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PSoC 5, 3 & 1 MCU

Anonymous
Not applicable

I have an off-chip filter and pre-amp circuit (see figure) that I would like to interface with the PSoC 3/5's ADC.  This circuit buffers, bandpass filters (500 Hz–5 kHz by a four-pole multiple feedback Butterworth filter) and amplifies (1500×) biological signals (microvolt amplitudes).

   

Could I use PSoC's components (opamp, etc) to save space on my final board layout? This will be a low power (3V or less) design requiring 2-3 day battery life.

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Anonymous
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Hi Jram,

   

 

   

PSoC 3/5 has 4 opamps and 4 SC/CT (Switched Capacitance / Continuous Time) blocks.

   

The circuit which you are intending to build can be implemented on PSoC using the 4 opamps. The external components (resistors and capacitors) can be used as required.

   

 

   

The buffer (such as voltage follower) can be implemented using opamps or SC/CT blocks.

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