Video signal switcher

Transcription

1 ideo signal switcher The BA7606 and BA7606F are switching Is developed for use in video cameras. Each contains three two-channelanalog multiplexers. They feature a large dynamic range, and wide operating freqency range, and the switches have pedestal clamp inputs which are ideal for switching GB and video signals. Applications ideo cassette recorders and televisions Features ) Three -input / -output switches. ) 5 power supply. ) Pedestal clamp inputs 4) Low power consumption (6.5mW Typ.). 5) Excellent frequency characteristics (0MHz, db Typ.). 6) Wide dynamic range (.6p-p Typ.). 7) Fast switching speed (50ns Typ.). Block diagram 6 INa TLa Sa 5 GND OUTa 4 INb GND 4 Sb OUTb 5 TLb OUTc 6 INb TLc 7 S 0 LAMP PULSE INc 8 9 INc TL Output L IN Sa, Sb, Sc: H IN pedestal-clamped input Absolute maximum ratings (Ta = 5 ) Parameter Symbol Limits Unit Power supply voltage Power dissipation Pd mw Operating temperature Topr 40 ~ + 85 Storage temperature Tstg 55 ~ + 5 educed by 5.0mW for each increase in Ta of over 5.

2 Equivalent circuits 6 0.4k 50k 50k 7 0k 0 5k 4 k I 0.6mA I 0.mA I 0.6mA I4 ma k k 4 k Q6 Q Q Q9 Q8 Q7 Q0 Q Q Q4 Q5 Q6 Q Q5 Q4 Q OUT Pulse IN k 00 Q Q Q5 Q6 Q Q4 TL 6 5k 50k I 0.6mA I 0.5mA I 0.06mA Sa, Sb, Sc TL

3 Electrical characteristics (unless otherwise noted, Ta = 5 and cc = 5) Parameter Symbol Min. Typ. Max. Unit onditions Operating voltage Supply current Maximum output level U Maximum output level D oltage gain Interchannel crosstalk Frequency characteristics TL pin switch level lamp input level efer to the mesurement circuit given in Fig.. Note : Positive-side dynamic range from the clamp level Note : Negative-side dynamic range from the clamp level I ma omu P-P omd P-P G db T 65 db db Note Note f = MHz, IN = P-P f = 4.4MHz, IN = P-P 0MHz / MHz, IN = P-P TH ct eference date Pin D voltages (reference values) Units: dc Pin No. D voltage Pin No. D voltage Electrical characteristics Parameter Pedestal clamp level Input impedance (with clamp) Output impedance The input coupling capacitor values should be 0.µF to µf. Use a clamp pulse of at least µs (BA7606). The pin 6 output impedance of the BA7606 is 0Ω Min. Typ. Max. Unit dc.7m Ω 0 Ω

4 Measurement circuit PG PG PG Sb 47µ A PG Sb 4 Sb S4 Sa Sc PG Sa ~ ~ ~ Sc OUTa OUTb OUTc PG Sa Sc PG Input waveform PG INU PG 6.556µs IND 5 f = 4.4MHz f = MHz f = 0MHz = 50Ω = µf = D.5µs 0 Output waveform OUTU OUTD Fig. 4

5 Measurement conditions Parameter urrent dissipation Symbol Switch settings Sa Sa Sa Sb Sb Sb Sc Sc Sc S4c I 4 Measurement method Ammeter INa om Maximum output level (U or D) INb INb INc om om om om Note INc om oltage gain INa INb INb G G G G f = MHz IN = P-P Note INc G INc G Interchannel crosstalk INa INb INb INc T T T T T f = 4.4MHz IN = P-P Note INc T Frequency characteristic INa INb INb f = 0MHz f = MHz IN = P-P Note 4 INc INc TL pin switching level lamp pin TLa TLb TLc TH TH TH lamp ct f = MHz IN = P-P Note 5 Note 6 Note : omu is the value for OUTU when OUTU / INU db. omd is the value for OUTD when OUTD / IND db. Note : G = 0 log (OUT / IN). Note : T = 0 log (OUT / IN). Note 4: = 0 log (OUT (f = 0MHz) / OUT (f = MHz)). Note 5: educe the TL pin voltage from. The TL pin switching level (TH) is the TL pin voltage at which the OUT level drops below 0mP-P. Note 6: lamp pulse voltage at which OUT falls below 0.4 and clamp pulse voltage at which OUT falls below.4. 5

6 External dimensions (Units: mm) BA7606 BA7606F 9.4 ± ± 0.. ± ± Min ± ± ~ 5 0. ± ± 0..5 ± ± ± 0. 0.Min. 0.5 ± DIP6 SOP6 6