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Author Topic: Question about the analog input of "Arduino mega 2560 "  (Read 1003 times)
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Hi guys

i want to use "Arduino mega 2560 " as data acquisition,
but the analog signal is bipolar(ECG signal)

so can i direct measure this signal or i need signal conditioning circuit?
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Left Coast, CA (USA)
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Hi guys

i want to use "Arduino mega 2560 " as data acquisition,
but the analog signal is bipolar(ECG signal)

so can i direct measure this signal or i need signal conditioning circuit?

You will need some form of external signal conditioning as the arduino analog inputs cannot safety handle negative voltages (below -0.5vdc) or positive voltages about Vcc + 0.5vdc. This same voltage limit applies to the digital input pins also.

Lefty
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thank you(retrolefty)

are there datasheet for analog input?
« Last Edit: February 05, 2013, 11:56:41 am by class » Logged

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thank you(retrolefty)

are there datasheet for analog input?

Well there is a Atmel datasheet avalible that covers the complete mega2560 chip that has sections covering the build in ADC.
http://www.atmel.com/images/doc2549.pdf
Lefty
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thanks
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May this post enabling differential input for Arduino handy.. http://arduino.cc/forum/index.php/topic,147830.msg1110852.html#msg1110852
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