| ??? 05/27/08 16:25 Read: times |
#155167 - then try MAX3158 Responding to: ???'s previous message |
What is wrong with sn75lbc176 or even old 75176 in my application - that is quiestion?
Nothing... as long as .. you do not need galvanic isolation .. you use 3 resistor termination .. you do not need a high CMRR (common mode rejection rarto) Linear have good prices (6.5USD) for LTC1535CSW , but - where to buy chips (no Digikey, no Mouser) - online minimum is 250USD+68USD Fedex - where to buy transformer - listed in datasheet are not listed in Digikey or Mouser. then try MAX3158 If You really are interested about galvanic isolation - i have 5 silos with weigh scales . Nobody cant guarantee what will happen in rainy day. a short/leak/whatever will hurt a galvanically isolated 485 bus just as much as a non-isolated. Erik |
| Topic | Author | Date |
| RS485 questions | 01/01/70 00:00 | |
| Yes its required | 01/01/70 00:00 | |
| + | 01/01/70 00:00 | |
| you can not achieve isolation .... | 01/01/70 00:00 | |
| + | 01/01/70 00:00 | |
| why common power and isolated 485? | 01/01/70 00:00 | |
| where to get supply | 01/01/70 00:00 | |
| RS485 experiences | 01/01/70 00:00 | |
| all the stuff inside | 01/01/70 00:00 | |
| Prifibus alike | 01/01/70 00:00 | |
| not with '176 | 01/01/70 00:00 | |
| sn75lbc176 planed | 01/01/70 00:00 | |
| why galvanic isolation ? | 01/01/70 00:00 | |
| what is wrong? | 01/01/70 00:00 | |
| then try MAX3158 | 01/01/70 00:00 | |
| how about this little gem? | 01/01/70 00:00 | |
| have you read it fully | 01/01/70 00:00 | |
| It's just another way to get the job done. | 01/01/70 00:00 | |
| OK, I'll bend it in neon | 01/01/70 00:00 | |
| Prifibus alike ..... it isn't | 01/01/70 00:00 | |
| Galavanic isolation | 01/01/70 00:00 | |
| Galavanic isolation | 01/01/70 00:00 | |
| Do it like Profibus | 01/01/70 00:00 | |
| economical approach | 01/01/70 00:00 | |
Thanks for all answers! | 01/01/70 00:00 |