Related Manuals for Texas Instruments DAC8574
Summary of Contents for Texas Instruments DAC8574
- Page 1 DAC8574 Evaluation Module User’s Guide June 2003 Data Acquisition - Digital/Analog Converters SLAU109...
- 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 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 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. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright 2003, Texas Instruments Incorporated...
- Page 5 About This Manual This user’s guide describes the characteristics, operation, and the use of the DAC8574 evaluation module. It covers all pertinent areas involved to properly use this EVM board along with the devices that it supports. The physical PCB layout, schematic diagram and circuit descriptions are included.
- Page 6 PDS-1309B Questions about this or other Data Converter EVM’s? If you have questions about this or other Texas Instruments Data Converter evaluation modules, feel free to e-mail the Data Converter Application Team at [email protected]. Inlcude in the subject heading the product you have questions or concerns with.
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Page 7: Table Of Contents
Contents Contents EVM Overview ..............Features . - Page 8 2 - 8 DAC8574 EVM Test Parameters and Results ........
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Page 9: Evm Overview
Chapter 1 EVM Overview This chapter gives a general overview of the DAC8574 evaluation module (EVM), and describes some of the factors that must be considered in using this module. Topic Page Features ........... . . -
Page 10: Features
Features 1.1 Features This EVM features the DAC8574 digital-to-analog converter (DAC). The DAC8574 EVM is a simple evaluation module designed for a quick and easy way to evaluate the functionality and performance of the high resolution, quad-channel, and serial I C... -
Page 11: Reference Voltage
DAC8574, U1, device under test. 1.3 EVM Basic Functions The DAC8574 EVM is designed primarily as a functional evaluation platform to test certain functional characteristics of the DAC8574 DAC. Functional evaluation of the DAC device can be accomplished with the use of any microprocessor, TI DSP, or some sort of a waveform generator. -
Page 12: Evm Block Diagram
EVM Basic Functions A block diagram of the EVM is shown in Figure 1 - 1. Figure 1 - 1. EVM Block Diagram (J1) (J5) 3.3 VA (J6) (P6) 5 VA External Reference Module (J2) (P2) DAC Out (J4) DAC Module Module (P4) 4 CH... -
Page 13: Pcb Design And Performance
Chapter 2 PCB Design and Performance This chapter describes the layout design of the PCB, thereby, describing the physical and mechanical characteristics of the EVM. This section also shows the resulting performance of the EVM, which can be compared to the device specification listed in the data sheet. -
Page 14: Pcb Layout
PCB Layout 2.1 PCB Layout The DAC8574 EVM is designed to preserve the performance quality of the DAC, device under test, as specified in the data sheet. Carefully analyzing the EVM’s physical restrictions and the given or known elements that contributes to the EVM’s performance degradation is the key to a successful design... -
Page 15: Top Silkscreen
PCB Layout Figure 2 - 1. Top Silkscreen Figure 2 - 2. Layer 1 (Top Signal Plane) Figure 2 - 3. Layer 2 (Ground Plane) PCB Design and Performance... -
Page 16: Bottom Silkscreen
PCB Layout Figure 2 - 4. Layer 3 (Power Plane) Figure 2 - 5. Layer 4 (Bottom Signal Plane) Figure 2 - 6. Bottom Silkscreen... -
Page 17: Drill Drawing
PCB Layout Figure 2 - 7. Drill Drawing PCB Design and Performance... -
Page 18: Evm Performance
INL and DNL results and is shown in Figure 2 - 9. The parameters and results of the DAC8574 EVM characterization test can be seen in Figure 2 - 8. -
Page 19: Inl And Dnl Characterization Graph Of Dac A
EVM Performance Figure 2 - 9. INL and DNL Characterization Graph of DAC A PCB Design and Performance... -
Page 20: Inl And Dnl Characterization Graph Of Dac B
EVM Performance Figure 2 - 10. INL and DNL Characterization Graph of DAC B... -
Page 21: Inl And Dnl Characterization Graph Of Dac C
EVM Performance Figure 2 - 11. INL and DNL Characterization Graph of DAC C PCB Design and Performance... -
Page 22: Inl And Dnl Characterization Graph Of Dac D
EVM Performance Figure 2 - 12. INL and DNL Characterization Graph of DAC D 2-10... -
Page 23: Bill Of Materials
Samtec TSM-110-01-S-DV-M 10X2X.1, 20 pin 0.025”sq SMT socket J1 J5 On-Shore ED555/3DS 3-Pin terminal connector Technology Texas Instruments DAC8574IPW 16 Bit, quad voltage output, serial input I C DAC, TSSOP-16 Texas Instruments OPA627AU 8-SOP(D) precision op amp Texas Instruments REF02AU... - Page 24 2-12...
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Page 25: Evm Operation
DAC and how to interface the EVM to a specific host processor. Refer to the DAC8574 data sheet (SLAS377A), for information about its serial interface and other related topics. The EVM board is factory tested and configured to operate in the bipolar output mode. -
Page 26: Factory Default Setting
The DAC8574 interfaces with any host processor capable of handling I protocols or the popular TI DSP. For more information regarding the DAC8574 data interface, refer to the data sheet (SLAS377A). -
Page 27: Evm Stacking
D) is routed to J4 - 16. In order to allow exclusive control of each EVM that are stacked together, each DAC8574 EVM must have its own unique I C address. This is accomplished by configuring the address jumpers W7 through W10 (refer to the data sheet for I C addressing). -
Page 28: Unity Gain Output
Unity Gain Output The buffered output configuration can be used to prevent loading the DAC8574, though it may present some slight distortion because of the feedback resistor and capacitor. Users can tailor the feedback circuit to closely match their desired wave shape by simply desoldering R7 and C11 and replacing it with the desired values. -
Page 29: Optional Signal Conditioning Op-Amp (U8B)
Optional Signal Conditioning Op-Amp (U8B) In unity gain, the OPA627 op-amp, U2, performs very well with very large capacitive loads. Increasing the gain enhances the amplifier’s ability to drive even more capacitance, and adding a load resistor would even improve the capacitive load drive capability. -
Page 30: Jumper Setting
Routes the user supplied negative reference from TP2 or J4 - 18 to the V L input of the DAC8574. This voltage should be within the range of 0V to V A0 pin is set high through pullup resistor, R4. A0 can be driven by GPIO5. -
Page 31: Schematic
Schematic Jumper Reference Function Setting Routes V C to J4 - 6. Routes V C to J4 - 14. Routes V D to J4 - 8. Routes V D to J4 - 16. Disconnects the inverting input of the output op amp, U2, from AGND. Connects the inverting input of the output op amp, U2, to AGND for gain of 2. - Page 32 Revision History +5VA +3.3VA ECN Number Approved AVDD 0.1µF 10µF 10µF 0.1µF GPIO0 (LDAC) 1µF GPIO1 (A3) AVDD IO_V/DVDD U2_+IN GPIO2 OUT_A1 (EN) U2_OUT VrefH VrefH OUT_A GPIO3 (A2) A3/LDAC VOUT U2_-IN Op Amp OUT_A2 A2/EN VrefL VrefL GPIO4 OUT_B1 (A1) GPIO5 OUT_B...
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