Features: · FM- and AM-audio modulator· Audio carrier output for suppression of harmonics· Sync level clamping of video input signal· Controlling of peak white value· Continuous adjustment of modulation depth for positive or negative values· Symmetrical mixer output with separate ground area· Symm...
MGM 3000X: Features: · FM- and AM-audio modulator· Audio carrier output for suppression of harmonics· Sync level clamping of video input signal· Controlling of peak white value· Continuous adjustment of modula...
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Parameter |
Symbol |
Limit Values |
Unit
|
Remarks | |
min. |
max. | ||||
Supply voltage pin 8 |
VS |
0.3 |
14.5 |
V |
|
Current from pin 2 |
- I2 |
0 |
2 |
mA |
V2 = 7-8 V, VS = 10-13.5 V |
Voltage at pin 1 |
V1 |
0 |
2 |
V |
only via C (max.1mF) |
Voltage at pin 2 |
V2 |
6 |
8.5 |
V | |
Voltage at pin 12 |
V10 |
0 |
1.5 |
Vpp | |
Capacitance at pin 2 |
C2 |
0 |
100 |
nF |
|
Capacitance at pin 13 |
C13 |
0 |
15 |
mF |
|
Voltage at pin 14 |
V14 |
- 0.3 |
1.4 |
V |
VS = 10-13.5 V |
Voltage at pin 15 |
V15 |
V2 |
13.5 |
V | |
Voltage at pin 17 |
V17 |
V2 |
13.5 |
V | |
Voltage at pin 18 |
V18 |
V2 - 1.5 |
V2 + 1.5 |
V | |
According to the application circuit, only the provided circuitry can be connected
to pins 3, 4, 6, 7, 10, 11, 18 and 20. | |||||
Junction temperature |
Tj |
150 |
°C |
||
Storage temperature |
Tstg |
40 |
125 |
°C |
|
Thermal resistance |
Rth |
80 |
K/W |
||
Supply voltage |
VS |
10 |
13.2 |
V |
|
Video input frequency |
fVideo |
0 |
6 |
MHz |
|
Audio input frequency |
fAF |
0 |
20 |
kHz |
|
Output frequency |
fQ |
30 |
860 |
MHz |
depending on the oscillator circuitry atpins 3-7 |
Ambient temperature |
TA |
0 |
80 |
°C |
The MGM 3000X RF-oscillator is available at pins 3 - 7. The oscillator operates as a symmetrical Colpitts circuit. The MGM 3000X oscillator chip ground, pin 5, should be connected to ground at the resonance circuit shielding point. An external oscillator can be injected inductively or capacitively via pins 3 and 7. The layout of the PCB should be such as to provide a minimum shielding attenuation between the oscillator pins 3 - 7 and modulator output pins 15 - 17 of approximately 80 dB.