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AD5556 Datasheet(PDF) 13 Page - Analog Devices |
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AD5556 Datasheet(HTML) 13 Page - Analog Devices |
13 / 20 page ![]() Data Sheet AD5546/AD5556 Rev. D | Page 13 of 20 VDD ROFS ROFSA VOUT RFB RFBA C6 GND U1 AD5546/AD5556 IOUT R2 R1 RCOMA R1A 16-/14-BIT DATA 16-/14-BIT DATA VREFA U2B OP2177 – + C4 1µF C5 0.1µF C8 1µF C9 0.1µF +15V –15V WR WR LDAC LDAC RS RS MSB MSB C2 0.1µF C1 1µF V+ V– U2A OP2177 + – C7 +5V +10V –10V Figure 20. Unipolar Two-Quadrant Multiplying Mode, VOUT = 0 to +VREF 2 5V 6 5 4 GND VIN TRIM U3 ADR03 VOUT 5V VDD R1 ROFS ROFS –VREF TO +VREF VOUT RFB RFB C2 GND U1 AD5546/AD5556 IOUT R2 U2A OP2177 + – C1 –VREF +VREF RCOM R1 16-/14-BIT DATA 16-/14-BIT DATA REF U2B OP2177 – + WR WR LDAC LDAC RS RS MSB MSB Figure 21. Four-Quadrant Multiplying Mode, VOUT = –VREF to +VREF BIPOLAR MODE Four-Quadrant Multiplying Mode, VOUT = –VREF to +VREF The AD5546/AD5556 contain on-chip all the four-quadrant resistors necessary for the precision bipolar multiplying operation. Such a feature minimizes the number of exponent components to only a voltage reference, dual op amp, and compensation capacitor (see Figure 21). For example, with a 10 V reference, the circuit yields a precision, bipolar –10 V to +10 V output. AD5546 VOUT = (D/32768 − 1) × VREF (5) AD5556 VOUT = (D/16384 − 1) × VREF (6) Table 10 shows some of the results for the 16-bit AD5546. |
Similar Part No. - AD5556_15 |
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Similar Description - AD5556_15 |
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