CN0396 AlphaSenseCOH-A2 LTSPICE model

Hello Kokubo-san,

Is this the same question as:

https://ez.analog.com/circuits_from_the_lab/f/q-a/539161/cn0396-ga-sensor-ltspice-model/400198#400198

?

You will need to contact the manufacturer of the AlphaSense COH-A2 for any details beyond what is listed in their datasheet - we (ADI) cannot guess about exactly how the sensor works. This question should be answered in terms of the AlphaSense recommendations - CN0396 follows the circuit topology recommended in Figure 1 here:

http://www.alphasense.com/WEB1213/wp-content/uploads/2013/07/AAN_105-03.pdf

Note that the Alphasense document allows for modification of R1, R2, C1, C2 values.

We are also following the recommendation on page 2:

"It is best to allow ±1.1V swing on IC2 (plus any imposed bias voltage)" We are operating the ADA4528-1 on a 3.3V supply, and the bias voltage is 1.2V (supplied by ADR3412 reference.) The ADA4528-1 is rail-to-rail out, with a worst-case headroom requirement of 60mV at the negative supply (ground) and 40mV to the positive supply (3.3V.)

-Mark

Hello Kokubo-san,

Is this the same question as:

https://ez.analog.com/circuits_from_the_lab/f/q-a/539161/cn0396-ga-sensor-ltspice-model/400198#400198

?

You will need to contact the manufacturer of the AlphaSense COH-A2 for any details beyond what is listed in their datasheet - we (ADI) cannot guess about exactly how the sensor works. This question should be answered in terms of the AlphaSense recommendations - CN0396 follows the circuit topology recommended in Figure 1 here:

http://www.alphasense.com/WEB1213/wp-content/uploads/2013/07/AAN_105-03.pdf

Note that the Alphasense document allows for modification of R1, R2, C1, C2 values.

We are also following the recommendation on page 2:

"It is best to allow ±1.1V swing on IC2 (plus any imposed bias voltage)" We are operating the ADA4528-1 on a 3.3V supply, and the bias voltage is 1.2V (supplied by ADR3412 reference.) The ADA4528-1 is rail-to-rail out, with a worst-case headroom requirement of 60mV at the negative supply (ground) and 40mV to the positive supply (3.3V.)

-Mark

Hi Mark san

Yes. It is same customer request.

Thank you for good advice.

I will check AAN-105-03.

I close this question.

Best regards

N.Kokubo