RF Modulator for VHF Band - JRC
Description
NJM2536A
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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
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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 -0.
3 to VCC -20 to +75 -40 to +125
(TA=25°C) Unit V mW V °C °C (TA=25°C) Unit V
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 βb Sensitivity Audio input signal(Pin7)=0.
05VPP Audio Distortion THD 1kHz sine wave Audio Signal-...
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