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TLC3578EVM Family
User’s Guide
August 2003 Data Acquisition−Digital/Analog Converters
SLAU110
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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. All products are sold subject to TI’s terms and conditions of sale supplied at the t
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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. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product
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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. Please consult the EVM Us
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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 TL
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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. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his o
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Contents Contents 1 EVM Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 2 Analog Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.1 Analog Interface Block
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Contents Figures 2−1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 5−1 EVM Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5−2 DSK-To-EVM Stackup Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 6−1 Top Layer . . . . . . . . . . . . . . . . . .
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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 micro- controllers 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 Page 1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 EVM Overview 1-1
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Features 1.1 Features Evaluation board featuring one of the following: TLC3578 ADC (order TLC3578 EVM) TLC3574 ADC (order TLC3574 EVM) TLC3548 ADC (order TLC3548 EVM) TLC3544 ADC (order TLC3544 EVM) TLC2578 ADC (order TLC2578 EVM) TLC2574 ADC (order TLC2574 EVM) Onboard reference, with recommended buffer circuitry Suggested signal conditioning circuitry for 1 channel only 1-2
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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 .
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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. 2.2 Signal Conditioning The facility exists for the signal connected to channel 0 to be conditio
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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 Header Socket P1.2 J1.2 CH0 Channel 0 input, can be direct from
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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 Factory Set Condition Optional Position Reference Description Position Designator Designator 1−2 2−3 W1 Single supply operation 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 P1.2 W5
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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 Page 3.1 Physical Pinout Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Digital Interface 3-1
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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. Digital Signal Pinout Description Pin Numb
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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). Use
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4-2
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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 Page 5.1 Additional Hardware Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Getting the Most From Your EVM 5-1
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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. Users must also provide the necessary analog interfac
