Texas Instruments ADS1x7xEVM-PDK Скачать руководство пользователя страница 21

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07APR11

Texas Instruments

G Hupp

ads1278evm.sch

G Hupp

Rev

Engineer

Drawn by

Filename

Number

Size

Title

Sheet

Date

ADS1278EVM

2/9/2012

PWRDN BUFFERS

C50

0.1u

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

C25

2.2n

C23

2.2n

VIN+

2
VOCM

VIN-

VS-

VS+

VOUT+

VOUT-

U11

R49

49.9

R50 49.9

R47

C52

1.5n

R45

R46

C53

1.5n

R48

VIN+

2
VOCM

VIN-

VS-

VS+

VOUT+

VOUT-

R23

49.9

R28 49.9

R22

C19

1.5n

R24

R26

C24

1.5n

R27

C21

0.1u

C17

0.1u

C18

2.2n

C16

2.2n

VIN+

2
VOCM

VIN-

VS-

VS+

VOUT+

VOUT-

R37

49.9

R36 49.9

R39

C48

1.5n

R43

R42

C47

1.5n

R38

VIN+

2
VOCM

VIN-

VS-

VS+

VOUT+

VOUT-

R14

49.9

R15 49.9

R17

C14

1.5n

R20

R21

C15

1.5n

R18

C49

0.1u

R29

100k

JP3

C55

0.1u

C13

0.1u

C39

0.1u

C22

0.1u

TP10

TP9

ANP1

ANP2

ANN1

ANN2

CHAN-P2

CHAN-P1

ANN2

REFN_HDR[1]

REFP_HDR[1]

ANN1

ANALOG_IN [1,3]

CHAN-N1

CHAN-N2

CHAN-N3

ANN3

ANP3

BRD_ANLG_IN

ANP1

ANP2

CHAN-P3

CHAN-P4

CHAN-N4

AVDD

ANP4

ANN4

ANN3
ANP3

ANP4

ANN4

AGND

AVDD

AGND

BUF_PDN

[2]

BUF_PDN

[2]

BUF_PDN

[2]

BUF_PDN

[2]

ANN4

ANP4

AVDD

AGND

AVDD

AGND

AVDD

AGND

AVDD

Содержание ADS1x7xEVM-PDK

Страница 1: ...6 bit version of the ADS1278 and the ADS1274 and ADS1174 which are 4 channel versions of the ADS1278 and ADS1178 respectively The EVM PDK allows evaluation of all aspects of the ADS1x7x devices This document includes an EVM QuickStart hardware and software details bill of materials and schematic The following related documents are available through the Texas Instruments web site at http www ti com...

Страница 2: ...efault Jumper Locations 4 2 Channel Enable 8 3 Clock Settings and Mode 9 List of Tables 1 EVM Compatible Device Data Sheets 1 2 Default Jumper Switch Configuration 4 3 Critical Connections 6 4 Operating Modes Clock Frequency 10 5 Jumper and Switch Descriptions 11 6 J3 Primary Analog Interface Pinout 13 7 J1 Secondary Analog Interface Pinout 13 8 J4 Serial Interface Header 14 9 J2 DOUTx Header 15 1...

Страница 3: ...DS1274 Voltage reference options external or onboard Clock options External clock source PLL or DSP supplied or 27MHz onboard crystal oscillator GPIO access Compatible with the TI Modular EVM System ADS1x7xEVM PDK includes the ADS1x7xEVM board with the DSP based MMB0 motherboard that can be used with ADCPro to quickly evaluate the device This manual covers the operation of the ADS1x7xEVM PDK Throu...

Страница 4: ...e jumpers and switches and the factory default conditions Table 2 Default Jumper Switch Configuration Switch Default Position Switch Description S1 All OFF Down Power down channel DIP switches Hardware control S2 All OFF Down Mode Format and CLKDIV DIP switches Hardware control S3 INT Right On board voltage reference selected S4 Header connected to converter Left Channel 4 header connected to conv...

Страница 5: ...figured settings for the EVM 2 Using ADCPro HW SW Installation Manual verify the MMB0 jumpers are in the default position and install ADCPro and ADS1278EVM plug in software Complete hardware connection and driver installation as part of ADCPro HW SW Installation Manual using the below settings MMB0 J13A Open MMB0 J13B Short No additional power connections are required 3 Plug the ADS1278EVM onto th...

Страница 6: ...he EVM 3 1 Analog Inputs The analog inputs for the ADS1278EVM are connected to J1 and J3 Channels 1 4 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 ADS1278 Channels 5 8 connect to J1 and have an RC filter available to filter the input before con...

Страница 7: ...When a setting is changed on the ADS1178EVM ADS1278EVM plug in the setting immediately updates on the board Settings on the ADS1178EVM ADS1278EVM correspond to settings described in the ADS1278 product data sheet product data sheet 4 1 Top Level Controls You can adjust the ADS1278EVM settings when you are not acquiring data During acquisition all controls are disabled and settings may not be chang...

Страница 8: ...re 2 Channel 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 Channels Disabled turn all the selector switches either ON or OFF 4 3 Settings Tab The Settings tab allows for the selection of the various clock frequencies operating mode data format and o...

Страница 9: ... the 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 allows selection of the converter operating mode High Speed High Resolution Low Power or Low Speed The CLKDIV control can be set to 0 or 1 The Data Output Format allows selection of the data output for...

Страница 10: ...VM PDK Table 4 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 About tab provides information on the EVM hardware and software versions Plug in Version is software version of ADCPro plug in Firmware Version is firmware version loaded and running on the proce...

Страница 11: ...ware control for PWDN2 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 for use with software Power down Channel 5 2 Hardware control for PWDN5 set to OFF position for use with software Power down Channel 6 2 Hardware control for PWDN6 set to OFF po...

Страница 12: ... incorrect settings The software cannot detect if the switches are changed after startup CAUTION When using the ADS1x7xEVM PDK the DIP switches S1 and S2 must all be switched down toward the center of the board Failure to do so may damage the EVM 5 3 Clock Source The ADS1278 clock can come from one of several sources the onboard 27MHz crystal oscillator a clock supplied by a processor on the TOUT ...

Страница 13: ...nd AGND J3 19 J3 20 EXTREFP External Reference positive input 1 Pin 1 is top right hand corner located next to reference designator Table 7 J1 Secondary Analog Interface Pinout Description Signal Pin Number 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 AINN8 J1 3 J1 4 AINP8 Analog Input Channel 8 Positiv...

Страница 14: ... in the FS positions which is the factory default setting See Figure 1 Switching to SPI format will allow users to connect the EVM to any SPI compatible processor not supporting the frame sync mode If this format is selected keep in mind that the high speed mode will not operate at full speed 32 768MHz because of the limitations outlined in the device product data sheet 5 5 2 Serial Data Interface...

Страница 15: ...to reference designator Table 9 J2 DOUTx Header Data Out Line Pin Number Data Out Line DOUT1 1 1 2 DOUT2 DOUT3 3 4 DOUT4 DOUT5 5 6 DOUT6 DOUT7 7 8 DOUT8 5 6 Power Supply Header J5 J5 is the power supply input connector Table 10 lists the configuration details for J5 Supplies of 1 8V 3 3V and 5 0V are required for operation of the EVM When using the EVM as part of the EVM PDK these voltages are gen...

Страница 16: ...V TDK C1608X5R1A106M 6 4 1 2 2n C8 10 C12 Capacitor Ceramic C0G 50V TDK C1608COG1H222 J 4 2 2n C16 C18 C23 C25 7 8 1 5n C14 15 C19 C24 C47 48 C52 53 Capacitor Ceramic X7R 25V TDK C1608X7R1E152M 8 1 1 5n C30 37 8 3 0 CM1 3 Resistor Chip 1 4W Vishay Dale CRCW06030000Z0EAHP 9 1 1 J1 Top Header SMT Vert 5x2 pin 100mil spacing Samtec TSM 105 01 T DV P 10 1 J5 Top Header SMT Vert 5x2 pin 100mil spacing ...

Страница 17: ...ole Color Keyed Keystone 5000 34 1 U1 IC Precision Voltage Reference 2 5V TI REF5025AID 35 1 U2 IC Op Amp High Speed Single Supply R R TI OPA2350DGK 36 4 U3 U5 U9 U11 IC Negative R R Input R R Output Fully Differntial Amplifier TI THS4521DGK 37 1 2 U4 IC Quad Octal Simultaneous Sampling 24 Bit A D Converter TI ADS1278PAP 38 1 U6 Single 2 line To 1Line Data Selector Multiplexer TI SN74LVC2G157DCT 3...

Страница 18: ...cumentation Feedback Copyright 2012 2016 Texas Instruments Incorporated Revision History Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Changes from Original February 2012 to A Revision Page Changed step 4 of Section 2 2 5 ...

Страница 19: ...32 FORMAT0 33 MODE1 34 MODE0 35 PWDN8 36 PWDN7 37 PWDN6 38 PWDN5 39 PWDN4 40 PWDN3 41 PWDN2 42 PWDN1 43 AGND 44 AVDD 45 AINP8 46 AINN8 47 AINP7 48 AINN7 49 AINP6 50 AINN6 51 AINP5 52 AINN5 53 AVDD 54 AGND 55 VCOM 56 VREFP 57 VREFN 58 AGND 59 AGND 60 AVDD 61 AINP4 62 AINN4 63 AINP3 64 AINN3 65 PWPD U4 REFP_HDR REFN_HDR REFP REFN AGND AVDD REF_CKT 7 8 9 10 11 12 4 5 6 1 2 3 S6 SW_SSB42 6 5 7 OUTB U2...

Страница 20: ...e Drawn by 3 Engineer Rev 1 E G Hupp Number ads1278evm sch G Hupp 4 Texas Instruments 07APR11 R1 2k R3 47 C2 150n C3 0 1u S3 C7 10u R2 1k C1 100u 1 DNC 2 VIN 3 TEMP 4 GND 5 TRIM 6 VOUT 7 NC 8 DNC U1 C5 10u C4 1u 2 3 1 OUTA 4 V 8 V U2 A C6 1u AVDD 1 2 AGND 1 2 3 REFN 1 REFP 1 REFP_HDR 1 2 REFN_HDR 1 2 ...

Страница 21: ...n R27 1k C21 0 1u C17 0 1u S4 S5 C18 2 2n C16 2 2n 8 VIN 2 VOCM 1 VIN 6 VS 3 VS 4 VOUT 5 VOUT 7 PD U9 R37 49 9 R36 49 9 R39 1k C48 1 5n R43 1k R42 1k C47 1 5n R38 1k 8 VIN 2 VOCM 1 VIN 6 VS 3 VS 4 VOUT 5 VOUT 7 PD U3 R14 49 9 R15 49 9 R17 1k C14 1 5n R20 1k R21 1k C15 1 5n R18 1k C49 0 1u R29 100k 1 2 JP3 C55 0 1u C13 0 1u C39 0 1u C22 0 1u TP10 TP9 ANP1 ANP2 ANN1 ANN2 CHAN P2 CHAN P1 ANN2 REFN_HD...

Страница 22: ...2 A 100k 2 1 15 2 3 1 14 2 4 1 13 2 5 1 12 2 6 1 11 2 7 1 10 2 8 1 9 2 1 1 16 2 R33 A 100k 2 1 15 2 3 1 14 2 4 1 13 2 5 1 12 2 C58 0 1u 1 7 5 4 2 8 3 6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 S1 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 S2 6 1 11 2 1 2 3 4 5 6 7 8 9 10 J1 C9 2 2n R5 0 C31 1 5n R4 0 C30 1 5n R7 0 R6 0 R9 0 R8 0 R11 0 R10 0 C33 1 5n C32 1 5n C35 1 5n C34 1 5n C37 1 5n C36 1 5n C8 2 2n C...

Страница 23: ...y set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warr...

Страница 24: ...the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la réglementation d Industrie Canada le présent émetteur radio peut fo...

Страница 25: ...ed loads Any loads applied outside of the specified output range may also result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Please consult the EVM user guide prior to connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even ...

Страница 26: ...COST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN TWELVE 12 MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS OCCURRED 8 2 Specif...

Страница 27: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

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