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Texas Instruments ADS7881 User Manual Download Page 16

L4

MMZ2012R601A

L2

MMZ2012R601A

L1

MMZ2012R601A

+

C24
10uF

+

C29

10uF

+

C27
10uF

C28

1uF

C2

1uF

C4
0.01uF

C26
0.01uF

L3

MMZ2012R601A

+

C14

10uF

TP6

+5VCC

C10

0.01uF

C9

0.1uF

TP5

TP8

+VBD

C20

0.01uF

C22

0.1uF

TP7

TP3

TP1

TP2

+VCC

-VCC

C12

10uF

C19
10uF

C6
10uF

C1
10uF

C5
1000pF

C3
1000pF

C23

1000pF

C11

1000pF

B_DB[13...0]

1

16

2

15

3

14

4

13

5

9

12

6

8

10

11

7

RP1

1K

/OE

DIR

A1
A2
A3
A4
A5
A6
A7
A8

B1
B2
B3
B4
B5
B6
B7
B8

VCC

GND

U6

SN74AHC245PWR

C57

0.1uF

B_RD

1

16

2

15

3

14

4

13

5

9

12

6

8

10

11

7

RP3

1K

+VBD

/OE

DIR

A1
A2
A3
A4
A5
A6
A7
A8

B1
B2
B3
B4
B5
B6
B7
B8

VCC

GND

U7

SN74AHC245PWR

C58
0.1uF

B_RD

DB[17...0]

DB13

DB12

DB11

DB10

DB9

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

B_DB13

B_DB12

B_DB11

B_DB0

B_DB10

B_DB1

B_DB9

B_DB2

B_DB8

B_DB3

B_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

RD

CONVST

BYTE

PWN/RST

R20
10k

R19
10k

R18
10k

+VBD

R17

10k

R16
10k

BUSY

B_CS
B_RD
B_CONVST
B_BYTE
B_PWN/RST

+AVCC

+VA

-VA

DB[17...0]

B_DB[13...0]

+BVDD

B_CS

B_BYTE

B_CONVST

B_RD

B_PWN/RST

A

1

B

2

C

3

G1

6

G2A

4

G2B

5

Y0

15

Y1

14

Y2

13

Y3

12

Y4

11

Y5

10

Y6

9

Y7

7

V

C

C

16

GN

D

8

U8

SN74AHC138PWR

A0
A1
A2

A0

A2

A1

+VBD

C62

0.1uF

+VBD

1

3

2

W1

1

3

2

W2

TP13

W3

+VBD

DC_CS

RESET#

S1

DC_CS

2

4

5

3

U12

SN74AHC1G04DBV

+VBD

C38

0.1uF

INTc

W4

A_PWD

R7
10k

A_PWD

B_A_PWD

B_A_PWD

R15

100

C18

0.1uF

R22
10k

+VBD

TP15

Figure 5-3. Schematic Page 3: Digital Communication

ADS78x1EVM Schematics

www.ti.com

16

ADS7881EVM, ADS7891EVM Evaluation Module

SLAU150A – DECEMBER 2004 – REVISED OCTOBER 2021

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Copyright © 2021 Texas Instruments Incorporated

Summary of Contents for ADS7881

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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