NJW1502 RF Modulator with TSG for UHF Band DESCRIPTION The NJＷ1502 is a RF modulator IC especially designed for UHF PACKAGE OUTLINE band RF modulator and consists of video clamp circuit, white clip circuit, video AM modulator, audio FM modulator and Test Signal Generator(TSG) , built into one chip. NJW1502M FEATURES • Operating Voltage 5V • Picture-to-sound ratio is adjustable • TSG on chip • Regulator on chip • Bi-CMOS Technology • Package Outline: DMP16 VCC R F OUT TSG RF GND OSC VCC OSC 2 OSC 1 OSC GND BLOCK DIAGRAM 16 15 14 13 12 11 10 9 RF M IX ER RF O SCI LLATOR T SG RE G ULATOR V ID EO C LAM P F M MOD ULATOR 1 2 3 4 5 6 7 8 P/S adj . TAN K SW AU D IO I N R EG O UT TAN K 1 TAN K 2 G ND VID EO IN W H IT EC LI P -1- NJW1502 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Supply Voltage VCC Power Dissipation PD Input Voltage Operating Temperature Range Storage Temperature Range VI Topr Tstg Ratings 7 300 (TA=25°C) Unit V mW -0.3 to VCC -20 to +75 -40 to +125 RECOMMENDED OPERATING VOLTAGE RANGE Parameter Condition Operating Voltage Symbol VCC ELECTRICAL CHARACTERISTICS Parameter Condition Symbol Operating Current TSG=ON ICC Video Output Level VO Video input Signal (Pin8)=0.5VPP (Note 1) Video Modulation Depth mp Video input Signal (Pin8)=0.5VPP (Note 1) Video Limiter Modulation mpmax Video input Signal (Pin8)=1VPP Depth (Note 1) Video input Signal (Pin8)=0.5VPP Differential Gain DG Staircase Video input Signal (Pin8)=0.5VPP DP Differential Phase Staircase Picture-to-sound Ratio PS Video input Signal (Pin8)=0.5VPP (Note 1) Sound FM Modulation Deviation of fs per 100mV βb Sensitivity (Note 1) Audio input (Pin3)=50mVPP Audio Distortion THD 1kHz sine wave Audio Signal-to-noise Sound Modulation 60kHzPP ASN Ratio 1kHz sine wave Maximum Sound FM Audio input (Pin3)=1.0VPP msmax Modulation 1kHz sine wave TSG Horizontal Sync TSG =ON TSG Signal Cycle V °C °C Min. 4.5 Typ. 5.0 Max. 5.5 (TA=25°C) Unit V (VCC=5V,TA=25°C) Max. Unit 35 mA Min. 18 Typ. 26 (78) 81 (84) dBu (70) 76 (82) % (85) 94 (98) % -- ±3 -- % -- ±3 -- deg (11) 13 (15) dB (0.39) 0.51 (0.63) KHz/mV -- 0.3 -- % -- 60 -- dB -- 500 -- % (62) 64 (66) uS (Note 1) Because AC characteristics largely depends on application circuit, these parameters are specified by the DC characteristics as shown in next page. -2- NJW1502 DC ELECTRICAL CHARACTERISTICS (VCC=5V,TA=25°C, otherwise noted. All measurements performed in the DC test circuit are shown in next page) Parameter Condition (Note 2) Symbol Min. Typ. Max. Unit RF OUT output voltage. Video Output Signal Vp1 5.9 9.6 mVrms P/S Adj. input level =Vv Amplitude 1 OSC1/2=0dBm(20MHz sine wave) RF OUT output voltage. Video Output Signal Vp2 1.21 2.48 mVrms P/S Adj. input level =Vv+0.44V Amplitude 2 OSC1/2=0dBm(20MHz sine wave) Video Modulation Depth Mp = ((Vp1-Vp2 / Vp1) x 100 Mp 68 76 82 % Psg =20log((Psg2-Psg1)/ Picture-to-sound Ratio Psg 11 13 15 dB 2 x(Psg2+Psg1)) Sound FM Modulation Mg=(Fg1-Fg2)/200 Mg 0.39 0.51 0.63 KHz/mV Sensitivity (Note 2) Explanation of symbols • Vv • Vps : P/S Adj. output voltage at Pin1, Vcc=5V • Psg1 : RF OUT output level at Pin15 OSC =0dBm(F=20MHz Sine Wave) : VIDEO IN output voltage at Pin8, Vcc=5V P/S Adj.(Pin1) input level=Vps-0.17V • Psg2 : RF OUT output level at Pin15 OSC =0dBm(F=20MHz Sine Wave) P/S Adj.(Pin1) input level=Vps+0.17V • Fg1 : RF OUT output level at Pin15 AUDIO IN=0.1V,TANK SW selects TANK1. -3- NJW1502 AC TEST CIRCUIT VC RF OUT SW 1u OSC2 OSC1 TANK2 GND VIDEO IN 1 2 3 4 5 6 7 8 1u SW 1n 1n 68p 68p OSC GND OSC VCC TANK1 9 RF GND 10 REG OUT 11 TSG 12 AUDIO IN 13 RF OUT 14 TANK SW 15 P/S adj. 16 VCC + + AUDIO IN VIDEO IN DC TEST CIRCUIT Vcc OSC 500kHz OSC2 OSC1 TANK2 GND VIDEO IN 3 4 5 6 7 8 1n SW + 1n 68p GPAL 68p IPAL OSC GND OSC Vcc TANK1 2 Vcc RF GND 9 1 1u -4- 10 REG OUT 11 TSG 12 AUDIO IN 13 RF OUT 14 TANK SW 15 P/S adj. 16 Buff er Buff er [Forw ard] [Reverse] SW 1u + NJW1502 TERMINAL CHARACTERISTICS Typ.DC No. Symbol Voltage (V) Equivalent Circuit Function 1 P/S adj 3.0 Picture-to-sound Ratio Adjust 2 TANK SW - Tank 1/Tank 2 Select Switch 3 AUDIO IN - Audio Signal Input 4 REG OUT 4.0 Regulator Output 5 TANK 1 2.8 Tank Coil for Sound FM Modulation Circuit -5- NJW1502 No. Symbol Typ.DC Voltage (V) 6 TANK 2 2.6 Tank Coil for Sound FM Modulation Circuit 7 GND - GND 8 VIDEO IN 2.6 Video Signal Input 9 OSC GND - GND 10 11 OSC1 OSC2 - RF Oscillator 12 OSC Vcc - RF Oscillator Power Supply -6- Equivalent Circuit Function NJW1502 No. Symbol Typ.DC Voltage (V) 13 RF GND - GND 14 TSG - TSG ON/OFF Switch 15 RF OUT 3.9 RF Signal Output 16 Vcc - Power Supply Equivalent Circuit Function -7- NJW1502 TYPICAL CHARACTERISTICS TA=25°C VIDEO OUTPUT LEVEL vs Vcc Icc vs Vcc 84 40 83 Vo [ dBuV ] Icc [ mA ] 30 20 82 81 80 10 79 78 0 0 2 4 6 8 4.5 10 5 AUDIO MODULATION SENSITIVITY vs Vcc 0.63 82 81 80 79 78 77 76 75 74 73 72 71 70 0.59 βb [ KHz/mV ] mp [ % ] VIDEO MODULATION vs Vcc 0.55 0.51 0.47 0.43 0.39 4.5 5 Vcc [ V ] 5.5 4.5 5 ＧＰＡＬ TSG CYCLE [ uS ] 66 65 64 63 62 -20 0 20 40 60 TEMPERATURE [ C ] 5.5 Vcc [ V ] TSG CYCLE vs TEMPERATURE -8- 5.5 Vcc [ V ] Vcc [ V ] 80 ＩＰＡＬ 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.