LM1262NA National Semiconductor, LM1262NA Datasheet
LM1262NA
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LM1262NA Summary of contents
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... Power Save (Green) Mode, 80% power reduction n Matched to 11-lead LM246X driver Applications n High end 19” and 21” bus controlled monitors with OSD n 1600 X 1200 higher applications n Low cost and high performance system with LM246X driver FIGURE 1. Order Number LM1262NA See NS Package Number N24D DS200404 March 2002 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage, Pin 9 Peak Video Output Source Current (Any One Amp) Pins 18, 19 Voltage at Any Input Pin ( Power Dissipation ( (Above 25˚C Derate based on ...
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Active Video Signal Electrical Characteristics Unless otherwise noted 25˚ Symbol Parameter V ABL Control Upper Limit ABL TH V ABL Active Range Control ABL Range Voltage A ABL Control Range ABL I ABL Input Bias Current ...
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OSD Electrical Characteristics Unless otherwise noted 25˚ ting 8. Symbol Parameter V OSD Select Low Input OSD-Sel-L Operating Range V OSD Select High Input OSD-Sel-H Operating Range I OSD Select Input Current OSD-Sel V OSD Black ...
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External Interface Signals Electrical Characteristics Unless otherwise noted 25˚ Symbol Parameter t H-Blank Time Delay from Zero H-Blank on Crossing Point of H Flyback t H-Blank Time Delay from Zero H-Blank off Crossing Point of H ...
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Typical Performance Characteristics Gain Attenuation ABL Attenuation Contrast vs Frequency www.national.com 25˚C unless otherwise specified Contrast Attenuation DS200404-2 Rise and Fall DS200404-4 Gain vs Frequency DS200404-6 6 DS200404-3 DS200404-5 DS200404-7 ...
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Test Circuit Note: 5pF load includes parasitic capacitance. Test Settings No. Control of Bits Contrast Gain 7 Video DC Offset & OSD Cont. 5 Timing Diagrams Basic Basic Basic Basic Test Test Test Test Setting 1 ...
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Timing Diagrams (Continued) Pin Descriptions Pin No. Pin Name 1 Red OSD Input 2 Green OSD Input 3 Blue OSD Input 4 OSD Select www.national.com FIGURE 3. OSD Output Skew Schematic These inputs accept standard TTL or CMOS inputs. Each ...
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Pin Descriptions (Continued) Pin No. Pin Name 5 Red Video In 6 Green Video In 7 Blue Video In 8 Analog Ground ref ext 11 SDA 12 SCL 13 DAC4 14 DAC3 15 DAC2 ...
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Pin Descriptions (Continued) Pin No. Pin Name 18 Blue Video Out 19 Green Video Out 20 Red Video Out 21 V Out Ref 22 ABL 23 Clamp Pulse 24 H Flyback www.national.com Schematic Video outputs of the LM1262. The ideal ...
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Functional Description All functions of the LM1262 are controlled through the I Bus. Details on the internal registers are covered in the Interface Registers Section. Figure 1 shows the block 2 diagram of the LM1262. The I ...
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Functional Description FIGURE 4. ABL H Flyback: H Flyback is an analog signal input from the monitor horizontal scan. The “H Blank” section uses this signal to add horizontal blanking to the output video signal. This enables the user to ...
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Functional Description 1. A logic level vertical blanking pulse comes in at pin 13. Bit 2 of register 0B is set to a “0” to enable this method. There is no output for DAC4, but its output is still con- ...
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Schematic FIGURE 8. High Speed Low Cost Neck Board Schematic www.national.com 14 DS200404-35 ...
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Schematic (Continued) FIGURE 9. High Speed Low Cost Neck Board Schematic 15 DS200404-36 www.national.com ...
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PCB Layout FIGURE 10. High Speed Low Cost System Neck Board Micro-Controller Interface The micro-controller interfaces to the LM1262 pre-amp via interface. The protocol of the interface begins with the Start Pulse followed by a byte ...
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Micro-Controller Interface (Continued) 2 FIGURE 11 Write Sequence 2 FIGURE 12 Read Sequence 17 DS200404-33 DS200404-32 www.national.com ...
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I C Interface Registers ADDRESS Slave Address of the LM1262 is DCh when writing to the registers and DD when reading from the registers. LM1262 Pre-Amp Interface Registers (all numbers in Hex) Register Ad- De- ...
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DAC Interface Register Definitions (Continued) 2 DAC 3 Register (I C address 06h) Register name: DAC 3 (06h) Bit 7 D3–7 D3–6 D3–5 D3–4 D3–3 D3–2 D3–1 D3–0 Bits 7–0: DAC 3. These eight bits determine the output voltage of ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted Order Number LM1262NA NS Package Number N24D 2 ...