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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD5451 датащи(PDF) 17 Page - Analog Devices |
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AD5451 датащи(HTML) 17 Page - Analog Devices |
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17 / 20 page  Data Sheet AD5547/AD5557 Rev. D | Page 17 of 20 AC Reference Signal Attenuator Besides handling the digital waveform decoded from the parallel input data, the AD5547/AD5557 can also handle low frequency ac reference signals for signal attenuation, channel equalization, and waveform generation applications. The maximum signal range can be up to ±18 V (see Figure 24). System Calibration The initial accuracy of the system can be adjusted by trimming the voltage reference ADR0x with a digital potentiometer (see Figure 25). The AD5170 provides a one-time programmable (OTP), 8-bit adjustment that is ideal and reliable for such calibration. Analog Devices, Inc., OTP digital potentiometer comes with programmable software that simplifies factory calibration. WR WR RS RS 2 LDAC AD5547/AD5557 16/14 DATA VDD ROFSA RFBA C6 RFB ROFS MSB A0, A1 IOUTA AGNDA C2 0.1µF C1 1µF VOUTA MSB A0, A1 LDAC +10V –10V +5V OP2177 C7 R1A RCOMA R2 R1 VREFA 16-/14-BIT C4 +15V U2B 1µF 0.1µF C5 C8 1µF 0.1µF C9 OP2177 +V –V U2A U1 –15V Figure 24. Signal Attenuator with AC Reference WR WR RS RS 2 LDAC AD5547/AD5557 16/14 DATA VDD ROFSA RFBA C6 RFB ROFS MSB A0, A1 IOUTA U2B +5V AGNDA C1 1µF C2 0.1µF C3 0.1µF VOUTA MSB A0, A1 LDAC REF 01/AD 4 5 10kΩ 1kΩ 6 U3 AD5170 R7 R3 +2.5V U4 U2 B 470kΩ 2 +5V 0V TO +2.5V –2.5V AD8628 C7 R1A RCOMA R2 U1 R1 VREFA 16-/14-BIT GND ADR03 VOUT TRIM VIN C4 1µF 0.1µF C5 AD8628 +V –V Figure 25. Full-Span Calibration |
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