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ADC32RF44IRMPR Datasheet(PDF) 23 Page - Texas Instruments

Part # ADC32RF44IRMPR
Description  ADC32RF44 Dual-Channel, 14-Bit, 2.6-GSPS, Analog-to-Digital Converter
PDF  135 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ADC32RF44IRMPR Datasheet(HTML) 23 Page - Texas Instruments

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INxP
INxM
RIN
TI Device
CIN
ZIN = RIN || CIN
SDD11 = (ZIN ± 100) / (ZIN + 100)
Copyright © 2016, Texas Instruments Incorporated
23
ADC32RF44
www.ti.com
SBAS809A – FEBRUARY 2017 – REVISED MARCH 2017
Product Folder Links: ADC32RF44
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
9.3 Feature Description
9.3.1 Analog Inputs
The ADC32RF44 analog signal inputs are designed to be driven differentially. The analog input pins have
internal analog buffers that drive the sampling circuit. The ADC32RF44 provides on-chip, differential termination
to minimize reflections. The buffer also helps isolate the external driving circuit from the internal switching
currents of the sampling circuit, thus resulting in a more constant SFDR performance across input frequencies.
The common-mode voltage of the signal inputs is internally biased to CM using the 32.5-
Ω termination resistors
that allow for ac-coupling of the input drive network. Figure 58 and Figure 59 show SDD11 at the analog inputs
from dc to 5 GHz with a 100-Ω reference impedance.
Figure 58. Equivalent Input Impedance
Figure 59. SDD11 Over the Input Frequency Range



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