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PCB Layout

2-4

Figure 2 - 5. Layer 4 (Bottom Signal Plane)

Содержание DAC5571

Страница 1: ...DAC7571 DAC6571 DAC5571 DAC7574 DAC6574 DAC5574 and DAC8571 Evaluation Module February 2004 Data Acquisition User s Guide ...

Страница 2: ...e This Manual This document contains the following chapters Chapter 1 EVM Overview Chapter 2 PCB Design and Performance Chapter 3 EVM Operation Information About Cautions and Warnings This book may contain cautions and warnings This is an example of a caution statement A caution statement describes a situation that could potentially damage your software or equipment This is an example of a warning...

Страница 3: ...verter EVMs 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 datacnvapps list ti com Include in the subject heading the product you have questions or concerns with FCC Warning This equipment is intended for use in a laboratory test environment only It gen erates uses and can radiate radio freque...

Страница 4: ...s 1 4 2 PCB Design and Performance 2 1 2 1 PCB Layout 2 2 2 2 EVM Performance 2 6 2 3 Bill of Materials 2 13 3 EVM Operation 3 1 3 1 Factory Default Setting 3 2 3 2 Host Processor Interface 3 3 3 3 EVM Stacking 3 4 3 4 The Output Op Amp 3 5 3 4 1 Unity Gain Output Default Configuration 3 6 3 4 2 Output Gain of Two 3 6 3 5 Jumper Setting 3 7 3 6 Schematic 3 8 ...

Страница 5: ...ization Graph of DAC7574 Channel D 2 10 2 13 DAC8571EVM Test Parameters and Results 2 11 2 14 INL and DNL Characterization Graph of DAC8571 2 12 Tables 1 1 Featured DAC Selections 1 2 2 1 Parts List 2 13 3 1 DACx574EVM Factory Default Jumper Setting 3 2 3 2 DACx571EVM Factory Default Jumper Setting 3 2 3 3 DAC8571EVM Factory Default Jumper Setting 3 3 3 4 DACx571 Output Channel Mapping 3 4 3 5 DAC...

Страница 6: ...itute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction i...

Страница 7: ...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 ...

Страница 8: ... If there is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 100 C The EVM is designed to operate properly with certain components above 100 C as long as the input and output ranges are maintained These components include but are not limited to linear regulators switching trans...

Страница 9: ...des an overview of the DAC7574 DAC6574 DAC5574 DAC7571 DAC6571 DAC5571 and DAC8571 evaluation module EVM and instructions on setting up and using this module Topic Page 1 1 Features 1 2 1 2 Power Requirements 1 2 1 3 EVM Basic Functions 1 4 Chapter 1 ...

Страница 10: ...571 DAC5571 and DAC8571 digital to analog converter DAC It provides a quick and easy way to evaluate the functionality and performance of the high resolution as well as the low resolution I2C input DACs Although the EVM supports seven DAC types only the selected DAC and its associated ...

Страница 11: ...tion of this EVM are as follows the VCC and VSS supplies typically 15 V can range from 4 5 V to 18 V VCC and VSS connect through J1 3 and J1 1 respectively or through J6 1 and J6 2 terminals 5 VA connects through J5 3 or J6 3 and 3 3 VA connects through J6 8 All of the analog power supplies are referenced to analog ground through J1 2 and J6 6 terminals The analog power supply for the device under...

Страница 12: ...n point for an alternative external reference source if desired In this configuration the jumper on TP9 must be removed and TP8 must be shorted The external voltage reference must not exceed 5 V The REF02 circuit also provides an alternative adjustable analog supply for U1 U4 and U8 whichever is installed on the EVM through W1 pin 1 if desired It also provides both reference and supply voltages fo...

Страница 13: ...AC outputs can be monitored through selected pins of J4 The outputs of U1 can be switched using their respective jumpers W2 W11 W12 and W13 for stacking while U4 or U8 uses only W2 Stacking allows a total of eight DAC channels if two DACx574 EVMs are stacked or two DAC channels if two DACx571 EVM are stacked to be used provided that the I2C address is unique for each stacked EVM board Any DAC outp...

Страница 14: ...1 6 ...

Страница 15: ...2 1 PCB Design and Performance PCB Design and Performance This chapter describes the physical and mechanical characteristics of the ...

Страница 16: ...olid planes are not possible a split plane is usually adequate When considering a split plane design analyze the component placement and carefully divide the board into its analog and digital sections starting from the device under test The ground plane plays an important role in controlling the noise and other effects that contribute to DAC output errors To ensure that return currents are handled...

Страница 17: ...PCB Layout 2 3 PCB Design and Performance Figure 2 2 Layer 1 Top Signal Plane ...

Страница 18: ...PCB Layout 2 4 Figure 2 5 Layer 4 Bottom Signal Plane ...

Страница 19: ......

Страница 20: ...ad This process is repeated for all codes to generate the measurements for INL and DNL The parameters and results of the DAC EVM characterization test for the DAC7574 are shown in Figures 2 8 through 2 12 Test parameters and results for the DAC8571 are shown in Figures 2 13 and 2 14 The characterization test data for the DAC7571 DAC6574 DAC6571 DAC5574 and DAC5571 are not shown it is assumed that ...

Страница 21: ...EVM Performance 2 7 PCB Design and Performance Figure 2 9 INL and DNL Characterization Graph of DAC7574 Channel A ...

Страница 22: ...EVM Performance 2 8 Figure 2 10 INL and DNL Characterization Graph of DAC7574 Channel B ...

Страница 23: ...EVM Performance 2 9 PCB Design and Performance Figure 2 11 INL and DNL Characterization Graph of DAC7574 Channel C ...

Страница 24: ...EVM Performance 2 10 Figure 2 12 INL and DNL Characterization Graph of DAC7574 Channel D ...

Страница 25: ...EVM Performance 2 11 PCB Design and Performance Figure 2 13 DAC8571EVM Test Parameters and Results ...

Страница 26: ...EVM Performance 2 12 Figure 2 14 INL and DNL Characterization Graph of DAC8571 ...

Страница 27: ...Bill of Materials ...

Страница 28: ...2 14 ...

Страница 29: ...he Related Documentation from Texas Instruments section in the Preface of this user s guide for more in formation about the DAC serial interface and other related topics The EVM board is factory configured to operate in the unipolar output mode Topic Page 3 1 Factory Default Setting 3 2 3 2 Host Processor Interface 3 3 3 3 EVM Stacking 3 4 3 4 The Output Op Amp 3 5 3 5 Jumper Setting 3 7 3 6 Schem...

Страница 30: ...rd is factory configured to operate in unipolar 5 V output mode Table 3 1 DAC7574 DAC6574 DAC5574 EVM Factory Default Jumper Setting DAC7574 DAC6574 DAC5574 EVM CONFIGURATION Reference Jumper Position Function W1 2 3 Power supply for U1 is 5 VA W2 1 2 DAC output A VOUT ...

Страница 31: ...2 Host Processor Interface Because the host processor controls the DAC proper operation depends on the correct interface of the host processor and the EVM board Properly written code is also required to operate the DAC A host platform specific cable assembly connects the EVM to the host processor through J2 for the I2C serial control and data signals The output is monitored through J4 An interface...

Страница 32: ...8 output VOUT is routed to J4 2 2 3 U8 output VOUT is routed to J4 10 Table 3 5 DAC8571 Output Channel Mapping Reference Jumper Position Function W2 1 2 U4 output VOUT is routed to J4 2 2 3 U4 output VOUT is routed to J4 10 Table 3 6 DAC7574 DAC6574 DAC5574 Output Channel Mapping Reference Jumper Position Function W2 1 2 U1 output A VOUTA is routed to J4 2 2 3 U1 output A VOUTA is routed to J4 10 ...

Страница 33: ...The Output Op Amp 3 5 EVM Operation Table 3 7 DAC7574 DAC6574 DAC5574 I2C Slave Address Map Factory Set I2C Address W7 W8 R W I2C Address and Function ...

Страница 34: ...acing them with the desired values R7 can be replaced with a zero ohm resistor and C11 can be left open if desired Table 3 10 shows the jumper settings for the unity gain configuration of the output buffer in unipolar or bipolar supply mode Table 3 10 Unity Gain Output Jumper Settings Reference Jumper Setting Function Reference Unipolar Bipolar Function W3 Open Open Disconnects TP2 input or AGND f...

Страница 35: ...M Operation 3 5 Jumper Setting Table 3 12 shows the function of each specific jumper setting of the EVM Table 3 12 Jumper Setting Function Reference Jumper Setting Function W1 1 3 5 V analog supply is selected for AVDD W1 1 ...

Страница 36: ...in is connected to its VOUT pin W11 1 3 Routes VOUTB to J4 4 W11 1 3 Routes VOUTB to J4 12 W12 1 3 Routes VOUTC to J4 6 W12 1 3 Routes VOUTC to J4 14 W13 1 3 Routes VOUTD to J4 8 W13 1 3 Routes VOUTD to J4 16 W14 1 3 Connects 3 3 VD to VDD for digital supply 847 4624 64 463 861eW 344 8069 261 490 62 l92 208 l146 438 l4 ...

Страница 37: ...Schematic 3 9 EVM Operation 3 6 Schematic The schematic diagram follows this page ...

Страница 38: ... ti 12500 TI Boulevard Dallas Texas 75243 Title SHEET OF FILE SIZE DATE REV 12 Feb 2004 Drawn By Engineer Revision History REV ECN Number Approved DAC7574 Rev A Sch DOCUMENTCONTROL C1 0 1µF 5VA SCLK R6 10K VSS 2 3 6 4 7 1 5 U2 Op Amp VCC C10 ...

Страница 39: ...tute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual property of the third party or a license from TI under the patents or other intellectual property of TI Reproduction of information in TI data books or data sheets is permissible only if reproduction is...

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