Question about the analog input of "Arduino mega 2560 "

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?

class:
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

thank you(retrolefty)

are there datasheet for analog input?

class:
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.

Lefty

thanks

May this post enabling differential input for Arduino handy.. Differential Sensing with Arduino - Sensors - Arduino Forum