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C21

0.01uF

C43

0.1uF

C42

2.2uF

C48

0.01uF

C41

0.01uF

C47

2.2uF

C52

2.2uF

C44

0.01uF

C55

2.2uF

C56

0.01uF

+5VCC

+5VCC

+5VCC

+5VCC

C54

2.2uF

C50

0.01uF

+5VCC

C51

2.2uF

C53

0.01uF

+VBD

B_CS

B_RD

B_CONVST

B_BYTE

BUSY

DB0
DB1
DB2
DB3
DB4
DB5

DB6

DB7

DB8

DB9

DB10

DB1

1

DB12

DB13

C46

0.01uF

C40

2.2uF

+5VCC

BUSY

DB[13...0]

B_CS

B_RD

B_BYTE

B_CONVST

-VCC

+VCC

C7

0.1uF

C31

1uF

C37

1uF

C15

0.1uF

R10

604

R13

10

C39

NI

+IN

C35

130pF

C33

1uF

R5

NI

EXT_REF

R4

100

DB[

13...0

]

R11

NI

TP4

3

1

2

SJP2

R6

604

+

C49

10uF

C8

2.2uF

C13

0.01uF

+VBD

C16

1500pF

+5VCC

C17

22uF

R21

75

R14

100

C61

NI

+VCC

C59

1uF

C36

0.1uF

-VCC

C32

0.1uF

C60

1uF

IN

1

OUT

2

GND

3

U3

NI

+5VCC

R3

NI

3

1

2

SJP1

3

1

2

SJP4

R24

0

C63

NI

1

2

3

R25

10k

1

2

SJP5

3

2

6

7

4

5

1

U1

OPA132

R8

49.9

3

1

2

SJP7

3

1

2

SJP6

*

3

2

6

7

4

5

1

8

U2

THS4031

C30

NI

*

TP9

R1

21

R2

NI

REFIN

1

REFOUT

2

NC

3

+VA

4

AGND

5

+IN

6

-IN

7

AGND

8

+VA

9

+VA

10

AGND

11

AGND

12

AG

ND

14

AG

ND

15

DB1

3

16

DB1

2

17

DB1

1

18

DB1

0

19

DB

9

20

DB

8

21

DB

7

22

DB

6

23

+V

BD

24

BDGND

25

DB5

26

DB4

27

DB3

28

DB2

29

DB1

30

DB0

31

N/C

32

N/C

33

+VBD

34

BDGND

35

BUSY

36

AP

W

D

37

pw

r_d

wn/R

ESE

T

38

BY

TE

39

CO

NV

ST

40

RD

41

CS

42

+V

A

43

AG

ND

44

AG

ND

45

+V

A

46

RE

FM

47

RE

FM

48

+V

A

13

U4

ADS7881/ADS7891

B_PWN/RST

B_PWN/RST

B_A_PWD

B_A_PWD

N/C

1

N/C

2

N/C

3

Anode

4

N/C

5

Cathode

6

N/C

7

Cathode

8

U9

REF1004-2.5

R9
49.9k

R12

21

Installed on ADS7881EVM
R13 : 12 Ohm
C16 : 1000pF C0G
U4 : ADS7881

Installed on ADS7891EVM
R13 =10 Ohm
C16 = 1500 pF C0G
U4 : ADS7891

Figure 5-2. Schematic Page 2: ADS7881, ADS7891

www.ti.com

ADS78x1EVM Schematics

SLAU150A – DECEMBER 2004 – REVISED OCTOBER 2021

Submit Document Feedback

ADS7881EVM, ADS7891EVM Evaluation Module

15

Copyright © 2021 Texas Instruments Incorporated

Содержание ADS7881

Страница 1: ...2 1 Decoding Control Signals Using the Address Bus 7 Figure 4 1 Top Layer Layer 1 10 Figure 4 2 Ground Plane Layer 2 11 Figure 4 3 Power Plane Layer 3 12 Figure 4 4 Bottom Layer Layer 4 13 Figure 5 1...

Страница 2: ...SCLS230 SN74AHC1G04 SCLS318 1 1 Features The ADS78x1EVM includes the following features Full featured evaluation board for the high speed SAR type ADS7881 12 bit 4 MSPS or ADS7891 14 bit 3 MSPS single...

Страница 3: ...al but also isolates the amplifier from the capacitive load The capacitor to ground at the input of the ADC works in conjunction with the series resistor to filter the input signal and functions as a...

Страница 4: ...U2 to ground Installed Short to pin 4 of amplifier U2 to VCC Installed 1 1 Factory set condition 1 3 Digital Interface The ADS78x1EVM is designed for easy interfacing to multiple platforms Samtec part...

Страница 5: ...EVM to a host processor Table 1 6 Data Bus Connector P3 Connector Pin 1 Signal Name Description ADS7881 ADS7891 P3 1 B_DB0 Not connected Buffered data bit 0 LSB P3 3 B_DB1 Not connected Buffered data...

Страница 6: ...digital section of the board ADC address decoder buffers There are two ways to provide these voltages 1 Wire in voltages as listed in Table 1 8 at test points on the EVM Table 1 8 Power Supply Test P...

Страница 7: ...be applied via test point TP12 or connector J1 pin 1 As a software test platform connectors P1 P2 and P3 plug into the parallel interface connectors of the 5 6K interface card The 5 6K interface card...

Страница 8: ...ternate C1608C0G1H102J CAP CER 1000 pF 50V C0G 5 0603 17 13 0 01 F C4 C10 C13 C20 C21C26 C41 C44 C46 C48 C50 C53 C56 603 TDK Corporation or Alternate C1608X7R1H103KT CAP CER 10000 pF 50V X7R 10 0603 1...

Страница 9: ...c SSW 105 22 S D VS 0 025 SMT socket bottom side of PWB 43 1 Samtec TSM 105 01 T D V P 0 025 SMT plug top side of PWB 44 1 SMA_PCB_MT J2 SMA_JACK Johnson Components Inc 142 0701 301 Right angle SMA co...

Страница 10: ...te the silkscreens for the ADS78x1EVM Figure 4 1 Top Layer Layer 1 ADS78x1EVM Layout www ti com 10 ADS7881EVM ADS7891EVM Evaluation Module SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document F...

Страница 11: ...2 Ground Plane Layer 2 www ti com ADS78x1EVM Layout SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document Feedback ADS7881EVM ADS7891EVM Evaluation Module 11 Copyright 2021 Texas Instruments Inc...

Страница 12: ...3 Power Plane Layer 3 ADS78x1EVM Layout www ti com 12 ADS7881EVM ADS7891EVM Evaluation Module SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Inco...

Страница 13: ...4 Bottom Layer Layer 4 www ti com ADS78x1EVM Layout SLAU150A DECEMBER 2004 REVISED OCTOBER 2021 Submit Document Feedback ADS7881EVM ADS7891EVM Evaluation Module 13 Copyright 2021 Texas Instruments Inc...

Страница 14: ...B_DB0 B_DB1 B_DB2 B_DB3 B_DB4 B_DB5 B_DB6 B_DB7 B_DB8 B_DB9 B_DB10 B_DB11 B_DB12 B_DB13 AVCC BVDD 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20...

Страница 15: ...1 2 SJP7 3 1 2 SJP6 3 2 6 7 4 5 1 8 U2 THS4031 C30 NI TP9 R1 21 R2 NI REFIN 1 REFOUT 2 NC 3 VA 4 AGND 5 IN 6 IN 7 AGND 8 VA 9 VA 10 AGND 11 AGND 12 AGND 14 AGND 15 DB13 16 DB12 17 DB11 18 DB10 19 DB9...

Страница 16: ...DB7 B_DB4 B_DB6 B_DB5 CS RD CONVST BYTE PWN RST B_BUSY 1 16 2 15 3 14 4 13 5 9 12 6 8 10 11 7 RP2 100 OE DIR A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 VCC GND U5 SN74AHC245PWR VBD C25 0 1uF CS R...

Страница 17: ...91EVM to ADS78x1EVM throughout document 1 Added Related Documentation from Texas Instruments table to Introduction section 2 Changed paragraph preceding Data Bus Connector P3 4 Changed Data Bus Connec...

Страница 18: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Страница 19: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Страница 20: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Страница 21: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Страница 22: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Страница 23: ...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 reproduction and...

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