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User's Guide

SBAU203 – July 2013

ADS1x20EVM

ADS1x20EVM

This user's guide describes the characteristics, operation, and use of the ADS1x20EVM. These evaluation
modules are an evaluation system for the

ADS1220

, a 24-bit, low-power, multichannel, delta-sigma (

ΔΣ

),

analog-to-digital converter (ADC) and the

ADS1120

, which is the 16-bit version of the ADS1220. The EVM

allows evaluation of all aspects of the ADS1x20 devices.

This document includes an EVM Quick Start, hardware and software details, bill of materials, and
schematic.

Table 1

lists the related documents available through the Texas Instruments web site at

www.ti.com

.

Table 1. EVM-Compatible Device Data Sheets

Device

Literature Number

Device

Literature Number

ADS1120

SBAS535

MSP430F5528

SLAS590

ADS1220

SBAS501

TPS3838L30

SLVS292

SN74LVC2G157

SCES207

SN74LVC125A

SCAS290

TPS76333

SLVS181

MSP430, ADCPro are trademarks of Texas Instruments.
SPI is a trademark of Motorola.
I

2

C is a trademark of NXP Semiconductors.

Omega is a registered trademark of Omega Engineering Limited.
Samtec is a trademark of Samtec, Inc.
Vishay is a registered trademark of Vishay Intertechnology, Inc.
All other trademarks are the property of their respective owners.

1

SBAU203 – July 2013

ADS1x20EVM

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Copyright © 2013, Texas Instruments Incorporated

Summary of Contents for ADS1 20EVM Series

Page 1: ...nts available through the Texas Instruments web site at www ti com Table 1 EVM Compatible Device Data Sheets Device Literature Number Device Literature Number ADS1120 SBAS535 MSP430F5528 SLAS590 ADS1220 SBAS501 TPS3838L30 SLVS292 SN74LVC2G157 SCES207 SN74LVC125A SCAS290 TPS76333 SLVS181 MSP430 ADCPro are trademarks of Texas Instruments SPI is a trademark of Motorola I2 C is a trademark of NXP Semi...

Page 2: ...Data Sheets 1 2 Default Jumper and Switch Configuration 4 3 Critical Connections 5 4 Jumper and Switch Descriptions 10 5 J4 Primary Analog Interface Pinout 11 6 J1 and J6 Bridge Sensor Connectors 11 7 J2 RTD Terminal Block Connector 12 8 J5 Auxiliary Connector 13 9 JTAG Interface Connections 14 10 JAC External Interface Connector 15 11 JDB External Interface Connector 15 12 ADS1x20EVM Bill of Mate...

Page 3: ...er with JTAG interface Compatible with the TI LaunchPad The ADS1x20EVM includes an interface for serial communication that can be used with ADCPro to quickly evaluate the device This manual covers the operation of the ADS1x20EVM Throughout this document the abbreviation EVM and the term evaluation module are synonymous with the ADS1120EVM and ADS1220EVM For clarity of reading the remainder of this...

Page 4: ...ns 2 4 AVDD supply connection to 5 V or 3 3 V default to 3 3 V JP7 Short USB power connected to 5 V JP8 Short U5 output connected to 3 3 V 2 2 ADS1220EVM Operation To prepare to evaluate the ADS1220 with the ADS1220EVM complete the following steps 1 Verify the jumpers on the ADS1220EVM are as shown in Figure 1 note that these settings are the factory configured settings for the EVM 2 Using ADCPro ...

Page 5: ... Inputs The analog inputs for the ADS1220EVM are connected to J1 J2 J3 J4 and J6 Channels 1 to 4 and the external reference connect to header J4 3 2 Digital Control The digital control signals can be applied directly to connectors JAC and JDB The connector footprints are on the bottom side of the board and the connectors are not installed 3 3 Power Supply The ADS1220EVM requires power rails as fol...

Page 6: ...equency of the ADS1220 and the operating clock mode Normal Duty Cycle or Turbo The default operating mode is Normal The Data Rate is adjusted by making the desired selection from the drop down menu The Gain indicator in the upper left corner of the plug in interface see Figure 2 is always visible and updates whenever a setting changes that affects the gain The indicated values are representative o...

Page 7: ... output response of the digital filter The default condition is to have No 50 60 Hz Rejection Other options from the drop down menu allow for Simultaneous 50 60 Hz Rejection 50 Hz Rejection Only or 60 Hz Rejection Only Four other button options appear on the I O Config tab The first button controls the PGA Bypass When the PGA Bypass button is active indicated when lit green the Gain choice is limi...

Page 8: ... power savings can be calculated by comparing the total power used while converting as compared to the total power of the power down mode 4 3 Current Ref Tab The Current Ref tab allows various reference options to be selected along with the control and routing of IDAC currents as shown in Figure 3 Figure 3 Current and Ref Reference Select selects the reference for the ADS1220 The drop down menu li...

Page 9: ... 1000uA and 1500uA If both IDACs are routed to the same output the IDAC current available is twice the indicated IDAC Magnitude The IDAC current sources can be routed independently or to the same output The control for the IDAC 1 Routing and IDAC 2 Routing have the same drop down menu options If the IDAC routing is Off then the IDAC being controlled is disabled and no current is sourced This condi...

Page 10: ...og supply source Short 3 to 4 bottom AVDD is connected to 3 3 V default Short External oscillator is used as the clock source requires installation JP4 Clock source Open On board or external J8 clock source default Short External controller JP5 Digital control source Open On board controller Short Controller clock not currently available JP6 External clock source Open Connected J8 clock source def...

Page 11: ...is a standard single row 4 pin header with 0 1 inch pin spacing Both connectors allow for excitation to be connected to the outer pins while the differential signals from the sensor connect to the inner pins Table 6 lists pin descriptions Bridge excitation is provided from the analog supply as needed JP1 connects EXC directly to AVDD JP2 connects EXC directly to AGND To conserve power EXC can also...

Page 12: ...ction to three and four wire RTDs A two wire RTD requires a jumper between J2 1 and J2 2 as well as between J2 3 and J2 4 Three wire RTDs require an additional excitation current 4 Pin 1 is at the top left hand corner of the EVM located opposite from the reference designator 5 2 4 Thermocouple Connector J3 Provision for a miniature thermocouple connector is provided on the EVM The socket connector...

Page 13: ...of the computer An extension cable can also be used instead of the direct connection U7 uses two hardware peripherals to control devices on the ADS1220EVM One peripheral uses SPI to communicate with the ADS1220 The second peripheral is an I2 C master The primary purpose for the I2 C is for communication to the EEPROM U4 that contains specific information regarding the configuration of the EVM I2 C...

Page 14: ...4 pin debugger connections in relation to J10 The information can be used to create an adapter between J10 and the 14 pin debugger cable The J10 footprint is a 2 mm pitch spacing if a socket or header is used Table 9 JTAG Interface Connections Function Debugger Connector Pin Number J10 GND Pin 9 8 N C Pin 6 n a N C Pin 10 n a N C Pin 12 n a N C Pin 13 n a N C Pin 14 n a RST Pin 11 7 TCK Pin 7 5 TD...

Page 15: ...pply 5V 2 Digital power supply 3 3V 1 1 N C N C 5 10 12 14 16 20 Power supply ground AGND DGND 4 1 Pin 1 is bottom side below and to the right of the reference designator Table 11 JDB External Interface Connector Function Signal Name Pin Number JDB ADS1220 data out DOUT DRDY 18 I2 C serial clock SCL 14 I2 C serial data SDA 12 N C N C 1 1 3 11 13 15 17 19 20 Power supply ground AGND DGND 2 SPI seri...

Page 16: ...SMT Vert 5x2 pin 100mil Samtec TSM 105 01 L DV P spacing 12 1 J6 Header Male 4 pin 100mil spacing Samtec TSW 104 07 L S 13 1 J7 Terminal Block Miniature 2 position On Shore ED555 2DS Technology Inc 14 5 J8 JP1 2 JP7 8 Header Male 2 pin 100mil spacing Samtec TSW 102 07 L S 15 1 J9 Connector USB Plug 4 position RA Molex Inc 0480371000 16 1 JP3 Header Male 2x2 pin 100mil spacing Samtec TSW 102 07 L D...

Page 17: ...256 I ST 36 1 U5 IC 3 3V LDO Regulator 150mA TI TPS76333DBVR 37 1 U6 IC Supply Voltage Supervisor TI TPS3838L30DBVT 38 1 U7 IC Microcontroller TI MSP430F5528IRGCT 39 1 U8 IC Quad Gate Tri State Buffer TI SN74LVC125APWR 40 1 12MHz X1 Crystal 20ppm SMD Abracon ABM8G 12 000MHZ 18 D2Y T 41 1 PCB 3 28 In x 1 70 In x 0 062 In Any 6544486 42 5 Shunt 100 mil Black 3M 969102 0000 DA 17 SBAU203 July 2013 AD...

Page 18: ... 5 XOUT 13 P5 4 XIN 12 VBUS 53 VUSB 54 V18 55 P5 2 XT2IN 57 P5 3 XT2OUT 58 TEST SBWTCK 59 AVSS1 14 DVCC1 15 DVSS1 16 VCORE 17 P1 0 TA0CLK ACLK 18 P1 1 TA0 0 19 P1 2 TA0 1 20 P1 3 TA0 2 21 P1 4 TA0 3 22 P1 5 TA0 4 23 P1 6 TA1CLK CBOUT 24 P1 7 TA1 0 25 P2 0 TA1 1 26 P2 1 TA1 2 27 P2 2 TA2CLK SMCLK 28 P2 3 TA2 0 29 P2 4 TA2 1 30 P2 5 TA2 2 31 P2 6 RTCCLK DMAE0 32 P2 7 UCB0STE UCA0CLK 33 P3 0 UCB0SIMO...

Page 19: ...ency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES 003 rules which are designed to provide reasonable protection against radio frequency interference Operation of the equipment may cause interference with radio communications in which case the user at his own expense will be required to take whatever measures may be required t...

Page 20: ... its gain should be so chosen that the equivalent isotropically radiated power e i r p is not more than that necessary for successful communication This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this l...

Page 21: ...tained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product Also please do not transfer this product unless you give the same notice above to the transferee Please note that if you could not follow the instructions above you will be subject to penalties of Radio Law of Japan Texas Instruments Japan Limited address 24 1 Nishi Shinjuku 6 c...

Page 22: ...derations per the user guidelines Exceeding the specified EVM ratings including but not limited to input and output voltage current power and environmental ranges may cause property damage personal injury or death If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads Any loads appl...

Page 23: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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