Question about AD8495 connection

Hi Kazu,

Thank you for reaching out. To further understand the problem and be able to formulate the correct recommendations, we would like to know more about the intended applications and design parameters.

Please share the following items:

• What are the values of the supplies? +Vs (Pin7), -Vs (pin3), REF (pin2) of the AD8495
• Are you using a single-supply or dual-supply configuration?

If there is an electrical connection through a grounded or exposed tip, the resistor value is large enough that any current from the measurement tip to the ground is minimal, preventing measurement errors.

Hence, It is always recommended that the thermocouple be connected to the ground through a 100 kΩ to 1 MΩ resistor placed at the amplifier’s negative (inverting) input.

Lastly, The AD8495 inputs require only one (1) ground connection and should be near the inverting input terminal; additional ground connections can form ground loops and possibly the amplifier can’t read the small TCs signal.

Regards,

Hello,

Thank you for the reply.

 +Vs = 12V, -Vs=GND, REF=GND, Using single-supply configuration.

Currently, +IN pin is connected to GND for further evaluation.

Best Regards,

Kazu

Hi Kazu Thank you for your response, for the part to function properly and be able to meet the specs in the Datasheet; it is recommended to put the inverting input terminal to ground through a resistor (100 kΩ to 1 MΩ).

Best regards