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LM1229YA Scheda tecnica(PDF) 7 Page - National Semiconductor (TI) |
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LM1229YA Scheda tecnica(HTML) 7 Page - National Semiconductor (TI) |
7 / 27 page System Interface Signal Characteristics (Continued) Unless otherwise noted: T A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 10 pF, Video Outputs = 2.4 VP-P. See (Note 7) for Min and Max parameters and (Note 6) for Typicals. Symbol Parameter Conditions Min Typ Max Units I L Logic low input current (SCL, SDA, HSYNC, VSYNC) SDA or SCL, Input Voltage = 0V ±10 µA I H Logic high input current (SCL, SDA, HSYNC, VSYNC) SDA or SCL, Input Voltage = 5.0V ±10 µA V OL Logic low output voltage (SCL, SDA) I O =3mA 0.5 V I FB THRESHOLD I IN blank detection threshold (pin 24) −20 µA I FB IN MAX Flyback input Absolute maximum current during flyback 5mA I FB IN MAX Peak flyback input current Design value - AC coupled 1.0 mA I FB OUT MAX Flyback input current Absolute maximum during scan −500 µA t H-BLANK ON Blanking time delay - on + Zero crossing of I FB to 50% of output blanking start. I FB = +1.5 mA 50 ns t H-BLANK OFF Blanking time delay - off − Zero crossing of I FB to 50% of output blanking end. I FB = −100 µA 50 ns V BLANK MAX Maximum video blanking level CONTRAST[6:0], RGAIN[6:0], GGAIN[6:0], BGAIN[6:0] = 0x7F, BRIGHTNESS[7:0] = 0x00, OFFSET[3:0] = 0xC, AC input signal. 0 0.25 V t PW CLAMP Minimum clamp pulse width See (Note 15) 200 ns V CLAMP MAX Maximum low level clamp voltage To guarantee low state 1.0 V V CLAMP MIN Minimum high level clamp voltage To guarantee high state 3.0 V I CLAMP LOW Clamp gate low input current V 23 = 0V −0.4 µA I CLAMP HIGH Clamp gate high input current V 23 = 5.0V 0.4 µA t CLAMP-VIDEO Minimum wait from end of clamp pulse to start of video. Referenced to RGB video inputs. 50 ns V HEHT-LOW Low limit of pin 20 HEHT input 1.4 V V HEHT-HIGH High limit of pin 20 HEHT input 3.4 V V VEHT1-LOW, V VEHT2-LOW Low limit of pins 8 and 9 VEHT inputs 1V V VEHT1-HIGH, V VEHT2-HIGH High limit of pins 8 and 9 VEHT inputs 4V Note 1: Limits of Absolute Maximum Ratings indicate below which damage to the device will not occur. Note 2: All voltages are measured with respect to GND, unless otherwise specified. Note 3: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Note 4: Human body model, 100 pF discharged through a 1.5 k Ω resistor. Note 5: Input from signal generator: tr,tf < 1 ns. Note 6: Typical specifications are specified at +25˚C and represent the most likely parametric norm. Note 7: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may change when the device is not operated under the listed test conditions. Note 8: The supply current specified is the quiescent current for VCC = 5V and with RL = ∞. Load resistors are not required and are not used in the test circuit, therefore all the supply current is used by the pre-amp. Note 9: Linearity Error is the maximum variation in step height of a 16 step staircase input signal waveform with a 0.7 VP-P level at the input. All 16 steps equal, with each at least 100 ns in duration. Note 10: dt/dVCC = 200*(t5.5V–t4.5V)/((t5.5V +t4.5V)) %/V, where: t5.5V is the rise or fall time at VCC = 5.5V, and t4.5V is the rise or fall time at VCC = 4.5V. Note 11: ∆AV track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three gain stages. It is the difference in gain change between any two amplifiers with the contrast set to AV 50% and measured relative to the AV MAX condition. For example, at AV MAX the three amplifiers’ gains might be 12.1 dB, 11.9 dB, and 11.8 dB and change to 2.2 dB, 1.9 dB and 1.7 dB respectively for contrast set to AV 50%. This yields a typical gain change of 10.0 dB with a tracking change of ±0.2 dB. Note 12: The ABL input provides smooth decrease in gain over the operational range of 0 dB to −5 dB: ∆AABL =AV MAX –AV (VABL =VABL MIN GAIN). Beyond −5 dB the gain characteristics, linearity and pulse response may depart from normal values. www.national.com 7 |
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