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Summary of Contents for Texas Instruments DAC8534
- Page 1 DAC8534 Evaluation Module User’s Guide June 2003 Data Acqusition-Digital/Analog Converters SLAU107...
- 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 DAC8534 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 Trademarks The TI Logo is a trademark of Texas Instruments. SPI and QSPI are trademarks of Motorola, Inc.
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Page 7: Table Of Contents
Contents Contents EVM Overview ..............Features . - Page 8 Contents Figures 1 - 1 EVM Block Diagram ............2 - 1 Top Silkscreen .
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Page 9: Evm Overview
Chapter 1 EVM Overview This chapter gives a general overview of the DAC8534 evaluation module (EVM), and describes some of the factors that must be considered in using this module. Topic Page Features ............ -
Page 10: Features
5 VA or 3.3 VA and selecting the proper position of jumper W1. This allows the DAC8534 analog section to operate from either supply power, while the I/O and digital section is powered by 5 V, V... -
Page 11: Evm Basic Functions
DAC8434, U1, device under test. 1.3 EVM Basic Functions The DAC8534 EVM is designed primarily as a functional evaluation platform to test certain functional characteristics of the DAC8534 digital-to-analog converter. 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 Figure 1 - 1. EVM Block Diagram (J1) (J5) 3.3 VA (J6) (P6) 5 VA 5 VA External 3.3 VA Reference Module (J2) (P2) DAC Out (J4) DAC Module Module (P4) LDAC 4 CH 8 CH SCLK Buffer SYNC Output... -
Page 13: Pcb Design And Performance
Chapter 2 PCB Design and Performance This chapter describes the layout design and mechanical characteristics of the PCB, as well as a brief description of the EVM test performance procedure. The EVM bill of materials is also included in this section. Topic Page PC Layout... -
Page 14: Pcb Layout
PCB Layout 2.1 PCB Layout The DAC8534EVM is designed to preserve the performance quality of the DAC device under test, as specified in the datasheet. Carefully analyzing the EVM’s physical restrictions and the given or known elements that contribute to the EVM’s performance degradation is the key to a successful design implementation. -
Page 15: Top Silkscreen
PCB Layout Figure 2 - 1. Top Silkscreen Figure 2 - 2. Layer 1 (Top Signal Plane) Figure 2 - 3. Layer Two (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: Evm Performance
EVM Performance Figure 2 - 7. Drill Drawing 2.2 EVM Performance The EVM performance test is conducted using a high density DAC bench test board, an Agilent 3458A digital multimeter, and a PC running the LABVIEW software. The EVM board is tested for all codes of 65535, and the device under test (DUT) is allowed to settle for 1ms before the meter is read. -
Page 18: 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 DAC8534IPW 16-bit, Quad voltage output, serial input DAC, TSSOP-16 Texas Instruments OPA627AU 8-SOP(D) Precision Op Amp Texas Instruments REF02AU 5 V, 8-SOP(D) precision voltage... -
Page 19: Evm Operation
DAC, and how to interface the EVM to a specific host processor. Refer to the DAC8534 data sheet (SBAS254), 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 20: Factory Default Setting
Jumper Reference Position Function 1 - 2 Analog supply for the DAC8534 is +5 V, (labeled as +5 VA). 1 - 2 DAC output A (V A) is routed to J4 - 2. OPEN H is not routed to the inverting input of the op amp for voltage offset with gain of 2 output. -
Page 21: Evm Stacking
EVM Stacking 3.3 EVM Stacking EVM stacking is possible if there is a need to evaluate two DAC8534 devices in yielding a total of eight channel outputs. A maximum of two EVMs are allowed, since the output terminal J4 dictates the number of DAC channels that can be connected without colliding. -
Page 22: Unity Gain Output
Unity Gain Output The buffered output configuration can be used to prevent loading the DAC8534, although 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 them with the desired values. -
Page 23: Optional Signal Conditioning Op Amp (U8B)
Optional Signal Conditioning Op Amp (U8B) even more capacitance, and by adding a load resistor even improves the capacitive load drive capability. Table 3 - 5. Capacitive Load Drive Ouptut Jumper Settings Jumper Setting Reference Function Unipolar Bipolar Open Open H is disconnected from the inverting input of the output op amp, U2. -
Page 24: Jumper Setting
Routes the user supplied negative reference from TP2 or J4- 18 to the V L input of the DAC8534. This voltage should be within the range of 0V to V A0 pin is set high through pull-up resistor, R4. A0 can be driven by GPIO5. - Page 25 Jumper Setting 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.
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Page 26: Schematic
Schematic 3.7 Schematic A 17”X11” schematic diagram is an attachment to this document. - Page 27 VCC = +15V Analog VDD = +2.7V to +5.0V Digital VSS = 0V to -15V Analog 12500 TI Boulevard. Dallas, Texas 75243 Title: DAC8534_74 EVM Engineer: J. PARGUIAN DOCUMENTCONTROL # 6447711 REV: Drawn By: FILE: DATE: 13-Jun-2003 SIZE: DAC8534 RevA.Sch SHEET:...
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