Use Case
20
SLDU007C – March 2012 – Revised November 2015
Copyright © 2012–2015, Texas Instruments Incorporated
PGA450Q1EVM User’s Guide
11.2 Monitoring the Signal Path
The PGA450-Q1 device has two useful test modes that allow users to quickly observe the echo signal as
an amplified analog signal or from a DAC output which converts a digitally filtered echo signal. In the
Evaluation
tab, quick-access buttons
Amplifier Output (unfiltered)
and
Datapath Output (filtered)
are
available. The signal is viewable on the DACO pin. Only one mode can be selected at a time. See
and
for the captured waveforms.
Figure 16. Echo Analog Waveform Output (Channel1), Drive voltage (Channel 2)
