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FS970X データシート(PDF) 39 Page - Fortune Semiconductor Corp. |
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FS970X データシート(HTML) 39 Page - Fortune Semiconductor Corp. |
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39 / 46 page  FS970X Rev. 4.4 39/46 AC Voltage (ACV) Vx TENM 10M R FUSE+PTC 1M or 100K or 10K or 1K XOHM COMMON 10K AGND SGND DCV XOHM XOHM TENM<0> ON CHIP OFF CHIP CPN AGND CPN<1> CPN<0> C COMPENSATION C DECOUPLE ACEN CMPEN1 ACBUF CMP1 AGND 1M 27nF INH INL FTR FTR BPFTR ADIMUX ADIMUX FTB FTC FTA OFF CHIP FREQ CMPMUX ACL SGND ACH 90K ACDIV 10K AGND ACDIVB 10uF RCTOP 2k RCTEN ACH AGND 100 K 47 nF ACL 25 19~22 18 17 38 37 40 39 42 43 36 35 41 23 24 17 Graph 20. Function network diagram of AC voltage. Address 00 01 02 03 04 05 06 07 08 Register RDG SIN SRF SCP AFT ADG SETADC MISC1 MISC2 0.5V 10h 5Bh 00h 10h F0h 93 9F 00 00 5V~100V x0h 5Bh 00h 10h D0h 93h 9Fh 00h 00h Chart 26. AC voltage register setup. Whereas, the value of RGD<7:4> is determined by the function, as show in Chart . The voltage signal of 5V~1000V will decay to be lower than 0.5V by a suitable multiple of decay network. It will go through a AC buffer with gain value of 1, and then into a AC/DC converter or true mean square converter. It then goes through a pre-filter, and into ADC. Under 0.5V, setting ACDIV=1 will allow the 10-times decay signal to be 10-times amplified by AC buffer, reversing it back within the dynamic range of 0.5V before feeding it into AC/DC converter or true mean square converter. DC Current (DCA) |
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