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Digital Interface
3 Digital Interface
The ADS9218 uses an SPI interface to configure the registers (SCLK, SDI, SDO, CS, and SPI_EN).
The ADS9218 uses two LVDS interfaces for capturing conversion data for each ADC channel (DOUTP_A,
DOUTM_A, DOUTP_B, and DOUTM_B). The SPI and LVDS signals connect to the FMC connector. The FMC
connector signal definition is given in
scope measurements. Top overlay text indicates the location of these test points.
J27A
A1
A1
A2
A2
A3
A3
A4
A4
A5
A5
A6
A6
A7
A7
A8
A8
A9
A9
A10
A10
A11
A11
A12
A12
A13
A13
A14
A14
A15
A15
A16
A16
A17
A17
A18
A18
A19
A19
A20
A20
A21
A21
A22
A22
A23
A23
A24
A24
A25
A25
A26
A26
A27
A27
A28
A28
A29
A29
A30
A30
A31
A31
A32
A32
A33
A33
A34
A34
A35
A35
A36
A36
A37
A37
A38
A38
A39
A39
A40
A40
ASP-134486-01
GND
GND
J27B
B1
B1
B2
B2
B3
B3
B4
B4
B5
B5
B6
B6
B7
B7
B8
B8
B9
B9
B10
B10
B11
B11
B12
B12
B13
B13
B14
B14
B15
B15
B16
B16
B17
B17
B18
B18
B19
B19
B20
B20
B21
B21
B22
B22
RESETz
B23
B23
B24
B24
B25
B25
B26
B26
B27
B27
B28
B28
B29
B29
B30
B30
B31
B31
B32
B32
B33
B33
B34
B34
B35
B35
B36
B36
B37
B37
B38
B38
B39
B39
B40
B40
ASP-134486-01
GND
GND
8
ADS9218EVM-PDK Evaluation Module
Figure
3-1. These signals are also available on tented via test points for
J27C
C1
C1
C2
C2
C3
C3
C4
C4
C5
C5
C6
C6
C7
C7
C8
C8
C9
C9
C10
C10
C11
C11
C12
C12
DCLKP
C13
C13
DCLKM
C14
C14
C15
FCLKP
C15
C16
FCLKM
C16
C17
C17
C18
C18
C19
C19
C20
C20
C21
C21
C22
C22
C23
C23
C24
C24
C25
C25
C26
C26
C27
C27
C28
C28
C29
C29
C30
C30
C31
C31
C32
C32
C33
C33
C34
C34
C35
C35
C36
C36
C37
C37
C38
C38
C39
C39
C40
C40
ASP-134486-01
GND
J27D
D1
D1
D2
D2
D3
D3
D4
D4
D5
D5
D6
D6
D7
D7
D8
D8
D9
SPI_EN
D9
D10
D10
D11
PWDNz
D11
FX3_I2C_SCL
D12
D12
FX3_I2C_SDA
D13
D13
D14
D14
D15
D15
D16
D16
D17
D17
D18
D18
D19
D19
D20
D20
D21
D21
D22
D22
D23
D23
D24
D24
D25
D25
D26
D26
D27
D27
D28
D28
D29
D29
D30
D30
D31
D31
D32
D32
D33
D33
D34
D34
D35
D35
D36
D36
D37
D37
D38
D38
D39
D39
D40
D40
ASP-134486-01
GND
Figure 3-1. FMC Connector Signals Definition
Copyright © 2022 Texas Instruments Incorporated
J27E
J27G
E1
G1
E1
G1
E2
G2
E2
G2
E3
G3
E3
G3
E4
G4
E4
G4
E5
G5
E5
G5
E6
G6
E6
G6
E7
G7
E7
G7
E8
G8
E8
G8
E9
G9
E9
G9
E10
G10
E10
G10
E11
G11
E11
G11
E12
G12
E12
G12
E13
G13
E13
G13
E14
G14
E14
G14
E15
G15
E15
G15
E16
G16
E16
G16
E17
G17
E17
G17
E18
G18
E18
G18
E19
G19
E19
G19
E20
G20
E20
G20
E21
G21
E21
G21
E22
G22
E22
G22
E23
G23
E23
G23
E24
G24
E24
G24
E25
G25
E25
G25
E26
G26
E26
G26
E27
G27
E27
G27
E28
G28
E28
G28
E29
G29
E29
G29
E30
G30
E30
G30
E31
G31
E31
G31
E32
G32
E32
G32
E33
G33
E33
G33
E34
G34
E34
G34
E35
G35
E35
G35
E36
G36
E36
G36
E37
G37
E37
G37
E38
G38
E38
G38
E39
G39
E39
G39
E40
G40
E40
G40
ASP-134486-01
ASP-134486-01
GND
J27F
J27H
F1
H1
F1
H1
F2
H2
F2
H2
F3
H3
F3
H3
F4
H4
F4
H4
F5
H5
F5
H5
F6
H6
F6
H6
F7
H7
F7
H7
F8
SPRW_SUP_1P8
H8
F8
H8
F9
H9
F9
H9
F10
SPRW_SUP_1P8
H10
F10
H10
F11
H11
F11
H11
F12
H12
F12
H12
F13
H13
F13
H13
F14
H14
F14
H14
F15
SPRW_SUP_2P5
H15
F15
H15
F16
H16
F16
H16
F17
SPRW_SUP_2P5
H17
F17
H17
F18
H18
F18
H18
F19
H19
F19
H19
F20
H20
F20
H20
F21
H21
F21
H21
SPRW_SUP_3P3
F22
H22
F22
H22
F23
H23
F23
H23
SPRW_SUP_3P3
F24
H24
F24
H24
F25
H25
F25
H25
F26
H26
F26
H26
F27
H27
F27
H27
F28
H28
F28
H28
F29
H29
F29
H29
F30
H30
F30
H30
F31
H31
F31
H31
F32
H32
F32
H32
F33
H33
F33
H33
F34
H34
F34
H34
F35
H35
F35
H35
F36
H36
F36
H36
F37
H37
F37
H37
F38
H38
F38
H38
F39
H39
F39
H39
F40
H40
F40
H40
ASP-134486-01
ASP-134486-01
GND
www.ti.com
J27I
SDI
J1
J1
SCLK
J2
J2
CSz
J3
J3
SDO
J4
J4
J5
J5
J6
J6
SMPL_SYNC
J7
J7
D3
J8
J8
J9
J9
J10
J10
J11
J11
D2
J12
J12
J13
J13
FPGA_SMPL_CLKP
J14
J14
J15
J15
D1
J16
J16
J17
J17
J18
J18
J19
J19
D0
J20
J20
J21
J21
FCLKOUT
J22
J22
J23
J23
DCLKOUT
J24
J24
J25
J25
J26
J26
J27
J27
J28
J28
J29
J29
J30
J30
J31
J31
J32
J32
J33
J33
J34
J34
J35
J35
J36
J36
J37
J37
J38
J38
J39
J39
J40
J40
ASP-134486-01
GND
J27J
K1
K1
K2
K2
K3
K3
K4
K4
K5
K5
K6
K6
K7
K7
K8
K8
K9
K9
K10
K10
K11
K11
K12
K12
DOUTP_B
K13
K13
DOUTM_B
K14
K14
K15
K15
DOUTP_A
K16
K16
DOUTM_A
K17
K17
K18
K18
K19
K19
K20
K20
K21
K21
K22
K22
K23
K23
K24
K24
K25
K25
K26
K26
K27
K27
K28
K28
K29
K29
K30
K30
K31
K31
K32
K32
K33
K33
K34
K34
K35
K35
K36
K36
K37
K37
K38
K38
K39
K39
K40
K40
ASP-134486-01
GND
SBAU409 – SEPTEMBER 2022
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