NJM2536AM Nisshinbo

NJM2536A RF Modulator for VHF Band DESCRIPTION PACKAGE OUTLINE 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 NJM2536AM Regulator on chip Bipolar Technology Package Outline:DMP/SSOP14 BLOCK DIAGRAM 14 13 12 11 10 9 8 RF OSC REGULATOR CLAMP & WHITE CLIP MIXER CARRIER AUDIO FM OFF SW MODULATOR 12 3 4 5 6 7 - 1 - VIDEO IN VCC CARRIER CH SW OFF SW ANT SW CH2 DRIVE CH1 RF OUT GND2 GND1 P/S REG OUT 4.5MHz AUDIO IN TANK NJM2536A ABSOLUTE MAXIMUM RATINGS (T =25C) A Parameter Symbol Ratings Unit Supply Voltage V 7 V CC Power Dissipation P 300 mW D Input Voltage V -0.3 to V V I CC Operating Temperature Range T -20 to +75 C opr Storage Temperature Range T -40 to +125 stg C RECOMMENDED OPERATING VOLTAGE RANGE (T =25C) A Parameter Condition Symbol Min. Typ. Max. Unit Operating Voltage V 4.5 5.0 5.5 V CC ELECTRICAL CHARACTERISTICS (V =5V,T =25C) CC A Parameter Condition Symbol Min. Typ. Max. Unit No video/audio input signal, Operating Current I 13.5 16.0 22.5 mA CC CARRIER OFF SW(Pin2)=5V ANT SW DRIVE CARRIER OFF SW(Pin2)=5V V 3.7 4.0 4.3 V ANT1 Output Voltage 1 I =26mA D ANT SW DRIVE CARRIER OFF SW(Pin2)=Open V 0 0.065 0.1 V ANT2 Output Voltage 2 V =2V CC Video Output Level Video input signal(Pin1)=0.5V V (83) 86 (89) dBu PP O (Note 1) Video Modulation Depth Video input signal(Pin1)=0.5V mp (70) 76 (82) % PP (Note 1) Video Limiter Modulation Video input signal(Pin1)=1.0V PP mpmax (85) 94 (98) % Depth (Note 1) Video input signal(Pin1)=0.5V PP Differential Gain DG - - % 3 Staircase Video input signal(Pin1)=0.5V PP Differential Phase DP - - deg 3 Staircase Picture-to-sound Ratio Video input signal(Pin1)=0.5V PS (11) 13 (15) dB PP (Note 1) Sound FM Modulation Deviation of fs per 100mV - 0.51 - KHz/mV b Sensitivity Audio input signal(Pin7)=0.05V PP Audio Distortion THD - 0.3 - % 1kHz sine wave Audio Signal-to-noise Sound Modulation 60% ASN - 60 - dB Ratio 1kHz sine wave Maximum Sound FM Audio input signal(Pin7)=1.0V PP msmax - 700 - % Modulation 1kHz sine wave (Note 1) Because AC characteristics largely depends on application circuit, these parameters are specified by the DC characteristics as shown in next page. - 2 -