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Questions tagged [pga]

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ADS1115 PGA Questions

I have two similar questions regarding the PGA of the ADS1115. Datasheet Say I have the PGA set to 2, so the max voltage read is 2.048V. If I apply 3V to AIN0, I assume it will give me the max ...
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Shifting AC Signal for ADC

I have AC signal that varies from 50mV (pk-pk) to 420mV (pk-pk). I am trying to use a PGA (programmable gain amplifier) to amplifiy the signal so that it can be sent to the ADC in an ATmega328P. The ...
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pga gain formula

Background: I am dealing with reverse engineering a software. And trying to understand a formula in the code. I found a formula that reads: ...
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About nonlinearity of PGA (Programmable Gain Amplifier)

I find there are at least two methods to specify the nonlinearity of PGA. For PGA204, it is given as '% of FSR', but for PGA280, it was given as 'ppm'. It seems the latter are more common. Then why ...
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Programmable gain instrumentation amplifier with R-2R ladder and analog multiplexer

I want to build a programmable gain instrumentation amplifier with power of two possible gains (1x, 2x, 4x, 8x...). Is there a way to use a R-2R resistor ladder and an analog multiplexer in order to ...
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Digital GND of PGA204

I'm using TI's PGA chip PGA204. It has a DGND and an AGND. And it states: Digital ground can be connected to any potential from the V– power supply to 4V less than V+. Digital ground is normally ...