User manual

Evaluation Kit Hardware
SAM4S-EK2 User Guide 4-10
11176A–ATARM–24-Sep-12
Figure 4-12. Microphone Input
4.3.10.2 Headphone Output
The SAM4S-EK2 evaluation kit supports mono/stereo audio playback driven by a TPA0223 audio ampli-
fier connected to two DAC channels of the microcontroller.
The TPA0223 is a 2W mono Bridge-Tied-Load (BTL) amplifier designed to drive speakers with as low as
4 Ohm impedance. The amplifier can be reconfigured on the fly to drive two stereo Single-Ended (SE)
signals into head phones.
Figure 4-13. Headphone Output
R7 5 47K
C7 4
100nF
C7 7
4.7uF
R8 3
0R
R9 1
0R
AGND
DG ND
JP14 and JP15 should be set
or removed together
R9 0
100K
R7 6 47K
AVDD
R9 3
100K
JP 15
Header2
C7 2
1nF
AGND AG ND
VCC33
C6 9
1nF
AGND
R7 7
470R
PB0
R8 6
47K
AGND
MIC1
SVB6050
12
MN11
TS922
IN1-
2
IN1+
3
OUT2
7
IN2-
6
IN2+
5
GND
4
VCC
8
OUT1
1
FB 2
BN03K314S300R
AVDD
R7 9
1K
JP14 Header2
R8 7
47K
R8 1
100R
AVDD
AUDIO IN
C7 1
22nF
AGND
R8 2
1K
R7 8
1K
R8 0
1K
R8 4
1K
R8 5
1K
R8 8
470R
C6 2
100pF
C6 3
22uF
C7 3
22uF
C6 7
1uF
C6 8
1uF
AGND
AGNDAGND
R100 33 K
J1 1
Phonejack Stereo 3.5
5
4
3
2
1
+
C83 220uF-TAN-6.3V
+
C81 220uF-TAN-6.3V
R9 7 1K
R9 5 1K
R104 47 K
C8 6 0.4 7uF
AGND
AGND
AUDIO OUT
C7 9
1uF
JP 29
1
2
3
AUDIO_OUTL
C8 2
100nF
DG ND
TP 12
Test Pad SQ-40TH
R105 33 K
C8 4 0.4 7uF
C8 8 0.4 7uF
MN13
TPA0223DGQ
VDD
3
RIN
5
MONO-IN
1
LIN
9
LO/MO-
10
RO /MO+
6
ST/MN
7
SHUTD0WN
2
BYPASS
4
GND
8
PAD
11
+
C8 0
10uF
C8 5 0.4 7uF
JP 17 He ader2
JP 19 He ader2
VDD_AMP
R103 10 0K
R101 10 0K R102 10 0K
AGND
JP 20
Header2
AGND
AGND
VDD_AMP
PB13
C8 7
1uF
J1 0
1
2
+5V
R9 8 33 K
AGND
R9 9 47 K
FB 3
BN03K314S300R
VCC33
AGND