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N

August 2000

Rev 1

Evaluation Board Instruction Manual

ADC14071
14-Bit, 7 MSPS, 390mW Analog-to-Digital Converter

© 1999 National Semiconductor Corporation

http://www.national.com

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Содержание ADC14071

Страница 1: ...N August 2000 Rev 1 Evaluation Board Instruction Manual ADC14071 14 Bit 7 MSPS 390mW Analog to Digital Converter 1999 National Semiconductor Corporation http www national com ...

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Страница 3: ...2 5 Jumper Information 8 4 2 6 Troubleshooting 8 5 0 Exploring the Waveform 9 5 1 Signal Purity 9 5 1 1 Evaluating a Sine Wave 9 5 1 2 Low Frequency Triangle Wave Input 9 5 1 2 1 Monotonicity and Uncertainty 9 5 1 2 2 Rising Falling Symmetry 10 5 2 The FFT Plot 10 5 2 1 Dynamic Performance Estimates 10 5 2 2 Bandwidth Estimation 10 6 0 Computer Board Communications 10 7 0 Circuit Description and H...

Страница 4: ... Blank 4 http www national com ...

Страница 5: ...4071 be sure to use Version 2 1 or later of the ADC16061 EXE software with the ADC14071 choice in the Configuration Menu 3 0 Functional Description Figure 7 shows the block diagram of the ADC14071 evaluation board while Figures 8 and 9 show the board schematic U4 is the ADC14071 under test 2 0 Quick Start 3 1 Input signal conditioning 1 Unless the ADC14071 Evaluation Board has been pre assembled i...

Страница 6: ...ow LED D6 indicates the status of board PC communications The board is sending data to the computer when this LED is on 3 7 Power requirements Power is supplied to this board through power connector P2 at the top right of the board The board requires 1 Amp at 12V to 15V and 10mA at 12V to 15V The board is protected from accidental polarity reversal with series diodes in both the positive and negat...

Страница 7: ... on your computer 8 When transfer is complete the data window should show many sine waves The display may show a nearly solid area of red which is O K 4 Be sure a 14MHz 14 31818MHz is fine clock oscillator Y1 is in place or connect an external clock source to BNC J2 at the lower right corner of the board Figure 2 The WaveVision captured display of a 1MHz sine wave at 7MSPS The input signal should ...

Страница 8: ...ber of samples taken SS the signal input frequency fin and the sample rate fs for coherent sampling is Be sure that a jumper is present on J4 Ascertain that a 14MHz clock oscillator is properly inserted into the socket at Y1 or that a TTL level clock signal is present at J2 Check to see that LED D5 is on Be sure cable connections are solid Be sure that the board to computer cable is one with all w...

Страница 9: ...or WaveVision screen drawings of software operation You may select a small portion of the waveform by clicking and dragging across it 5 1 Signal Purity 5 1 2 Low Frequency Triangle Wave Input A low frequency about 1KHz triangle wave will provide general information on ADC performance If you are looking for triangle wave symmetry compare the ADC output symmetry with that of the generator output Man...

Страница 10: ...y and is stable Note that this board allows selection of a transformer or operational amplifiers for single ended to differential conversion of the input signal to drive the ADC14071 Because the transformer is a high frequency one and not designed for low frequency operation we recomment that the transformer be used only for input frequencies above 500kHz 5 2 1 Dynamic Performance Estimates The dy...

Страница 11: ... to Computer Parallel Port Controller Memory Power Suply Input Reference and Test Device Figure 8 Analog Input Reference Ref Adj 14 ADC Clock ADC14071 Single Ended to Differential Figure 7 Block Diagram of the ADC14071 Evaluation Board 11 http www national com ...

Страница 12: ...k 5 R14 5k 5 R13 2 4k R4 2 4k R2 5k 5 R3 5k 5 R9 5k 5 T1 R23 33 D5 CLOCK U4 RP1 RP2 Q1 MMBT2222A R12 5 11k 5 C27 0 1 JP1 INPUT SELECT JP2 DRV SELECT JP3 DRV SELECT J1 ANALOG IN C19 0 1uF 5V A TP2 OUT OF RANGE A C11 0 1uF TP11 Sig In 3 2 1 3 2 1 3 2 1 U1A LM6172 U2B LM6172 R6 10 A A C105 0 1uF A R108 499 5 C101 10uF A C9 0 1uF A TP1 V REF E4 E5 E6 D D D D LD1 LD0 R110 10k R109 10k R105 47 A C23 10u...

Страница 13: ...23 73 74 79 75 62 46 RA15 RA14 RA13 RA12 RA11 RA10 RA9 RA8 RA7 RA6 RA5 RA4 RA3 RA2 RA1 RA0 WR RD P7 P6 P5 P4 P3 P2 P1 P0 BUSY AUTOFD RAMM7 RAMM6 RAMM5 RAMM4 RAMM3 RAMM2 RAMM1 RAMM0 RAML7 RAML6 RAML5 RAML4 RAML3 RAML2 RAML1 RAML0 18 19 20 21 24 25 26 27 42 43 44 1 2 3 4 5 17 41 6 39 40 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 NC NC NC 38 37 36 35 32 31 30 29 16 15 14 13 10 9 8 7 28 23 ...

Страница 14: ...06 26 2 R4 R13 2 4k Type 1206 27 2 R6 R19 10 Type 1206 28 1 R9 5k 1 Type 1206 29 2 R12 R10 5 11k 1 Type 1206 30 3 R11 R20 R28 470 Type 1206 31 1 R21 464 1 Type 1206 32 2 R22 R23 33 Type 1206 33 2 R24 R48 200 Type 1206 34 5 R25 R27 R42 R109 R110 10k Type 1206 35 2 R26 R31 100 Type 1206 36 4 R32 R35 R36 R41 330 Type 1206 37 4 R33 R34 R101 R107 1k Type 1206 38 1 R37 10 10W DigiKey ALSR1J 12 ND 39 10 ...

Страница 15: ... one data point per line To save a binary file for use later by WaveVision you can click on the Save icon enter ALT F S or enter CTRL S You will be prompted for a file name the first time you save a given set of data 10 0 Evaluation Board Specifications To save a file that has already been saved but to save it under a different file tame enter ALT F A You will be prompted to enter the new file nam...

Страница 16: ... as ALT F S or CTRL S Open File same as ALT F O or CTRL O New same as ALT F N or CTRL N CON FIG ADC14071 WaveVision Menu ADC14061 ADC14161 ADC14071 ADC16061 WaveVision Sample 1 For Help pres s F 1 File E dit View Prodecure Options Window Help Copy Graph Ctrl C About WaveVision New Input T ile Cascade Arrange Icons 1 No Data Zoom F ull R t Click Zoom Area Lft Click Drag Display Dbl Click New Ctrl N...

Страница 17: ...es 14 318 2 ADC Actions Calibrate Reset Power Down Disable Output ADC16061 ADC14061 ADC14161 ADC14071 ADC Part Number Parallel Port Time Out Error The evaluation board should be reset ADC14061 ADC14161 ADC14071 ADC16061 WaveVision OK ADC14071 WaveVision Options Menu ADC14061 ADC14161 ADC14071 ADC16061 WaveVision Sample 1 File E dit View Prodecure Options Window Help For Help pres s F 1 Options Too...

Страница 18: ...g on the sampled data plot It allows you to set a title for the displayed waveform to set X Axis and Y Axis units and to set min and max voltage levels Title X Axis Units Bin Numbers Frequency 14318181 Sampling Rate of this data Hz FFT Data display OK Cancel This dialog box iis obtained by double clicking on the FFT plot It allows you to set a title for the FFT and to set X Axis units ADC14071 Wav...

Страница 19: ... Blank 19 http www national com ...

Страница 20: ... in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the user 2 A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system or to affect its safety or effectiveness N National Semiconductor Corporatio...

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