Questions about the Driver — HIGH RESOLUTION ADC USING MICROCHIP MCP342X

The website shows the Programmable data rate options for 18bit resolution is 3.75 SPS.
Does it mean the sampling time is limited to 1/3.75 seconds?
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en536354

Thanks

It will help much if you add a link please.

oh,
http://code.tinyclr.com/project/369/high-resolution-adc-using-microchip-mcp342x/

18bit is the resolution, the accuracy. Normally, ADCs are capable of thousands of samples per second.

But I don’t real understand the SPS mean

Programmable data rate options

  • 3.75 SPS (18 bits)
  • 15 SPS (16 bits)
  • 60 SPS (14 bits)
  • 240 SPS (12 bits)

The lower the resolution the faster the sampleing but 240SPS doesn’t sound right! It should be much higher! If it is true, this is the slowest ADC I have seen in my life.

I just check the datasheet and you are correct. It is that slow!

If you can go SPI instead of I2C then I would suggest:
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en024598

It is 60 samples per second and 22bit resolution…