2 Elizabeth Drive Chelmsford, MA 01824 PH: 1-800-ANALOGD Sheet of Rev Date Title Size C Board No. 1 A 2 3 4 1 2 3 4 B C D A B C D 1.2 5 A0974-2017 A2B Amplifier Board 12/12/17 Title A2B Amplifier Board Schematic A0974-2017 1
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2 Elizabeth Drive
Chelmsford, MA 01824
PH: 1-800-ANALOGD
Sheet of
Rev
Date
Title
SizeC
Board No.
1
A
2
3
4
1
2
3
4
B C D
A B C D
1.25
A0974-2017
A2B Amplifier Board
12/12/17
Title
A2B Amplifier Board SchematicA0974-2017
1
2 Elizabeth Drive
Chelmsford, MA 01824
PH: 1-800-ANALOGD
Sheet of
Rev
Date
Title
SizeC
Board No.
1
A
2
3
4
1
2
3
4
B C D
A B C D
1.25
A0974-2017
A2B Amplifier Board
12/12/17
SSM3582
GND
C90.22UF0805
VALUEC12
0805
OUT1L+ OUT1L-
C130.22UF0805
C140.22UF0805
OUT1R+ OUT1R-
SCL_SSMSDA_SSM
FSYNCDTX0BLCK
PVDD
C150.1UF0402
C1610UF1206
1.8V
5V
AVDD
AVDD
R100805
R200805
R300805
R400805
DVDD
DNP DNP
DVDD
1.8V
5V
08050.22UFC17
08050.22UFC18
08050.22UFC19
08050.22UFC20
04020.1UFC21
120610UFC22
R500805
R600805
R700805
R800805DNP
OUT2L-OUT2L+
OUT2R-OUT2R+
SCL_SSMSDA_SSM
FSYNCDTX1BLCK
PVDD
DVDD
GND
AVDD
AVDD
DVDD
DNP
AMP 1
AMP 2
C1220PF
0402
C2220PF
0402
OUT1L+
OUT1L-
C3220PF
0402
C4220PF
0402
OUT1R+
OUT1R-
C5220PF
0402
C6220PF
0402
C7220PF
0402
C8220PF
0402
OUT2L+
OUT2L-
OUT2R+
OUT2R-
SCL
SDA
SCL_SSM
SDA_SSM
P11
2
1
5.08MM
P12
2
1
5.08MM
P13
2
1
5.08MM
P14
2
1
5.08MM
AMP1 LEFT OUT
AMP1 RIGHT OUT/MONO
AMP2 LEFT OUT
AMP2 RIGHT OUT/MONO
0.1UF0402
C84
04020.1UFC85
JP6
2
1
IDC
JP7
2
1
IDC
JP8
2
1
IDC
JP9
2
1
IDC
R5501206
R5601206
R5701206
R5801206
OUT1+ MONO OUT1- MONO
R5901206
R6001206
R6101206
R6201206
OUT2+ MONO OUT2- MONO
04020.1UFC87
04020.1UFC88
R6401206
R6501206
R6601206
R6701206DNP
R6801206
R6901206
R7001206
R7101206
R7201206
R7301206
R7401206
R7501206
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
R7601206
R7701206
R7801206
R7901206
R8001206
R8101206
R8201206
R8301206
04020.1UFC89
10UFC90
1206
04020.1UFC91
10UFC92
1206
04020.1UFC93
10UFC94
1206
04020.1UFC95
10UFC96
1206
GND
GND
GND
PVDD
PVDD
PVDD
PVDD
PVDD
PGND1PGND2AVDD_ENSCLSDAFSYNCSDATABLCKPGND3PGND4
BS
TR+
OU
TR+
_1
OU
TR+
_2
PVD
D1
PVD
D2
PVD
D3
PVD
D4
OU
TR-
_1
OU
TR-
_2
BS
TR-
PGND5PGND6
DVDD_ENAVDDAGND
ADDR0ADDR1
DVDDPGND7PGND8
BS
TL-
OU
TL-
_1
OU
TL-
_2
PVD
D5
PVD
D6
PVD
D7
PVD
D8
OU
TL+
_1
OU
TL+
_2
BS
TL+
PAD
U5
41
40
39
38
37
36
35
34
33
32
31
30292827262524232221
20
19
18
17
16
15
14
13
12
11
10987654321
SSM3582ACPZLFCSP40
PGND1PGND2AVDD_ENSCLSDAFSYNCSDATABLCKPGND3PGND4
BS
TR+
OU
TR+
_1
OU
TR+
_2
PVD
D1
PVD
D2
PVD
D3
PVD
D4
OU
TR-
_1
OU
TR-
_2
BS
TR-
PGND5PGND6
DVDD_ENAVDDAGND
ADDR0ADDR1
DVDDPGND7PGND8
BS
TL-
OU
TL-
_1
OU
TL-
_2
PVD
D5
PVD
D6
PVD
D7
PVD
D8
OU
TL+
_1
OU
TL+
_2
BS
TL+
PAD
U6
41
40
39
38
37
36
35
34
33
32
31
30292827262524232221
20
19
18
17
16
15
14
13
12
11
10987654321
SSM3582ACPZLFCSP40
12060R53
12060R54
2
2 Elizabeth Drive
Chelmsford, MA 01824
PH: 1-800-ANALOGD
Sheet of
Rev
Date
Title
SizeC
Board No.
1
A
2
3
4
1
2
3
4
B C D
A B C D
1.25
A0974-2017
A2B Amplifier Board
12/12/17
Switches/USBi/TDM
Sigma Studio
P1
IDC
5
9
87
6
43
2
10
1SCL
SDA
YELLOWLED1
3.3V
3.3V
040233R41
04021UFC81
04021UFC82
04020.01UFC83
74LVC14A
U1
21
040233R47
74LVC14A
U1
43
PB2
MOMENTARYSW1
PB1
MOMENTARYSW2
U1
74LVC14A
65
89
U1
74LVC14A
74LVC14A
1011
U1
040210KR49
U1
74LVC14A
1213
IO1
IO2
1A1
1A2
1A3
1A4
2A1
2A2
2A3
2A4
2Y3
2Y4
2Y2
2Y1
1Y4
1Y3
1Y2
1Y1
OE1
OE2
U2
19
1
18
16
14
12
9
7
3
5
17
15
13
11
8
6
4
2
74LVX244MSOIC20
FSYNC
BLCK
B_FSYNC
B_BLCK
C800.1UF0402
3.3V
3.3V
WP
SCL
SDA
A0
A2
VCC
A1
VSS
U9
4
2
8
3
1
5
6
7
24FC256I/MS
R5200402
3.3V
C860.1UF0402
SCL
SDA
B_DTX1
B_DTX0
P16
4
2
3
1
IDC
3.3V
SCL
SDA
I2C
DTX0
DTX1
P2
11
9
1
3
5
7
4
2
6
10
8
12
IDC
Buffered TDM
JP5
87
1
3
5
4
2
6
IDC
PDM MIC
DRX0
DRX1
BLCK
IDC
P15
TDM
12
8
10
6
2
4
7
5
3
1
9
11
DTX0
DTX1
DRX0
DRX1
FSYNC
BLCK
3
R441000402
R4310K0402
R4610K0402
R451000402
0402100R85
B_DRX0
B_DRX1
DRX0
DRX1
R38330.00402
3.3V
3.3V
IO0
JP11
3
5
4
2
6
IDC
GPIO3.3V
3.3V
LED2YELLOW
R3910K0402
R401000402
R42330.00402
IO7
2 Elizabeth Drive
Chelmsford, MA 01824
PH: 1-800-ANALOGD
Sheet of
Rev
Date
Title
SizeC
Board No.
1
A
2
3
4
1
2
3
4
B C D
A B C D
A2B Master/Slave Node
12/12/17
A2B Amplifier Board
A0974-2017
5
1.2
3.3V
TWI Address 110100yx
x for bit 0 is the R/W bit. Read - 1, Write - 0
y for bit 1 is the M/S bit. Master - 0, Slave - 1
SDA
SCL
C624.7UF
3.3V
C630.1UF
BLCK
FSYNC
0.1UFC23 C24
10UF
0.1UFC25
0.1UFC26
FER11000
1000FER2
Towards Master
0.01UFC27
0.01UFC28
0.1UFC29
0.47UFC30
4.7UFC31
0.01UFC32C33
0.1UF
30VD2
4.7UFC34
FER31000
1000FER4
0.033UFC35
0.1UFC36 0.01UF
C37
0.01UFC38
Towards Slave
R111.0K
3.3KR12
30VD4
120.0R13
120.0R14
120.0R15
120.0R16
10KR10
10KR9
0402 0805
0402 0402
0402
0402
0402
04020402
04020402
0402
0402
04020402
0402
0805 0805
0402
1210
0402
1210
1210
0603
1210
1206
04020.033UFC39
04020.033UFC40
C410.033UF0402
04020.033UFC42
2
1 Q1BSS308PE
33300PFC43
0603
R1733.0K0402
C440.015UF0402
0.033UFC45
0402
R18
040210K10K
0402
R19
D3ZHCS400
2
1
P4
2
1
P5
8.5V
R20 330402
040233R21
R22 330402
R23 330402
FER11
1 4
32
2600
FER12
1 4
32
2600
1000FER5
1000FER6
1000FER7
1000FER8
C464.7UF0805
IO0
IO1
IO2
IO7
SLAVE
MASTER
C470.33UF0603
C480.33UF0603
C4912PF0402
040212PFC50
C5127PF0402
C5227PF0402
C5327PF0402
C5427PF0402
L9180nH
0402
L10180nH
0402
L11180nH
0402
L12180nH
0402
C550.1UF0402DNP
C560.1UF0402DNP
C570.1UF0402DNP
C580.1UF0402
C590.1UF0402
C600.1UF0402DNP
DNP
DNP
R241.0K0402
C614.7UF0805
R251.01206
040233R26
040233R27
R282.2K0402
R292.2K0402
3.3V
DTX0
DTX1
DRX0
DRX1
4
ADR1/IO1
ADR2/IO2
IOVD
D
BCLK
SYNC
DTX0/IO3
VIN
SENSE
SWP
VSSN
BTR
XVD
D
BP
VSS
1
BCM
BN
VOU
T1
IRQ/IO0
VSS
2
PLL
VDD
DTX1/IO4
DRX0/IO5
DRX1/IO6
IO7
ACM
AN
VOU
T2
SDA
AP
DVD
D1
SCL ATR
XVD
D
DVD
D2
VSS
3
U4
33
3 20
4
2
19
5
29
18
17
16
15
14
13
1
31
6
32
23
24
25
22
21
26
27
28
30
12
11
10
9
8
7
AD2428LFCSP32
2 Elizabeth Drive
Chelmsford, MA 01824
PH: 1-800-ANALOGD
Sheet of
Rev
Date
Title
SizeC
Board No.
1
A
2
3
4
1
2
3
4
B C D
A B C D
1.25
A0974-2017
A2B Amplifier Board
12/12/17
A2B Power
SHGND
SHGND
F23A
D6MBRS540T3G
4
1
3
2
FER13190
C781000PF1206
D1GSOT12
FER9600
FER10600
C791000PF1206
U8
4
2
8
3
1
5
6
7 PG
GND2
EN
VOUT
GND1
VIN
ADJ
NC
ADP7104ACPZ
C641UF0603
R30100K0402
R3161.9K0603
R3210.2K0402
R3310.0K0603
C650.22UF0805
8.5V12V
P3
2
3
1
PWR
12V
D5MBRS540T3G
C6647UF1210
3.3V
C674.7UF1206
C681UF0805
R3418.2K0402
R361.0M0402
C690.1UF0402
C7022UF1210
L132.2UH
C7110PF0402
R37100.0K0402
C720.01UF0805
5V
TP1
TP2
TP3
12V
0402187.0KR35
U3
11
6
7
8
9
10
5
4
3
2
1BST
SW
INTVcc
RT
SYNC
EN/VU
Vin
PG
TR/SS
FB
GNDLT8609MSOP10
INPUT OUTPUT
GND
VR1
1
23
ADP3339AKCZ-3.3SOT-223
INPUT OUTPUT
GND
VR2
1
23
ADP3338AKCZ-1.8SOT-223
5V
5V
3.3V
1.8V
C731UF0805
C741UF0805
C751UF0805
C761UF0805
P10
2
1
5.08MM
External PowerF18A
C7710UF1210
CT1470UF
CT2470UF
R6301206
12V
PVDD
Place CT1 near AMP1 and CT2 near AMP2
PVDD
5
0402330.0R84
POWERGREENLED3
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