User's Guide
SNAA064C – November 2008 – Revised May 2013
AN-1922 LM48511 Evaluation Board
1
Introduction
To help the user investigate and evaluate the LM48511SQ performance and capabilities, a fully populated
demonstration board was created. This board is shown in
Figure 1
. Connected to an external power
supply (3.0V
≤
V
DD
≤
5.5V) and a signal source, the LM48511SQ demonstration board easily exercises the
amplifier’s features.
Figure 1. Typical LM48511SQ Demonstration Board
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Quick Start Guide
Step 1. Apply a 3.0V to 5.5V power supply voltage to the VDD pin with respect to the ground (GND) pin.
Step 2. Set connectors SD_Amp, SS_En Enable, SD_Boost to High. Set FB_SEL to Low which boosts
the regulator output voltage PV1 to about 7.6V.
Step 3. Apply a mono differential input signal into the Audio Input’s two center pins of the 4-pin connector.
Step 4. Apply power. Make measurements.
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1
SNAA064C – November 2008 – Revised May 2013
AN-1922 LM48511 Evaluation Board
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