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參數(shù)資料
| 型號： | AN642 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Analog-to-Digital Converter Captures 1Gsps |
| 中文描述： | 模擬到數(shù)字轉(zhuǎn)換器捕捉1Gsps的 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 269K |
| 代理商： | AN642 |
www.maxim-ic.com/an642
Page 6 of 7
1GHz) make the MAX104 the converter of choice for oversampled as well as undersampled 8-bit digital
communications applications. For instance, the MAX104 delivers a 47.4dB SNR and 68.9dB SFDR at an
analog input frequency of 125MHz. The two-tone performance is an impressive -57.7dB at the same test
frequency.
Another ideal application is in DAQ instruments and systems. These are systems that are designed to
sample, analyze, and display signal waveforms detected at various nodes within a circuit under analysis
(e.g., high-speed, multichannel digital oscilloscopes). ADCs are used in the front-end circuitry of digital
sampling oscilloscopes (DSOs). Often, multiple converters are time interleaved to increase an effective
sampling frequency. Maxim's new 600Msps/1.5Gsps converter, the MAX106, provides designers with the
options of lower and even higher sampling speeds.
Important data-converter specifications in DAQ applications include an analog signal input bandwidth, gain
flatness, ENOB performance, and low occurrence of metastable states. A differential comparator design
and its decoding circuitry reduce out-of-sequence code errors, such as thermometer bubbles or sparkle
codes, and provide excellent metastable performance of less than one error per 10
16
clock cycles. Unlike
other ADCs, which may have errors that result in false full-scale or zero-scale outputs, the MAX104 keeps
its error magnitude to no more than 1LSB.
Furthermore, this fast ADC accomplishes outstanding numbers for integral-nonlinearity (INL) and
differential-nonlinearity (DNL) parameters, ensuring monotonic operation. After trimming, the MAX104
displays parameters as low as ±0.25LSB
(Figures 6, 7)
.
Figure 6. The MAX104's typical integral nonlinearity.
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