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CDCM6208V1FRGZR Datasheet(PDF) 70 Page - Texas Instruments

Part No. CDCM6208V1FRGZR
Description  2:8 Clock Generator, Jitter Cleaner with Fractional Dividers
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

CDCM6208V1FRGZR Datasheet(HTML) 70 Page - Texas Instruments

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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
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Copyright © 2015, Texas Instruments Incorporated
Product Folder Links: CDCM6208V1F


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