f0=4.5MHz 90dB FM400Hz25kHz dev f0=4.5MHz level variable FM400Hz25kHz dev f0=4.5MHz 90dB AM400Hz 30% f0=4.5MHz 90dB CW
0
25
50
75
100
125
150
AMBIENT TEMPERATURE Ta (C)
12 13 14 15 16 17 18 19
5
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC APPLICATION EXAMPLE 1
SW14 TP18B L TP18A P F SW18 1 62 0.47 82p 20 19 18 390k 17 16 15 14 Vcc REG VCO AFT QIF DET EQ AMP VIDEO DET QIF AGC APC QIF AMP FM DET RF AGC VIF AMP IF AGC AF AMP Inter Split LIM AMP 13 12 2 1k VCO COIL 33 5549 TP13 TP12 2 1 A VCC
SW17 TP17
2
1 SIF IN
51
11
1 30k 20k TP1
2
3 TP3 15k
4 1:1
5
6
7 TP7
8 TP8
9 2.4k 10 SW8 1
10 7.5k TP10
SW7 0.47 1 2 V7 2 V8 51 VIF IN
VCC 150k TP2 150k
51
All capacitor is 0.01F, unless otherwise specified. The Measuring Circuit 1 is Mitsubishi standard evaluation fixture.
Units Resistance : Capacitance : F
6
MITSUBISHI ICs (TV)
M52761SP/FP
PLL-SPLIT VIF/SIF IC APPLICATION EXAMPLE 2
20
19
18
17
16
15
14 Vcc REG
13
12
11
VCO AFT
Inter
Split
LIM AMP
QIF DET EQ AMP VIDEO DET QIF AGC APC QIF AMP FM DET RF AGC VIF AMP IF AGC AF AMP
1
2
3
4 TP4
5
6
7 TP7
8
9
10
HI RX meter LO
HI RX meter LO
All capacitor is 0.01F, unless otherwise specified.
7

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