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ADC32RF55 Datasheet(PDF) 46 Page - Texas Instruments

Part # ADC32RF55
Description  ADC32RF5x Dual Channel 14-bit 2.6 to 3-GSPS RF Sampling Data Converter
PDF  126 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADC32RF55 Datasheet(HTML) 46 Page - Texas Instruments

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The internal aperture jitter is also dependent on the amplitude of the external clock input signal. Figure 7-12 and
Figure 7-13 show the expected SNR performance with dither on/off across clock amplitude (FS = 2.6 GSPS).
Figure 7-12. SNR vs Clock Amplitude (Dither OFF)
Figure 7-13. SNR vs Clock Amplitude (Dither ON)
The sampling clock input is internally terminated to 100 Ω differentially and provides a return loss better than 10
dB at 3 GHz (see Figure 7-14). The clock input consists of a single clock input buffer followed by a dedicated
clock buffer for ADCA1/2 as well as ADCB1/2. When averaging multiple ADCs, there are some close in clock
buffer noise which is correlated; and thus, does not improve with averaging.
CLKP
CLKM
To ADCA1/2
To ADCB1/2
5 k
V
CM
5 k
100
V
CM
Buffer
Figure 7-14. Internal Clock Input Routing
ADC32RF54, ADC32RF55
SBAS500A – JUNE 2022 – REVISED DECEMBER 2022
www.ti.com
46
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Product Folder Links: ADC32RF54 ADC32RF55



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