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What is programmable op amp?
Op amps are available that can be set for predetermined performance levels. If the device needs to be very fast, the designer can adjust an external voltage or resistance and optimize the device for speed. Because of their ability to change operational parameters, these devices are commonly called programmable op amps.
What is a VGA distribution amplifier?
Distribute VGA input signals to multiple VGA outputs.
How do you increase the dynamic range of ADC?
There are a number of other ways to increase the dynamic range of an ADC, such as operating multiple ADCs in parallel and digital postprocessing the output to get the averaged result or using programmable gain amplifiers.
Which is better a PGA or a capacitive gain amplifier?
Patented ADI capacitive programmable gain amplifiers (PGAs) offer better performance than traditional resistive PGAs, including higher common-mode voltage rejection of analog input signals.
Why do we need programmable gain instrumentation amplifiers?
Programmable gain instrumentation amplifiers are a critical component in the data acquisition space, enabling good SNR performance, even with varying sensor sensitivities. The use of integrated PGIAs allows for shorter design time and better overall dc and ac performance for the front end.
How is an instrumentation amplifier used in pgias?
One of the approaches commonly used in designing discrete PGIAs is to use an instrumentation amplifier with the desired input characteristics, for example, the low noise of the AD8421, accompanied with a multiplexer to switch in the gain resistor to vary the gains. Figure 1. AD8421 with mux for switched-in gain.
How to optimize gain in an AC amplifier?
On-chip trimming of these resistor arrays can be done to optimize gain, CMRR, and offsets, resulting in good overall dc performance. Design techniques can also be utilized for compact IC layout to minimize parasitics, as well as provide excellent matching, resulting in good ac performance.