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LMC6009MT Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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LMC6009MT Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 7 page Block Diagram Applications The LMC6009 is useful for buffering the nine reference volt- ages for gamma correction in a TFT-LCD as shown in Figure 7. The A/B channel inputs allow the user to alternate two sets of gamma references to compensate for asymmetri- cal Gamma characteristic during Row Inversion. The LMC6009 eliminates the need for nine external switches or an 18-to-9 multiplexer. Since the buffers in the LMC6009 draw extremely low bias current (1.5 µA max), large resistance values can be used in the reference voltage string. This allows the power dissipa- tion in the gamma reference circuit to be minimized. The nine buffers are guaranteed to deliver 80 mA to the load, al- lowing the pixel voltages of the TFT-LCD to settle very quickly. DS012533-8 FIGURE 6. Block Diagram of LMC6009 www.national.com 5 |
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