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LM1282N データシート(PDF) 3 Page - National Semiconductor (TI) |
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LM1282N データシート(HTML) 3 Page - National Semiconductor (TI) |
3 / 14 page AC Electrical Characteristics (Note 15) See AC Test Circuit ( Figure 3),T A = 25˚C, VCC1 = VCC2 = 12V; V4 = 0V. Manually adjust Video Output pins 18, 20, and 23 to 4V DC for the AC test unless otherwise stated Symbol Parameter Conditions Typical Limit Units (Note 5) (Note 6) A V max Video Amplifier Gain V 13 = 4V, VIN = 400 mVPP 10.0 7.0 V/V (min) V drive = 4V 20.0 16.9 dB (min) ∆A V2V Contrast Attenuation @ 2V Ref: A V max, V13 = 2V −6 dB ∆A V 0.25V Contrast Attenuation @ 0.25V Ref: A V max, V13 = 0.25V −24 dB ∆Drive 2V Drive Attenuation @ 2V Ref: A V max, Vdrive = 2V −4.5 dB ∆Drive 0.25V Drive Attenuation @ 0.25V Ref: A V max, Vdrive = 0.25V −11 dB A V match Absolute Gain Match @ A V max V 13 = 4V, Vdrive = 4V (Note 9) ±0.3 dB A V track Gain Change between Amplifiers V 13 = 4V to 2V (Notes 9, 10) ±0.2 dB THD Video Amplifier Distortion V O = 1VPP,f = 10 kHz 1 % f(−3 dB) Video Amplifier Bandwidth V 13 = 4V, Vdrive = 3V, 110 MHz (Notes 11, 12) V O = 4VPP t r (Video) Video Output Rise Time (Note 11) V O = 4VPP 3.0 ns t f (Video) Video Output Fall Time (Note 11) V O = 4VPP 4.0 ns V sep 10 kHz Video Amplifier 10 kHz Isolation V 13 = 4V (Note 13) −70 dB V sep 10 MHz Video Amplifier 10 MHz Isolation V 13 = 4V (Notes 11, 13) −50 dB t r (Blank) Blank Output Rise Time (Note 11) Blank Output = 1V PP 8ns t f (Blank) Blank Output Fall Time (Note 11) Blank Output = 1V PP 14 ns t r-prop (Blank) End of Blanking Propagation Delay Blank Output = 1V PP 23 ns t f-prop (Blank) Start of Blanking Propagation Delay Blank Output = 1V PP 20 ns T pw (Clamp) Back Porch Clamp Pulse Width (Note 14) 200 ns (min) OSD Electrical Characteristics See DC Test Circuit ( Figure 2), T A = 25˚C; VCC1 = VCC2 = 12V; V13 = 4V; V14 = 4V; V16 = 4V; VDrive = 4V; V4 = 4V; V15 = 0V; V 25 = 1V unless otherwise stated Symbol Parameter Conditions Typical Limit Units (Note 5) (Note 6) V OSDI OSD Input Low Input Voltage 1.2 0.4 V (max) V OSDh OSD Input High Input Voltage 1.6 2.0 V (min) V 4l OSD Select Low Input Voltage Video Inputs are Selected 1.2 0.8 V (max) V 4h OSD Select High Input Voltage OSD Inputs are Selected 1.6 2.0 V (min) I 4l OSD Select Low Input Current V 4 = 0V −3.0 −6.0 µA (max) I 4h OSD Select High Input Current V 4 = 12V 0.01 1.0 µA (min) ∆V O-OSD(1V) OSD ∆Black Level Output Voltage, V 25 = 1V ±45 ±175 mV (max) Difference from Video Output V OSD-out OSD Output Voltage V PP V 14 = 4V, VDrive = 2V 5.0 V PP ∆V OSD-out OSD Output V PP Attenuation V 14 = 2V, VDrive = 2V 50 30 % (min) ∆V OSD-out match Output Match between Channels V 14 = 4V, VDrive = 2V ±2.0 % V OSD-out track Output Variation between Channels V 14 = 4V to 2V, VDrive = 2V ±3.5 % t r (OSD S) Video to OSD Switch Time (Note 11) V 1 = V2 = V3 = 4V (Note 16) 4 ns t f (OSD S) OSD to Video Switch Time (Note 11) V 1 = V2 = V3 = 4V (Note 16) 11 ns t r-prop (OSD S) Video to OSD Propagation Delay V 1 = V2 = V3 = V13 = V14 = 4V 11 ns t f-prop (OSD S) OSD to Video Propagation Delay V 1 = V2 = V3 = V13 = V14 = 4V 12 ns t r (OSD) OSD Rise Time at V O (Note 11) V 14 = 4V; V25 = 1V 4 ns t f (OSD) OSD Fall Time at V O (Note 11) V 14 = 4V; V25 = 1V 10 ns t r-prop (OSD) Starting OSD Propagation Delay V 14 = 4V; V25 = 1V 6.5 ns t f-prop (OSD) Ending OSD Propagation Delay V 14 = 4V; V25 = 1V 9 ns 3 www.national.com |
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