What are the Differences Between Unbalanced, Balanced, Isolated and Differential Input?

Resources:

Input Type Comparison.pptx

What is the difference between balanced and unbalanced inputs?

Unbalanced, non-isolated inputs (oscilloscope) are single-ended amplifiers. These inputs are suitable for measurements where common mode voltages are extremely small or zero and measurements are referenced to GND.

Unbalanced, isolated inputs are single-ended, floating common amplifiers. These inputs are suitable for off-ground measurements up to the breakdown voltage of the isolation barrier. The common noise rejection ratio is modest at low frequencies.

Balanced, differential inputs are non-isolated and exhibit the best common noise rejection ratio at low and high frequencies.

Please download and refer to the attached PowerPoint for more information on input types.

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