AVDD
2
3
6
7
4
U2
OPA350
R1
10K
AVDD
AVDD
C4
100U TA
AVDD
DVDD
VOLTAGE REFERENCE FILTER CAPACITORS C3-C5
C3: 1UF MLCC, 0805 PKG
MURATA
KEMET C0805C105K4RACTU
INSTALL EITHER C4 OR C5
C4: 100UF LOW ESR TANTALUM
KEMET "KO-CAP" T520D107M010AS4350
C5: 22UF MLCC
MURATA
KEMET
PANASONIC
AVDD
1
AGND
2
VRN
3
VRP
4
AINCOM
5
AIN0
6
AIN1
7
AIN2
8
AIN3
9
AIN4
10
AIN5
11
AIN6
12
AIN7
13
SYNC/PDWN
14
RESET
15
DVDD
16
DGND
17
XTAL2
18
XTAL1/CLKIN
19
CS
20
DRDY
21
DOUT
22
DIN
23
SCLK
24
D0/CLKOUT
25
D1
26
D2
27
D3
28
U1
ADS1256
AN0+
2
AN1+
4
AN2+
6
AN3+
8
AN4+
10
AN5+
12
AN6+
14
AN7+
16
REF-
18
REF+
20
AGND
17
AGND
19
AN0-
1
AN1-
3
AN2-
5
AN3-
7
AGND
9
AGND
11
AGND
13
VCOM
15
J1
ANALOGHDR
1
2
3
4
J5
HEADER-4
RA3
100
CS
SCLK
DIN
DOUT
DRDY
SYNC/PDWN
RESET
D0
D1
D2
D3
CLKX
FSX
DX
DR
INT
TOUT
GPIO5
GPIO4
D0C
D1C
D2C
D3C
S3
ESW_EG2305A
S1
ESW_EG2305A
C18
1U
C13
DNP
C12
DNP
C1
10nF
C15
DNP
C14
DNP
S2
ESW_EG2305A
C2
10nF
C17
DNP
C16
DNP
AVDD
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AINCOM
OBREF
AN1+
AN1-
AN0+
AN0-
REF-
REF+
VRP
VRN
ADCAVDD
ADCDVDD
A0
1
A1
2
GND
4
SDA
5
SCL
6
WP
7
VCC
8
A2
3
U4
MCP_24AA256-I/SN
AGNDIN
DGNDIN
X1
7.68MHZ
C21
18P
C22
18P
S4
NKK_SS12SDP2
C19
4U7
C20
4U7
DVDD
SDA
SCL
C10
10nF
C7
10nF
C8
DNP
C6
DNP
C11
DNP
C9
DNP
EXTCLK
CLKIN
XTAL2
RA1
100
RA2
100
RA4
100K
C5: OPTIONAL MLCC REF CAP
CNTL
1
CLKX
3
CLKR
5
FSX
7
FSR
9
DX
11
DR
13
INT
15
TOUT
17
GPIO5
19
GPIO0
2
DGND
4
GPIO1
6
GPIO2
8
DGND
10
GPIO3
12
GPIO4
14
SCL
16
DGND
18
SDA
20
J2
SERIALHDR
+3.3VIN
+1.8VIN
1
2
3
J6
SYNC/PDWN
1
2
3
J7
RESET
1
2
3
J8
CS
DVDD
DVDD
R2
47k
R3
47k
-VA
2
-5VA
4
AGND
6
VD1
8
+5VD
10
+VA
1
+5VA
3
DGND
5
+1.8VD
7
+3.3VD
9
J3
POWERHDR
VIN
2
VOUT
6
TRIM
5
GND
4
TEMP
3
U3
REF5025
C3
1U 16V X7R
C23
0.1uF
C24
0.1uF
C5
DNP
1 2
3 4
J4
JPR-2X2
1 2
3 4
5 6
J10
JPR-2X3
1 2
J9
JPR-2X1
Schematics and Layout
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40
SBAU090E–November 2003–Revised November 2018
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Copyright © 2003–2018, Texas Instruments Incorporated
ADS1256EVM and ADS1256EVM-PDK
Figure 41. Schematic
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