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DAC8531E2K5 Datasheet(PDF) 11 Page - Texas Instruments |
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DAC8531E2K5 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 27 page DAC8531 11 SBAS192B www.ti.com THEORY OF OPERATION DAC SECTION The architecture consists of a string DAC followed by an output buffer amplifier. Figure 1 shows a block diagram of the DAC architecture. CODE CHANGE GLITCH Time (2 µs/div) Glitch Waveform (20mV/div) TYPICAL CHARACTERISTICS: VDD = 2.7V (Cont.) At TA = +25°C, VDD = 2.7V, unless otherwise noted. RESISTOR STRING Figure 2 shows the resistor string section. It is simply a string of resistors, each of value R. The code loaded into the DAC register determines at which node on the string the voltage is tapped off to be fed into the output amplifier by closing one of the switches connecting the string to the amplifier. It is ensured monotonic because it is a string of resistors. FIGURE 1. DAC8531 Architecture. The input coding to the DAC8531 is straight binary, so the ideal output voltage is given by: VV D OUT REF =• 65536 where D = decimal equivalent of the binary code that is loaded to the DAC register; it can range from 0 to 65535. FIGURE 2. Resistor String. DAC Register REF (+) Resistor String REF(–) Output Amplifier GND V DD V OUT V FB To Output Amplifier R R R R R |
Similar Part No. - DAC8531E2K5 |
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Similar Description - DAC8531E2K5 |
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