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