PMODAMP2 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – The PmodAMP2 amplifies low power audio signals to drive a monophonic output.

PmodAMP2™
Reference Manual
Revision: August 2, 2012
Note: This document applies to REV B of the board.
Overview
The PmodAMP2 amplifies low power audio
signals to drive a monophonic output. The
module features a digital gain select that
allows output at 6 dB and 12 dB with pop-and-
click suppression. A Digilent 6-pin connector
provides the audio input to the module and a
1/8-inch mono jack supplies the speaker
output.
For customer convenience, Digilent has an
inexpensive speaker and enclosure available
for sale that is suitable for use with the
PmodAMP2. Also, unlike most Digilent Pmod
modules that accept only digital inputs, the
PmodAMP2 accepts analog inputs and pulse
width modulated digital inputs.
Inputs and Outputs (I/O)
The PmodAMP2 accepts either digital or
analog inputs at a voltage range of 0-Vcc.
Typically a Digilent system board supplies
power to the module at 3.3V, though the
maximum supply voltage is 5.0V. The
connector J1 provides the audio input, gain
select, shutdown select, and power. (See
figure 1)
There are several suitable inputs for the
PmodAMP2. The typical input is a pulse width
modulated (PWM) signal produced by a digital
output from a Digilent programmable logic
system board or microcontroller board. The low
pass filter on the input acts as a reconstruction
filter to convert the PWM digital signal into an
analog voltage on the amplifier input.
The PmodAMP2 also accepts analog inputs
with an input voltage range of 0-Vcc. These
inputs will often be from an analog to digital
converter module, like the Digilent PmodDA1
or PmodDA2. The output of a digital to analog
Doc: 502-233
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Features Include:
• Analog Devices SSM2377: Filterless,
High Efficiency, Mono 2.5 Watt Class-D
Audio Amplifier
• Digital gain select
• Pop –and-click suppression
• Micropower shutdown mode
• 1/8-inch mono speaker jack
• A 6-pin header for input
• 2.5V – 5V operating voltage
Figure 1
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