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CDCM6208V1FRGZR Datasheet(PDF) 70 Page - Texas Instruments |
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CDCM6208V1FRGZR Datasheet(HTML) 70 Page - Texas Instruments |
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70 / 87 page  A Ref -14.1 dBm Att 5 dB * * * * 1 RM CLRWR RBW 30 kHz VBW 300 kHz SWT 1 s NOR * Center 245.76 MHz Span 25.5 MHz 2.55 MHz/ PRN -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 Tx Channel W-CDMA 3GPP FWD Bandwidth 3.84 MHz Power -9.39 dBm Adjacent Channel Bandwidth 3.84 MHz Lower -72.81 dB Spacing 5 MHz Upper -72.40 dB Alternate Channel Bandwidth 3.84 MHz Lower -77.79 dB Spacing 10 MHz Upper -78.31 dB A Ref -14.1 dBm Att 5 dB * * * * 1 RM CLRWR RBW 30 kHz VBW 300 kHz SWT 1 s NOR * Center 245.76 MHz Span 25.5 MHz 2.55 MHz/ PRN -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 Tx Channel W-CDMA 3GPP FWD Bandwidth 3.84 MHz Power -9.40 dBm Adjacent Channel Bandwidth 3.84 MHz Lower -73.12 dB Spacing 5 MHz Upper -73.06 dB Alternate Channel Bandwidth 3.84 MHz Lower -79.22 dB Spacing 10 MHz Upper -79.19 dB 245.76MHz DAC driven from ³LGHDOVRXUFH´ (Wenzel oscillator buffered by HP8133A) 245.76MHz DAC driven from CDCM6208 (no performance degradation observed) CDCM6208V1F SCAS943 – MAY 2015 www.ti.com Observation: up to an IF = 100 MHz, The ADC performance when driven by the CDCM6208V1F (Figure 53) is similar to when the ADC is driven by an expensive lab signal generator with additional passive source filtering (Figure 52). Conclusion Therefore, the CDCM6208V1F is usable for applications up to 100 MHz IF. For IF above 100 MHz, the SNR starts degrading in our experiments. Measurements were conducted with ADC connected to Y0 and other outputs running at different integer frequencies. Important note on crosstalk: it is highly recommended that both pre-dividers are configured identically, as otherwise SFDR and SNR suffer due to crosstalk between the two pre-divider frequencies. Figure 54. DAC Driven by Lab Source and CDCM6208V1F in Comparison (Performance Identical) Observation/Conclusion: The DAC performance was not degraded at all by the CDCM6208V1F compared to driving the DAC with a perfect lab source. Therefore, the CDCM6208V1F provides sufficient low noise to drive a 245.76 MHz DAC. 70 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: CDCM6208V1F |
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