User's Guide
SNAA052A – February 2008 – Revised May 2013
AN-1768 LME49600 Headphone Amplifier
Evaluation Board
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Quick Start Guide
1. Apply a ±2.5V to ±17V power supply’s voltage to the respective “V+”, “GND” and “V–” pins on JU19.
2. Apply a stereo audio signal to the RCA jacks J1 (Right) and J2 (Left) or jumpers JU1 (Right) and JU17
(Left), observing the signal input pin and the ground (GND) pin. Though not typically installed, a stereo
signal can also be applied to headphone jack HPJ1.
3. Connect a load to JU14 (Left) and another load to JU15 (Right), observing the signal output pin and
the ground (GND) pin. The stereo signal output is also available on the 1/8” stereo headphone jack
located in the board's “OUTPUT” section.
4. Use VR1 to control the output signal amplitude.
5. Apply power. Make measurements. Plug in a pair of headphones. Enjoy.
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Introduction
To help the user investigate and evaluate the LME49600's performance and capabilities, a fully populated
demonstration board was created. Please click
for availability. This board is shown in
Connected to an external power supply (±2.5V to ±17V) and a signal source. The LME49600
demonstration board easily demonstrates the amplifier's features.
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SNAA052A – February 2008 – Revised May 2013
AN-1768 LME49600 Headphone Amplifier Evaluation Board
Copyright © 2008–2013, Texas Instruments Incorporated
