User's Guide SNLU146 – JUNE 2013 DAC161S997EVM User's Guide 1 Introduction The Texas Instruments DAC161S997EVM evaluation module (EVM) helps designers evaluate the operation and performance of the DAC161S997 4-20mA Loop Drive with SPI control. The EVM contains a low cost MSP430G2553 microcontroller which comes pre-loaded with firmware to communicate with the Labview based PC Software. A JTAG header is provided which can be used to program custom firmware.
EVM Setup 2 www.ti.com EVM Setup This section describes the jumpers and connectors on the EVM as well and how to properly connect, set up, and use the DAC161S997EVM. 2.1 Input/Output Connector Description 1. J1 : Loop Connector. Loop+ and Loop- Pins. 2. J2 : JTAG Connector. Used to debug/flash on-board MSP430G2553 3. J3 : General Purpose I/O. Can be used to connect to a SPI-based Analog front end such as the LMP90100 from TI’s SensorAFE family. 4. DAC_CUR: Power supply for DAC161S997.
Software Installation www.ti.com Figure 3. • • Click Next, read the license agreement and complete the first portion of the installation. Next, the FTDI drivers are installed automatically. Figure 4.
Software Installation www.ti.com Figure 5. • Click Next. Once the drivers are installed a Completing the Device Driver Installation Wizard window. Then, Click Finish to complete the installation. Figure 6. • • 4 Before you launch the DAC161S997 Software, Connect connect the DAC161S997EVM to a USB port of your computer and connect the Loop supply voltage. Open the computer's "Device Manager" and verify that a new COM port named "USB Serial Port" has been added in the Ports(COM&LPT) section.
Software Installation www.ti.com Figure 7. • • Make a note of the assigned COM port number; this number is needed to connect the PC to the DAC161S997EVM. Run the DAC161S997 Software and select the COM port that was assigned and click on connect. Figure 8. • On start-up, the software retrieves all the DAC161S997 registers and updates the software accordingly.
Software Installation www.ti.com Figure 9. • • • 6 The DAC output current can be set in the Current Output field, and the Error current levels can also be set in the appropriate fields. Any error conditions are indicated and can be cleared when desired. Individual registers can be set directly if desired.
Board Layout www.ti.com 4 Board Layout Figure 10. Top Assembly Layer Figure 11.
Board Layout www.ti.com Figure 12.
Schematic www.ti.com 5 Schematic Figure 13.
Bill of Materials 6 www.ti.com Bill of Materials Designator Quantity Value Description Package Reference Part Number C1 1 0.1µF CAP, CERM, 0.1uF, 50V, +/-5%, X7R, 1206 1206 C1206C104J5RACTU C2 1 3.3µF CAP, TANT, 3.3uF, 50V, +/-10%, 0.8 ohm, 7343-31 SMD 7343-31 TPSD335K050R0800 C4, C17 2 1000pF CAP, CERM, 1000pF, 50V, +/10%, C0G/NP0, 0603 603 06035A102KAT2A C5 1 4.7µF CAP, TANT, 4.7uF, 10V, +/-10%, 1.4 ohm, 3216-18 SMD 3216-18 T495A475K010ZTE1K4 C7, C23, C24 3 0.
Bill of Materials www.ti.com Designator Quantity Value Description Package Reference Part Number R2, R10 2 200Ω RES, 200 ohm, 1%, 0.25W, 1206 1206 CRCW1206200RFKEA R3 1 100k RES, 100k ohm, 1%, 0.1W, 0603 603 CRCW0603100KFKEA R4 1 47k RES 47K OHM 1/10W 5% 0603 SMD 603 ERJ-3GEYJ473V R5, R8 2 20.0Ω RES, 20.0 ohm, 1%, 0.125W, 0805 805 CRCW080520R0FKEA R6, R7 2 270E RES 270 OHM 1/10W 5% 0603 SMD 603 ERJ-3GEYJ271V R9 1 0 RES, 0 ohm, 5%, 0.
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
