Analog Devices EVAL-AD5781 Скачать руководство пользователя страница 10 | Manualshive

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UG-184

Evaluation Board User Guide

Rev. 0 | Page 10 of 16

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Figure 10. Schematic of the Voltage Reference Scaling Circuitry

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Содержание EVAL-AD5781

Страница 1: ...rolled by two means via the on board connector J6 or via the system development platform connector J3 The SDP board allows the evaluation board to be controlled through the USB port of a Windows XP SP2 or later or Vista 32 bit based PC using the AD5781 evaluation software DEVICE DESCRIPTION The AD5781 is a high precision 18 bit digital to analog con verter DAC designed to meet the requirements of ...

Страница 2: ...am 1 Revision History 2 Evaluation Board Hardware 3 Power Supplies 3 Link Options 3 On Board Connectors 3 Evaluation Board Software 5 Software Installation 5 Software Operation 5 Main Window 6 Evaluation Board Performance 8 Evaluation Board Schematics and Artwork 9 Ordering Information 15 Bill of Materials 15 REVISION HISTORY 8 10 Revision 0 Initial Version ...

Страница 3: ...k options on the evaluation board should be set for the required operating setup before using the board The functions of the link options are described in Table 5 Default Link Option Setup The default link options are listed in Table 1 Table 1 Default Link Options Link No Option LK1 A LK3 A LK4 Removed LK5 Removed LK6 Removed LK8 A LK9 C Connector J6 Pin Descriptions Table 2 Connector J6 Pin Confi...

Страница 4: ... at logic high LK5 This link selects the state of the CLR pin When this link is inserted CLR is at logic low When this link is removed CLR is at logic high LK6 This link selects the state of the RESET pin When this link is inserted RESET is at logic low When this link is removed RESET is at logic high LK8 This link selects the positive reference source Position A selects an on board generated 10 V...

Страница 5: ...the USB port of the PC to ensure that the evaluation system is correctly recognized when connected to the PC 2 If the evaluation system is not connected to the USB port when the software is launched a connectivity error is displayed see Figure 2 Connect the evaluation board to the USB port of the PC wait a number of seconds and click Rescan Follow the instructions 1 After installation from the CD ...

Страница 6: ...tware programming the DAC with the Start Code value incrementing the programmed value at each step by the Code Step value and finishing when the programmed value reaches the Stop Code value A delay between measure ments can be inserted if required The GPIB address of the multimeter must be specified To begin the measurement click the START button The measurement can be halted at anytime by clickin...

Страница 7: ...Evaluation Board User Guide UG 184 Rev 0 Page 7 of 16 09092 005 Figure 6 Measure DAC Output Window ...

Страница 8: ...wered from VDD 15 V VSS 15 V and VREF 5 V 0 5 0 4 0 3 0 2 0 1 0 4 0 3 0 2 0 1 0 0 5 0 50k 100k 150k 200k 250k INL ERROR LSB DAC CODE 09092 007 Figure 7 INL Error vs DAC Code 0 50 0 45 0 40 0 35 0 30 0 25 0 20 0 15 0 10 0 05 0 0 05 0 10 0 15 0 20 0 25 0 30 0 50 0 45 0 40 0 35 0 20k 40k 60k 80k 100k 120k 140k 160k 180k 200k 220k 240k 262 143 DNL ERROR LSBs DAC CODE 09092 008 Figure 8 DNL Error vs DA...

Страница 9: ...Evaluation Board User Guide UG 184 Rev 0 Page 9 of 16 EVALUATION BOARD SCHEMATICS AND ARTWORK 09092 009 Figure 9 Schematic of the AD5781 Circuitry ...

Страница 10: ...UG 184 Evaluation Board User Guide Rev 0 Page 10 of 16 09092 010 Figure 10 Schematic of the Voltage Reference Scaling Circuitry ...

Страница 11: ...Evaluation Board User Guide UG 184 Rev 0 Page 11 of 16 09092 011 Figure 11 Schematic of the SDP Board Connector ...

Страница 12: ...UG 184 Evaluation Board User Guide Rev 0 Page 12 of 16 09092 012 Figure 12 Component Placement Schematic 09092 013 Figure 13 Top PCB Layer Schematic ...

Страница 13: ...Evaluation Board User Guide UG 184 Rev 0 Page 13 of 16 09092 014 Figure 14 Inner First PCB Layer Schematic 09092 015 Figure 15 Inner Second PCB Layer Schematic ...

Страница 14: ...UG 184 Evaluation Board User Guide Rev 0 Page 14 of 16 09092 016 Figure 16 Bottom PCB Layer Schematic ...

Страница 15: ... 1022248 and FEC 150410 LK4 LK5 LK6 2 pin 0 1 pitch header and shorting shunt M20 9990246 and M7566 05 FEC 1022247 and FEC 150 411 LK8 LK9 4 pin 2 2 0 1 header and shorting shunt M20 9983646 and M7566 05 FEC 1022244 and 150 411 36 pin strip R1 R2 R3 R4 R5 R6 R7 SMD resistor 0 Ω MC 0 063W 0603 0R FEC 9331662 R8 SMD resistor 1 5 kΩ MC 0 1W 0805 5 1K5 FEC 9333924 R15 R16 R17 R18 SMD resistor 10 kΩ MC...

Страница 16: ...er party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Customer may not disassemble decompile or reverse engineer chips on the Evaluation Board Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Bo...

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