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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP4728 датащи(PDF) 53 Page - Microchip Technology |
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MCP4728 датащи(HTML) 53 Page - Microchip Technology |
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53 / 66 page  © 2009 Microchip Technology Inc. DS22187C-page 53 MCP4728 7.6 Application Examples The MCP4728 device is a rail-to-rail output DAC designed to operate with a VDD range of 2.7V to 5.5V. Its output amplifier of each channel is robust enough to drive common, small-signal loads directly, thus eliminating the cost and size of external buffers for most applications. Since each channel has its own configuration bits for selecting the voltage reference, gain, power-down, etc., the MCP4728 device offers great simplicity and flexibility to use for various DAC applications. 7.6.1 DC SET POINT OR CALIBRATION VOLTAGE SETTINGS A common application for the MCP4728 device is a digitally-controlled set point or a calibration of variable parameters such as sensor offset or bias point. Figure 7-3 shows an example of the set point settings. Let us consider that the application requires different trip voltages (Trip 1 - Trip 4). Assuming the DAC output voltage requirements are given as shown in Table 7-1, examples of sending the Sequential Write and Fast Write commands are shown in Figure 7-4 and Figure 7-5. TABLE 7-1: EXAMPLE: SETTING VOUT OF EACH CHANNEL DAC Channel Voltage Reference DAC Output (VOUT) VOUT A VDD VDD/2 VOUT B VDD VDD - 1 LSB VOUT C Internal 2.048V VOUT D Internal 4.096V |
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