If I set the ADC to use the 1.2 V internal reference, will I damage the Teensy if I try to read say 3V. I understand that the reading will saturate and be incorrect for voltages above ~1.1, but will it cause damage?
The reason I ask is that I have an analog sensor (0 to 0.5V) that I would like to measure over several decades. At the lower end of the scale, I run out of resolution and have a noisy signal. I am thinking of putting the raw signal on A0 and amplifying by ~100x and measuring on A1. For 3.3V supply rails, the opamp output will saturate at ~3.3 V for a high signal. During measurement, I can choose either A0 or A1 to give the 'best' data. The only problem is that A1 will have saturated voltage much of the time. Greater than 1.1 V but less than 3.3V
For this specific question I am using a Teensy 3.5 with an external amplifier but I have also wondered about the programmable gain on a Teensy 3.2. Is it 'bad' to have a 16x gain and then feed in e.g. 0.5V. The data will be rubbish, but does it damage anything?
I have searched. There are comments on the net about keeping the signal below 1.1V, but it's not clear if there is damage above 1.1V or just unreliable data.
The reason I ask is that I have an analog sensor (0 to 0.5V) that I would like to measure over several decades. At the lower end of the scale, I run out of resolution and have a noisy signal. I am thinking of putting the raw signal on A0 and amplifying by ~100x and measuring on A1. For 3.3V supply rails, the opamp output will saturate at ~3.3 V for a high signal. During measurement, I can choose either A0 or A1 to give the 'best' data. The only problem is that A1 will have saturated voltage much of the time. Greater than 1.1 V but less than 3.3V
For this specific question I am using a Teensy 3.5 with an external amplifier but I have also wondered about the programmable gain on a Teensy 3.2. Is it 'bad' to have a 16x gain and then feed in e.g. 0.5V. The data will be rubbish, but does it damage anything?
I have searched. There are comments on the net about keeping the signal below 1.1V, but it's not clear if there is damage above 1.1V or just unreliable data.
