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LM1237 Fiches technique(PDF) 4 Page - National Semiconductor (TI) |
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LM1237 Fiches technique(HTML) 4 Page - National Semiconductor (TI) |
4 / 42 page DAC Output Electrical Characteristics (Continued) Unless otherwise noted: T A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-P. See Note 7 for Min and Max parameters and Note 6 for Typicals. DAC parameters apply to all 4 DACs. Symbol Parameter Conditions Min Typ Max Units V Max DAC Mode 00 Max output voltage of DAC Register Value = 0xFF, DCF[1:0] = 00b 3.7 4.2 V V Max DAC Mode 01 Max output voltage of DAC in DCF mode 01 Register Value = 0xFF, DCF[1:0] = 01b 1.85 2.35 V ∆V Max DAC (Temp) Variation in voltage of DAC with temperature 0 < T < 70˚C ambient ±0.5 mV/˚C ∆V Max DAC (VCC) Variation in voltage of DAC with V CC 4.75 < V CC < 5.25V ±50 mV/V Linearity Linearity of DAC over its range 5 % Monotonicity Monotonicity of the DAC Excluding dead zones ±0.5 LSB I MAX Max Load Current −1.0 1.0 mA System Interface Signal Characteristics Unless otherwise noted: T A = 25˚C, VCC = +5.0V, VIN = 0.7V, VABL =VCC,CL = 8 pF, Video Outputs = 2.0 VP-P. See Note 7 for Min and Max parameters and Note 6 for Typicals. DAC parameters apply to all 4 DACs. Symbol Parameter Conditions Min Typ Max Units V VTH+ VFLYBACK positive switching guarantee. Vertical Blanking triggered 2.0 V V SPOT Spot Killer Voltage Note 17, V CC Adjusted to Activate 3.4 3.9 4.25 V V Ref V Ref Output Voltage 1.25 1.45 1.65 V V IL (SCL, SDA) Logic Low Input Voltage −0.5 1.5 V V IH (SCL, SDA) Logic High Input Voltage 3.0 V CC + 0.5 V I L (SCL, SDA) Logic Low Input Current SDA or SCL, Input Voltage = 0.4V ±10 µA I H (SCL, SDA) Logic High Input Voltage SDA or SCL, Input Voltage = 4.5V ±10 µA V OL (SCL, SDA) Logic Low Output Voltage I O = 3 mA 0.5 V f H Min Minimum Horizontal Frequency PLL & OSD Operational; PLL Range = 0 25 kHz f H Max Maximum Horizontal Frequency PLL & OSD Operational; PLL Range = 3 110 kHz I HFB IN Max Horizontal Flyback Input Current Absolute Maximum During Flyback 5 mA I IN Peak Current during flyback Design Value 4 mA I HFB OUT Max Horizontal Flyback Input Current Absolute Maximum During Scan −700 µA I OUT Peak Current during Scan Design Value −550 µA I IN THRESHOLD I IN H-Blank Detection Threshold 0 µA t H-BLANK ON H-Blank Time Delay - On + Zero crossing of I HFB to 50% of output blanking start. I 24 = +1.5mA 45 ns t H-BLANK OFF H-Blank Time Delay - Off − Zero crossing of I HFB to 50% of output blanking end. I 24 = −100µA 85 ns V BLANK Max Maximum Video Blanking Level Test Setting 4, AC input signal. 0 0.25 V f FREERUN Free Run H Frequency, including H Blank 42 kHz t PW CLAMP Minimum Clamp Pulse Width See Note 15 200 ns V CLAMP MAX Maximum Low Level Clamp Pulse Voltage Video Clamp Functioning 2.0 V V CLAMP MIN Minimum High Level Clamp Pulse Voltage Video Clamp Functioning 3.0 V I CLAMP Low Clamp Gate Low Input Current V 23 = 2V −0.4 µA I CLAMP High Clamp Gate High Input Current V 23 = 3V 0.4 µA www.national.com 4 |
Numéro de pièce similaire - LM1237 |
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Description similaire - LM1237 |
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