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AD7533KP Datasheet(PDF) 8 Page - Analog Devices |
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AD7533KP Datasheet(HTML) 8 Page - Analog Devices |
8 / 12 page AD7533 Rev. C | Page 8 of 12 OPERATION UNIPOLAR BINARY CODE Table 4. Unipolar Binary Operation (2-Quadrant Multiplication) Digital Input Analog Output MSB LSB (VOUT as shown in Figure 11) 1 1 1 1 1 1 1 1 1 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 1024 1023 REF V 1 0 0 0 0 0 0 0 0 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 1024 513 REF V 1 0 0 0 0 0 0 0 0 0 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 2 1024 512 REF REF V V 0 1 1 1 1 1 1 1 1 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 1024 511 REF V 0 0 0 0 0 0 0 0 0 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 1024 1 REF V 0 0 0 0 0 0 0 0 0 0 0 1024 0 = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − REF V Nominal LSB magnitude for the circuit of Figure 11 is given by ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = 1024 1 REF V LSB 3 14 1 16 2 15 4 13 AD7533 UNIPOLAR DIGITAL INPUT MSB VDD VREF IOUT1 VOUT IOUT2 RFB C1 GND BIPOLAR ANALOG INPUT ±10V R1 1kΩ R2 330Ω LSB NOTES 1. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED. 2. C1 PHASE COMPENSATION (5pF TO 15pF) MAY BE REQUIRED WHEN USING HIGH SPEED AMPLIFIER. Figure 11. Unipolar Binary Operation (2-Quadrant Multiplication) BIPOLAR (OFFSET BINARY) CODE Table 5. Unipolar Binary Operation (4-Quadrant Multiplication) Digital Input Analog Output MSB LSB (VOUT as shown in Figure 12) 1 1 1 1 1 1 1 1 1 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + 512 511 REF V 1 0 0 0 0 0 0 0 0 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ + 512 1 REF V 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 512 1 REF V 0 0 0 0 0 0 0 0 0 1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 512 511 REF V 0 0 0 0 0 0 0 0 0 0 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − 512 512 REF V Nominal LSB magnitude for the circuit of Figure 12 is given by ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ = 512 1 REF V LSB 3 14 1 16 2 15 4 13 AD7533 BIPOLAR DIGITAL INPUT MSB VDD VREF IOUT1 VOUT IOUT2 C1 GND A1 A2 ±10V BIPOLAR ANALOG INPUT R1 1kΩ R2 330Ω R3 10kΩ R6 5kΩ R4 20kΩ LSB NOTES 1. R3, R4, AND R5 SELECTED FOR MATCHING AND TRACKING. 2. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED. 3. C1 PHASE COMPENSATION (5pF TO 15pF) MAY BE REQUIRED WHEN USING HIGH SPEED AMPLIFIERS. R5 20kΩ Figure 12. Bipolar Operation (4-Quadrant Multiplication) |
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