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Table of contents for the manual
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Page 1
National Semiconductor August 2005 Rev F Evaluation Board Instructio n Manual A DC 12040 12-Bit, 40 M sps, 5 Volt, 380 mW A/D Con verter A DC 12010 12-Bit, 10 M sps, 5 Volt, 160 mW A/D Con verter A DC 12020 12-Bit, 20 M sps, 5 Volt, 185 mW A/D Con verter A DC 12L063 12-Bit, 62 M sps, 3.3 Volt 354 mW A/D Co nverter © 2001 , 2002, 2003, 2004 Nationa[...]
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Table of Con tents 1.0 Introduction...................................................... ............................. ............................. .............3 2.0 Board Assembly ............................. ............................. ............................ ............................. ..3 3.0 Quick Start............................[...]
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1.0 Introductio n In the Computer mode evaluation is sim plified by connecting the board to the W aveVision Digital Interface Board (order num ber W AV EVSN BRD 3.0), which is connected to a personal computer t hrough a serial comm unication po rt and running WaveVision software, operating under Microsoft W indows. Or use W AVEVSN BRD 4.0 when avai[...]
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3.0 Quick Start 2. Perform steps 2 and 3 of stand alone quick start,, above. Note: To dev elop the ADC clock, the Digital Interface Board d ivides its on-board clock . In doing so, jitter is introduced t o the ADC clock which degrades the observed pe rformance of the ADC12040 . See Section 6.0 Obtaining Best Results for an expla nation of this phen[...]
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4.1.2 Dual Input must be t he s ame as that provided f rom the Digital Interface Board. To look at intermodulation performance, moving shorting jumpers of J P3 and JP4 to pins 2 and 3 of JP3. Connect different s ignals t o J 1 and J3 from 50-Ohm sources. W hen looking at the ADC output with two different signals at the input, the dynamic performanc[...]
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an appropriate bandpass f ilter as even the best signal generator av ailable can not produce a signal pure enough to evaluate the dynamic performance of an ADC. ADC12010 evaluation board, a 20 MHz oscillator for the ADC12020 evalu ation board, or a 60 MHz on t he ADC12L063 ev aluation board). 3. Connect the jum per at JP2 t o pins 2 and 3 (default [...]
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If your data capture results in som ething similar to wh at is shown here in Fi gure 3 or in Figure 4 , take another sample. I t may take a f ew trials to get good data. Figure 4 Marginal da ta capture that resu lts from try ing to capture data that is near but not right at the point where the ADC outputs are in transition. Figure 5. No rmal data c[...]
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8.0 Hardw are Schematic Figure 6. ADC 12040 Evaluation Board Schematic +V D2 1N4001 D3 1N4001 + C14 33uF + C16 33uF D4 1N4001 C18 + 33u F TP8 +V TP9 +5V TP10 -V +5V -V P1 Power Conne c tor +V GND +5V -V 1 2 3 4 L3 CHOKE L4 CHOKE L5 CHOKE λ 1 2 4 3 OSC VR1 1k C3 1uF TP1 VREF TP3 Vin+ TP4 Vin- R7 33 (47pF) R8 33 (47pF) C7 22pF (330pF) C2 0.1uF C4 0.[...]
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9.0 Evaluation Boa rd Bill of Materials Item Qty Reference Part Source 1 7 C 1, C3 , C6 , C9 , C 1 0, C1 1, C 12 1 uF Type 1206 2 6 C2, C4, C5, C8, C15, C17 0.1 uF Type 1206 3 1 C7 22 pF (330 pF for ADC12010 / 12020 ) Type 1206 4 1 C13 22 pF Type 1206 5 2 C14, C16 33 uF, 6.3V Type 7343 (D Size) 6 - C18 not populated n/a 7 - C15A is diode D15 see D1[...]
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APPENDIX A1.0 Operating in the Com puter Mode The ADC12040 Evaluation Board is com patible with t he W aveVision Digital Interface Board and W aveVision software. W hen connected to the Digital Interface B oard, data capture is easi ly controlled from a personal computer operating in the W indows environment. The data sam ples that are captured can[...]
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JP4 Jumper - ADC Input Select Connect 1-2 S elect input J1 only Connect 2-3 S elect mixed J1 & J3 I nputs (must als o have JP3 pins 2 & 3 shorted) J2 Connector - ADC Data Outputs - Connection to WaveVisio n Digital Interface Board Signal J2 pin number ADC output D0 B16 ADC output D1 C16 ADC output D2 B17 ADC output D3 C17 ADC output D4 B18 [...]
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BY USING THIS PRODUCT , YOU A RE A GREEING TO BE BOUND BY THE TERMS A ND CONDITIONS OF NA TIONA L S EMICONDUCTOR 'S END USER LICENSE A GREEM ENT. DO NOT USE THIS PRODUCT UNTIL YOU HA VE REA D A ND A GREED TO THE TERMS A ND CONDITIONS OF THA T A GREEM ENT. IF YOU DO NOT A GREE WI TH THEM, CONTA CT THE VENDOR W ITHIN TEN (10) DA YS OF RECEIPT FO[...]