LM48511 Evaluation Board
User's Guide
National Semiconductor
Application Note 1922
Allan Soriano
November 5, 2008
Quick Start Guide
Apply a 3.0V to 5.5V power supply voltage to the VDD pin with
respect to the ground (GND) pin.
Set connectors SD_Amp, SS_En Enable, SD_Boost to High.
Set FB_SEL to Low (FB_SEL0) which boosts the regulator
output voltage PV1 to about 7.6V.
Apply a mono differential input signal into the Audio Input’s
two center pins of the 4-pin connector.
Apply power. Make measurements.
Introduction
To help the user investigate and evaluate the LM48511SQ
performance and capabilities, a fully populated demonstration
board was created. Please contact National Semiconductor
Corporation’s Audio Products Group for availability. This
board is shown in Figure 1. Connected to an external power
supply (3.0V
≤
VDD
≤
5.5V) and a signal source, the
LM48511SQ demonstration board easily exercises the
amplifier’s features.
30085503
FIGURE 1. Typical LM48511SQ Demonstration Board
© 2008 National Semiconductor Corporation
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www.national.com
LM48511 Evaluation Board User's Guide
AN-1922
