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Texas Instruments ADS1278-SP User Manual Download Page 25

2200pF

C8

2200pF

C9

2200pF

C10

2200pF

C12

AGND

AGND

AGND

AGND

AGND

AGND

AGND

AGND

CHAN-N5

CHAN-N6

CHAN-N7

CHAN-N8

CHAN-P5

CHAN-P6

CHAN-P7

CHAN-P8

10.0k

R34

4.3k

R35

PW

DN

1

PW

DN

2

PW

DN

3

PW

DN

4

PW

DN

5

PW

DN

6

PW

DN

7

PW

DN

8

DGND

IOVDD

DGND

S

D

A

DGND

IOVDD

DGND

GP

IO

0

GP

IO

1

GP

IO

2

GP

IO

3

GP

IO

4

DGND

IOVDD

DGND

DGND

C

L

K

D

IV

DGND

IOVDD

DGND

PW

DN

1

PW

DN

2

PW

DN

3

PW

DN

4

PW

DN

5

PW

DN

6

PW

DN

7

PW

DN

8

GP

IO0

GP

IO1

GP

IO2

GP

IO3

GP

IO4

DGND

IOVDD

DGND

IOVDD

1

2

3

4

5

6

7

8

9

10

J1

0

R4

0

R5

0

R6

0

R7

0

R8

0

R9

0

R10

0

R11

1
2
3
4
5
6

7

8

9

10

11

12

S2

1
2
3
4
5
6

13

14

15

16

7

12

8

9

10

11

S1

100k

1

2

3

4

5

6

7

8

9

10

1

1

12

13

14

15

16

R32

100k

1

2

3

4

5

6

7

8

9

10

1

1

12

13

14

15

16

R33

A0

1

A1

2

A2

3

VSS

4

SDA

5

SCL

6

WP

7

VCC

8

U14

24AA256-I/ST

TCA9535RTWR

P

00

1

P

01

2

P

02

3

P

03

4

P

04

5

P

05

6

P

06

7

P

07

8

G

N

D

9

P

10

1

0

P

1

1

1

1

P

12

1

2

P

13

1

3

P

14

1

4

P

15

1

5

P

16

1

6

P

17

1

7

A

0

18

S

C

L

19

S

DA

20

V

CC

21

IN

T

22

A

1

23

A

2

24

E

P

2

5

U7

TCA9535RTWR

P

00

1

P

01

2

P

02

3

P

03

4

P

04

5

P

05

6

P

06

7

P

07

8

G

N

D

9

P

10

1

0

P

1

1

1

1

P

12

1

2

P

13

1

3

P

14

1

4

P

15

1

5

P

16

1

6

P

17

1

7

A

0

18

S

CL

19

S

DA

20

V

CC

21

IN

T

22

A

1

23

A

2

24

E

P

2

5

U8

CHAN-N[5..8]

CHAN-N[5..8]

CHAN-P[5..8]

CHAN-P[5..8]

CL

K

D

IV

PWDN[1..8]

PWDN[1..8]

S

C

L

S

DA

S

C

L

GPIO[0..4]

GPIO[0..4]

S

W_IN

D

SDA

SCL

Channels 5-8 Analog Connections

GPIO/Logic Connections

0.1uF

C29

0.1uF

C38

0.1uF

C40

0.1uF

C58

1500pF

C30

1500pF

C31

1500pF

C32

1500pF

C33

1500pF

C34

1500pF

C35

1500pF

C36

1500pF

C37

www.ti.com

Schematic and Bill of Materials

25

SBAU324 – September 2018

Submit Documentation Feedback

Copyright © 2018, Texas Instruments Incorporated

ADS1278EVM-CVAL Evaluation Module User's Guide

Figure 15. Schematic04

Summary of Contents for ADS1278-SP

Page 1: ...P a 24 bit radiation hardened 8 channel delta sigma analog to digital converter ADC This document includes an EVM QuickStart hardware and software details bill of materials and schematic The following...

Page 2: ...ion Module Kit above When used with the MMB0 EVM the ADS1278 SP can be evaluated quickly using software GUI ADCPro As a standalone PCB the ADS1278EVM CVAL is useful for prototyping designs and firmwar...

Page 3: ...Quick Start This section provides a QuickStart guide to quickly begin evaluating the ADS1278EVM CVAL with ADCPro 2 1 Default Jumper Switch Configuration Figure 1 and Table 2 show the factory default...

Page 4: ...re control S3 INT Left On board voltage reference selected S4 Header connected to converter Left Channel 4 header connected to converter not buffered S5 Header connected to converter Left Channel 3 he...

Page 5: ...CVAL to MMB0 EVM through connectors J3 J4 and J5 CAUTION Do not misalign the pins when plugging the ADS1278EVM CVAL into the MMB0 Check the pin alignment of J3 J4 and J5 carefully before applying powe...

Page 6: ...n in Figure 5 Remove jumper JP3 Power down Buffer Set switches S8 to right position to enable buffers in analog input signal paths Using jumper cable ground the complementary analog input of Channel 1...

Page 7: ...yright 2018 Texas Instruments Incorporated ADS1278EVM CVAL Evaluation Module User s Guide Figure 5 EVM Setup AC Testing Channel 1 On the EVM plug in GUI select the SETTINGS tab set the Operating Mode...

Page 8: ...ng Mode to High Resolution In ADCPro select the MultiScope plug in in the Test drop down menu as shown in Figure 7 Figure 7 Select Test MultiScope In ADCPro select the Continuous button to begin conti...

Page 9: ...ick Start 9 SBAU324 September 2018 Submit Documentation Feedback Copyright 2018 Texas Instruments Incorporated ADS1278EVM CVAL Evaluation Module User s Guide Figure 8 Multichannel Scope Capture of Ana...

Page 10: ...connect to J3 and provisions are provided to buffer these signals before being connected to the converter Switches S4 S5 S7 and S8 control whether the buffered or unbuffered signal is connected to the...

Page 11: ...m Quick Reference 11 SBAU324 September 2018 Submit Documentation Feedback Copyright 2018 Texas Instruments Incorporated ADS1278EVM CVAL Evaluation Module User s Guide Figure 9 TP2 REFN and TP3 REFP Te...

Page 12: ...is changed on the ADS1278EVM CVAL plug in the setting immediately updates on the board Settings on the ADS1278EVM CVAL correspond to settings described in the ADS1278 SP product data sheet product da...

Page 13: ...l Enable The Master All Enable control allows for the selection of channels to convert Manual Control allows channel enable control via CH1 through CH8 selector switches All Channels Enabled and All C...

Page 14: ...maximum allowable frequency for the mode selected This clock frequency is configured in the PLL and overwrites the user entered value in the Clock Frequency indicator The Operating Mode control allow...

Page 15: ...e Table 5 Operating Modes Clock Frequency Operating Mode CLKDIV Frequency MHz High Speed 1 32 768 High Resolution 1 27 Low Power 1 27 Low Power 0 13 5 Low Speed 1 27 Low Speed 0 5 4 4 4 About Tab The...

Page 16: ...set to OFF position for use with software Power down Channel 3 Hardware control for PWDN3 set to OFF position for use with software Power down Channel 4 Hardware control for PWDN4 set to OFF position...

Page 17: ...tings The software cannot detect if the switches are changed after startup CAUTION When using the ADS1278EVM CVAL with the MMB0 motherboard the DIP switches S1 and S2 must all be switched up away from...

Page 18: ...ndary Analog Interface Pinout Description Signal Designator Signal Description Not used for this design Not Connected J1 1 1 J1 2 Not Connected Not used for this design Analog Input Channel 8 Negative...

Page 19: ...er located next to reference designator 2 DOUT1 buffered through a D flip flop See Section 5 5 3 1 below Table 9 J4 Serial Interface Header Function Signal Name Designator Signal Name Function Synchro...

Page 20: ...0 and no external supplies are required For operation as a stand alone EVM the power supplies should be connected as shown below 1 Pin 1 is bottom left hand corner located next to reference designator...

Page 21: ...Incorporated ADS1278EVM CVAL Evaluation Module User s Guide 6 Schematic and Bill of Materials This section provides EVM schematics for the ADS1278EVM CVAL as well as the bill of materials BOM Gerber...

Page 22: ...GND 11 DGND 12 DGND 26 DGND 31 DGND 32 DGND 33 DGND 34 AGND 53 AGND 54 AGND 57 AGND 60 AGND 63 AGND 66 AGND 69 AGND 72 AGND 76 TEST0 13 TEST1 14 CLKDIV 15 SYNC 16 DIN 17 CLK 37 SCLK 38 DRDY FSYNC 39 F...

Page 23: ...VIN 2 TEMP 3 GND 4 TRIM NR 5 VOUT 6 U1A REF5025AIDGKT DNC 1 NC 7 DNC 8 U1B 100 F C1 0 15 F C2 0 1uF C3 1 F C4 1 F C6 www ti com Schematic and Bill of Materials 23 SBAU324 September 2018 Submit Docume...

Page 24: ...IDGKR 1 2 3 4 5 6 7 8 U5 AGND AGND AVDD THS4521IDGKR 1 2 3 4 5 6 7 8 U11 THS4521IDGKR 1 2 3 4 5 6 7 8 U9 THS4521IDGKR 1 2 3 4 5 6 7 8 U3 CM CHAN N 1 4 CHAN P 1 4 CHAN N 1 4 CHAN P 1 4 CM CM CHAN N 1 4...

Page 25: ...P 7 VCC 8 U14 24AA256 I ST TCA9535RTWR P00 1 P01 2 P02 3 P03 4 P04 5 P05 6 P06 7 P07 8 GND 9 P10 10 P11 11 P12 12 P13 13 P14 14 P15 15 P16 16 P17 17 A0 18 SCL 19 SDA 20 VCC 21 INT 22 A1 23 A2 24 EP 25...

Page 26: ...25 8 2200 pF CAP CERM 2200 pF 50 V 5 C0G NP0 0603 0603 GRM1885C1H222JA01D MuRata C14 C15 C19 C24 C30 C31 C32 C33 C34 C35 C36 C37 C47 C48 C52 C53 16 1500 pF CAP CERM 1500 pF 25 V 5 X7R 0603 0603 C0603C...

Page 27: ...TP6 TP8 2 Test Point Miniature White TH White Miniature Testpoint 5002 Keystone U1 1 3 Vpp V Noise 3 ppm C Drift Precision Series Voltage Reference DGK0008A VSSOP 8 DGK0008A REF5025AIDGKT Texas Instru...

Page 28: ...detailed instructions for installing the ADC1278EVM CVAL GUI which plugs into the ADCPro GUI Before proceeding ensure that ADCPro software GUI has been installed per the instructions in ADCPro Hardwar...

Page 29: ...BAU324 September 2018 Submit Documentation Feedback Copyright 2018 Texas Instruments Incorporated ADS1278EVM CVAL Plug in GUI installation 4 Read the License Agreement and then click I Agree Figure 18...

Page 30: ...U324 September 2018 Submit Documentation Feedback Copyright 2018 Texas Instruments Incorporated ADS1278EVM CVAL Plug in GUI installation 6 Click Install to begin installation of USBStyx Driver Figure...

Page 31: ...www ti com Appendix A 31 SBAU324 September 2018 Submit Documentation Feedback Copyright 2018 Texas Instruments Incorporated ADS1278EVM CVAL Plug in GUI installation 8 Click Finish Figure 22...

Page 32: ...e resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reprod...

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