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參數(shù)資料
| 型號： | 9042RPFK |
| 廠商： | MAXWELL TECHNOLOGIES |
| 元件分類： | ADC |
| 英文描述： | 12-Bit, 41 MSPS A/D Converter |
| 中文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, DFP28 |
| 封裝： | LDFP-28 |
| 文件頁數(shù)： | 18/26頁 |
| 文件大?。?/td> | 396K |
| 代理商： | 9042RPFK |
M
18
All data sheets are subject to change without notice
2005 Maxwell Technologies
All rights reserved.
12-Bit, 41 MSPS A/D Converter
9042
01.07.05 REV 7
Figure 21. Raise Logic Threshold for Encode
While the single-ended encode will work well for many applications, driving the encode differentially will provide
increased performance. Depending on circuit layout and systemnoise, a 1 dB to 3 dB improvement in SNR can be
realized. It is not recommended that differential TTL logic be used however, because most TTL famlies that support
complementary outputs are not delay or slew rate matched. Instead, it is recommended that the encode signal be ac-
coupled into the ENCODE and ENCODE pins.
The simplest option is shown below The low jitter TTL signal is coupled with a limting resistor, typically 100 ohms, to
the primary side of an RF transformer (these transformers are inexpensive and readily available; part#in Figure 22 is
fromMni-Circuits). The secondary side is connected to the ENCODE and ENCODE pins of the converter. Since both
encode inputs are self biased, no additional components are required.
Figure 22. TTL Source – Differential Encode
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