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Use Case
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
Figure 16
and
Figure 17
Figure 16. Echo Analog Waveform Output (Channel1), Drive voltage (Channel 2)
20
PGA450Q1EVM User's Guide
for the captured waveforms.
Copyright © 2012–2015, Texas Instruments Incorporated
SLDU007C – March 2012 – Revised November 2015
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