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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP4728-E/UN датащи(PDF) 27 Page - Microchip Technology |
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MCP4728-E/UN датащи(HTML) 27 Page - Microchip Technology |
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27 / 66 page  © 2009 Microchip Technology Inc. DS22187C-page 27 MCP4728 4.9 Analog Output Vs. DAC Input Code Table 4-6 shows an example of the DAC input data code vs. analog output. The MSB of the input data is always transmitted first and the format is unipolar binary. TABLE 4-5: LDAC AND UDAC CONDITIONS VS. OUTPUT UPDATE LDAC Pin UDAC Bit DAC Output (VOUT) 00 Update all DAC channel outputs. 01 Update all DAC channel outputs. 10 Update a selected DAC channel output. 11 No update TABLE 4-6: DAC INPUT CODE VS. ANALOG OUTPUT (VOUT) DAC Input Code VREF = Internal (2.048 V) VREF = VDD Gain Selection Nominal Output Voltage (V) (See Note 1) Gain Selection Nominal Output Voltage (V) 111111111111 x1 VREF - 1 LSB Ignored VDD - 1 LSB x2 2*VREF - 1 LSB 111111111110 x1 VREF - 2 LSB VDD - 2 LSB x2 2*VREF - 2 LSB 000000000010 x1 2 LSB 2 LSB x2 2 LSB 000000000001 x1 1 LSB 1 LSB x2 1 LSB 000000000000 x1 0 0 x2 0 Note 1: (a) LSB with gain of 1 = 0.5 mV, and (b) LSB with gain of 2 = 1 mV. |
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