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LM1207 データシート(PDF) 3 Page - National Semiconductor (TI) |
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LM1207 データシート(HTML) 3 Page - National Semiconductor (TI) |
3 / 24 page AC Electrical Characteristics See AC Test Circuit (Figure 3) TA e 25 C VCC1 e VCC2 e 12V Manually adjust Video Output pins 17 20 and 26 to 4V DC for the AC test unless otherwise stated (Note 14) Symbol Parameter Conditions Typical Limit Units (Note 5) (Note 6) AV max Video Amplifier Gain V12 e 4V VIN e 635 mVPP 70 60 VV (min) Vdrive e 4V 169 156 dB (min) D AV2V Attenuation 2V Ref AV max V12 e 2V b 6dB D AV 025V Attenuation 025V Ref AV max V12 e 025V b 40 dB D Drive Drive Control Range Vdrive e 0V to 4V V12 e 4V 6 dB AV match Absolute Gain Match AV max V12 e 4V Vdrive e 4V (Note 9) g 03 dB AV track1 Gain Change Between Amplifiers V12 e 4V to 2V (Notes 9 10) g 01 dB THD Video Amplifier Distortion VO e 1VPP f e 10 kHz 1 % f(b3 dB) Video Amplifier Bandwidth V12 e 4V Vdrive e 4V LM1205 130 MHz (Notes 11 12) VO e 4VPP LM1207 85 tr(Video) Video Output Rise Time (Note 11) VO e 4VPP LM1205 26 ns LM1207 43 tf(Video) Video Output Fall Time (Note 11) VO e 4VPP LM1205 36 ns LM1207 43 Vsep 10 kHz Video Amplifier 10 kHz Isolation V12 e 4V (Note 13) b 70 dB Vsep 10 MHz Video Amplifier 10 MHz Isolation V12 e 4V (Notes 11 13) b 50 dB tr(Blank) Blank Output Rise Time (Note 11) Blank Output e 1VPP 7ns tf(Blank) Blank Output Fall Time (Note 11) Blank Output e 1VPP 7ns tpw(Clamp) Min Back Porch Clamp Pulse Width 200 ns Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur Note 2 Operating Ratings indicate conditions for which the device is functional but do not guarantee specific performance limits For guaranteed specifications and test conditions see the Electrical Characteristics The guaranteed specifications apply only for the test conditions listed Some performance characteristics may degrade when the device is not operated under the listed test conditions Note 3 VCC supply pins 3 11 22 23 25 must be externally wired together to prevent internal damage during VCC power onoff cycles Note 4 Human body model 100 pF discharged through a 15 kX resistor Note 5 Typical specifications are specified at a25 C and represent the most likely parametric norm Note 6 Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level) Note 7 The supply current specified is the quiescent current for VCC1 and VCC2 with RL e % see Figure 2’s test circuit The supply current for VCC2 (pin 23) also depends on the output load With video output at 1V DC the additional current through VCC2 is8mAfor Figure 2’s test circuit Note 8 Output voltage is dependent on load resistor Test circuit uses RL e 390X Note 9 Measure gain difference between any two amplifiers VIN e 635 mVPP Note 10 D AV track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three attenuators It is the difference in gain change between any two amplifiers with the contrast voltage (V12) at either 4V or 2V measured relative to an AV max condition V12 e 4V For example at AV max the three amplifiers’ gains might be 171 dB 169 dB and 168 dB and change to 112 dB 109 dB and 107 dB respectively for V12 e 2V This yields the measured typical g 01 dB channel tracking Note 11 When measuring video amplifier bandwidth or pulse rise and fall times a double sided full ground plane printed circuit board without socket is recommended Video amplifier 10 MHz isolation test also requires this printed circuit board The reason for a double sided full ground plane PCB is that large measurement variations occur in single sided PCBs Note 12 Adjust input frequency from 10 MHz (AV max reference level) to the b3 dB corner frequency (fb3dB) Note 13 Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation Terminate the undriven amplifier inputs to simulate generator loading Repeat test at fIN e 10 MHz for Vsep 10 MHz Note 14 During the AC tests the 4V DC level is the center voltage of the AC output signal For example if the output is 4 VPP the signal will swing between 2V DC and 6V DC http www nationalcom 3 |
同様の部品番号 - LM1207 |
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同様の説明 - LM1207 |
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