????????????

??????????????У?????????????????????????????????????????????????????????????????????????????????????????????г?????????????????????????????????????????????????????????????????????????????????????????

???????????
?? ????????DC 3.0V —5.5V?????5V??
?? ?????????????±1?? ????±5%??at 25?棩
?? ????????0?棭50??
?? ??????Χ?????20%—95%RH ??? 0?棭50??
?? ??????????????<2.5mA ??????<2uA??5V??
?? ??????????е????????
?? ?????磺??????2.54mm????λ??mm??

???????????????

3.1 ?????????????

??1?????????

?1?????????

3.2 ????????VDD GND??
?????????????3.0V—5.5V

3.3 ?????????SDA??
SDA???????????????????д???????????

????????????

4.1 ???????????

??????????????????????????????????????????SDA??????????????I/O?????????

????????????????
1. ????????·?н?????????????30??????10K?????????裬??????????t??????????????????????С??
2. ?????????????1S???????????????????????????????

4.2 ??????Э??

?????????????????????????????????????????????????????40bit?????????λ?????

????????40bit?????16bit??????? 16bit??????? 8bitУ???

???У?8bitУ???=8bit???????????+8bit???С??????+8bit???????????+8bit???С?????????λ?????

???磺???=56.0%RH?????=23.0?????
???????=56??10?????=00111000?????????
???????=23??10?????=00010111?????????

8bitУ???=00111000 + 00000000 + 00010111 + 0000 0000=0100 1111

?????????????????????????0?棭50?棬??и???????????????????????????????0?檔

Э??????????????????????????????????????????????

?????????????????MCU???????????????1mS???????????20??40uS????????????????

?????????????????????????????????????80uS????????????80uS??????????????????

???????80uS??SDA?????????????????????1bit????????????????????????????ɡ?????????????????50uS?????????????????λ???????????????????????????????????????λ???????????????????????????λ???“1”???????????????????λ???“0”?? ?????????40bit?????????????40bit???????????????????50uS???????????????????????????

?????????????2?????

?2??????????????

??2???????????????

4.3 ??????????

????1????????????磬??????1~5S???????????SDA??????????????

????2????????I/O????????????????????????????????????????2ms??????????????????????????????????????????????????80us???????????????????????????????80us????????2?е??????????????????????

????3??????????????????????????????SDA?????????????40bit?????????????I/O?????仯??????40λ?????

λ????“0”???????50us???????22~27us???????

λ????“1”???????50us???????70us??????????

?????????2?е?bit39??bit38?????

?塢?????

??????????

6.1 ??????????????

?????????????????????????????????????????????????????????????????????????????硣?????????????????????????·??????????????????????С??

?????????????á?

???滷???????20—35?棬???60%?????

6.2 ?????????????

?ò???????????????????????????????С???????????????е???????2?????????????????????????

6.3 ???????

???????????л???????е???????????????????????沽??????????????????????????40?棬<30%????????????±???2С?????????????????>65%??????????±???5С??????

6.4 ???????

?????????????260???????????????????????5??

????????
??????????????п????????
??????л??
?????18651101746
????XieYong@MEMSPlus.com