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71M6541F Datasheet(PDF) 13 Page - Maxim Integrated Products |
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71M6541F Datasheet(HTML) 13 Page - Maxim Integrated Products |
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13 / 166 page  71M6541D/F/G and 71M6542F/G Data Sheet Rev 2 13 Figure 3 shows the 71M6541D/F/G multiplexer interface with one local and one remote resistive shunt sensor. As seen in Figure 3, when a remote isolated shunt sensor is connected via the 71M6x01, the samples associated with this current channel are not routed to the multiplexer, and are instead transferred digitally to the 71M6541D/F/G via the digital isolation interface and are directly stored in CE RAM. See Figure 6 for the multiplexer timing sequence corresponding to Figure 3. See Figure 36 for the meter configurations corresponding to Figure 3. ∆Σ ADC CONVERTER VREF MUX VREF VREF VADC 22 FIR IBP IAP VADC10 (VA) IAN IBN 71M6541D/F CE RAM 71M6x01 SP SN INP INN Remote Shunt IN* Digital Isolation Interface Local Shunt ILINE 22 11/5/2010 * IN = Optional Neutral Current Figure 3. 71M6541D/F/G AFE Block Diagram with 71M6x01 Figure 4 shows the 71M6542F/G AFE with locally connected sensors. The analog input signals (IAP-IAN, VA, IBP-IBN and VB) are multiplexed to the ADC input and sampled by the ADC. The ADC output is decimated by the FIR filter and stored in CE RAM where it can be accessed and processed by the CE. See Figure 7 for the multiplexer timing sequence corresponding to Figure 4. See Figure 37 for the meter configuration corresponding to Figure 4. ∆Σ ADC CONVERTER VREF MUX VREF VREF VADC 22 FIR IBP IAP VADC10 (VA) IAN IBN 71M6542F CE RAM Local Shunt IB CT IA or CT 11/5/2010 IA VADC9 (VB) Figure 4. 71M6542F/G AFE Block Diagram (Local Sensors) |
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