Texas Instruments TPA102 MSOP - Manual (Page 14)

Quick Start List for Stand-Alone
2-4 Quick Start
2.3 Quick Start List for Stand-Alone
Follow these steps to use the TPA102 MSOP EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the TPA102
MSOP module header pins can be made via individual sockets,
wire-wrapping, or soldering to the pins, either on the top or the bottom of the
module circuit board. Numbered callouts for selected steps are shown in
Figure 2–2 and details appear in Chapter 3.
Figure 2–2. Quick Start Module Map
GND
Vo2
C3
IN2
GND
VDD GND
IN1
GND
U1†
R1
R2
C2
R5
S1
Shutdown
C4
Vo1
GND
C7
C1
TEXAS
INSTRUMENTS
SLOP125
TPA102 MSOP EVM
C5
R4
R3
6
2
4
4
5
6
† Due to the very small size of the MSOP IC package, the standard part number TPA102 is
replaced with the code TIAAC
- Power supply
1) Ensure that all external power sources are set to OFF.
2) Connect an external regulated power supply set to 5 V to the module VDD
and GND pins taking care to observe marked polarity.
- Inputs and outputs
3) Ensure that the signal source level is set to minimum.
4) Connect the audio source to the module IN1, IN2, and GND pins taking
care to observe marked polarity.
5) Connect the Shutdown pin to V
DD
through a normally open switch.
6) Connect 32-
Ω
headphones to the module V
O
1, V
O
2 pins through 33
µ
F
to 1000
µ
F output-coupling capacitors (figure 3 – 8) and return to the GND
pin, or
7) For line output, connections to the V
O
1 and V
O
2 pins must be made
through 33
µ
F to 1000
µ
F output-coupling capacitors and returned to
GND.
- Power-up
8) Verify correct voltage and input polarity and set the external power supply
to ON.
The EVM should begin operation.
9) Adjust the signal source level as needed.