I’m working with an analog sensor, and it says “when measuring [the output] directly,always use a unity gain buffer”. Does the argon have these onboard the analog inputs, or do I need to supply one externally?
@adam.rob.carter, usually a unity gain buffer is used to manage the impedance of the sensor or the ADC input of the MCU. The Argon does not have a unity gain buffer onboard. This is simply an op-amp wired for a gain of 1.
Can you provide a link to your sensor so we can look at its output characteristics?
thanks for quick reply. The sensor is this gas sensor (the Vref and Vtemp outputs). The datasheet says
High impedance output requires a buffer to connect to any measurement device.
@adam.rob.carter the impedance warning only seems to apply to the Vref and Vtemp outputs. If you don’t need these, it looks like you can use the Vgas output directly.
Yeah I got that, but what if I do?