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Related Manuals for Texas Instruments ADS8402 EVM, ADS8412 EVM
Summary of Contents for Texas Instruments ADS8402 EVM, ADS8412 EVM
- Page 1 ADS8402/ADS8412EVM User’s Guide December 2003 Data Acquistion SLAU126...
- Page 2 TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Following are URLs where you can obtain information on other Texas Instruments products & application solutions:...
- Page 3 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 incorporating the goods.
- Page 4 EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Copyright 2003, Texas Instruments Incorporated Mailing Address: Texas Instruments...
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Page 5: Read This First
Chapter 5 – Using the EVM Chapter 6 - ADS8402/ADS8412 BOM, Layout, and Schematic Related Documentation From Texas Instruments To obtain a copy of any of the following TI documents, call the Texas Instruments Literature Response Center at (800) 477 - 8924 or the Product Information Center (PIC) at (972) 644 - 5580. -
Page 6: Fcc Warning
Contents FCC Warning This equipment is intended for use in a laboratory test environment only. It gen- erates, 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. -
Page 7: Table Of Contents
EVM Overview ..............Features . - Page 8 Contents Figures 1 - 1 Input Buffer Circuit ............5 - 1 Top Layer—Layer 1 .
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Page 9: Evm Overview
This chapter contains the features of the ADS8402/ADS8412. Topic Features ............Introduction . -
Page 10: Features
Features 1.1 Features Full-featured evaluation board for the high-speed ADS8402 (1.25 MSPS) and the ADS8412 (2 MSPS) high speed, 16-bit, single channel, parallel interface SAR-type analog-to-digital converters. Onboard signal conditioning Onboard reference Input and output digital buffer Onboard decoding for stacking multiple EVMs 1.2 Introduction The ADS8402EVM and ADS8412EVM is a modular or stand alone EVM. -
Page 11: Analog Interface
The ADS8402/ADS8412EVM analog-to-digital converter has a unipolar differential input. A unipolar differential input is a differential signal (inverting and noninverting input is 180 degrees out of phase) that is level shifted such that the signals levels are always equal to or above zero volts. The peak-to-peak amplitude on each input pin can be as large as the reference voltage. -
Page 12: Signal Conditioning
Signal Conditioning 2.1 Signal Conditioning The ADS8402/ADS8412EVM comes installed with the unity gain buffer (U2) wired for single-ended in to differential out configuration. The common-mode voltage is derived from a REF3040 reference IC and is adjustable using a potentiometer (R9). The common-mode voltage pin of the THS4503 is set to 2 V on the evaluation module. -
Page 13: Reference
Figure 2 - 1. Input Buffer Circuit THS4503 1 kΩ +2.048 V 1 kΩ 2.2 Reference The EVM allows users to select from three reference sources. The ADS8402/ADS8412EVM provides an onboard 4.096-V reference, U3. The EVM also has the provision for users to supply a reference voltage via connecter P1 pin 20. -
Page 15: Digital Interface
The ADS8402/ADS8412 EVM is designed for easy interfacing to multiple platforms. TSM-110-01-T-DV-P provide a convenient dual row header/socket combination at P2 and P3. Consult Samtec at 1 - 800- SAMTEC- 9 for a variety of mating connector options. Table 3 - 1. Pinout for Parallel Control Connector P2 Connector.Pin P2.1 P2.3... -
Page 16: Jumper Settings For Decoder Outputs
Table 3 - 2. Jumper Settings for Decoder Outputs Reference Designator Reference Designator Set A[2..0] = 0x1 to generate RD pulse Set A[2..0] = 0x2 to generate RD pulse Set A[2..0] = 0x3 to generate Set A[2..0] = 0x4 to generate Set A[2..0] = 0x5 to generate Set A[2..0] = 0x6 to generate †... -
Page 17: Power Supply Requirements
The EVM accepts four power supplies. A dual ±Vs dc supply for the dual supply op-amps. Recommend ±7 Vdc supply. A single +5-Vdc supply for the analog section of the board (A/D + Reference). A single +5-V or +3.3-Vdc supply for the digital section of the board (A/D + address decoder + buffers). -
Page 19: Using The Evm
The ADS8402/ADS8412EVM serves three functions: 1) As a reference design 2) As a prototype board 3) As a software test platform Topic As a Reference Board ......... As a Prototype Board . -
Page 20: As A Reference Board
As a Reference Board 5.1 As a Reference Board As a reference design, the ADS8402/ADS8412EVM contains the essential circuitry to showcase the analog-to-digital converter. This essential circuitry includes the input amplifier, reference circuit, and buffers. The EVM analog input circuit is optimized for 100-kHz sine wave. Therefore, users may need to adjust the resistor and capacitor values of the A/D input circuit. -
Page 21: Ads8402/Ads8412Evm Bom, Layout, And Schematic
ADS8402/ADS8412EVM BOM, Layout, and This chapter contains the ADS8402/ADS8412EVM bill of materials, the layouts, and the schematics. Topic ADS8402/ADS8412EVM Bill of Materials ADS8402/ADS8412EVM Layout ADS8402/ADS8412EVM Schematic ADS8402/ADS8412EVM BOM, Layout, and Schematic Chapter 6 Schematic Page ...... -
Page 22: Ads8402/Ads8412Evm Bill Of Materials
ADS9393EVM Bill of Materials 6.1 ADS9393EVM Bill of Materials Table 6 - 1 ADS8402/ADS8412EVM. The schematic diagram is also provided for reference. dataconvapps@list.ti.com Table 6 - 1. ADS8402/ADS8412EVM Bill Of Materials Item Value Designator 0 Ω R15, R21 24.9 Ω R12, R13 100 Ω... - Page 23 Item Value Designator 10 µF C14, C24, C27, 22 µF C38, C39, C61 1 Ω RP1, RP3 100 Ω 10 kΩ L1, L2, L3 U1, U3 31† OPA627AU U5, U6, U7 5X2X.1 6X2X.1 SMA_PCB J2, J4 10X2X.1 P1, P2 16X2X.1_S MT_plug_&...
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Page 24: Ads8402/Ads8412Evm Layout
ADS8402/ADS8412EVM Layout 6.2 ADS8402/ADS8412EVM Layout Figure 6 - 1. Top Layer—Layer 1 Figure 1. -
Page 25: Ground Plane-Layer
ADS8402/ADS8412EVM Layout Figure 6 - 2. Ground Plane—Layer 2 ADS8402/ADS8412EVM BOM, Layout, and Schematic... -
Page 26: Power Plane-Layer
ADS8402/ADS8412EVM Layout Figure 6 - 3. Power Plane—Layer 3... -
Page 27: Bottom Layer-Layer
ADS8402/ADS8412EVM Layout Figure 6 - 4. Bottom Layer—Layer 4 ADS8402/ADS8412EVM BOM, Layout, and Schematic... -
Page 28: Ads8402/Ads8412Evm Schematic
ADS8402/ADS8412EVM Schematic 6.3 ADS8402/ADS8412EVM Schematic The following pages contain the schematic for the ADS8402/ADS8412EVM. - Page 29 DB[15...0] DB[15...0] DB[15..0] BUSY BUSY B_RESET B_RESET B_BYTE B_BYTE B_CONVST B_CONVST B_RD B_RD B_CS B_CS INTc DC_CS B_BUSY RESET BYTE CONVST...
- Page 30 +VBD RESET BYTE CONVST AGND AGND REFM REFM DB[15...0] +VBD DB10 DB10 DB11 DB11 DB12 DB12 DB13 DB13 DB14 DB14 DB15 DB15 AGND AGND...
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