TCA650

The TCA650 is designed as an itegrated synchronous demodulator for both the SECAM and PAL chrominance signals. Switching of the standard is performed internally, controlled by an external applied d.c. signal.

Some absolute maximum ratings of TCA650 have been concluded into several points as follow. (1)Its supply voltage would be max 13.2V. (2)Its total power dissipation would be max 510mW. (3)Its storage temperature range would be from -25°C to 125°C. (4)Its operating ambient temperature range would be from -25°C to 65°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of TCA650 are concluded as follow. (1)Its supply voltage range would be typ 12V and would be from 10.2V to 13.2V. (2)Its chrominance input signal peak-to-peak value would be from 35mV to 75mV for PAL and would be from 150mV to 400mV for SECAM. (3)Its impedance would be from 1.2kohms to 2.6kohms. (4)Its PAL matrix gain from both inputs to pin 13 would be from 2.3 to 3.3 and gain from both inputs to pin 15 would be from 2.6 to 3.6 and gain difference from line-to-line would be less than 5%. (5)Its output impedance would be less than 100ohms. (6)Its SECAM permutator disphotie would be max -46dB. (7)Its output signal (peak to peak value) would be from 1.6V to 2.2V. (8)Its output impedance would be max 100ohms. (9)Its chrominance input signal amplitude would be typ 0.22V for PAL (B-Y) peak to peak value and would be typ 0.28V for PAL (R-Y) peak to peak value and would be from 1.5V to 3.0V for SECAM peak to peak value. (10)Its input impedance would be more than 1kohms. (11)Its reference input signal amplitude would be from 0.5V to 1.5V for PAL peak to peak value and would be 0.18V to 1.5V for SECAM peak to peak value. (12)Its input impedance would be from 0.75kohms to 1.25kohms. And so on. If you have any question or suggestion or want to know more information of  TCA650,  please contact us for details. Thank you!