Texas Instruments TAS3251 User manual

1
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TAS3251 Evaluation Module
ADVANCE INFORMATION
User's Guide
SLAU757–January 2018
TAS3251 Evaluation Module
This user's guide describes the characteristics, operation, and use of the TAS3251 evaluation module. A
complete printed-circuit board (PCB) description, schematic diagram, and bill of materials (BOM) are also
included. For questions and support go to the E2E forums (e2e.ti.com).
The main contents of this document are:
• Hardware descriptions and implementation
• Design information
Related documents:
•TPA3245 115-W Stereo, 230-W Mono PurePath™ Ultra-HD Analog-Input Class-D Amplifier data sheet

TAS32xx
PWM A
PWM B
PWM C
PWM D
I2S Input
MCLK
BCLK
LRCLK
Data
Copyright © 2017, Texas Instruments Incorporated
Quick Start (BTL Mode) www.ti.com
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TAS3251 Evaluation Module
ADVANCE INFORMATION
Contents
1 Quick Start (BTL Mode)..................................................................................................... 2
2 Schematic and Bill of Materials ............................................................................................ 6
List of Figures
1 Output Configuration BTL .................................................................................................. 2
2 EVM Board (Top Side)...................................................................................................... 3
3 EVM Board (Bottom Side).................................................................................................. 4
4 TAS3251EVM Schematics (1 of 6)........................................................................................ 6
5 TAS3251EVM Schematics (2 of 6)........................................................................................ 7
6 TAS3251EVM Schematics (3 of 6)........................................................................................ 8
7 TAS3251EVM Schematics (4 of 6)........................................................................................ 9
8 TAS3251EVM Schematics (5 of 6) ...................................................................................... 10
9 TAS3251EVM Schematics (6 of 6) ...................................................................................... 11
List of Tables
1 Jumper and Switch Configurations (USB BTL Mode) .................................................................. 4
2 TAS3251EVM Bill of Materials ........................................................................................... 12
Trademarks
PurePath is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
1 Quick Start (BTL Mode)
Figure 1 shows the output configuration BTL.
Figure 1. Output Configuration BTL
1.1 Required Hardware
The following is required for this EVM configuration:
• TAS3251EVM
• Power supply 5–17 A, 15–36 V
• Two cables for for power supply connection
• Two 3–8 Ωspeakers or resistor loads (ensure speaker or load is appropriately sized for required
wattage output)
• Four cables for banana or terminal to speaker or load connection
• USB micro cable
• PC with PurePath™ Console 3 (PPC3) and audio track

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1.2 Connections and Board Configuration (USB BTL Mode)
Figure 2 and Figure 3 illustrate the top and bottom EVM boards.
Figure 2. EVM Board (Top Side)

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Figure 3. EVM Board (Bottom Side)
Use the following when connecting and configuring the board for 48-kHz USB BTL mode:
1. Ensure the power supply is OFF. Connect the power supply positive terminal to J24 PVDD (red) and
negative to J1 GND (black).
2. Connect the left channel speaker or power resistor load (3–8 Ω) to the TAS3251EVM OUTA terminal
(J10 OUTA (red)) and the other side of the speaker or resistor load to the TPA3251EVM OUTB
terminal (J10 OUTB (black)).
3. Connect the right channel speaker or power resistor load (3–8 Ω) to the TAS3251EVM OUTA terminal
(J15 OUTA (red)) and the other side of the speaker or resistor load to the TPA3251EVM OUTB
terminal (J15 OUTB (black)).
4. Check to make sure that the power supply is connected to J24 only, and the speakers or resistor loads
are connected to J10 or J15 only, as their colors are the same.
5. Connect USB cable from the PC to the TAS3251EVM.
6. Ensure that DAC MUTE S1 and AMP RESET S3 are in the lower positions of MUTE and RESET.
7. Check Table 1 for all jumper and switch configurations.
Table 1. Jumper and Switch Configurations (USB BTL Mode)
Jumper Description Configuration for BTL
J16 HS-EN USB high-speed enable Do not care
J33 XMOS DISABLE Remove
J2 Frequency select Remove
J30 Data select for J9 Do not care
J1 MCLK-SEL Install
J3 MCLK 1-2
J4 SCLK 1-2

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Table 1. Jumper and Switch Configurations (USB BTL Mode) (continued)
Jumper Description Configuration for BTL
J5 LRCLK 1-2
J7 SDIN 1-2
J37 I2S source select Install
J31 PBTL INC Remove
J32 PBTL IND Remove
J14 MODE Install
J19 ADR Install
J22 PWM switching frequency 3-4
J35 SLAVE ENABLE Remove
J11 JTAG power Do not care
J26 PVDD Install
J29 3.3V Install
J27 12V Install
J20 GVDD Install
J8 5-V select 1-2
S1 DAC MUTE MUTE
S3 AMP RESET RESET
1.3 Power Up
Ensure that the required connections and configurations have been checked. The TAS3251EVM board
can now be powered on.
1. Enable the power supply at 15 V to 36 V and ensure that D13 and D14 illuminates. LEDs D9 and D10
should not be illuminated.
2. Bring the DAC out of MUTE by switching DAC MUTE (S1) to NORMAL.
3. Bring the Power Stage out of RESET by switching AMP RESET (S3) to the high position. You should
see the FAULT LED (D10) blink once quickly, then remain unilluminated.

GND
47.0k
R157
3.3V
1A
1
GND
2
2A
32Y 4
VCC 5
1Y 6
U29
SN74LVC2G07 DSFR
3.3V
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
XEF216-512-TQ 128-C20
U2E
3.3V 1.0V
3.3V
1.0V
GND
4.75
R140
0.1µF
C82
GND
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
XEF216-512-TQ 128-C20
U2A 1.00k
R110
3.3V
GND
3.3V
GND
3.3V
10.0k
R144
3.3V
GND
X-HS-EN
L2
USB_D_P
USB_D_M
USB_ID
GND
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
U2B
XEF216-512-TQ 128-C20
EN
1PG 2
FB 3
VOS 4
GND 5
SW 6 VIN
7
U1
TPS62085RLTR
22µF
C125
470nH
L1
40.2k
R1
162k
R3
1.00M
R2
5V to 1V BUCK
0.1µF
C126
22µF
C124
1.0V
GND
GND
GND
GND GND
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
U26
CDCE913PWR
GND
3.3V
VCCA
1
A1
2
A2
3
GND 5
B2 6
B1 7
OE
4
VCCB 8
U6
SN74AVC2T244 DQMR
GND GND
3.3V 1.8V
ENABLE
1
GND 2
SENSE
3
SENSE_OUT 4
CT
5
VCC
6
U30
TPS3897ADRYR
3.3V
25.5k
R156
1.0V
51.0k
R158
10.0k
R155
3.3V
470pF
C150
GND
GND
GND
10.0k
R149
10.0k
R150
X-24M
X-MCLK
3.3V
Blue
D1
USB RDY
560
R141
2.2µF
C142
GND
GND GND
X-MCLK
47.0k
R136
3.3V 3.3V 3.3V
USB I/O
USB_ID
43 USB_VBUS
45
USB_DP
46
USB_DM
47
USB_RTUNE
48
XEF216-512-TQ 128-C20
U2C
43.2
R148
0.1µF
C141
GND
GND
10.0k
R145
X-TCK
X-TMS
X-TDO
X-TDI
X-TRSTN X-RSTN
TRST
123
RST
124 CLK
125
TMS
127 TCK
128
TDO
1TDI
2
XEF216-512-TQ 128-C20
U2D
X-24M
X-TCK
X-TMS
X-TDO
X-TDI
X-RSTN
TRST
XMOS AND I/Os
0
R147
VDD
4
OE/STANDBY
1GND 2
OUT 3
24MHz
Y1
3.3V
GND
10.0k
R154
JTAG
CLOCK GENERATION
33.2
R153
33.2R146
33.2
R151
33.2
R152
GND
0.1µF
16V
C148
3.3V
GND
0.1µF
16V
C149
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
X-SCL
X-SDA
33.2R143
33.2
R142
1
2
3
4
5
6
J17
JTAG
GND X-TDI
X-TMS
X-TCK
X-TDO
X-TRSTN
VBUS-XMOS
X-SCL
X-SDA
BCLK-USB
LRCLK-USB
SDOUT-USB
3.3V
BCLK-USB
5V
4.99k
R124
4.99k
R133
3.3V 3.3V
SDOUT-USB
BCLK-USB
LRCLK-USB
I2S
USB-SPDIF
0R134
0
R135
X-MCLK
X-SCL
X-SDA
GND
I2C
SDA
SCL
GND
3.3V
SDA_B
1
GND
2VCCA 3
SDA_A 4
SCL_A 5
OE 6
VCCB 7
SCL_B
8
U3
TCA9406DC UR
I2C-BUF-EN
I2C BUF CTRL
I2C-BUF-EN
0.1µF
16V
C17
0.1µF
16V
C27
0.1µF
16V
C37
0.1µF
16V
C40
0.1µF
16V
C45
0.1µF
16V
C54
0.1µF
16V
C58
0.1µF
16V
C74
0.1µF
16V
C80
0.1µF
16V
C99
0.1µF
16V
C100
0.1µF
16V
C101
0.1µF
16V
C102
5V-USB
5V-USB
5V-USB
5V-USB
0.1µF
16V
C143
0.1µF
16V
C144
0.1µF
16V
C145
0.1µF
16V
C146
0.1µF
16V
C147
1.8V
1.8V 1.8V
VBUS 1
D- 2
D+ 3
ID 4
GND 5
6
7
8
9
J18
USB
J16
HS-EN
GND
XMOS-ENABLE
XMOS-ENABLE
0
R159
3.3V
RESET-AMP
DAC_MUTE
FAULT
CLIP_OTW
0R160
0R161
0R162
0R163
47.0k
R137
47.0k
R138
47.0k
R139
XIN-CLK
0
R63
0
R164
3.3V
0
R167
1.0V
GND
0.1µF
16V
C127
0.1µF
16V
C128
0.1µF
16V
C129
0.1µF
16V
C130
0.1µF
16V
C131
0.1µF
16V
C132
0.1µF
16V
C133
0.1µF
16V
C134
0.1µF
16V
C135
0.1µF
16V
C136
0.1µF
16V
C137
0.1µF
16V
C138
0.1µF
16V
C139
0.1µF
16V
C140
GND-USB
J33
10.0k
R80
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2 Schematic and Bill of Materials
This section includes the TAS3251EVM schematics and the TAS3251EVM BOM.
2.1 Schematic
Figure 4 to Figure 9 display the EVM schematics.
Figure 4. TAS3251EVM Schematics (1 of 6)

Q4
2.00k
R52
ADR
DUT 0R62
CLIP_OTW
FAULT
DUT MODE
Blue
D8
USB
Q8
2.00k
R105
Blue
D15
OPTICAL
Q9
GND
2.00k
R107
Q10
GND
2.00k
R109
MUTE-LED
P2-LED
P1-LED
P0-LED
I2S MUX CONTROL
MUX_CTRL
MUX-CTRL_MCU
0
R111
ADR-MCU
GND
S4 MUTE
S5 VOL UP
S6 VOL DN
S7 PROGRAM SEL
S8 LOAD
S10 INPUT
470pF
C53
470pF
C51
470pF
C50
470pF
C49
470pF
C48
470pF
C57
25.5k
R38
25.5k
R39
25.5k
R40
25.5k
R42
25.5k
R44
25.5k
R45
AVCC
14
AVSS 13
DVCC
38
DVCC
39
DVSS 1
DVSS 4
P1.0/TA0CLK/ADC10CLK
29
P1.1/TA0.0
30
P1.2/TA0.1
31
P1.3/TA0.2
32
P1.4/SMCLK/TCK
33
P1.5/TA0.0/TMS
34
P1.6/TA0.1/TDI
35
P1.7/TA0.2/TDO/TDI
36
P2.0/TA1CLK/ACLK/A0 6
P2.1/TA0INCLK/SMCLK/A1 7
P2.2/TA0.0/A2 8
P2.3/TA0.1/A3/VREF-/VEREF- 27
P2.4/TA0.2/A4/VREF+/VEREF+ 28
P2.5/TA1.0/ROSC 40
P3.0/UCB0STE/UCA0CLK/A5
9
P3.1/UCB0SIMO/UCB0SDA
10
P3.2/UCB0SOMI/UCB0SCL
11
P3.3/UCB0CLK/UCA0STE
12
P3.4/UCA0TXD/UCA0SIMO
23
P3.5/UCA0RXD/UCA0SOMI
24
P3.6/TA1.1/A6
25
P3.7/TA1.2/A7
26
P4.0/TB0.0/CA0 15
P4.1/TB0.1/CA1 16
P4.2/TB0.2/CA2 17
P4.3/TB0.0/A12/CA3 18
P4.4/TB0.1/A13/CA4 19
P4.5/TB0.2/A14/CA5 20
P4.6/TB0OUTH/A15/CA6 21
P4.7/TB0CLK/CA7 22
PAD 41
RST/NMI/SBWTDIO 5
TEST/SBWTCK 37
XIN/P2.6 3
XOUT/P2.7 2
U12
MSP430G2955IRHA40R
SBWTDIO
SBWTCK
GND
3.3V
GND
0.1µF
C56
GND
1µF
C55
0.1µF
C109
GND
I2C SDA 0
R55 SDA-MCU
SCL 0
R54 SCL-MCU
MODE
0
R103
0
R104
SW-LOAD
SW-PROGSEL
SW-VOLDN
SW-VOLUP
SW-MUTE
SW-INPUT
SW-MUTE
SW-VOLUP
SW-LOAD
SW-PROGSEL
SW-VOLDN
3.3V
Blue
D16
COAX
3.3V
3.3V
GND
3.3V
USB-LED
OPTICAL-LED
COAX-LED
USB-LED
OPTICAL-LED
COAX-LED
GND
3.3V
GND
3.3V
Blue
D6
P1
Blue
D5
P2
560
R47
Q3
2.00k
R51
Red
D4
MUTE
Q2
2.00k
R50
Blue
D7
P0
Q5
2.00k
R53
GND
3.3V
GND
3.3V
I2S BUFFERS
SLAVE-EN
I2S-BUF-EN
J35
SLAVE ENABLE
0
R113
GND
10.0k
R114
3.3V
CLIP_OTW
FAULT
J2
FREQ SEL
GND
FREQ SELECT
FREQ-SEL
OUT = 24.576MHz
IN = 22.5792MHz
FREQUENCY
SELECT
SLAVE
ENABLE
OUT = NORMAL MODE
IN = SLAVE MODE
1 2 3 4 5 6
J36 JTAG-RA
GND
J37
I2S SELECT
GND
I2S SELECT
OUT = AIB I2S
IN = SRC I2S
10.0k
R5
3.3V
FREQ-SEL
3.3V
AIB
3.30k
R60
GND
PVDD
100k
R32
GND
8.06k
R56
1µF
100V
C46
1µF
100V
C97
0.1uF
C64
GND
0.1uF
C96
GND
VDD-RST
GND
RESET-AMP
GND 1
GND 2 MR
5
RESET 3 VDD
4
U5
TPS3802K33DCKR
VDD-RST
GND
6
4
5
13
S3
AMP RESET
GND
GND
6
4
5
13
S1
DAC MUTE
GND
RST-AIB
P2-LED
P1-LED
P0-LED
MUTE-LED
GND
3.3V
49.9R43
47.0k
R41
3.3V
SPI BI-WIRE JTAG
VCC TOOL
TDIO
TCK
GND
J11
JTAG POWER
SBWTDIO
TCK
1
2
3
4
5
6
J12
JTAG
2200pF
C52
GND
SBWTCK
SBWTDIO
GPIO_AIB-1
GPIO_AIB-2
SW-INPUT
MUTE-AIB
DAC_MUTE
10.0k
R92
3.3V
DAC_MUTE
RST-AIB
MUTE-AIB
GPIO_AIB-1
GPIO_AIB-2
RST-AMP
TO DUT
560
R46
560
R48
560
R49
560
R106
560
R108
560
R57
0.1µF
C151
GND
GVDD
10.0k
R129
3.3V
A0-SRC
I2C BUFFERS I2C-BUF-EN 0
R112
0R10
SRC4392
MCLK-SEL
MCLK SELECT
MCLK-SEL
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Figure 5. TAS3251EVM Schematics (2 of 6)

RX1+
1
RX1-
2
RX2+
3
RX2-
4
RX3+
5
RX3-
6
RX4+
7
RX4-
8
LOCK 11
RXCKO 12
TX- 31
TX+ 32
AESOUT 34
BLS 35
SYNC 36
BCKA
37 LRCKA
38
SDINA
39
SDOUTA
40
SDOUTB
45 SDINB
46
LRCKB
47
BCKB
48
MCLK
25
RXCKI
13
MUTE
14 RDY
15
NC 41
CPM 18
CS/A0 19
CCLK/SCL 20
CDIN/A1 21
CDOUT/SDA 22
INT 23
RST 24
GPO1 26
GPO2 27
GPO3 28
GPO4 29
U7A
SRC4392IPFBR
GND
3.3V
GND
0.1µF
C18
33.0
R16
0.1µF
C19
0.1µF
C20
0.1µF
C21
L4
GND
RX1+
RX1-
RX2+
RX2-
3.3V
COAX SPDIF IN
OPTICAL
I2C_ADD=0xE0
4
3
1
J5
SPDIF-IN
SDOUT-USB
BCLK-USB
LRCLK-USB
0.1µF
16V
C24
GND
S2
SPDIF-RESET
SPDIF
SPDIF-RESET
LRCLK-SRC
SDOUT-SRC
SDA
I2C SCL
I2S
USB-SPDIF
SPDIF
IN
VCC 1
GND 2
VOUT 3
NC
4
NC
5
U4
SPDIF-IN
GND
SCLK-SRC
LRCLK-SRC
SDOUT-SRC
MCLK-SRC
SCLK-SRC
LRCLK-PSIA
MCLK-PSIA
BCLK-PSIA
SDIN-PSIA
GND GND
3.3V
MCLK-MUX
GND GND
3.3V
BCLK-MUX
GND GND
3.3V
LRCLK-MUX
GND GND
3.3V
SDIN-MUX
GND GND
RESET
SPDIF-RESET
1.00k
R20
4.99k
R22
3.3V 3.3V
SDA-SRC
SCL-SRC
SDOUT-USB
LRCLK-USB
BCLK-USB
EXTERNAL I2S (AIB) 3.3V 12V
3.3V
LRCLK-EXT
DIN-EXT
MCLK-EXT
BCLK-EXT
LRCLK-EXT
DIN-EXT
PVDD
FAULT
SRC POWER NODES ON POWER SUPPLY PA GE
(U7B)
FROM
DUT
PSIA CLOCK SELECT
MCLK-EXT
BCLK-EXT
CLIP_OTW
0
R28
OUT-A
OUT-B
OUT-D
OUT-C
OUT-COUT-D
OUT-B
OUT-A
0
R26
0
R27
SCL-AIB
SDA-AIB
SDOUT
BlueD2
SPDIF-LOCK
0.1µF
C59
3.3V
GND
0.1µF
C69
3.3V
GND
0.1µF
C70
3.3V
GND
0.1µF
C108
3.3V
GND
PVDD-EXT
A
1
B
2
Y3
GND
4
Y5
A/B
6
G7
VCC 8
U9
SN74LVC2G157DCTR
A
1
B
2
Y3
GND
4
Y5
A/B
6
G7
VCC 8
U11
SN74LVC2G157DCTR
A
1
B
2
Y3
GND
4
Y5
A/B
6
G7
VCC 8
U13
SN74LVC2G157DCTR
A
1
B
2
Y3
GND
4
Y5
A/B
6
G7
VCC 8
U14
SN74LVC2G157DCTR
MUX_CTRL
MUX_CTRL
MUX_CTRL
MUX_CTRL
GND
3.3V
I2S
MCLK
SCLK
LRCK
SDIN
49.9
R17
49.9
R18
49.9
R21
49.9
R24
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
INTERBOARD
GND
SDA
1 2
3 4
5 6
7 8
9 10
11 12
13 14
J9
I2X
MCLK-IBC
BCLK-IBC
LRCLK-IBC
SDIN-IBC
CONNECTOR
MCLK-IBC
BCLK-IBC
LRCLK-IBC
SDIN-BUF
MUX_CTRL
MSP430 I2S-BUF-EN
I2S-BUF-EN
DECOUPLING
0.1µF
C110
3.3V
GND
0.1µF
C111
3.3V
GND
0.1µF
C112
3.3V
GND
0.1µF
C113
3.3V
GND
0.1µF
C114
3.3V
GND
0.1µF
C115
3.3V
GND
0.1µF
C116
3.3V
GND
0.1µF
C117
3.3V
GND
10.0kR119
10.0kR121
10.0kR122
GND
3.3V
A0-SRC
A1-SRC
3.3V
10.0k
R123
GND
10.0kR120
100k
R115
GND
100k
R116
GND
100k
R117
GND
100k
R118
GND
GND
GND
GND
GND
CLIP_OTW
FAULT
RST-AIB
MCLKI
VDD
4
OE/STANDBY
1GND 2
OUT 3
24.576MHz
Y2
VDD
4
OE/STANDBY
1GND 2
OUT 3
22.5792MHz
Y3
FREQ SELECT FREQ-SEL
0
R130
GND
GND
3.3V
3.3V
2 4
5
3
U27
LVC1G14
3.3V
GND
FREQ-SEL
0
R132
2 4
5
3
U28
LVC1G14
3.3V
GND
I2S-BUF-EN
0.1µF
C118
3.3V
GND
0.1µF
C119
3.3V
GND
0.1µF
C120
3.3V
GND
0.1µF
C121
3.3V
GND
0.1µF
C122
3.3V
GND
0.1µF
C123
3.3V
GND
J34
GND
ALIGNMENT
HEADER
AIB
NC
5
U18B
LVC1G125DSF
1
2
3
4
6
U18A
LVC1G125DSF
NC
5
U20B
LVC1G125DSF
NC
5
U22B
LVC1G125DSF
NC
5
U24B
LVC1G125DSF
1
2
3
4
6
U20A
LVC1G125DSF
1
2
3
4
6
U22A
LVC1G125DSF
1
2
3
4
6
U24A
LVC1G125DSF
NC
5
U19B
LVC1G125DSF
NC
5
U21B
LVC1G125DSF
NC
5
U23B
LVC1G125DSF
NC
5
U25B
LVC1G125DSF
1
2
3
4
6
U19A
LVC1G125DSF
1
2
3
4
6
U21A
LVC1G125DSF
1
2
3
4
6
U23A
LVC1G125DSF
1
2
3
4
6
U25A
LVC1G125DSF
TO MSP430
GPIO_AIB-1
RST-AIB
GPIO_AIB-2
MUTE-AIB
GPIO_AIB-1
GPIO_AIB-2
MUTE-AIB
SDOUT
1 2 3
J30
J9 DATA SEL
SDIN-BUF
SDIN-IBC
FROM DUT
0
R11
3.3V
0
R12
GND
1
2
3
J3
GND
SCL
1
2
3
J6
GND
1
2
3
J4
GND
1
2
3
J7
GND
1
3
56
4
2
7
910
8
12 11
14 13
16 15
18 17
20 19
22 21
24 23
26 25
28 27
J28
560
R19
RXCKO
FREQ-SEL
GND GND
3.3V
A
1
B
2
Y3
GND
4
Y5
A/B
6
G7
VCC 8
U31
SN74LVC2G157DCTR
J1
MCLK-SEL
GND
10.0kR66
3.3V
A0-SRC
GreenD3
SPDIF-READY
3.3V
1.00k
R23
A0-SRC
I2S-BUF-EN
MUX_CTRL
SPDIF-RESET
10.0k
R25
0
R168 I2S-BUF-EN
SDA
SCL
0
R131
MCLK-SEL MCLK-SEL
MCLK-SEL
0R169
0
R170
SDA
SCL SCL-SRC
SDA-SRC
SDA
SCL
SDA
SCL
MCLK-XTAL
0.1µF
C156
3.3V
GND
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TAS3251 Evaluation Module
ADVANCE INFORMATION
Figure 6. TAS3251EVM Schematics (3 of 6)

MCLK
SCLK
LRCK
SDIN
I2S
2.2µF
C75
MODE
ADR
MSP430
MODE
SDA
I2C SCL SCL
SDA
ADR
OUTRP
OUTRN
OUTLP
OUTLN
IN_A
IN_B
IN_D
IN_C
DAC OUTPUT
DAC
FROM
0.033µF
C66
0.033µF
C68
0.033µF
C76
0.033µF
C77
OUT_D
OUT_C
OUT_B
OUT_A
MCLK
SCLK
LRCK
SDIN
0.1uF
C36
GND
0
R31 GVDD_AB
0.1uF
C44
GND
0
R36 GVDD_CD
1µFC65
GND
1µFC63
TP13
DVDD
TP11
AVDD
TP12
DAC-AVDD
TP9
GVDD-AB
TP10
GVDD-CD
3.3V
0.1µF
C72
GND GND
10µF
C71
0.1µF
C73
GND
GND
OSCILLATOR
SYNC
INTERFACE
4
1
2
3
J23
OSC-IOM
OSC-IOP
OSC-IOM
OSC-IOP
C_START
GND
OUTA
GND
OUTB
GND
OUTC
GND
OUTD
MONITORS
FAULT
CLIP_OTW
CLIP_OTW
FAULT
3.3V
SLAVE MODE
20.0kR76
MASTER MODE (600kHz)
MASTER MODE AM1 (500kHz)
MASTER MODE AM2 (450kHz)
GND FREQUENCY ADJUST
12
34
56
78
J22
FREQ_ADJ
GND
I2C ADDRESS
ADRJ19
ADR
J14
MODE
MODE GND
MODE
GND
PVDD
GNDGND
TP7 PVDD-CD
1µF
100V
C28
1µF
100V
C29
GND
PVDD
GNDGND
TP8 PVDD-AB
1µF
100V
C41
1µF
100V
C42
22.0k
R74
TP14
OC-ADJ OC_ADJ
GND
OUT-A
OUT-B
OUT-D
OUT-C
TO
AIB
GND
ZOBEL NETWORK
POST FILTER FEEDBACK
1µF
100V
C98
GND
1µF
100V
C104
GND
1µF
100V
C103
GND
1µF
100V
C105
30.0kR75
10.0k
R77
0.1µF
C61
GNDGND
3.3V
10µF
C60
10.0k
R90
3.3V
10.0kR91
100k
R88
499
R95
499
R98
1000pF
C62
GND
100k
R65
GND
100k
R64
499
R67
499
R69
1000pF
C106
GND
100k
R59
GND
INC
IND
INA
INB
2200µF
C30
2200µF
C43
Black
J13
GNDAB
Black
J21
GNDCD
GND
GND
CLIP_OTW
FAULT
TO
MSP430/AIB
HEATSINK
0
R99
IN_D
IN_C
J31
INC
GND
0
R100
J32
IND
GND
SHUNT FOR PBTL
1
µF
C107
GND
DAC_MUTE
RESET-AMP
3.3V
DAC-RESET
AVDD
DVDD
0
R125
0
R126
0
R127
0
R128
GND
GND
0.047µF
C78
0
R101
3.3V
GND
0
R102
RESET-AMP
DAC_MUTE
J20
GVDD
DAC-RESET
OUTPUT
SDOUT TO IBC
SDOUT
22pF
C7
18.0k
R15 10µF
C5
2.00k
R29
GND
220pF
C6
0
R13
0
R30
0
R61
0
R72
0
R14
0R33
0R68
0R73
IN_D
22pFC10
18.0k
R35 10µF
C8
2.00k
R37
GND
220pF
C9
IN_C
22pF
C13
18.0k
R70 10µF
C11
2.00k
R71
GND
220pF
C12
IN_B
22pFC16
18.0k
R96 10µF
C14
2.00k
R97
GND
220pF
C15
IN_A
OUTA
OUTB
OUTC
OUTD
DAC OUTPUT
DAC OUTPUT
DAC OUTPUT
7uH 6.5A
L5
MA5173
7uH 6.5A
L6
MA5173
7uH 6.5A
L7
MA5173
7uH 6.5A
L8
MA5173
0.68µF
250V
C47
0.68µF
250V
C67
0.68µF
250V
C79
0.68µF
250V
C81
3.30
R87
3.30
R89
3.30
R93
3.30
R94
12V GVDD
GVDD
GVDD
GND
DAC_AVDD
56
BST_A 44
BST_B 43
BST_C 32
BST_D 31
C_START 24
FAULT 28
FREQ_ADJ 18
GND 22
GND 13
GND 33
GND 42
GVDD_AB
12
GVDD_CD
30
IN_A
15
IN_B
16
IN_C
25
IN_D
26
OC_ADJ
17
OSC_IOM
19
OSC_IOP
20
CLIP_OTW 29
OUT_A 41
OUT_B 39
OUT_C 36
OUT_D 34
PVDD_AB
40
PVDD_CD
35
RESET_AMP
27 MODE
14
AVDD
23
SDA
54 SCL
53
ADR
46
MCLK
50
SDIN
48 LRCK
47
SDOUT 51
DAC_DVDD
9
CP
8
CN
6
OUT_RN 2
GND 7
OUT_RP 1
DGND 10
GND 37
AGND 55
GND 38
DVDD
21
OUT_LP 4
OUT_LN 3
CPVSS 5
DVDD_REG
11
SCLK
49
DAC_DVDD
52
DAC_MUTE
45
U8
TAS3251DKQR
TP2 MCLK
TP3 BCLK
TP4 LRCLK
TP1 SDIN
OUT_A
OUT_B
OUT_C
OUT_D
1000pF
C152
GND
1000pF
C153
GND
1000pF
C154
GND
1000pF
C155
GND
0
R165
0
R166
560
R79
Red
D10 FAULT
3.3V
560
R78
3.3V
Orange
D9 CLIP_OTW
TP15
CLIP_OTW
TP16
FAULT
J10
OUTAB
J15
OUTCD
TP17 OUTA
TP18 OUTB
TP20 OUTD
TP19 OUTC
H1
GND
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SLAU757–January 2018
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TAS3251 Evaluation Module
ADVANCE INFORMATION
Figure 7. TAS3251EVM Schematics (4 of 6)

IN
1OUT 3
GND 2 TAB
4
U15
LM2940IMP-12/NOPB
0.47µF
C83
GND
GNDGND
PVDD
GND
0.01µF
100V
C33
PVDD MAX = 36V
47µF
63V
C31
15V
10µF
C85
GNDGND GND
100µF
C86
J29
3.3V
0.1uF
C84
GND GND
GND
12V
47µF
C39
J27
12V 499
R86
GND
Green
D14
3.3V
3.3V
1.50k
R85
GND
Green
D13
12V
12V
GND
1A
D12
0.047µF
C26
0.1uF
C22
GND
4700pF
C35
182k
R34
5600pF
C34
4.99k
R58
1.00k
R84
GND
3A
D11
GND
GND
VCC 9
SS
7
SW 1
FB 6 RTN
5
VIN
10
BST 2
RON/SD
8
DAP 11
ISEN 3
SGND
4
U10
LM5010ASD/NOPB
PVDD
GND GND
Hi Current Shunt
15V
J26
PVDD-IN
15V-VR
100µH 1.5A
L9
0.1µF
100V
C25
1µF
100V
C32
2.2µF
100V
C23
4.7µF
25V
C38
3.3V
GND
0.1µF
C88
10µF
C87
GND
GND
0.1µF
C94
GND
GND
0.1µF
C90
GND
1.8V
0.1µF
C89
GND
3.3V
3.3V
VCC
9
AGND 10
DGND1 16
VDD18
17
DGND2 30
VDD33
33
VIO
42
DGND3 43
BGND 44
U7B
SRC4392IPFBR
10µF
C93
SRC POWER
VIN-PS
SW-PS
15V
1
2
3
J8
5V SEL 5V
5V-USB5V-VR
PGND 1
VIN
2
EN
3
AGND 4
FB 5
VOS 6
SW 7
PG
8
EP 9
U16
TPS62163DSGR
5V-VR
22µF
C1
GND
100k
R4
2.2uH
L3
IN1
1
IN1
2
GND 3
IN2
4
IN2
5
EN2
6
NR/SS2
7
SS_CTRL2
8PG2 9
FB2 10
OUT2 11
OUT2 12
GND 13
OUT1 14
OUT1 15
FB1 16
PG1 17 SS_CTRL1
18
NR/SS1
19
EN1
20
PAD 21
TPS7A8801RTJR
U17 3.3V
1.8V
10.7k
R7
GND
GND
33.2k
R6
22µF
C92
11.0k
R9
GND
13.7k
R8
22µF
C3
1µFC95
1µFC4
GND
5V
10µF
C91
10µF
C2
5V
TP5
5V-IN
TP6
GND
GND
1A
D17
SW
J24
PVDD
J25
Schematic and Bill of Materials www.ti.com
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TAS3251 Evaluation Module
ADVANCE INFORMATION
Figure 8. TAS3251EVM Schematics (5 of 6)