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Description
1-3
Introduction
1.2 Description
The TPA112 MSOP audio power amplifier evaluation module is a complete,
low-power stereo audio power amplifier for high-fidelity line-level output,
headphone, and small speaker applications. It consists of the TI TPA112
150-mW stereo audio power amplifier IC in a very small MSOP package, along
with a small number of other parts mounted on a circuit board that is
approximately one and a quarter inches square (Figure 1–1).
Figure 1–1. The TI TPA112 Audio Amplifier Evaluation Module
GND
Vo2
IN2–
IN2+
Vdd GND
IN1+
U2
C7
R9
C1
C5
Vo1
GND
TEXAS
INSTRUMENTS
SLOP126
TPA112 MSOP EVM
C6
R10
R8
R7C4
R1
R2
R3
R4
C2
R5
R6
C3
JP1
IN1–
+
†
Due to the very small size of the MSOP IC package, the standard part number TPA112 is replaced with the code TIAAD
Single in-line header pins are mounted to the underside of the module circuit
board to allow the EVM to either be plugged into the TI plug-n-play audio
amplifier evaluation platform, or to be wired directly into existing circuits and
equipment when used stand-alone.
The platform has room for a single TPA112 evaluation module. It is a
convenient vehicle for demonstrating TI’s audio power amplifier and related
evaluation modules. The EVMs simply plug into the platform, which
automatically provides power to the modules, interconnects them correctly,
and connects them to a versatile array of standard audio input and output jacks
and connectors. Easy-to-use configuration controls allow the platform and
EVMs to quickly model many possible end-equipment configurations.
There is nothing to build, nothing to solder, and nothing but the speakers
included with the platform to hook up.
1.3 TPA112 MSOP EVM Specifications
Supply voltage range, V
DD
2.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, I
DD
160 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power, P
O
:8 Ω, V
DD
=5 V 150 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, V
I
V
DD
+ 0.3 Vpp, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, R
L
8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .