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August 2005
Rev F
National Semiconductor
Evaluation Board Instruction Manual
ADC12040 12-Bit, 40 Msps, 5 Volt, 380 mW A/D Converter
ADC12010 12-Bit, 10 Msps, 5 Volt, 160 mW A/D Converter
ADC12020 12-Bit, 20 Msps, 5 Volt, 185 mW A/D Converter
ADC12L063 12-Bit, 62 Msps, 3.3 Volt 354 mW A/D Converter
© 2001, 2002, 2003, 2004 National Semiconductor Corporation.
1 http://www.national.com
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Table of Contents 1.0 Introduction.............................................................................................................................3 2.0 Board Assembly .....................................................................................................................3 3.0 Quick Start..............................................................................................................................4 4.0 Functional Description................................
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In the Computer mode evaluation is simplified by 1.0 Introduction connecting the board to the WaveVision Digital Interface These Design Kits (each consisting of an Evaluation Board (order number WAVEVSN BRD 3.0), which is Board, National's WaveVision software and this manual) connected to a personal computer through a serial is designed to ease evaluation and design-in of Nationals communication port and running WaveVision software, ADC12040, ADC12010, ADC12020, or ADC12L063 12- operating under
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2. Perform steps 2 and 3 of stand alone quick start,, 3.0 Quick Start above. Note: To develop the ADC clock, the Digital Interface 3. Use of the crystal oscillator located at Y1 is Board divides its on-board clock. In doing so, jitter is recommended to clock the ADC. To do so, connect introduced to the ADC clock which degrades the the jumper at JP2 to pins 2 and 3. This is the default observed performance of the ADC12040. See Section position. The ADC clock signal may be monitored at 6.0 Obtaini
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4.1.2 Dual Input must be the same as that provided from the Digital Interface Board. To look at intermodulation performance, moving shorting jumpers of JP3 and JP4 to pins 2 and 3 of JP3. Connect See Section 6.1 for information on capturing data with a different signals to J1 and J3 from 50-Ohm sources. clock that is not synchronized to the clock of the Digital When looking at the ADC output with two different signals Interface Board. at the input, the dynamic performance parameters (SNR, SINAD,
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an appropriate bandpass filter as even the best signal ADC12010 evaluation board, a 20 MHz oscillator for generator available can not produce a signal pure enough the ADC12020 evaluation board, or a 60 MHz on the to evaluate the dynamic performance of an ADC. ADC12L063 evaluation board). 3. Connect the jumper at JP2 to pins 2 and 3 (default If this board is used in conjunction with the Digital position). This selects the crystal oscillator located Interface Board and WaveVision software, a cable
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Figure 4 Marginal data capture that results from trying to If your data capture results in something similar to what is capture data that is near but not right at the point where the shown here in Figure 3 or in Figure 4, take another ADC outputs are in transition. sample. It may take a few trials to get good data. Figure 5. Normal data capture. Coherent sampling of a periodic waveform occurs when a Figure 3. Poor data capture resulting from trying to capture data while the ADC outputs are in
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8.0 Hardware Schematic A1 B1 C1 A2 B2 C2 A3 B3 C3 A4 B4 C4 A5 B5 C5 A6 B6 C6 A7 B7 C7 A8 B8 C8 A9 B9 C9 A10 B10 C10 A11 B11 C11 A12 B12 C12 A13 B13 C13 A14 B14 C14 A15 B15 C15 A16 D0 B16 D1 C16 A17 D2 B17 D3 C17 A18 D4 B18 D5 C18 A19 D6 B19 D7 C19 A20 D8 B20 D9 C20 A21 D10 B21 D11 C21 A22 B22 C22 A23 B23 C23 A24 B24 C24 A25 B25 C25 A26 B26 C26 A27 B27 C27 A28 B28 C28 A29 B29 C29 A30 B30 C30 A31 B31 C31 A32 B32 C32 8 http://www.national.com D6 1N5227 (3.6V) R1 +V Q1 330 MMB
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9.0 Evaluation Board Bill of Materials Item Qty Reference Part Source 1 7 C1, C3, C6, C9, C10, C11, C12 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 D15 8 1 D1 RED LED DigiKey # 160-1124-ND 9 2 D2, D3 1N4001 Various 10 1 D5 LM4041BIZ-2.5 National Semiconductor 11 1 D6 1N5227 (Not used for the ADC12L063) Vario
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APPENDIX A1.0 Operating in the Computer Mode The ADC12040 Evaluation Board is compatible with the WaveVision Digital Interface Board and WaveVision software. When connected to the Digital Interface Board, data capture is easily controlled from a personal computer operating in the Windows environment. The data samples that are captured can be observed on the PC video monitor in the time and frequency domains. The FFT analysis of the captured data yields insight into system noise and distortion so
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JP4 Jumper - ADC Input Select Connect 1-2 Select input J1 only Connect 2-3 Select mixed J1 & J3 Inputs (must also have JP3 pins 2 & 3 shorted) J2 Connector - ADC Data Outputs - Connection to WaveVision 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 ADC output D5 C18 ADC output D6 B19 ADC output D7 C19 ADC output D8 B20 ADC output D9 C20 ADC output D10 B21 ADC output D11 C21 GND A1 thru A24, A28, B28, C28, A31
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BY USING THIS PRODUCT, YOU ARE AGREEING TO BE BOUND BY THE TERMS AND CONDITIONS OF NATIONAL SEMICONDUCTOR'S END USER LICENSE AGREEMENT. DO NOT USE THIS PRODUCT UNTIL YOU HAVE READ AND AGREED TO THE TERMS AND CONDITIONS OF THAT AGREEMENT. IF YOU DO NOT AGREE WITH THEM, CONTACT THE VENDOR WITHIN TEN (10) DAYS OF RECEIPT FOR INSTRUCTIONS ON RETURN OF THE UNUSED PRODUCT FOR A REFUND OF THE PURCHASE PRICE PAID, IF ANY. The ADC12040/ADC12010/ADC12020/ADC12L063 Evaluation Boards are intended for produc
