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AD7628BQ Datasheet(PDF) 5 Page - Analog Devices |
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AD7628BQ Datasheet(HTML) 5 Page - Analog Devices |
5 / 8 page AD7628 –5– REV. A Table I. Unipolar Binary Code Table DAC Latch Contents Analog Output MSB LSB (DAC A or DAC B) 1 1 1 1 1 1 1 1 –V IN 255 256 1 0 0 0 0 0 0 1 –V IN 129 256 1 0 0 0 0 0 0 0 –V IN 128 256 = – V IN 2 0 1 1 1 1 1 1 1 –V IN 127 256 0 0 0 0 0 0 0 1 –V IN 1 256 0 0 0 0 0 0 0 0 –V IN 0 256 = 0 NOTE: 1 LSB = (2–8)(VIN) = 1 256 V IN () Figure 4. Dual DAC Unipolar Binary Operation (2 Quadrant Multiplication). See Table I. Figure 5. Dual DAC Bipolar Operation (4 Quadrant Multiplication). See Table II. Table II. Bipolar (Offset Binary) Code Table DAC Latch Contents Analog Output MSB LSB (DAC A or DAC B) 1 1 1 1 1 1 1 1 +V IN 127 128 1 0 0 0 0 0 0 1 +V IN 1 128 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 –V IN 1 128 0 0 0 0 0 0 0 1 –V IN 127 128 0 0 0 0 0 0 0 0 –V IN 128 128 NOTE: 1 LSB = (2 –7)(V IN) = 1 128 V IN () Table III. Recommended Trim Resistor Values Trim Resistor K/B/T R1; R3 500 R2; R4 150 |
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