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AD2S99BP Scheda tecnica(PDF) 5 Page - Analog Devices |
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AD2S99BP Scheda tecnica(HTML) 5 Page - Analog Devices |
5 / 8 page REV. B –5– AD2S99 AD2S99/AD2S90 TYPICAL CONFIGURATION Figure 3 shows a typical circuit configuration for the AD2S99 Oscillator and the AD2S90 Resolver-to-Digital Converter. The maximum level of the SIN and COS input signals to the AD2S90 should be 2 V rms ±10%. All the analog ground sig- nals should be star connected to the AD2S90 AGND pin. If shielded twisted pair cables are used for the resolver signals, the shields should also be terminated at the AD2S90 AGND pin. The SYNREF output of the AD2S99 should be connected to the REF input pin of the AD2S90 via a 0.1 µF capacitor with a 100 k Ω resistor to GND. This is to block out any dc offset in the SYNREF signal. For more detailed information please refer to the AD2S90 data sheet. NC = NO CONNECT NC SIN NC DGND COS EXC EXC NC AGND NC 19 31 2 20 4 5 8 6 7 12 13 911 10 18 17 14 16 15 TOP VIEW (Not to Scale) AD2S99 19 3 1 2 20 4 5 8 6 7 12 13 9 11 10 18 17 14 16 15 4.7µF 4.7µF 0.1µF 0.1µF COS SIN REF S2 S4 S3 S1 R4 R2 RESOLVER REF COS AGND SIN SIN LO VDD VSS DGND AD2S90 TOP VIEW (Not to Scale) 0.1µF 100k Ω VDD VSS VDD 0.1µF 50k Ω 4.7µF 0.1µF 4.7µF VSS SEL2 = GND SEL1 = VSS FOUT = 5kHz COS LO S4 S3 S1 S2 VDD POWER RETURN VDD Figure 3. AD2S99 and AD2S90 Example Configuration |
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