TLC3578EVM Family User’s Guide August 2003 Data Acquisition−Digital/Analog Converters SLAU110
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use.
EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range of 15 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
How to Use This Manual Preface Read This First About This Manual This user’s guide describes the characteristics, operation, and use of the following evaluation boards: - TLC3578 EVM Bipolar-Input, 8-channel 14-bit serial analog-to-digital converter - TLC3574 EVM Bipolar-Input, 4-channel 14-bit serial analog-to-digital converter - TLC3548 EVM Unipolar-Input, 8-channel 14-bit serial analog-to-digital converter - TLC3544 EVM Unipolar-Input, 4-channel 14-bit serial analog-to-digital converter - TLC2578
Trademarks FCC Warning This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference.
Contents Contents 1 EVM Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Analog Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Analog Interface Block Diagram . .
Contents Figures 2−1 5−1 5−2 6−1 6−2 6−3 6−4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EVM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DSK-To-EVM Stackup Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Top Layer . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 EVM Overview Each evaluation board is based on the equivalent ADC. All ADCs use a synchronous serial interface which can be simply interfaced to many microcontrollers using the SPI protocol. Each EVM also incorporates a stable voltage reference, and operational amplifier to ensure a low-noise voltage reference for the ADC. Topic 1.1 Page Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features 1.
Chapter 2 Analog Interface Topic Page 2.1 Analog Interface Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 Signal Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.3 Single Supply Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.4 Physical Pinout Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.5 ADC Reference Voltage .
Analog Interface Block Diagram 2.1 Analog Interface Block Diagram A block diagram for the analog interface of the EVM is shown in Figure 2−1. Figure 2−1. Block Diagram P1 / J1 Signal Conditioning TLC3578 TLC3574 TLC3548 TLC3544 TLC2578 TLC2574 The channels are arranged to comply with the EVM standard developed for data converters. This standard defines eight channels of analog I/O on each EVM module. 2.
Physical Pinout Description 2.4 Physical Pinout Description 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 P1. This header/socket provides access to the analog input pins of the TLV2553/6. Consult Samtec at www.samtec.com or 1−800−SAMTEC−9 for a variety of mating connector options. Table 2−1. Analog Input Pinout Description Pin Number Signal Description J1.
Configuration Options 2.6 Configuration Options There are a number of options available via shorting jumpers. These are detailed below: Table 2−3. Jumper Settings Reference Designator Factory Set Condition Position Description Optional Position W1 Single supply operation 1−2 Not installed W2 Select negative supply for op amp −Vs AGND (0 V) W3 Select positive supply for op amp +Vs +Vcc (5 V) W4 Select signal source for channel 0 Signal is via op amp Signal is directly from P1.
Chapter 3 Digital Interface The digital interface for the EVM is simply the appropriate digital signals from the ADC routed and presented to the 20-pin digital interface connector. Topic 3.1 Page Physical Pinout Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Pinout Description 3.1 Physical Pinout Description The EVM is designed for easy interfacing to multiple 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. This header/socket combination provides access to the digital control and serial data pins of the EVM. Consult Samtec at www.samtec.com or 1−800−SAMTEC−9 for a variety of mating connector options. Table 3−1.
Chapter 4 Power Supply The EVM accepts four power supplies. - A dual ± Vs dc supply for the dual-supply op-amps. - A single 5.0 V dc supply for the analog section of the ADC. - A single 3.3 V to 5 V dc supply for the digital section of the ADC. There are two ways to provide these voltages. - Hook-up the test points on the EVM. The test points are clearly labeled +Vdd (3.3 V to 5 V), +5VA, +Vs (up to 18 V depending upon the amplifiers) and –Vs (up to –18 V depending upon the amplifiers).
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Chapter 5 Getting the Most From Your EVM A wide range of prototyping options and software solutions are available from TI, and offer additional flexibility, reducing your time-to-market. Hardware and software offerings from TI help you easily get from concept to hardware and software prototype. Topic 5.1 Page Additional Hardware Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additional Hardware Options 5.1 Additional Hardware Options In general there are three hardware directions that the user can take with the EVM. 5.1.1 Stand-Alone EVM The EVM can be used on its own. Using the EVM in this manner obliges the user to provide a custom digital interface between the EVM and a host system. Users are entirely responsible for ensuring proper timing requirements are met in addition to providing any glue logic necessary.
Additional Hardware Options Figure 5−1. EVM Selection TMS320C2000 Interface Card TLC3574 EVM TMS320C6711 DSP TMS320C3000 Interface Card TMS320C6711 DSK TLC3578 EVM TLC3544 EVM TMS320C5K / 6K Interface Card TLC3548 EVM 1. Select DSP 2. Select DSK 3. Select Interface Card. TLC3578 EVM TLC3574 EVM Figure 5−2. DSK-To-EVM Stackup Diagram C5K / 6K Interface Card Evaluation Module Site Amplifier Site C5K / 6K Interface Card DSK 80-Pin DSK Common Connector 5.1.
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Chapter 6 Bill of Materials, Board Layouts, and Schematic This chapter contains the EVM bill of materials, board layouts and schematics. Topic Page 6.1 Bill of Materials for EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 6.2 Board Layouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 6.3 EVM Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bill of Materials for EVM 6.1 Bill of Materials for EVM Item no. 1 Qty Value Ref Des 1 0R R19 2 2 0R R8, R17 3 1 10R R15 4 9 33R 5 4 100R 6 2 10 KΩ R1, R2, R3, R4, R5, R6, R7, R12, R13 R10, R11, R20, R21 R16, R18 7 1 10 pF 8 8 0.
Bill of Materials for EVM 22 1 TLC3578 U4 Alternate TLC3574 U4 Alternate TLC3548 U4 Alternate TLC3544 U4 Alternate TLC2578 U4 Alternate TLC2574 U4 23 2 24 1 25 4 TP_.
Board Layouts 6.2 Board Layouts Figure 6−1.
Board Layouts Figure 6−2. Internal Plane 1 Figure 6−3.
Board Layouts Figure 6−4.
EVM Schematic 6.3 EVM Schematic The EVM schematic is a PDF attachment following this page.
1 2 3 4 5 6 Revision History REV ECN Number Approved D D P1 C P3 TLC3578 TLC3578.sch 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CH0 CS* CH1 CLKX CH2 R17 CH3 0R CH4 FSX FSR CH5 DATA_IN CH6 B_DATA_OUT CH7 B_INT*/EOC REFREF+ GPIO_1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 C DGND AGND B B PWR & REF PWR & REF.sch ti A A 12500 TI Boulevard.
1 2 3 4 5 6 Revision History REV ECN Number Approved GPIO_1 FSX DVdd FS CS* W10 CSTART* W8 DVdd D W1 C11 R9 W9 D R18 DGND Not Installed 10K Not Installed R16 10K R8 AGND 0R CH0 Amplifier +Supply +5V_s W4 Amplifier -Supply 11 12 13 R7 14 33R CH6 C10 27nF R2 15 33R 16 C5 27nF AGND 7 AIN0 CS* AIN1 AIN2 SCLK AIN3 SDI AIN4 CSTART* INT* / EOC 33R C 100R CLKX U6A DATA_IN 5 DATA_OUT 24 CSTART* 4 INT*/EOC 2 2 A A B_DATA_OUT 4 Y SN74LVC1G07 B_INT*/EOC
1 2 3 4 5 6 Revision History REV U5B 1 NC Approved U6B Vcc 5 DVdd 1 C23 DGND3 ECN Number GND DGND3 0.1uF NC 5 Vcc DVdd C24 GND 0.1uF +5VA D SN74LVC1G07 D SN74LVC1G07 +5VA C16 AGND +5V_s + C19 10uF 0.1uF +VA FB3 W3 Amplifier +Supply AGND +VA FB2 +V_s FB1 -V_s +3.3V_D C13 DVdd 9 7 5 3 1 Vdd W6 R15 P5 AGND 10 8 6 4 2 10R + C12 10uF 0.1uF -VA +5V_D + C21 10uF 0.1uF C1 C2 10uF + C22 DGND -VA 0.
