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8

EVM Operation

8.1

Analog Input

www.ti.com

EVM Operation

Figure 6. Jumper J19

The following section provides information on the analog input, digital control, and general operating
conditions of the ADS1274EVM.

The analog input sources (channels 1-4) can be applied directly to J9 (top or bottom side) or through
signal-conditioning modules available for the the modular EVM system. Terminal block J7 is connected in
parallel with the analog signal connections to J9.

Each input signal can be selected to connect directly to the analog inputs of the ADS1274 or they can use
the OPA1632 buffers that are provided. Switches S2-5 can be switched away from the ADS1274 to select
the Terminal Block (TBK) or towards the ADS1274 to select the Amplifier (AMP) for the analog inputs 1
through 4 as shown in

Figure 7

.

Figure 7. Amplifier Selection Switches

SBAU134A – August 2008 – Revised May 2009

ADS1174EVM, ADS1274EVM, ADS1174EVM-PDK, and ADS1274EVM-PDK

9

Submit Documentation Feedback

Содержание ADS1174EVM

Страница 1: ... and bills of material are included in this document The following related documents are available through the Texas Instruments web site at www ti com EVM Compatible Device Data Sheets Device Literature Number Device Literature Number ADS1274 SBAS367B OPA1632 SBOS286A ADS1174 SBAS373A SN74LVC2G157 SCES207K REF5025 SBOS410 TPS73018 SBVS054H REF3125 SBVS046C TPS65131 SLVS493B OPA2350 SBOS099C PCA95...

Страница 2: ...ing 18 16 NI VISA Driver Complete Installation 19 17 NI VISA Driver Verification Using Device Manager 19 18 ADCPro Software Start up Display Window 20 19 ADS1274EVM PDK Plug In Display Window 21 20 Install New Driver Wizard Screen 1 22 21 Install New Driver Wizard Screen 2 22 22 Install New Driver Wizard Screen 3 23 23 Install New Driver Wizard Screen 4 23 24 Install New Driver Wizard Screen 5 24 ...

Страница 3: ... ADC evaluation boards It is based on a number of plug in programs so it can be expanded easily with new test and data collection plug ins The ADS1174EVM PDK ADS1274EVM PDK is controlled by a plug in running in ADCPro For more information about ADCPro see the ADCPro Analog to Digital Converter Evaluation Software User s Guide literature number SBAU128 available for download from the TI web site Th...

Страница 4: ... J9 18 EXTREFN External Reference source input side of differential input J9 20 EXTREFP External Reference source input side of differential input J9 10 16 even Unused J9 15 Unused J9 9 19 odd J7 1 AGND Analog ground connections except J1 15 The ADS1274EVM 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 conveni...

Страница 5: ...ne J5 20 SDA SDA I2 C n a I2 C data Many pins on J5 have weak pull up pull down resistors These resistors provide default settings for many of the control pins Many pins on J5 correspond directly to ADS1274 pins See the ADS1274 product data sheet for complete details on these pins Most data communications are directed through DOUT1 The data from all eight channels can be observed on the DOUT1 pin ...

Страница 6: ...igital supply No J3 8 3 3VD 3 3V digital supply Always J3 9 VD1 Not used No J3 10 5VD 5V Used to generate 10V 10V The 1 8V for DVDD comes from the voltage regulator U16 using 3 3V as the source voltage input All of the power supplies AVDD 5V DVDD 1 8V and IOVDD 3 3V have corresponding jumpers J10 J11 AVDD J13 DVDD and J14 IOVDD that can be replaced with a current meter to measure the respective su...

Страница 7: ...er source is filtered and buffered by U3A Switch S1 chooses either the onboard reference or the external reference voltage that is connected to the reference pins of J9 Figure 4 illustrates the pinout for connector J1 Figure 5 shows switch S1 as it appears on the EVM Figure 4 Connector J1 Figure 5 Switch S1 SBAU134A August 2008 Revised May 2009 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM P...

Страница 8: ... can be run in the high speed mode the high resolution mode the low power mode or low speed mode with CLKDIV set to 1 If the performance of the device must be explored with CLKDIV set to 0 in the low power and low speed modes an external clock must be provided to the board either using the TOUT connection or having an external clock source connected to J18 The same is true if frequencies other tha...

Страница 9: ...minal block J7 is connected in parallel with the analog signal connections to J9 Each input signal can be selected to connect directly to the analog inputs of the ADS1274 or they can use the OPA1632 buffers that are provided Switches S2 5 can be switched away from the ADS1274 to select the Terminal Block TBK or towards the ADS1274 to select the Amplifier AMP for the analog inputs 1 through 4 as sh...

Страница 10: ...ort P10 of the I2 C port expander U18 is connected to a logic high level so that the position of switch S12 can be read back by software The right position of S12 marked FS selects the frame sync format In this format the signals are connected in this configuration The SCLK input of the converter is driven by the serial port signal CLKR pin J5 5 The signal from the selected clock source is connect...

Страница 11: ...the switches found on the EVM and the respective factory default conditions for each Table 6 List of Switches Switch Default Position Switch Description S1 Left Onboard Reference S2 S4 Left AIN2 4 Terminal Block amplifiers bypassed S5 Down AIN1 Terminal Block amplifiers bypassed S12 Right Frame sync format SBAU134A August 2008 Revised May 2009 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PD...

Страница 12: ...are is available from the TI website at www ti com The CD ROM shipped with the ADS1274EVM may not contain the latest software but the ADCPro installer will check for updates when executed if connected to the Internet and then give you the option of downloading and installing the latest version Refer to the ADCPro User Guide for instructions on installing and using ADCPro To install the ADS1274EVM ...

Страница 13: ...e MMB0 as shown in Figure 9 Set the Boot Mode switch to USB Connect 5V and 5VA on jumper block J13 if 5V is supplied from J14 5VA Leave 5V and VA disconnected on jumper block J13 If the PDK will be powered from an AC adapter connect J12 If the PDK will be powered through the terminal block disconnect J12 See Section 9 3 for details on connecting the power supply Figure 9 MMB0 Initial Setup SBAU134...

Страница 14: ...e pin alignment carefully before applying power to the PDK Step 4 Set the jumpers and switches on the ADS1274EVM as shown in Figure 7 note that these settings are the factory configured settings for the EVM Note that the default configuration for the EVM is to use external 10V supplies for the input amplifiers ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PDK 14 SBAU134A August 2008 Revised ...

Страница 15: ...nd bipolar 10V to 15V supply When the MMB0 DSP is powered properly LED D2 glows green The green light indicates that the 3 3V supply for the MMB0 is operating properly It does not indicate that the EVM power supplies are operating properly An AC adapter can be connected to barrel jack J2 on the MMB0 J2 is located next to the USB connector The adapter must output 6V to 7V dc The connector must be s...

Страница 16: ...ted Figure 12 Laboratory Power Supply Connection Note The software is continually under development These instructions and screen images are current at the time of this writing but may not exactly match future releases The program for evaluating the ADS1274EVM PDK is called ADCPro This program uses plug ins to communicate with the EVM The ADS1274EVM PDK plug in is included in the ADS1274EVM PDK pa...

Страница 17: ...talling the drivers for the hardware Figure 13 through Figure 16 are provided for reference to show the installation steps For the first screen Figure 13 it is not necessary to search for the software it has already been installed to your PC For the remaining steps accept the default settings Figure 13 NI VISA Driver Installation SBAU134A August 2008 Revised May 2009 ADS1174EVM ADS1274EVM ADS1174E...

Страница 18: ...tion www ti com Figure 14 NI VISA Driver Installation Question Figure 15 NI VISA Driver Installing 18 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PDK SBAU134A August 2008 Revised May 2009 Submit Documentation Feedback ...

Страница 19: ...allation of the NI VISA drivers You can verify proper installation by opening the Device Manager and locating as shown in Figure 17 Figure 17 NI VISA Driver Verification Using Device Manager SBAU134A August 2008 Revised May 2009 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PDK 19 Submit Documentation Feedback ...

Страница 20: ...t menu The screen in Figure 18 appears Figure 18 ADCPro Software Start up Display Window Step 2 Select ADS1274EVM from the EVM drop down menu The ADS1274EVM PDK plug in appears in the left pane as shown in Figure 19 20 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PDK SBAU134A August 2008 Revised May 2009 Submit Documentation Feedback ...

Страница 21: ...et loaded the operating system drivers Windows will display the Windows Install New Driver Wizard sequence illustrated in Figure 20 through Figure 24 Accept the default settings Note During the driver installation a message may appear indicating the firmware load has TIMED OUT Click OK and continue driver installation The plug in will attempt to download the firmware again once the driver installa...

Страница 22: ...n www ti com Figure 20 Install New Driver Wizard Screen 1 Figure 21 Install New Driver Wizard Screen 2 22 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PDK SBAU134A August 2008 Revised May 2009 Submit Documentation Feedback ...

Страница 23: ...it Operation Figure 22 Install New Driver Wizard Screen 3 Figure 23 Install New Driver Wizard Screen 4 SBAU134A August 2008 Revised May 2009 ADS1174EVM ADS1274EVM ADS1174EVM PDK and ADS1274EVM PDK 23 Submit Documentation Feedback ...

Страница 24: ...VISA USB Devices will disappear and a new item LibUSB Win32 Devices will appear as Figure 25 shows Figure 25 USBSytx Driver Verification Using Device Manager The driver installation wizard sequence should not appear again unless you connect the board to a different USB port The evaluation software is based on ADCPro a program that operates using a variety of plug ins The ADS1274EVM plug in is inst...

Страница 25: ... setting immediately updates on the board Settings on the ADS1274EVM correspond to settings described in the ADS1274 product data sheet see the ADS1274 data sheet for details Because the effective data rate of the ADS1274 depends upon settings of the Clock Freq and Operating Mode the Data Rate indicator in the upper right corner of the plug in interface is always visible and updates whenever a set...

Страница 26: ...ered in the Clock Frequency box the software will find the closest frequency that is possible for the PLL to synthesize and which is within the maximum allowable frequency for the mode selected and will set the clock to that frequency as well as display the actual frequency used in the Clock Frequency box once focus has moved from that control Figure 28 Clock Settings and Mode The Operating Mode c...

Страница 27: ...datapoints specified in the Test plug in Block Size control The ADS1274EVM PDK plug in disables all the front panel controls while acquiring and displays a progress bar as shown in Figure 31 Figure 31 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 If ADCPro stops responding...

Страница 28: ...R51 R70 Resistor Thick Film Chip 10 kΩ Panasonic ERJ 3GEYJ103V 5 1 10W Size 0603 9 1 47K R47 Resistor Thick Film Chip 47 kΩ Panasonic ERJ 3GEYJ473V 5 1 10W Size 0603 10 2 100K R1 R72 Resistor Thick Film Chip 100 kΩ Panasonic ERJ 3GEYJ104V 5 1 10W Size 0603 11 2 150K R53 R54 Resistor Thick Film Chip 150 kΩ Panasonic ERJ 3GEYJ154V 5 1 10W Size 0603 12 2 470K R48 R49 Resistor Thick Film Chip 470 kΩ P...

Страница 29: ... Instruments 33 1 U1 Precision Voltage Reference Texas REF3125AIDBZ Instruments 34 4 U8 U11 Fully Differential Amplifier Texas OPA1632DGN Instruments 35 1 U19 Single Inverter Texas SN74LVC1G04DBVR Instruments 36 1 U20 Single D Flip Flop Texas SN74LVC2G74DCTR Instruments 35 1 U6 Single 2 Line to 1 Data Texas SN74LVC2G157DCT Selector Multiplexer Instruments 36 1 U16 LDO Voltage Regulator 1 8 V 200 T...

Страница 30: ...1 L2 Inductor 4 7 µH 1 8 A 6x6mm EPCOS B82462G4472M SMD 53 5 S1 S5 Switch Mini Slide DPDT NKK SS22SDP2 54 1 S10 DIP Switch Half Pitch 8 Position C K TDA08H0SB1 55 1 S11 DIP Switch Half Pitch 6 Position C K TDA06H0SB1 56 1 S12 4PDT Slide Switch Top Actuator Tyco Alcoswitch MMS42 56 1 TP8 PCB Test Point Large Loop Keystone 5011 Through hole Electronics 57 7 N A Shorting Blocks Samtec SNT 100 BK G H ...

Страница 31: ...NP1 AINP2 AN1 AP1 AN2 AP2 AN3 AP3 AN4 AP4 VCOM SheetB SheetB Sch AINN3 AINN4 AINP3 AINP4 C17 2 2nF C0G C18 2 2nF C0G C19 2 2nF C0G C20 2 2nF C0G AINN1 AINN2 AINN3 AINN4 AINP1 AINP2 AINP3 AINP4 RA1 100K J5A TOP SAM_TSM 110 01 L DV P J5B BOTTOM SAM_SSW 110 22 F D VS K 1 2 J10 1 2 J12 1 2 J14 1 2 J13 AVDD 1 2 J11 VA VA 1 2 3 J15 VA VA 1 2 3 J16 VA VA RA2 100K IN 1 GND 2 EN 3 OUT 5 NR 4 U16 TPS73018DB...

Страница 32: ... 0 1uF C40 1 5nF C0G C41 1 5nF C0G C59 0 1uF 10V 10V R15 1K R13 1K R14 1K C60 0 1uF C57 0 1uF REFN REFP J9A TOP SAM_TSM 110 01 L DV P J9B BOTTOM SAM_SSW 110 22 F D VS K 8 2 1 3 6 4 5 VOCM U11 OPA1632 R62 49 9 R63 49 9 R16 1K C61 0 1uF C42 1 5nF C0G C43 1 5nF C0G C62 0 1uF 10V 10V R19 1K R17 1K R18 1K C63 0 1uF 8 2 1 3 6 4 5 VOCM U8 OPA1632 R56 49 9 R57 49 9 R4 1K C52 0 1uF C36 1 5nF C0G C37 1 5nF ...

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Страница 39: ...1 AINP2 AN1 AP1 AN2 AP2 AN3 AP3 AN4 AP4 VCOM SheetB SheetB Sch AINN3 AINN4 AINP3 AINP4 C17 2 2nF C0G C18 2 2nF C0G C19 2 2nF C0G C20 2 2nF C0G AINN1 AINN2 AINN3 AINN4 AINP1 AINP2 AINP3 AINP4 RA1 100K J5A TOP SAM_TSM 110 01 L DV P J5B BOTTOM SAM_SSW 110 22 F D VS K 1 2 J10 1 2 J12 1 2 J14 1 2 J13 AVDD 1 2 J11 VA VA 1 2 3 J15 VA VA 1 2 3 J16 VA VA RA2 100K IN 1 GND 2 EN 3 OUT 5 NR 4 U16 TPS73018DBV ...

Страница 40: ... 0 1uF C40 1 5nF C0G C41 1 5nF C0G C59 0 1uF 10V 10V R15 1K R13 1K R14 1K C60 0 1uF C57 0 1uF REFN REFP J9A TOP SAM_TSM 110 01 L DV P J9B BOTTOM SAM_SSW 110 22 F D VS K 8 2 1 3 6 4 5 VOCM U11 OPA1632 R62 49 9 R63 49 9 R16 1K C61 0 1uF C42 1 5nF C0G C43 1 5nF C0G C62 0 1uF 10V 10V R19 1K R17 1K R18 1K C63 0 1uF 8 2 1 3 6 4 5 VOCM U8 OPA1632 R56 49 9 R57 49 9 R4 1K C52 0 1uF C36 1 5nF C0G C37 1 5nF ...

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Страница 47: ... 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...

Страница 48: ...ice TI is not responsible or liable for any such statements TI products are not authorized 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 expertis...

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