3.2.1 Overview

The Xplained Pro Analog Module (XAM) extends the embedded debugger with high dynamic range current measurement. This enables power profiling of the target system.

The XAM consists of:

• Calibration circuitry
• Voltage reference
• Analog frontend
  • Shunt resistors with a range selection switch
  • Pre-amplifier
  • Two active filters with gain
• Control MCU
  • Analog to digital converter
  • Signal processing
  • Control/communication interface to the EDBG

The current measurement frontend is a high side shunt measurement with a pre-amplifier and a second active filter stage with gain. The wide dynamic range is achieved by four measurement ranges which are defined by two shunts and the two parallel second stage active filters with gain.