Page 5 of the datasheet (
http://datasheets.maximintegrated.com/en/ds/DS9490-DS9490R.pdf) has a
schematic including the DS9503 diode that might be a problem.
On the other hand, it's probably not worth your time chasing this down,
rather than just buying another 9490R.
This doesn't seem to be too
Paul Alfille-2 wrote
Page 5 of the datasheet (
http://datasheets.maximintegrated.com/en/ds/DS9490-DS9490R.pdf) has a
schematic including the DS9503 diode that might be a problem.
On the other hand, it's probably not worth your time chasing this down,
rather than just buying another 9490R.
Off the top of my head:
Link-USB (ibuttonlink.com)
USB9097
http://www.ebay.com/itm/PCsensor-1-Wire-adapter-thermometer-replace-DS9097-DS9490-NEW-/281307951738?pt=US_Weather_Metershash=item417f42b27a
The latter uses the serial protocol and so is slightly slower for large
directories. The LINK is
vermus wrote
ps. Can you give a bus voltage from DS9490R ? In my case it ~ 1 Volt (3
and 4 pin), but AFAIK sensors on parasite power needs 3-5V...
i was right..
Typically, 1-Wire slave devices operate over the voltage range of 2.8V
(min) to 5.25V (max).
Something wrong with my DS9490R.
--
Am 14.04.2014 14:44, schrieb vermus:
vermus wrote
ps. Can you give a bus voltage from DS9490R ? In my case it ~ 1 Volt (3
and 4 pin), but AFAIK sensors on parasite power needs 3-5V...
i was right..
Typically, 1-Wire slave devices operate over the voltage range of 2.8V
(min) to 5.25V
