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Summary of Contents for Texas Instruments ADS64XX EVM
- Page 1 ADS64XX EVM User's Guide User's Guide April 2007 SLAU196...
- Page 2 SLAU196 – April 2007 Submit Documentation Feedback...
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Page 3: Table Of Contents
Contents ........................Overview ............... ADS64XX EVM Quick-Start Procedure ...................... Circuit Description ....................Schematic Diagram .................... ADC Circuit Function ................Deserialization and the TSW1200 ......................ADC Evaluation .................... Hardware Selection ................. Coherent Input Frequency Selection ....................Physical Description ...................... PCB Layout .................... - Page 4 List of Figures ........................................................................ADS64XX EVM Setup ....................Layer 1, Top Silkscreen ......................Layer 2, Top Side ..................... Layer 3, Gound Plane ...................... Layer 4, Power Plane ...................... Layer 5, Bottom Side ....................Layer 6, Bottom Silkscreen .........................
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Page 5: Overview
Using the quick-start procedure, many users can begin evaluating the ADC in a minimal amount of time. The quick-start procedure includes details on how to set up the ADS64XX EVM used in conjunction with TI's high-speed LVDS deserializer. A complete listing of all EVM features follows in Section 2. - Page 6 Overview ADS64XX EVM. 6. ADS64XX and TSW1200: Switch power supplies on. 7. ADS64XX: Using a low-phase-noise, filtered frequency generator with 50-Ω source output impedance, generate a 0-V offset, 1.5-Vrms sine-wave clock into J12. The frequency of the clock must be within the specification for the device speed grade.
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Page 7: Circuit Description
www.ti.com Circuit Description Circuit Description Schematic Diagram The schematic diagram for the EVM is in Section 4.3. ADC Circuit Function The following sections describe the function of individual circuits. Refer to the relevant data sheet for device operating characteristics. 2.2.1 ADC Operational Mode By default, the ADC is configured to operate in parallel-mode operation, because the surface-mount jumper asserts a 3.3-V state to the ADC reset pin. - Page 8 www.ti.com Circuit Description For an ac-coupled system, users should use the voltage divider R9 and R18 to set the common-mode input of the amplifier, which should be set to the midpoint of the amplifier supply. C46 and C47 ac-couple the system, and the ADC inputs can then be biased by the R14 and R15 combination. Another ac-coupled approach, not supported on this EVM, would be to use a transformer at the outputs of the THS4509.
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Page 9: Deserialization And The Tsw1200
www.ti.com Circuit Description 2.2.4 ADC Clock Input Users should connect a filtered, low-phase-noise clock input to J12. A transformer, T5, provides the conversion from a single-ended clock signal into a differential clock signal. When selecting the clock signal level, users should account for the transformer having an impedance ratio of 4, with a voltage step-up of 2. -
Page 10: Adc Evaluation
www.ti.com ADC Evaluation ADC Evaluation This chapter describes how to set up a typical ADC evaluation system that is similar to what TI uses to perform testing for datasheet generation. Consequently, the information in this section is generic in nature and is applicable to all high-speed, high-resolution ADC evaluations. -
Page 11: Coherent Input Frequency Selection
www.ti.com ADC Evaluation Coherent Input Frequency Selection Typical ADC analysis requires users to collect the resulting time-domain data and perform a Fourier transform to analyze the data in the frequency domain. A stipulation of the Fourier transform is that the signal must be continuous-time;... -
Page 12: Ads64Xx Evm Setup
ADC Evaluation Figure 3. ADS64XX EVM Setup SLAU196 – April 2007 Submit Documentation Feedback... -
Page 13: Physical Description
www.ti.com Physical Description Physical Description This chapter describes the physical characteristics and PCB layout of the EVM. PCB Layout The EVM comprises six layers and is 62 mils thick. The EVM features a split ground plane, which can be shorted together under the ADC by using the two exposed gold-plated strips seen in Figure 8 to make a low-impedance connection between ground planes. -
Page 14: Layer 2, Top Side
www.ti.com Physical Description K002 Figure 5. Layer 2, Top Side SLAU196 – April 2007 Submit Documentation Feedback... -
Page 15: Layer 3, Gound Plane
www.ti.com Physical Description K003 Figure 6. Layer 3, Gound Plane SLAU196 – April 2007 Submit Documentation Feedback... -
Page 16: Layer 4, Power Plane
www.ti.com Physical Description K004 Figure 7. Layer 4, Power Plane SLAU196 – April 2007 Submit Documentation Feedback... -
Page 17: Layer 5, Bottom Side
www.ti.com Physical Description K005 Figure 8. Layer 5, Bottom Side SLAU196 – April 2007 Submit Documentation Feedback... -
Page 18: Layer 6, Bottom Silkscreen
www.ti.com Physical Description K006 Figure 9. Layer 6, Bottom Silkscreen SLAU196 – April 2007 Submit Documentation Feedback... -
Page 19: Bill Of Materials
www.ti.com Physical Description Bill of Materials Table 3 is the bill of materials for the ADS64XXEVM. Table 3. ADS64XXEVM Bill of Materials Reference Quantity Part Part Number Manufacturer Installed 22 µF C1, C5, C8, C10 ECS-T1CC226R Panasonic 10 µF C2, C9 ECS-H1CC106R Panasonic 1 µF... - Page 20 www.ti.com Physical Description Table 3. ADS64XXEVM Bill of Materials (continued) Reference Quantity Part Part Number Manufacturer Installed R28, R29, R32, R36, R72, R73, R74, R75, R76, R77, 1 kΩ ERJ-3EKF1001V Panasonic R78, R79, R80, R81, R82 0 Ω R30, R84 ERJ-3GEY0R00V Panasonic R33, R34, R40, R41, R44,...
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Page 21: Pcb Schematics
www.ti.com Physical Description PCB Schematics Figure 10. Sheet 1 of 5 SLAU196 – April 2007 Submit Documentation Feedback... -
Page 22: Sheet 2 Of
www.ti.com Physical Description Figure 11. Sheet 2 of 5 SLAU196 – April 2007 Submit Documentation Feedback... -
Page 23: Sheet 3 Of
www.ti.com Physical Description Figure 12. Sheet 3 of 5 SLAU196 – April 2007 Submit Documentation Feedback... -
Page 24: Sheet 4 Of
www.ti.com Physical Description Figure 13. Sheet 4 of 5 SLAU196 – April 2007 Submit Documentation Feedback... -
Page 25: Sheet 5 Of
www.ti.com Physical Description Figure 14. Sheet 5 of 5 SLAU196 – April 2007 Submit Documentation Feedback... - Page 26 EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
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Page 27: Important Notice
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. - Page 28 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments ADS6423EVM ADS6443EVM...
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