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Texas Instruments ADS8381EVM User Manual Download Page 30

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ti

12500 TI Boulevard.  Dallas, Texas 75243

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Revision History

REV

ECN Number

Approved

DOCUMENT CONTROL #:

3

3

Power & Digital Buffer

A

DATE:

6-May-2004 

Power Supply & Digital Buffer Circuits

6448017

L4

BLM21AJ601SN1L

L2

BLM21AJ601SN1L

L1

BLM21AJ601SN1L

C28

1uF

C2

1uF

C4

0.01uF

C26

0.01uF

L3

BLM21AJ601SN1L

TP6

+5VCC

C10

0.01uF

C9

0.1uF

TP5

TP8

C20

0.01uF

C22

0.1uF

TP7

TP3

TP1

TP2

+VCC

-VCC

C12

10uF

C19

10uF

C6

10uF

C1

10uF

C5

1000nF

C3

1000nF

C23

1000nF

C11

1000nF

B_DB[17...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

+VBD

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

/OE

DIR

A1

A2

A3

A4

A5

A6

A7
A8

B1

B2

B3

B4

B5

B6

B7
B8

VCC

GND

U8

SN74AHC245PWR

C59

0.1uF

B_RD

DB[17...0]

DB17

DB16

DB15

DB14

DB13

DB12

DB11

DB10

DB9

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

B_DB17

B_DB16

B_DB15

B_DB14

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

ADC_CS

ADC_RD

ADC_CONVST

BYTE

BUS18/16

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

ADC_CS
ADC_RD
ADC_CONVST
BYTE
BUS18/16

R20

10k

R19

10k

R18

10k

+VBD

R17

10k

R16

10k

BUSY

B_CS

B_RD

B_CONVST

B_BYTE

B_BUS18/16

+5VA

+VA

-VA

DB[17...0]

B_DB[17...0]

+BVDD

RP4

1K

B_CS

B_BYTE

B_CONVST

B_RD

B_BUS18/16

+

C27

10uF

+

C24

10uF

+

C14

10uF

+

C29

10uF

Lijoy Philipose
Lijoy Philipose

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

VC

C

16

GND

8

U11

SN74AHC138PWR

A0

A1

A2

A0

A2

A1

+VBD

C34

0.1uF

+VBD

+VBD

+VBD

+VBD

B_RD

+VBD

+VBD

 

1

 

3

 

2

W1

 

1

 

3

 

2

W2

+VA

-VA

+5VA

+BVDD

DC_CS

DC_CS

TP17

R7

10k

+VBD

2

4

5

3

U12

SN74AHC1G04DBV

+VBD

C38

0.1uF

INTc

W3

B_BUSY

Summary of Contents for ADS8381EVM

Page 1: ...ADS8381EVM May 2004 Data Acquistion User s Guide SLAU133...

Page 2: ...itute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual p...

Page 3: ...handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s r...

Page 4: ...there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 60 C The EVM is desi...

Page 5: ...Chapter 3 Digital Interface Chapter 4 Power Supply Requirements Chapter 5 Using the EVM Chapter 6 ADS8381EVM BOM Layout and Schematic Related Documentation From Texas Instruments To obtain a copy of a...

Page 6: ...t J of part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other en vironments may cause interference with radi...

Page 7: ...erence 2 3 3 Digital Interface 3 1 4 Power Supply Requirements 4 1 5 Using the EVM 5 1 5 1 As a Reference Board 5 2 5 2 As a Prototype Board 5 2 5 3 As a Software Test Platform 5 2 6 ADS8381EVM BOM La...

Page 8: ...er Layer 4 6 6 Tables 2 1 Analog Input Connector 2 1 2 2 Solder Short Jumper Setting 2 3 3 1 Pinout for Parallel Control Connector P2 3 1 3 2 Jumper Settings 3 2 3 3 Data Bus Connector P3 3 2 3 4 Pino...

Page 9: ...1 1 EVM Overview EVM Overview This chapter contains the features of the ADS8381EVM Topic Page 1 1 Features 1 1 Chapter 1...

Page 10: ...aluation board for the high speed ADS8381 18 bit single channel parallel interface SAR type analog to digital converters Onboard signal conditioning Onboard reference Input and output digital buffer O...

Page 11: ...the center pin of SMA connector J2 Table 2 1 Analog Input Connector Description Signal Name Connector Pin Signal Name Description Pin tied to Ground AGND P1 1 P1 2 Noninverting Input Channel Reserved...

Page 12: ...elected such that ADS8381EVM meets the 100 kHz AC performance specifications listed in the data sheet The series resistor works with the capacitor to filter the input signal but also isolates the ampl...

Page 13: ...via P1 pin 20 See Table 2 2 for jumper settings See Chapter 6 for the full schematic Table 2 2 Solder Short Jumper Setting Reference Jumper Setting Reference Designator Description 1 2 2 3 SJP1 Select...

Page 14: ...2 4...

Page 15: ...A1 Address line from processor P2 11 A2 Address line from processor P2 13 P2 15 P2 17 P2 19 INTc Set jumper W3 to select BUSY or inverted signal to be applied to this pin Note All even numbered pins o...

Page 16: ...ered Data Bit 6 P3 15 D7 Buffered Data Bit 7 P3 17 D8 Buffered Data Bit 8 P3 19 D9 Buffered Data Bit 9 P3 21 D10 Buffered Data Bit 10 P3 23 D11 Buffered Data Bit 11 P3 25 D12 Buffered Data Bit 12 P3 2...

Page 17: ...l Description TP16 BVDD Apply 3 3 V or 5 0 V See ADC data sheet for full range TP20 AVCC Apply 5 0 V TP14 VA Apply 6 0 V Positive supply for amplifier TP18 VA Apply 6 0 V Negative supply for amplifier...

Page 18: ...4 2...

Page 19: ...The ADS8381EVM serves three functions 1 As a reference design 2 As a prototype board and 3 As software test platform Topic Page 5 1 As a Reference Board 5 2 5 2 As a Prototype Board 5 2 5 3 As a Softw...

Page 20: ...shorts the minus supply pin of the amplifier to ground Positive supply voltage can be applied via test point TP14 or connector J1 pin 1 5 3 As a Software Test Platform As a software test platform con...

Page 21: ...ic ADS8381EVM BOM Layout and Schematic This chapter contains the ADS8381EVM bill of materials the layouts and the schematic Topic Page 6 1 ADS8381EVM Bill of Materials 6 2 6 2 ADS8381EVM Layout 6 5 6...

Page 22: ...805 Not installed Not installed R2 1 NI 805 Not installed Not installed R6 R10 2 1k 805 Panasonic ECG or Alternate ERJ 6ENF1001V 1 00 k 1 10W 1 0805 SMD R16 R17 R18 R19 R20 5 10k 603 Panasonic ECG or...

Page 23: ...V 10 SMT C17 1 47 F 1206 TDK Corporation or Alternate C3216X5R0J476M Capacitor CER 47 F 6 3 V X5R 20 1206 C13 C18 C45 C60 C61 5 NI 603 Not installed Not installed C30 C35 R5 3 NI 805 Not installed No...

Page 24: ...01 Right Angle SMA Connector J4 1 6X2X 1 6X2X 1_SMT _plug_ _soc Samtec SSW 106 22 S D VS 0 025 SMT Socket bottom side of PWB ket Samtec TSM 106 01 T D V P 0 025 SMT PLUG top side of PWB P3 1 18X2X 1_...

Page 25: ...ADS8381EVM Layout 6 5 ADS8381EVM BOM Layout and Schematic 6 2 ADS8381EVM Layout Figure 6 1 Top Layer Layer 1 Figure 6 2 Ground Plane Layer 2...

Page 26: ...ADS8381EVM Layout 6 6 Figure 6 3 Power Plane Layer 3 Figure 6 4 Bottom Layer Layer 4...

Page 27: ...ADS8381EVM Schematic 6 7 ADS8381EVM BOM Layout and Schematic 6 3 ADS8381EVM Schematic The schematic follows this page...

Page 28: ...13 14 15 16 17 18 19 20 P1 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 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 3...

Page 29: ...8 Footprint 5VCC C18 NI C45 NI C17 47uF EXT_REF R14 100 VCC C16 1uF C36 0 1uF VCC IN 1 OUT 2 GND 3 U3 REF3040 5VCC DB 17 0 TP4 3 1 2 SJP1 3 1 2 SJP2 1 2 SJP3 R15 100 C49 10uF IN 1 OUT 2 GND 3 U10 NI C...

Page 30: ...DIR A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 VCC GND U8 SN74AHC245PWR C59 0 1uF B_RD DB 17 0 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 B_DB17 B_DB16 B_DB1...

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