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| NJM2536A RF Modulator for VHF Band DESCRIPTION The NJM2536A is a RF modulator IC especially designed for VHF band RF modulator and consists of video clamp circuit, white clip circuit, video AM modulator and audio FM modulator, built into one chip. NJM2536AV FEATURES * Operating Voltage 5V * Picture-to-sound ratio is adjustable * VHF Oscillator on chip * Carrier-off switch function on chip * Regulator on chip * Bipolar Technology * Package Outline:DMP/SSOP14 BLOCK DIAGRAM NJM2536AM PACKAGE OUTLINE REG OUT CH SW 14 13 12 11 10 9 RF OSC REGULATOR CLAMP & WHITE CLIP MIXER CARRIER OFF SW AUDIO FM MODULATOR 1 VIDEO IN 2 CARRIER OFF SW 3 ANT SW DRIVE 4 RF OUT 5 GND1 6 P/S AUDIO IN 4.5MHz TANK 8 7 GND2 CH2 VCC CH1 -1- NJM2536A ABSOLUTE MAXIMUM RATINGS Parameter Symbol Supply Voltage VCC Power Dissipation PD Input Voltage Operating Temperature Range Storage Temperature Range VI Topr Tstg (TA=25C) Unit V mW V C C (TA=25C) Unit V Ratings 7 300 -0.3 to VCC -20 to +75 -40 to +125 RECOMMENDED OPERATING VOLTAGE RANGE Parameter Condition Operating Voltage Symbol VCC Min. 4.5 Typ. 5.0 Max. 5.5 ELECTRICAL CHARACTERISTICS Parameter Condition Symbol No video/audio input signal, Operating Current ICC CARRIER OFF SW(Pin2)=5V ANT SW DRIVE CARRIER OFF SW(Pin2)=5V VANT1 Output Voltage -1 ID=26mA ANT SW DRIVE CARRIER OFF SW(Pin2)=Open VANT2 Output Voltage -2 VCC=2V Video Output Level VO Video input signal(Pin1)=0.5VPP (Note 1) Video Modulation Depth mp Video input signal(Pin1)=0.5VPP (Note 1) Video Limiter Modulation Video input signal(Pin1)=1.0VPP mpmax Depth (Note 1) Video input signal(Pin1)=0.5VPP Differential Gain DG Staircase Video input signal(Pin1)=0.5VPP DP Differential Phase Staircase Picture-to-sound Ratio PS Video input signal(Pin1)=0.5VPP (Note 1) Sound FM Modulation Deviation of fs per 100mV b Sensitivity Audio input signal(Pin7)=0.05VPP Audio Distortion THD 1kHz sine wave Audio Signal-to-noise Sound Modulation 60% ASN Ratio 1kHz sine wave Maximum Sound FM Audio input signal(Pin7)=1.0VPP msmax Modulation 1kHz sine wave Min. 13.5 3.7 0 (83) (70) (85) (11) - Typ. 16.0 4.0 0.065 86 76 94 3 3 13 0.51 0.3 60 700 (VCC=5V,TA=25C) Max. Unit 22.5 4.3 0.1 (89) (82) (98) (15) mA V V dBu % % % deg dB KHz/mV % dB % (Note 1) Because AC characteristics largely depends on application circuit, these parameters are specified by the DC characteristics as shown in next page. -2- NJM2536A DC ELECTRICAL CHARACTERISTICS (VCC=5V,Pin2=2.5V, TA=25C, otherwise noted. All measurements performed in the DC test circuit are shown in next page) Parameter Condition (Note 2) Symbol Min. Typ. Max. Unit Video Output Signal Gvv1=Gvvh1-Gvvl1 Gvv1 62.4 85 124.5 mV Amplitude 1 Video Output Signal Gvv2=Gvvh2-Gvvl2 Gvv2 62.4 85 124.5 mV Amplitude 2 Mp=((Gvv1-Mw)/Gvv1)x100 Video Modulation Depth Mp 70 76 82 % where Mw=Mwh-Mwl Video Limiter Modulation Mpmax=((Gvv1-Wc)/Gvv1)x100 Mpmax 85 94 98 % Depth (Note 2) where Wc=Wch-Wcl Picture-to-sound Ratio Ps=Psh-Psl Ps -70 -45 -35.1 mV (Note 2) Explanation of symbols * * * * * * * * * * * * * * Vv : VIDEO IN output voltage at Pin1 CH1 output voltage at Pin11 CH SW (Pin13) input = 2.5V V11h : V12h : CH1 output voltage at pin12 CH SW (Pin13) input = 0.5V Gvvh1: RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv, CH1 (Pin11) = V11h + 0.15V, CH SW (Pin13) input = 2.5V Gvvl1 : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv, CH1 (Pin11) = V11h - 0.15V, CH SW (Pin13) input = 2.5V Gvvh2 : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv, CH2 (Pin12) = V12h + 0.15V, CH SW (Pin13) input = 0.5V Gvvl2 : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv, CH2 (Pin12) = V12h - 0.15V, CH SW (Pin13) input = 0.5V Mwh : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv + 0.43V, CH1 (Pin11) = V11h + 0.15V, CH SW (Pin13) input = 2.5V Mwl : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv + 0.43V, CH1 (Pin11) = V11h - 0.15V, CH SW (Pin13) input = 2.5V Wch : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv + 0.8V, CH1 (Pin11) = V11h + 0.15V, CH SW (Pin13) input = 2.5V Wcl : RF OUT output voltage at Pin4 VIDEO IN (Pin 1) input = Vv + 0.8V, CH1 (Pin11) = V11h - 0.15V, CH SW (Pin13) input = 2.5V VPs : P/S output voltage at Pin6 CARRIER OFF SW (Pin 2) input = 2.5V Psh : RF OUT output voltage at Pin4 P/S (Pin 6) input = VPs + 0.2V, CH1 (Pin11) = 2.4V, CH SW (Pin13) input = 2.5V Psl : RF OUT output voltage at Pin4 P/S (Pin 6) input = VPs - 0.2V, CH1 (Pin11) = 2.4V, CH SW (Pin13) input = 2.5V -3- NJM2536A AC TEST CIRCUIT VCC OPEN CH1 CH2 1u + 10p 10p 68p 1n 1n + 1u 1n 14 VCC 13 CH SW 12 CH2 11 CH1 10 GND2 9 REG OUT 8 4.5MHz TANK 6p CARRIER OFF SW GND1 1 + 2 0.1u VCC 3 4 1n 5 6 AUDIO IN VIDEO IN ANT SW DRIVE RF OUT P/S 7 1u 75 VIDEO IN RF OUT AUDIO IN DC TEST CIRCUIT VCC VCC 68p + 1u 1n 1n + 1u 1n 1n 14 VCC 13 CH SW 12 CH2 11 CH1 10 GND2 9 REG OUT 8 4.5MHz TANK AUDIO IN CARRIER OFF SW VIDEO IN ANT SW DRIVE RF OUT GND1 1 2 VCC 3 4 5 P/S 6 7 0.01 -4- NJM2536A TERMINAL CHARACTERISTICS Typ. DC No. Symbol Voltage (V) Equivalent Circuit 15 Function 1 VIDEO IN 1.9 1 Video Signal Input 4 14 2 CARRIER OFF SW - 2 Picture Carrier-Off Switch 5 14 3 ANT SW DRIVE 4 (Pin2=High) 0 (Pin2=Low) 3 ANT Switch Drive Voltage Output 5 14 4 4 RF OUT 4 5 RF Signal Output 5 GND1 0 GND terminal except for oscillator circuit 6 6 P/S 2.8 5 Picture-to-sound Ratio Adjust -5- NJM2536A No. Symbol Typ. DC Voltage (V) Equivalent Circuit Function 14 7 AUDIO IN 0.035 Audio Signal Input 7 5 14 8 4.5MHz TANK 8 2.9 4.5MHz Tank Coil for Sound FM Modulation Circuit 5 14 9 REG OUT 4 9 Regulator Output 5 10 GND2 0 GND for Oscillator Circuit 11 CH1 2.24 (OSC:ON) 2.30 (OSC:OFF) 14 RF Oscillator Pin (Base) 11,12 12 CH2 2.24 (OSC:ON) 2.30 (OSC:OFF) 5 RF Oscillator Pin (Base) -6- NJM2536A No. Symbol Typ. DC Voltage (V) Equivalent Circuit 14 Function 13 CH SW 2.38 13 Output channel Select Switch 5 14 VCC 5 Power Supply -7- NJM2536A TYPICAL CHARACTERISTICS TA=25C ICC vs VCC 30 90 VIDEO OUTPUT LEVEL vs VCC 25 88 20 ICC [mA] Vo [dBu] 86 15 84 10 82 5 0 0.0 2.0 4.0 VCC [V] 6.0 8.0 10.0 80 4.0 4.5 5.0 5.5 VCC [V] 6.0 6.5 7.0 VIDEO MODULATION DEPTH vs VCC 82 0.70 0.65 80 0.60 78 mp [%] 0.55 0.50 0.45 0.40 72 0.35 0.30 4.0 AUDIO FM MODULATION SENSITIVITY vs VCC 76 74 70 Ab [KHz/mV] 4.5 5.0 5.5 VCC [V] 6.0 6.5 7.0 4.5 5.0 5.5 VCC [V] 6.0 6.5 7.0 -8- MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. |
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