ADC32RF83 datasheet(28/138 Pages) TI

Nome de Peças	ADC32RF83

Descrição Electrónicos	ADC32RF8x Dual-Channel, 3-GSPS Telecom Receiver and Feedback Devices

PDF	138 Pages

Scroll/Zoom	100%

Fabricante Electrônico	TI [Texas Instruments]

Página de início	http://www.ti.com

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28 / 138 page

INxP

INxM

RIN

TI Device

CIN

ZIN = RIN || CIN

SDD11 = (ZIN ± 100) / (ZIN + 100)

ADC32RF80, ADC32RF83

SBAS774A – MAY 2016 – REVISED DECEMBER 2016

www.ti.com

Product Folder Links: ADC32RF80 ADC32RF83

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8.3 Feature Description

8.3.1 Analog Inputs

The ADC32RF8x analog signal inputs are designed to be driven differentially. The analog input pins have internal

analog buffers that drive the sampling circuit. The ADC32RF8x 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 80 and Figure 81 show SDD11 at the analog inputs

from dc to 5 GHz with a 100-Ω reference impedance.

Figure 80. Equivalent Input Impedance

Figure 81. SDD11 Over the Input Frequency Range

ADC32RF83 Folha de dados(PDF) 28 Page - Texas Instruments