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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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DAC0807LCN Folha de dados(PDF) 7 Page - National Semiconductor (TI) |
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DAC0807LCN Folha de dados(HTML) 7 Page - National Semiconductor (TI) |
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7 / 10 page  Test Circuits (Continued) TLH5687 – 9 FIGURE 6 Reference Current Slew Rate Measurement (Note 7) TLH5687 – 10 FIGURE 7 Positive VREF (Note 7) TLH5687 – 11 FIGURE 8 Negative VREF (Note 7) Application Hints REFERENCE AMPLIFIER DRIVE AND COMPENSATION The reference amplifier provides a voltage at pin 14 for con- verting the reference voltage to a current and a turn-around circuit or current mirror for feeding the ladder The reference amplifier input currrent I14 must always flow into pin 14 regardless of the set-up method or reference voltage polarity Connections for a positive voltage are shown in Figure 7 The reference voltage source supplies the full current I14 For bipolar reference signals as in the multiplying mode TLH5687 – 12 FIGURE 9 Programmable Gain Amplifier or Digital Attenuator Circuit (Note 7) R15 can be tied to a negative voltage corresponding to the minimum input level It is possible to eliminate R15 with only a small sacrifice in accuracy and temperature drift The compensation capacitor value must be increased with increases in R14 to maintain proper phase margin for R14 values of 1 25 and 5 kX minimum capacitor values are 15 37 and 75 pF The capacitor may be tied to either VEE or ground but using VEE increases negative supply rejection 7 |
Nº de peça semelhante - DAC0807LCN |
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Descrição semelhante - DAC0807LCN |
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