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ADC12J1600 Datasheet(PDF) 85 Page - Texas Instruments |
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ADC12J1600 Datasheet(HTML) 85 Page - Texas Instruments |
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85 / 98 page  Sample Number (n) 0 8 16 24 32 40 0 800 1600 2400 3200 4000 D097 Frequency (MHz) 0 80 160 240 320 400 480 560 640 720 800 -100 -80 -60 -40 -20 0 D098 ADC12J1600, ADC12J2700 www.ti.com SLAS969C – JANUARY 2014 – REVISED JULY 2015 8.2.2.1 Design Requirements For this design example, use the parameters listed in Table 88. Table 88. Design Parameters DESIGN PARAMETERS EXAMPLE VALUES Maximum sample rate 1600 MSPS Maximum input frequency 1500 MHz 1-dB flat-frequency range 0 to 1000 MHz Signal maximum amplitude 6 dBm Signal minimum amplitude 48 dBc Maximum capture depth 1 million points 8.2.2.2 Detailed Design Procedure Use the following primary steps to design a 12-bit oscilloscope: • Select the desired sampling rate based on the maximum sampling-rate requirement. • Select the input path components (LNA, amplifier, and other components) based on the maximum input frequency and 1-dB flat-frequency range requirements. • Set the attenuation range steps based on the required minimum and maximum values for the signal amplitude. • Select the memory size based on the resolution of the ADC output (12 bits) and the required maximum number of sample points. 8.2.2.3 Application Curves The following curves show the time-domain sample data for a 150-MHz input signal at –1 dBFS, sampled at 1600 MSPS using the ADC12J1600 device. Figure 113 shows the raw time-domain data. Figure 114 shows the spectrum of the captured signal which shows the additional capability of a 12-bit ADC oscilloscope to provide basic spectrum-analysis functions with reasonable performance. FIN = 147.97 MHz at –1 dBFS ƒS = 1600 MSPS FIN = 147.97 MHz at –1 dBFS ƒS = 1600 MSPS Figure 113. Raw Time-Domain Data Figure 114. Captured Signal Spectrum Copyright © 2014–2015, Texas Instruments Incorporated Submit Documentation Feedback 85 Product Folder Links: ADC12J1600 ADC12J2700 |
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