Spikes in Analogue output

[umesh49]

Hi,
I have designed a circuit which is generating an analogue output of 5V range. This is three wire board with VCC, GND and output. If I will moniter the output on board, it is having noise level of less than 10mV, but our requirement is to have a 1 meter cable for VCC, GND and output line. While reading the output after having this cable I observed 70mV of noise, is there any way I can reduce this noise level.

Regards
Umesh

 

[Genovator]

Noise are generally reduced by decoupling capacitors and small electrolytic capacitors connecting at the end if wire. There are some low noise co-axial cables available in market.

 

[crutschow]

What is the maximum frequency of the signal?

You might try shielding the cable if it is not already.