Ultra-Precision Signal Chains

Ultra-Precision Tech Notes

Most Helpful Tech Notes

Does picking an amplifier with high amplifier open-loop gain guarantee an equivalent level of gain linearity?

High amplifier open-loop gain is a good initial selection criterion for the highest accuracy circuits but isn’t enough by itself to guarantee the system will be linear to that extent. Open-loop gain is specified via a two-point measurement and doesn’t…
Easy Drive in SAR ADCs - Signal chain design advantages

Q: I keep seeing the term "Easy Drive" on newer SAR ADCs from Analog Devices. What are the advantages of this new architecture and how does this help with signal chain design? A: Newer devices like the AD4020 , AD7768-1 , and AD4630-24 utilize…
How can I minimize or eliminate error at the output due to resistor matching?

Q: I am using LTC6363 to convert my single-ended signal to the differential signal that my ADC requires. I have the amplifier configured in a gain of 1 and have discovered that the gain-setting resistors dominate my CMRR performance. Because of the…
How do I pick an appropriate voltage reference for my high precision measurement system?

A voltage reference’s main purpose is to provide a known output, and accuracy and stability are the most important aspects of this. ADI’s article “ March 2009 - How to Choose a Voltage Reference (analog.com) ” describes different types of references and…
How does my voltage reference noise impact my overall system noise?

Reference noise can be a main contributor to overall system noise. Analog Dialogue article Why Does Voltage Reference Noise Matter? (analog.com) provides an in-depth look at how the reference contributes noise and some approaches to filtering and minimizing…