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| NJM2519A RF Modulator for VHF Band DESCRIPTION The NJM2519A 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. FEATURES * Operating Voltage 5V * VHF Oscillator on chip * Regulator on chip * Bipolar Technology * Package Outline: DMP8 NJM2519AM PACKAGE OUTLINE BLOCK DIAGRAM REG OUT OSC 8 7 6 RF OSC REGULATOR AUDIO FM MODULATOR MIXER CLAMP & WHITE CLIP 1 RF OUT 2 GND 3 VIDEO IN 4.5MHz TANK AUDIO IN 5 4 VCC -1- NJM2519A 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 Operating Current No video/audio input signal, ICC 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. 11.5 (83) (70) (88) (13) - Typ. 15.3 86 76 94 3 3 16 0.51 0.3 60 700 (VCC=5V,TA=25C) Max. Unit 19.1 mA (89) (82) (98) (19) 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- NJM2519A DC ELECTRICAL CHARACTERISTICS (VCC=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=Gvvh-Gvvl Gvv 48 108 mV Amplitude 1 Mp=((Gvv-Mw)/Gvv)x100 Video Modulation Depth Mp 66 78 % where Mw=Mwh-Mwl Video Limiter Modulation Mpmax=((Gvv-Wc)/Gvv)x100 Mpmax 85 94 98 % Depth (Note 2) where Wc=Wch-Wcl Picture-to-sound Ratio Ps=20log(Gvv/(Gva/2)) Ps 8 18 dB (Note 2) Explanation of symbols * * * * * * * * * Vv : VIDEO IN output voltage at Pin3 Voso : OSC output voltage at Pin8 Gvvh : RF OUT output voltage at Pin1 OSC(Pin8) input = Voso+0.3V Gvvl : Mwh : RF OUT output voltage at Pin1 OSC(Pin8) input = Voso-0.3V RF OUT output voltage at Pin1 OSC (Pin 8) input = Voso+0.3V,VIDEO IN(Pin3) input=Vv + 0.41V Mwl : RF OUT output voltage at Pin1 OSC (Pin 8) input = Voso-0.3V,VIDEO IN(Pin3) input=Vv + 0.41V Wch : RF OUT output voltage at Pin1 OSC (Pin 8) input = Voso+0.3V,VIDEO IN(Pin3) input=Vv + 0.75V Wcl : RF OUT output voltage at Pin1 OSC (Pin 8) input = Voso-0.3V,VIDEO IN(Pin3) input=Vv + 0.75V Gva : RF OUT output level at Pin1(4.5MHz Sine wave [peak to peak]) OSC(Pin8) input = Voso+0.6V -3- NJM2519A AC TEST CIRCUIT 10p 0.1u VC AUDIO IN 1n 0.1u 0.1u 8 OSC 7 REG OUT 6 VCC 5 AUDIO IN 0.1u VIDEO IN RF OUT 1 1n 2 3 + 4.5MHz TANK GND 4 1n 75 68p RF OUT VIDEO IN VCC DC TEST CIRCUIT 1n 0.1u 0.1u 8 OSC 7 REG OUT 6 VCC 5 AUDIO IN 4.5MHz TANK 1 2 VIDEO IN RF OUT GND 3 4 1n 1n 68p -4- NJM2519A TERMINAL CHARACTERISTICS Typ.DC No. Symbol Voltage (V) Equivalent Circuit 6 Function 1 RF OUT 4 1 RF Signal Output 2 2 GND 6 GND 3 VIDEO IN 1.9 3 Video Signal Input 2 6 4 4.5MHz TANK 4 2.9 4.5MHz Tank Coil for Sound FM Modulation Circuit 2 6 5 AUDIO IN 0.035 5 2 Audio Signal Input 6 VCC - Power Supply -5- NJM2519A No. Symbol Typ.DC Voltage (V) Equivalent Circuit 6 Function 7 REG OUT 4 7 Regulator Output 2 6 8 OSC 2.2 8 RF Oscillator Pin 2 -6- NJM2519A TYPICAL CHARACTERISTICS TA=25C VCC vs ICC 30 25 20 15 10 5 0 0.0 2.0 4.0 VCC [ V ] 6.0 8.0 90 89 88 87 Vo [ dBuV ] 86 85 84 83 82 81 80 4.5 5.0 5.5 VCC [ V ] 6.0 6.5 7.0 VCC vs VIDEO OUTPUT LEVEL ICC [ mA ] USA3ch(61.25MHz) USA4ch(67.25MHz) VCC vs VIDEO MODULATION DEPTH 90 88 86 b [ kHz/mV ] 84 mp [ % ] 82 80 78 76 74 72 70 4.5 5.0 5.5 VCC [ V ] 6.0 6.5 7.0 USA3ch(61.25MHz) USA4ch(67.25MHz) VCC vs AUDIO FM SENSITIVITY 0.70 0.65 0.60 0.55 0.50 0.45 0.40 0.35 0.30 4.5 5.0 5.5 6.0 6.5 7.0 VCC [ V ] -7- 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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