6 Configuration Selection

Choosing a gain configuration is a design decision that is dependent on a few key parameters:

  • Maximum input level
  • Frequency of the signal
  • Signal sensitivity
  • Source impedance
  • Gain accuracy

A full circuit analysis is required to find the best configuration, but Figure 6-1 shows a simplified example decision tree for DC signals. AC signals are more complex to analyze and require AC parameters specific to the device.

Figure 6-1. DC Gain Configuration Flowchart