Microcontroller with ADC for Wifi module

L

libuz

New Member

• May 15, 2012

• #1

My project needs 8 ADCs with speed of few kilosamples/sec, to read signal and transfer using Wifi to a computer. I found RN-171 Wifi module. Can someone suggest me an ADC which can be connected to this module? The Wifi module has Tx and Rx pins to communicate with microcontroller.
Thanks

 

Sceadwian

Banned

• May 15, 2012

• #2

a 'few' isn't really a good spec. Exactly what would be an acceptable sampling rate and how much accuracy and precision do you need for the ADC? There are micro controllers that could do this without an external ADC if your requirements aren't to stringent.

 

Last edited: May 15, 2012

L

libuz

New Member

• May 16, 2012

• #3

I need to read 3 signals at same time. These signals have frequencies upto 400Hz. 10 bit resolution should be fine.

 

Sceadwian

Banned

• May 16, 2012

• #4

You'll get 10bits out of a micro controller ADC but they won't all be accurate, generally the best you can generally get is 8bits at any high reading rate, if you could clarify exactly what you're reading a little better it might help, if you just need to measure the frequency the bit depth is virtually irrelevant.

 

L

libuz

New Member

• May 21, 2012

• #5

I am using for EMG recording. I checked arduino, which has 10 bit resolution. What do u think about that?
Is there any such board with built in WiFi module?

 

Sceadwian

Banned

• May 21, 2012

• #6

To get all 10 of those bits you need to jump through some hoops which include board layout considerations, the chip must be in sleep mode during the ADC conversion and the sampling rate can't be too high.

At decent sampling rates you can consider it an 8bit DAC, the last two bits are noise.