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DC1682B Datasheet(PDF) 6 Page - Linear Dimensions Semiconductor |
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DC1682B Datasheet(HTML) 6 Page - Linear Dimensions Semiconductor |
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6 / 26 page  6 dc1840bfc DEMO MANUAL DC1840B Demonstration circuit 1682B operation Board Layout ProperboardlayoutiscrucialforproperLTC4270/LTC4271 chipset operation, robustness, and accuracy. When lay- ing out, pay attention to parts placement, Kelvin sensing, power paths, and copper fill. It is imperative to follow the LTC4270/LTC4271 Layout Guide document when laying out the board. Figure 6. DC1682B Digital and Analog Isolation Isolation and Power Supplies The LTC4270/LTC4271 chipset provides communication across an isolation barrier through a data transformer (Figure 6). This eliminates the need for expensive opto- couplers. All digital pins reside on the digital ground refer- ence and are isolated from the analog PoE supply. A 3.3V supply for VDD and an isolated VEE supply are connected to the DC1682B through the 34-pin connector. VDD33 VDD33 T1 DND CPD CND DPD AGND VEE DNA VEE VEE ISOLATION WÜRTH 7490100143 CPA 34-PIN CONNECTOR DC1682B SIDE DC1680A SIDE VDD33 SUPPLY VEE SUPPLY CNA DPA TX+ RX– CT(4) CT(2) RX+ TX– TD+ RD– CT(3) CT RD+ TD– U1 LTC4271 U2 LTC4270 C23 1µF C21 0.1µF R13 100 DC1840B F06 DGND C19 1µF 100V R35 10 D1 SMAJ58A R14 100 C22 1µF R15 100 R16 100 R21 100 R22 100 R23 100 R24 100 C24, 2nF 2kV CBULK TVSBULK +– +– |
Similar Part No. - DC1682B |
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Similar Description - DC1682B |
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