Anonymous
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May 12, 2016
10:02 AM
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May 12, 2016
10:02 AM
In wiced sense shematics I saw that wiced sense using LTC4313
Why do we need a I2C expander?
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I2C
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WICED Sense
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May 12, 2016
11:41 AM
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May 12, 2016
11:41 AM
I2C busses are limited by their picofarad load. They generally max out at about 400pf. And each sensor generally carries a load in the range of 100pf.
This expander allows for a larger picofarad load on the bus.
Sometimes these expanders are also used as voltage level shifters on the bus.
Jacob
1 Reply
May 12, 2016
11:41 AM
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May 12, 2016
11:41 AM
I2C busses are limited by their picofarad load. They generally max out at about 400pf. And each sensor generally carries a load in the range of 100pf.
This expander allows for a larger picofarad load on the bus.
Sometimes these expanders are also used as voltage level shifters on the bus.
Jacob