Texas Instruments TAS2770 User Manual
User's Guide
SLOU497–October 2017
TAS2770 Stereo Evaluation Module
This user’s guide describes the characteristics, operation, and use of the TAS2770EVM-STEREO
Reference Board. A complete schematic diagram, printed-circuit board layouts, and bill of materials are
included in this document.
Contents
1 Description ................................................................................................................... 2
2 Specifications ................................................................................................................ 2
3 Software ...................................................................................................................... 2
4 Stereo Setup ................................................................................................................. 2
5 Mono Setup .................................................................................................................. 4
6 Multi-Channel Setup ........................................................................................................ 5
7 Digital Audio Interfaces ..................................................................................................... 6
8 Hardware Documentation .................................................................................................. 9
List of Figures
1 TAS2770EVM-STEREO Stereo Configuration .......................................................................... 3
2 Playback Device Settings................................................................................................... 3
3 Thesycon Driver Control Panel ........................................................................................... 4
4 TAS2770EVM-STEREO Mono Configuration............................................................................ 5
5 Multi-Channel Setup ........................................................................................................ 6
6 USB Audio Input Configuration ........................................................................................... 7
7 AP/PSIA Input Configuration .............................................................................................. 8
8 Schematic: XMOS USB Controller ........................................................................................ 9
9 Schematic: Input Multiplexing and Level Shift.......................................................................... 10
10 Schematic: External Input / Output Routing ............................................................................ 11
11 Schematic: TAS2770 Channel 1 Control................................................................................ 12
12 TAS2770 Channel 2 Control.............................................................................................. 13
13 On-Board Power............................................................................................................ 14
14 PCB: Top Silkscreen....................................................................................................... 15
15 PCB: Top Solder Mask .................................................................................................... 16
16 PCB: Top Copper .......................................................................................................... 17
17 PCB: Copper Layer 2...................................................................................................... 18
18 PCB: Copper Layer 3...................................................................................................... 19
19 PCB: Bottom Copper ...................................................................................................... 20
20 PCB: Bottom Solder Mask ................................................................................................ 21
21 PCB: Bottom Silk Screen.................................................................................................. 22
1 Reference Board Specifications .......................................................................................... 2
2 TAS2770 Reference Board Bill of Materials ........................................................................... 23
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List of Tables
Copyright © 2017, Texas Instruments Incorporated
TAS2770 Stereo Evaluation Module
1
Description
Trademarks
1 Description
The TAS2770 is a mono digital input Class-D audio amplifier optimized for efficiently driving high
peak power into small loudspeakers. The Class-D amplifier is capable of delivering 18.3 W of peak
power into a 4 Ω load while sustaining 1 % THD+N at a battery voltage of 13.8 V. Integrated
speaker voltage and current sense provides for real time monitoring of loudspeaker behavior. Up to
eight devices can share a common bus via either I2S/TDM + I2C or SoundwireSM interfaces. Two
PDM inputs are provided for low latency playback or sensor aggregation.
The TAS2770EVM-STEREO supports evaluation and development with the TAS2770 device
through the following interfaces:
• USB interface
– TAS2770 control through PurePath™ Console 3 (PPC3) GUI, USB-HID
– USB-class audio device, compatible with Microsoft® Windows® 7+
• Digital audio AP and PSIA interface through 100-mil headers
• I2C interface for TAS2770 control
• SoundwireSMinterface for TAS2770 control
2 Specifications
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Table 1. Reference Board Specifications
Amplifier power supply (VBAT) 4.5 V to 16 V
EVM power supply 4.5 V to 16 V
IO power supply (IOVDD) 1.65 V to 1.95 V
Output Power 18.3 W
USB, USB class-audio Micro-USB B
3 Software
The TAS2770EVM-STEREO can be easily configured with PurePath ™ Console 3 running the
TAS2770 plug-in.
Please refer to the TAS2770 PurePath Console User’s guide for detailed descriptions of the software
features.
NOTE: The evaluation driver currently distributed for use with this EVM will periodically inject a tone
into the data stream. This behavior is intentional for this version of the driver. Legal
procurement of the full release version of this driver is in process which will resolve this
issue. As soon as it is available it will be provided to the end user.
4 Stereo Setup
1. Install PurePath™ Console 3 with the TAS2770EVM-STEREO plug-in
2. Connect the first speaker to J10 on the EVM. Alternatively, J23 and J24 can be used for speaker
connections.
3. Connect a second speaker to J29 on the EVM. Alternatively, J28 and J30 can be used for speaker
connections.
4. Attach a power supply to connector J9. There is also an alternate barrel jack connector (J19) adjacent
to this connector.
5. Set jumper J13 to select the desired I2C address for channel 1.
6. Set jumper J31 to select the desired I2C address for channel 2.
2
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7. Connect the EVM to a Windows® 7+ PC with a micro-USB cable (J16).
Stereo Setup
Figure 1. TAS2770EVM-STEREO Stereo Configuration
8. Verify that the EVM is the default playback device by opening the sound dialog from the Windows®
Control Panel as shown in Figure 2.
Figure 2. Playback Device Settings
9. Set the sampling rate using the Windows® setting by opening Properties > Advanced. The
TAS2770EVM-STEREO supports 44.1 KHz and 48KHz sampling rates.
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Mono Setup
10. Set the bit depth as desired using the Thesycon Control Panel accessible from the system tray shown
11. Proceed to configure the device using PPC3.
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in Figure 3.
Figure 3. Thesycon Driver Control Panel
Please refer to Figure 8 for default jumper settings.
5 Mono Setup
1. Install PurePath™ Console 3 with the TAS2770EVM-STEREO plug-in
2. Connect the first speaker to J10 on the EVM. Alternatively, J23 and J24 can be used for speaker
connections.
3. Attach a power supply to connector J9. There is also an alternate barrel jack connector (J19) adjacent
to this connector.
4. Set jumper J13 to select the desired I2C address for channel 1.
5. Connect the EVM to a Windows® 7+ PC with a micro-USB cable (J16).
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Multi-Channel Setup
Figure 4. TAS2770EVM-STEREO Mono Configuration
6. Verify that the EVM is the default playback device by opening the sound dialog from the Windows®
Control Panel as shown in Figure 2.
7. Set the sampling rate using the Windows® setting by opening Properties > Advanced. The
TAS2770EVM-STEREO supports 44.1 KHz and 48KHz sampling rates.
8. Set the bit depth as desired using the Thesycon Control Panel accessible from the system tray shown
in Figure 3.
9. Proceed to configure the device using PPC3.
6 Multi-Channel Setup
1. Install PurePath™ Console 3 with the TAS2770EVM-STEREO plug-in
2. Connect up to 4 TAS2770EVM-STEREOs together using connectors J5 and J7.
3. Attach a power supply to each board.
4. The leftmost board should have jumpers set to match the Stereo configuration. On all other boards
insert a jumper on J2 and J6. See Figure 5 for details.
5. Set Jumpers J13 and J31 on each board to a unique address.
6. Configure the sampling rate and bit depth as discussed in Mono Setup steps 6-8.
7. Proceed to configure the device using PPC3.
8. Connect the leftmost EVM to a Windows® 7+ PC with a micro-USB cable (J16).
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Digital Audio Interfaces
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7 Digital Audio Interfaces
The various digital audio interfaces on the TAS2770 Reference Board can be selected through hardware
settings and software settings. Several headers close to the TAS2770 device allow access to the following
digital audio signals:
• I2S Data out(SDOUT) from the TAS2770 (for example, current and voltage sense data)
• I2S Data in(SDIN) to the TAS2770
• I2S Word clock or fram sync(FSYNC)
• I2S Bit clock(SBCLK)
• PDM Clock (PDMCLK0) – optional input source for TAS2770
• PDM Clock (PDMCLK1) – optional input source for TAS2770
• PDM Data (PDMD0) – optional input source for TAS2770
• PDM Data (PDMD1) – optional input source for TAS2770
• I2C Clock (SCLK)
6
TAS2770 Stereo Evaluation Module
Figure 5. Multi-Channel Setup
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• I2C Data (SDA)
TAS2770 can be configured for SoundwireSM Mode as well:
• SoundwireSM clock - SBCLK
• SoundwireSM data - SDOUT
• SoundwireSM address – SDA
• SoundwireSM address – FSYNC
• SoundwireSM address – SCL
A jumper inserted in the SW slot of J13 sets the TAS2770 to SoundwireSM mode. Then J11 can be
set as desired to configure the device address.
The selection between USB (internal) and External inputs is controlled by jumpers J2 and J6.
These jumpers set TDM and I2C respectively.
7.1 Digital Audio Interface Selection
7.1.1 USB
The TAS2770 Reference Board contains an XMOS microcontroller that acts as a USB HID and USBclass audio interface. To select USB, remove jumpers J6 and J2. Insert a jumper in J12. This is shown
in Figure 6.
Digital Audio Interfaces
7.1.2 Direct (AP/PSIA)
Insert a jumper on J2 and connect the external digital audio source (for example AP or PSIA) to the
external input header pin. The odd numbered pins on this header provide a ground for each signal.
This is shown in Figure 9. Note that the jumper setting for J1 must reflect the logic level of the external
source.
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Figure 6. USB Audio Input Configuration
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TAS2770 Stereo Evaluation Module
7
Digital Audio Interfaces
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Figure 7. AP/PSIA Input Configuration
8
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GND
1.0V
0.1µF
16V
C56
GND
1.0V
0.1µF
16V
C55
GND
1.0V
0.1µF
16V
C47
GND
1.0V
0.1µF
16V
C48
GND
1.0V
0.1µF
16V
C49
GND
1.0V
0.1µF
16V
C50
GND
1.0V
0.1µF
16V
C51
GND
1.0V
0.1µF
16V
C52
GND
1.0V
0.1µF
16V
C53
GND
1.0V
0.1µF
16V
C54
GND
1.0V
0.1µF
16V
C57
GND
1.0V
0.1µF
16V
C58
GND
1.0V
0.1µF
16V
C59
GND
1.0V
0.1µF
16V
C60
3.3V 1.0V
3.3V
1.0V
GND
4.7
R23
0.1µF
C42
GND
X-SDZ_CTRL
X-SDZ
IRQZ-3.3V
X-QSPI-CS
1.0k
R16
2.2k
R17
2.2k
R18
3.3V 3.3V 3.3V
GND
0.1µF
16V
C32
3.3V
GND
0.1µF
16V
C40
3.3V
GND
0.1µF
16V
C35
3.3V
GND
0.1µF
16V
C19
1.8V
X-SDA
X-SCL
GND
0.1µF
16V
C34
3.3V
GND
0.1µF
16V
C18
1.8V
GND
0.1µF
16V
C33
3.3V
GND
0.1µF
16V
C20
1.8V
GND
0.1µF
16V
C28
3.3V
GND
0.1µF
16V
C22
3.3V
GND
0.1µF
16V
C29
3.3V
GND
0.1µF
16V
C30
3.3V
GND
0.1µF
16V
C26
3.3V
GND
0.1µF
16V
C27
3.3V
GND
0.1µF
16V
C25
3.3V
GND
0.1µF
16V
C24
3.3V
GND
0.1µF
16V
C23
3.3V
GND
0.1µF
16V
C31
3.3V
GND
0.1µF
16V
C43
3.3V
GND
0.1µF
16V
C44
3.3V
GND
0.1µF
16V
C45
3.3V
X-DOUT
X-BCLK
X-LRCK
X-SDA
X-SCL
X-SDZ
X-SDZ_CTRL
I2C
I2S
SHUTDOWN
X-DIN
TO
MUXES
AND
TRANSLATORS
VDDIOL
6
VDD
11
VDDIOL
14
VDD
16
VDD
17
VDDIOL
19
VDD
24
VDDIOL
29
VDD
36
VDD
41
VDDIOL
42
VDDIOR
52
VDD
56
VDD
60
NC
65
VDDIOR
67
VDD
73
VDDIOR
78
VDD
80
VDD
81
VDDIOR
83
VDD
87
VDDIOR
92
VDD
101
VDD
102
PLL_AVDD
103
PLL_AGND
104
OTP_VCC
105
VDDIOT
110
VDDIOT
111
VDD
120
USB_VDD33
44
USB_VDD
49
NC
50
VDD
126
PAD
129
U5E
XEF216-512-TQ128-C20
X1D35
13
X1D36
15
X1D37
18
X1D38
20
X1D18
25
X1D19
26
X1D14
51
X1D15
53
X1D20
54
X1D21
55
X1D02
72
X1D03
74
X1D04
75
X1D05
76
X1D06
77
X1D07
79
X1D08
82
X1D09
84
X1D00
85
X1D01
86
X1D41
107
X1D42
108
X1D43
109
X1D40
106
X1D26
112
X1D27
113
X1D28
114
X1D29
115
X1D30
116
X1D31
117
X1D32
118
X1D33
119
X1D39
21
X1D16
22
X1D17
23
X1D10
121
X1D11
122
U5B
XEF216-512-TQ128-C20
GND
USB-DP
USB-DM
USB-ID
VBUS-IN
L2
43.2
R29
GND
100k
R28
0.1µF
C61
GND GND
USB_ID
43
USB_VBUS
45
USB_DP
46
USB_DM
47
USB_RTUNE
48
U5C
XEF216-512-TQ128-C20
VBUS
1
D-
2
D+
3
ID
4
GND
5
678
9
J16
USB
X0D36
3
X0D37
4
X0D38
5
X0D39
7
X0D40
8
X0D41
9
X0D42
10
X0D43
12
X0D01
27
X0D10
28
X0D00
30
X0D04
31
X0D11
32
X0D05
33
X0D06
34
X0D07
35
X0D02
37
X0D03
38
X0D08
39
X0D09
40
X0D14
57
X0D15
58
X0D20
59
X0D21
61
X0D12
62
X0D13
63
X0D22
64
X0D23
66
X0D16
68
X0D17
69
X0D18
70
X0D19
71
X0D24
88
X0D25
89
X0D34
90
X0D35
91
X0D26
93
X0D27
94
X0D32
95
X0D28
96
X0D33
97
X0D29
98
X0D30
99
X0D31
100
U5A
XEF216-512-TQ128-C20
X-SPI-SS0
X-SPI-SS1
X-SPI-SS2
X-SPI-SS3
47k
R19
3.3V
47k
R20
3.3V
47k
R21
3.3V
47k
R22
3.3V
10k
R5
3.3V
10k
R46
3.3V
10k
R45
3.3V
IRQ
IRQZ-3.3V
IRQZ-3.3V
3.3V
Blue
D3
USB RDY
680
R6
10.0k
R9
GND-USB
2.2µF
C3
GND
X-TCK
X-TMS
X-TDO
X-TDI
X-TRSTN
VDD
4
OE/STANDBY1GND
2
OUT
3
24
MHz
Y1
3.3V
3.3V
1A
1
GND
2
2A32Y
4
VCC
5
1Y
6
U9
SN74LVC2G07DSFR
0
R30
TRST
123
RST
124
CLK
125
TMS
127
TCK
128
TDO
1
TDI
2
XEF216-512-TQ128-C20
U5D
X-RSTN
X-TCK
X-TMS
X-TDO
X-TDI
3.3V
GND
3.3V
GND
X-24M
XIN/CLK
1
S0
2
VDD
3
VCTRL
4
GND
5
VDDOUT
6
VDDOUT
7
Y3
8
Y2
9
GND
10
Y1
11
SCL/S2
12
SDA/S1
13
XOUT
14
U14
CDCE913PWR
GND
1.8V 3.3V
X-SDA
X-SCL
GND
VCCA
1
A1
2
A2
3
GND
5
B2
6
B1
7
OE
4
VCCB
8
U8
SN74AVC2T244DQMR
GND GND
3.3V 1.8V
ENABLE
1
GND
2
SENSE
3
SENSE_OUT
4
CT
5
VCC
6
U7
TPS3897ADRYR
3.3V
25.5k
R24
1.0V
51.0k
R31
10.0k
R25
3.3V
470pF
C4
GND
GND
GND
10.0k
R26
10.0k
R27
10.0k
R8
33.2
R57 X-24M
GND
0.1µF
16V
C1
GND
0.1µF
16V
C2
1.8V 1.8V
X-MCLK
X-BCLK
X-MCLK
X-MCLK
33.2R56
33.2R58
33.2R7
33.2R32
33.2R33
33.2R55
33.2R54
X-TCK
X-TMS
X-TDO
X-TDI
X-TRSTN
1
2
3
4
5
6
J17
JTAG
GND
GND
0.1µF
16V
C104
3.3V
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8 Hardware Documentation
8.1 TAS2770EVM-STEREO Schematics
Hardware Documentation
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Figure 8. Schematic: XMOS USB Controller
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TAS2770 Stereo Evaluation Module
9
FSYNC
SCL
SDA
SDZ
I2S
SDZ
33.2
R2
>
X-SCL
X-SCL
X-SDA
X-BCLK
XMOS
X-BCLK
X-LRCK
X-DOUT
FSYNC
S
1
1B1
2
1B2
3
1A
4
2B1
5
2B2
6
GND
8
3A
9
3B2
10
3B1
11
4A
12
4B2
13
4B1
14
2A
7
OE
15
VCC
16
U17
SN74CB3Q3257DGVR
3.3V
GND
GND
I2C/SHUTDOWN SOURCE SELECT
10.0k
R44
OUT=INTERNAL
IN=EXTERNAL
S
1
1B1
2
1B2
3
1A
4
2B1
5
2B2
6
GND
8
3A
9
3B2
10
3B1
11
4A
12
4B2
13
4B1
14
2A
7
OE
15
VCC
16
U12
SN74CB3Q3257DGVR
3.3V
GND
GND
TDM SOURCE SELECT
>
>
10.0k
R41
GND
OUT=INTERNAL
IN=EXTERNAL
33.2R38
33.2
R39
33.2
R40
J6
I2C-SEL
3.3V
J2
TDM-SEL
3.3V
GND
X-SDZ
>
>
>
>
>
>
3.3V-1.8V TRANSLATORS (Lev el Shifters)
FSYNC-XLTR
GND
Vcc
SDOUT-XLTR
DIR1
15
DIR2
16
A1
1
A2
2
A3
3
A4
4
DIR3
5
DIR4
6
OE
7
GND
8
B4
9
B3
10
B2
11
B1
12
VCCB
13
VCCA
14
U11
SN74AVC4T774RSVR
1.8V
GND
SBCLK-XLTR
>
>
>
>
>
>
>
>
SDZ-XTLR
1
2
3
4
5
U18
LVC1G125
1.8V
GND
XMOS
EXT-IN
SBCLK-EXTIN
SCL-EXTIN
SDA-EXTIN
SBCLK-EXTIN
FSYNC-EXTIN
SDIN-EXTIN
FSYNC-EXTIN
SDIN-EXTIN
X-SDZ
>
X-SDA
SCL-EXTIN
EXT-IN
SDA-EXTIN
I2C
I2S
X-LRCK
>
X-DOUT
>
SHUTDOWN
XMOS
EXT-IN
SDZ-EXTIN
SDZ-EXTIN
>
SDZ-XTLR
SCL-XLTR
SDA-XLTR
I2C
SHUTDOWN
>
>
> >
TO DUT
EXT-OUT
AND
TO DUT AND
EXT-OUT
TO DUT AND EXT-OUT
>
>
>
1.8V
SCL
SDA
3.3V
GND
SDA_B
1
GND
2
VCCA
3
SDA_A
4
SCL_A
5
OE
6
VCCB
7
SCL_B
8
U15
TCA9406DCUR
10k
R43
SCL-XLTR
SDA-XLTR
X-SDZ_CTRL
>
0.1µF
16V
C5
GND
Vcc
SBCLK
33.2
R1 SBCLK
SDIN
33.2
R3 SDIN
GND
0.1µF
16V
C36
GND
0.1µF
16V
C37
1.8V 1.8V
SDZ-CTRL
>
SDZ-CTRL
X-SDZ_CTRL
>
10.0k
R59
3.3V
Hardware Documentation
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10
TAS2770 Stereo Evaluation Module
Figure 9. Schematic: Input Multiplexing and Level Shift
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GND
SBCLK-EXTIN
FSYNC-EXTIN
SDIN-EXTIN
SDOUT
SCL-EXTIN
SDA-EXTIN
SDZ-EXTIN
IRQZ
INPUT HEADER
0.1µF
16V
C8
GND
3.3V
0.1µF
16V
C9
GND
3.3V
0.1µF
16V
C10
GND
3.3V
(EXT)
GND
2
1
4
5
3
U16
SN74LV1T126DCKR
GND
Blue
D2
IRQ
360
R42
3.3V
IRQZ LED
SDIN-EXTOUT
SDOUT
SBCLK-EXTOUT
FSYNC-EXTOUT
SDA-EXTOUT
SDZ
IRQZ
>
<
SDZ
IRQZ
SCL-EXTOUT
<
>
0.1µF
16V
C11
GND
3.3V
1.8V
47kR34
GND
2.2kR36
1.8V
IRQZ Pullup
SDZ Control
J3
SDZ
10.0kR37
IRQZ
SDZ
>
>
>
<
CONTROL
SDZ-EXTIN
SCL-EXTIN
I2C
SDA-EXTIN
I2S
SBCLK-EXTIN
FSYNC-EXTIN
SDIN-EXTIN
OUTPUT HEADER
<
>
>
>
SCL
I2C
SDA
SBCLK
FSYNC
SDOUT
I2S
TO MUXES
FROM DUT OR
GND
DIR1
15
DIR2
16
A1
1
A2
2
A3
3
A4
4
DIR3
5
DIR4
6
OE
7
GND
8
B4
9
B3
10
B2
11
B1
12
VCCB
13
VCCA
14
U3
SN74AVC4T774RSVR
1.8V
GND
SCL
SDA
3.3V
GND
SDA_B
1
GND
2
VCCA
3
SDA_A
4
SCL_A
5
OE
6
VCCB
7
SCL_B
8
U4
TCA9406DCUR
10k
R4
SDA-EXTOUT
SCL-EXTOUT
SDIN-EXTOUT
SBCLK-EXTOUT
FSYNC-EXTOUT
>
>
>
>
SDIN
SDZ
CONTROL
>
>
>
>
IRQZ
LEVEL SHIFTERS
>
VCCA
1
A1
2
A2
3
GND
5
B2
6
B1
7
OE
4
VCCB
8
U6
SN74AVC2T244DQMR
GND
1.8V3.3V
X-DIN
IRQZ-3.3V
SDOUT
IRQZ
TO XMOS
>
GND
123
J1
Vcc SELECT
Vcc 1.8V3.3V
Vcc
1.8V
3.3V
0.1µF
16V
C6
GND
Vcc
GND
0.1µF
16V
C38
1.8V
J14
X-DOUT
X-DIN
GND
J4
IRQZ
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
J7
INPUT
1
3
56
4
2
7
910
8
12 11
14 13
16 15
J5
OUTPUT
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Hardware Documentation
SLOU497–October 2017
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Figure 10. Schematic: External Input / Output Routing
Copyright © 2017, Texas Instruments Incorporated
TAS2770 Stereo Evaluation Module
11
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