Texas Instruments ADS131B26Q1EVM-PDK, User Manual

Page: 30 / 36

A0
1
A1
2
A2
3
VSS
4
SDA
5
SCL
6
WP
7
VCC
8
U5
BR24G32FVT-3AGE2
ISO_GND
EVM_ID_PWR EVM_ID_PWR EVM_ID_PWR
ISO_GND 0.1uF
C36
0.1uF
C41
ISO_GND
10k
R98
EVM_ID_SCL
EVM_ID_SDA
WP
ISO_GND
ISO_3V3
0.1µF
C38
ISO_GND
ISO_GND
ISO_3V3
0.1µF
C39
ISO_GND
0
R100
XFMR_CLK
1
2 3 4 5
J10
EXT_CLK
ISO_GND
ISO_GND
VDD
4
OE
1
GND
2
CLOCK OUT
3
Y1
ISO_3V3
1.00k
R104
ISO_3V3
JP5
OSC_EN
ISO_GND
0.1µF
C43
ISO_GND
ISO_ADC_CLK
VCC
2
CLK
6
D1
1
D2
3
EN
5
GND
4
SN6505BQDBVTQ1
U6
ISO_3V3
0
R96
ISO_VCC
ISO_VCC
ISO_VCC
ISO_GND
ISO_GND
ISO_GND
DGND
VADC_HV
0.1µF
C30
DGND
0
R99
DNP
ISO_GND
0.1µF
C37
D2
RB168MM-40TR
D1
RB168MM-40TR
XFMR_CLK
1.00k
R95
ISO_VCC
JP4
XFMR_EN
VCC1
1
INA
2
INB
3
INC
4
IND
5
INE
6
OUTF
7
GND1
8
GND2
9
OUTD
12
OUTC
13
OUTB
14
OUTA
15
VCC2
16
OUTE
11
INF
10
ISO7761FQDWQ1
U4
DRDY
GPIO2/FAULT
GPIO3/OCCA
GPIO4/OCCB
RESET
GPIO1
ADC DIGITAL
DGND
ISO_GPIO2/FAULT
ISO_GPIO1
ISO_DRDY
ISO_GPIO3/OCCA
ISO_GPIO4/OCCB
ISO_SDO
ISO_GPIO0/MHD
DGND
GPIO0/MHD
CLK
SCLK
CS
SDO
SDI
ADC DIGITAL
ADC_IOVDD ISO_3V3
ISO_GND
ISO_GND
QTH-030-01-L-D-A
1
1
3
3
5
5
7
7
9
9
11
11
13
13
15
15
17
17
19
19
21
21
23
23
25
25
27
27
29
29
31
31
33
33
35
35
37
37
39
39
41
41
43
43
45
45
47
47
49
49
51
51
53
53
55
55
57
57
59
59
2
2
4
4
6
6
8
8
10
10
12
12
14
14
16
16
18
18
20
20
22
22
24
24
26
26
28
28
30
30
32
32
34
34
36
36
38
38
40
40
42
42
44
44
46
46
48
48
50
50
52
52
54
54
56
56
58
58
60
60
GND
MP1
GND
MP2
GND
MP3
GND
MP4
J9
ISO_GND ISO_GND
EVM_RAW_5V
ISO_3V3
ISO_GND
Digital Interface
EVM_ID_PWR
0 R103
ISO_GND
EVM_ID_SCL
EVM_ID_SDA
0 R101 0 R102
ISO_GND
WP
EVM_REG_5V5
ISO_GND
ISO_SDI
ISO_CS
ISO_SCLK
ISO_DRDY
ISO_RESET
ISO_GPIO2/FAULT
ISO_GPIO1
ISO_GPIO0/MHD
EVM_RAW_5V
0
R97
DNP
0.1µF
C31
DGND
0.1µF
C33
ISO_GND
ADC_IOVDD ISO_3V3
0.1µF
C32
DGND
0.1µF
C34
ISO_GND
VCC1
1
INA
2
INB
3
INC
4
IND
5
INE
11
INF
10
GND1
8
GND2
9
OUTD
12
OUTC
13
OUTB
14
OUTA
15
VCC2
16
OUTE
6
OUTF
7
ISO7762FQDWQ1
U3
TP8
ISO_VCC
2
6
3
1
4
5
T1
750313769
ISO_RESET
ISO_SDI
ISO_SCLK
ISO_CS
ISO_ADC_CLK
1CLK
1
1D
2
1Q
7
SN74AUP2G80DCUR
U8A
1CLK
1
1D
2
1Q
7
SN74AUP2G80DCUR
U7A
2CLK
5
2D
6
2Q
3
SN74AUP2G80DCUR
U7B
VCC
8
GND
4
SN74AUP2G80DCUR
U8C
VCC
8
GND
4
SN74AUP2G80DCUR
U7C
2CLK
5
2D
6
2Q
3
SN74AUP2G80DCUR
U8B
33.0 R88
33.0 R87
33.0 R86
33.0 R85
33.0 R84
33.0 R83
33.0 R89
33.0 R90
33.0 R91
33.0 R92
33.0 R93
33.0 R94
ISO_GPIO3/OCCA
ISO_GPIO4/OCCB
10uF
C42
10uF
C40
10uF
C35
10uF
C29
1µF
C44
1µF
C45
ISO_SDO
ADC_DIGITAL
ADC_DIGITAL
Is
o
la
ti
o
n
B
a
rr
ie
r
ISO_CAPCLK
VADC_HV:
1. VCC = 3.3 V (3V3_IOVDD),
VADC_HV = 5.61 V
2. VCC = 5 V (EVM_RAW_5V)
VADC_HV = 8.5 V
Internal SN6505B fsw = 420 kHz when
XFMR_CLK is floating.
ADC fmod is 4.096 MHz with CLK = 8.192 MHz.
Suggest clocking transformer driver at CLK / 16 =
512 kHz (SN6505B uses internal XFMR_CLK / 2
-> fsw = 256 kHz).
Populate 0-ohm to ISO_GND on CLK pin for
SN6501.
ISO776x "F" devices
default output LOW
Figure 7-8. Digital Isolators, DC/DC Power Supply, External Clock, and PHI Controller
ADS131B26Q1EVM-PDK Bill of Materials, PCB Layout, and Schematics www.ti.com
30 ADS131B26Q1EVM-PDK Evaluation Module SBAU413 – OCTOBER 2022
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