Texas Instruments ADS1146EVM User Manual Download Page 26

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5411 EAST WILLIAMS BOULEVARD, TUCSON, AZ 85711 USA

TITLE

SHEET

FILE

SIZE

DATE

REV

DRAWN BY

ENGINEER

REVISION HISTORY

REV

ENGINEERING CHANGE NUMBER

APPROVED

PRECISION ANALOG PRODUCTS

HIGH-PERFORMANCE ANALOG DIVISION

SEMICONDUCTOR GROUP

DOCUMENT CONTROL NO.

+5V

-5V

+5V

C14

150nF

C15

0.1uF

C1
1uF

10K

J1
JPR-1X3

C5
22uF

GND

TP3
GND

CNTL

CLKX

CLKR

FSX

FSR

INT

TOUT

GPIO5

GPIO0

DGND

GPIO1

GPIO2

DGND

GPIO3

GPIO4

SCL

DGND

SDA

SERIALHDR

OBCLK

EOH

GND

OUT

VCC

CRY_C3391-4.096

DVDD

C20

10nF C0G

GND

A/B

VCC

SN74LVC2G157DCT

470K

R11
47K

R12
470K

GPI

J7A (TOP) = SAM_TSM-110-01-L-DV-P

J7B (BOTTOM) = SAM_SSW-110-22-F-D-VS

DVDD

P00

P01

P02

P03

P04

P05

P06

P07

GND

P10

P11

P12

P13

P14

P15

P16

P17

SCL

SDA

VCC

INT

PCA9535RGE

C12

0.1uF

DVDD

FRC_BAT54

ONS_MMBZ5231BLT1

VIN

VOUT

TRIM

GND

TEMP

REF5020ID

AVDD

A0(+)

A1(+)

A2(+)

A3(+)

REF-

REF+

A0(-)

A1(-)

A2(-)

A3(-)

AGND

VCOM

AGND

DAUGHTER-ANALOG

J8A (TOP) = SAM_TSM-110-01-L-DV-P

J8B (BOTTOM) = SAM_SSW-110-22-F-D-VS-K

GND

OUT

BYP

TPS79225DBV

FRC_FDN302P

SN74LVC1G07DBV

100K

+5V

FRC_FDN337N

+5V

SN74AHCT1G04DBV

+5V

+3.3V

-VA

-5VA

AGND

VD1

+5VD

+VA

+5VA

DGND

+1.8VD

+3.3VD

DAUGHTER-POWER

ADC AVDD
ADC AVSS
DIGITAL=3.3V
DGND
AGND

DVDD

JUMPER FUNCTIONS

ONS_MMBZ5231BLT1

J3A (TOP) = SAM_TSM-105-01-L-DV-P

J3B (BOTTOM) = SAM_SSW-105-22-F-D-VS-K

GND

OUT

BYP

TPS72325DBV

FRC_FDN302P

R13
100K

C16
10uF

AVDD

DVDD

C17

1uF

-5VA

5.1V

-2.5V

+2.5V

C22
10uF

R10

JPR-1X3

OPA227

Ref-
Ref+

DVDD

22uF

C11

0.1uF

C18

10uF

C19

10uF

C13

0.1uF

RICK DOWNS

BOB BENJAMIN

6508032

30-MAR-2009

1uF

J10

JPR-2X5

1uF

DVDD

C21

10uF

R15
0

R14
0

Ref+

C24

47pF

C25

47pF

C7
0.1uF

TP1
AVSS

TP4
AVDD

TP2
REFP

AVDD

RA1A

100K

-5V

C10

0.1uF

FRC_BAT54

GND

SDA

SCL

VCC

U11

MCP_24AA256-I/ST

0.1uF

DVDD

RA2

100K

2.7K

DVDD

0.1uF

DVDD

VDD

RESET

GND

U12

TPS3836DBV

EXT CLK INPUT

DVDD

DGND

RESET

REFP

REFN

AINP

AINN

AVSS

AVDD

START

DRDY

DOUT/DRDY

DIN

SCLK

U10

ADS1246IPW

TERMBLOCK-3

ADS1146EVM

C23

10uF

NKK_SS14MDP2

2
4
6

1
3
5

HEADER-3X2_SPECIAL

ADS1146IPW

ADS1246EVM

Summary of Contents for ADS1146EVM

Page 1: ...1246 The EVM allows evaluation of all aspects of the ADS1146 or ADS1246 devices Complete circuit descriptions schematic diagrams and a bill of materials are included in this document The following related documents are available through the Texas Instruments web site at http www ti com EVM Compatible Device Data Sheets Device Literature Number ADS1146 SBAS453 ADS1246 SBAS426A REF5020 SBOS410C OPA2...

Page 2: ... Window 13 10 ADS1246EVM PDK Plug In Display Window 14 11 Connection Timeout 15 12 Firmware Download Message Box 15 13 Firmware Download Progress Indicator 16 14 Firmware Download Complete Message Box 16 15 I O Config Tab 18 16 Enabling VBIAS on a Channel 19 17 Cal Tab 21 18 About Tab 22 19 Progress Bar While Collecting Data 23 List of Tables 1 J8 J4 Analog Interface Pinout 4 2 J7 Serial Interface...

Page 3: ...Pro For more information about ADCPro see the ADCPro Analog to Digital Converter Evalutation Software User s Guide literature number SBAU128 available for download from the TI web site This manual covers the operation of both the ADS1146 ADS1246EVM and the ADS1146EVM PDK ADS1246EVM PDK Throughout this document the abbreviation EVM and the term evaluation module are synonymous with the ADS1146 ADS1...

Page 4: ...ons except J8 15 3 Digital Interface 3 1 Serial Data Interface The ADS1246EVM is designed to easily interface with multiple control platforms Samtec part numbers SSW 110 22 F D VS K and TSM 110 01 T DV P provide a convenient 10 pin dual row header socket combination at J7 This header socket provides access to the digital control and serial data pins of the ADC Consult Samtec at http www samtec com...

Page 5: ...ls on these pins 4 Power Supplies J3 is the power supply input connector Table 3 lists the configuration details for J3 Table 3 J3 Configuration Power Supply Input Pin No Pin Name Function Required J3 1 VA Unused No J3 2 VA Unused No J3 3 5VA 5V analog supply Always J3 4 5VA 5V analog supply Only in bipolar mode J3 5 DGND Digital ground input Yes J3 6 AGND Analog ground input Yes J3 7 1 8VD 1 8V d...

Page 6: ...r the device from U1 filtered and buffered through U2 This 2 048V may be used to drive the REFP input or REFP can be connected to the external reference on J8 through switch S1 REFP should not be connected to AVDD through switch S1 because this connection will violate the specification for the maximum reference input Figure 1 shows switch S1 as it appears on the EVM The low side of the reference R...

Page 7: ...e the following recommendations J6 should be removed if the external clock source is used and the TOUT pin is still driven by a processor in order to avoid conflicts Jumper J2 can be used to always select the U8 oscillator DVDD position or allow the onboard external clock selection to be controlled by GPIO5 J7 19 as shown in Figure 2 Figure 2 Jumper J2 7 EVM Operation This section provides informa...

Page 8: ...e ADS1246EVM PDK including setup program installation and program usage To prepare to evaluate the ADS1246 with the ADS1246EVM PDK complete the following steps Step 1 Install the ADCPro software if not already installed on a PC Step 2 Install the ADS1246EVM PDK EVM plug in software Step 3 Complete the USB driver installation process Step 4 Set up the ADS1246EVM PDK Step 5 Connect the ADS1246EVM PD...

Page 9: ...version on your CD Double click the file to run it then follow the instructions shown You can also utilize the ADCPro Update Check feature to check for newer versions of the ADS1246EVM PDK plug in once you have installed a version of it Follow the on screen prompts Once the ADCPro plug in installs you will be prompted to install the Virtual COM port driver as shown in Figure 4 Figure 4 Virtual COM...

Page 10: ...p the ADS1246EVM PDK Step 1 Unpack the ADS1246EVM PDK kit Step 2 Set the switches on the MMB3 as described below as shown in Figure 6 Set switch SW4 to the right Set the DAC switch SW5 to the OUT position to the right Figure 6 MMB3 Switch Locations 10 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK SBAU149B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Inst...

Page 11: ...EVM into the MMB3 Check the pin alignment carefully before applying power to the PDK Step 4 Set the jumpers and switches on the ADS1246EVM as shown in Figure 3 note that these settings are the factory configured settings for the EVM 11 SBAU149B June 2009 Revised May 2011 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorpor...

Page 12: ...bit digital to analog converter DAC that can be used as a signal source for an ADC under test and has a joystick for control of functions on the board when it is not controlled by a PC These features are experimental and not supported in the ADS1246EVM PDK at this time The MMB3 derives power from the USB interface and generates 5VD 3 3V and 1 8V as well as 5VA 5VA and 10V The 10V is supplied to th...

Page 13: ...246EVM PDK plug in is included in the ADS1246EVM PDK package The program currently runs only on Microsoft Windows platforms of Windows XP Windows Vista is NOT supported If this is the first time installing ADCPro and plug ins follow these procedures to run ADCPro and perform any necessary firmware installations Make sure the ADCPro software and device plug in software are installed from the CD ROM...

Page 14: ...play Window Step 3 The ADS1246EVM PDK plug in window has a status area at the top of the screen When the plug in is first loaded the plug in searches for the board You will see a series of messages in the status area indicating this action 14 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK SBAU149B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments I...

Page 15: ...used Figure 11 Connection Timeout Step 5 The plug in detects whether or not the board has the correct firmware loaded The first time you use the ADS1246EVM PDK the firmware for the MMB3 may need to be downloaded to the MMB3 If the firmware must be loaded you will see a screen similar to that shown in Figure 12 Figure 12 Firmware Download Message Box 15 SBAU149B June 2009 Revised May 2011 ADS1146EV...

Page 16: ...The firmware is saved in flash memory on the MMB3 so this operation should only need to be performed once Figure 13 Firmware Download Progress Indicator When the firmware download completes the message box shown in Figure 14 appears Follow the on screen instructions and the plug in should now connect to the EVM Figure 14 Firmware Download Complete Message Box 16 ADS1146EVM ADS1246EVM ADS1146EVM PD...

Page 17: ...the ADS1246 It consists of a tabbed interface see Figure 15 with different functions available on different tabs These controls are described in this section You can adjust the ADS1246EVM settings when you are not acquiring data During acquisition all controls are disabled and settings may not be changed When you change a setting on the ADS1246EVM plug in the setting immediately updates on the boa...

Page 18: ...unction of the multiplexer and power and reference settings in the ADS1246 The tab is divided into two sections I O Configuration and Supply Configuration Figure 15 I O Config Tab 18 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK SBAU149B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Page 19: ... of the supply You can test this option as shown in Figure 16 using one input tied to something close to ground make sure you observe the common mode restrictions listed in the ADS1246 device data sheet as a reference for this signal Figure 16 Enabling VBIAS on a Channel 19 SBAU149B June 2009 Revised May 2011 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK Submit Documentation Feedback Copyrig...

Page 20: ...work properly drop down to the lower data rate and allow sufficient time to collect the data The BCS control sets the current level of the burnout current sources it may be set Off or to 0 5μA 2μA or 10μA The Power Down control powers down the ADS1246 Note that no data can be collected if the Power Down button is activated 9 1 1 2 Supply Configuration This section controls the selection of the pow...

Page 21: ...m a self calibration the offset and full scale register values are then updated on the plug in screen You may also write to these registers by typing in hex values in the New fields then press the Set button You may read the values at any time by pressing the Read button 21 SBAU149B June 2009 Revised May 2011 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK Submit Documentation Feedback Copyrig...

Page 22: ...cators show the version numbers of the plug in and firmware code respectively The ID indicator shows the value of the ID 3 0 bits in the ADS1246 ID register The Notes indicator may show relevant notes about the plug in or firmware code if there are any 22 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK SBAU149B June 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas ...

Page 23: ...DS1246EVM PDK plug in disables all the front panel controls while acquiring and displays a progress bar as shown in Figure 19 Figure 19 Progress Bar While Collecting Data For more information on testing analog to digital converters in general and using ADCPro and Test plug ins refer to the ADCPro User Guide 23 SBAU149B June 2009 Revised May 2011 ADS1146EVM ADS1246EVM ADS1146EVM PDK ADS1246EVM PDK ...

Page 24: ...0 1μF TDK C1608X7R1E104KT 10 25WV Size 0603 5 1 0 15μF C14 Capacitor X7R Ceramic 0 15μF Murata GRM188R71C154KA01 10 16WV Size 0603 D 6 6 10μF C16 C18 C19 Capacitor X5R Ceramic 10μF TDK C2012X5R0J106MT C21 C23 20 6 3WV Size 0805 7 2 47pF C24 C25 Capacitor C0G Ceramic 47pF TDK C1608C0G1H470JT 5 50WV Size 0603 8 1 10nF C20 Capacitor C0G Ceramic 10nF TDK C1608C0G1E103JT 5 25WV Size 0603 9 3 D1 D2 D5 D...

Page 25: ...1 Through Hole Electronics 35 1 U1 Precision Voltage Reference Texas Instruments REF5020ID 2 048V 36 1 U2 Precision Operational Amplifier Texas Instruments OPA227U 37 1 U3 Texas Instruments PCA9535RGE 16 Bit I2 C I O Expander 38 1 U4 Inverter Single Gate Texas Instruments SN74AHCT1G04DBVR 39 1 U5 Buffer Open Drain Single Gate Texas Instruments SN74LVC1G07DBVRG4 40 1 U6 LDO Voltage Regulator 2 5V T...

Page 26: ...UGHTER ANALOG J8A TOP SAM_TSM 110 01 L DV P J8B BOTTOM SAM_SSW 110 22 F D VS K IN 1 GND 2 EN 3 OUT 5 BYP 4 U6 TPS79225DBV Q1 FRC_FDN302P 2 4 5 3 U5 SN74LVC1G07DBV R8 100K 5V 5V Q3 FRC_FDN337N 5V 2 4 5 3 U4 SN74AHCT1G04DBV 5V 3 3V VA 2 5VA 4 AGND 6 VD1 8 5VD 10 VA 1 5VA 3 DGND 5 1 8VD 7 3 3VD 9 J3 DAUGHTER POWER ADC AVDD ADC AVSS DIGITAL 3 3V DGND AGND DVDD JUMPER FUNCTIONS D4 ONS_MMBZ5231BLT1 J3A ...

Page 27: ... product This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI produc...

Page 28: ...horized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge ...

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