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LM7131ACMX датащи(PDF) 20 Page - National Semiconductor (TI) |
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LM7131ACMX датащи(HTML) 20 Page - National Semiconductor (TI) |
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20 / 23 page ![]() Using the LM7131 (Continued) D/A Output Amplifier The LM7131 can be used as an output amplifier for fast digital-to-analog converters. When using the LM7131 with converters with an output voltage range which may exceed the differential input voltage limit of ±2V, it may be necessary to add protection diodes to the inputs. See Figure 15. For high speed applications, it may be useful to consider low ca- pacitance schottky diodes. Additional feedback capacitance may be needed to control ringing due to the additional input capacitance from the D/A and protection diodes. When used with current output D/As, the input bias currents may pro- duce a DC offset in the output. This offset may be canceled by a resistor between the positive input and ground. Spice Macromodel A SPICE macromodel of the LM7131 and many other Na- tional Semiconductor op amps is available at no charge from your National Semiconductor representative. DS012313-24 FIGURE 15. D/A Ouput Amplifier www.national.com 20 |
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