AD9083BBCZ datasheet(29/93 Pages) AD

tên linh kiện	AD9083BBCZ

Giải thích chi tiết về linh kiện	16-Channel, 125 MHz Bandwidth, JESD204B Analog-to-Digital Converter

PDF	93 Pages

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nhà sản xuất	AD [Analog Devices]

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29 / 93 page

Data Sheet

AD9083

Rev. 0 | Page 29 of 93

LOW-PASS, CTSD ADC OVERVIEW

The AD9083 uses a voltage control oscillator (VCO)-based

CTSD modulator ADC to convert the analog input to a digital

word. The digital word can then be processed by a digital backend

that provides decimation filtering, rate adjustment, DDC

frequency shifting, and FIR filtering. The ADC samples at a

rate (fS) between 1 GSPS and 2 GSPS. The typical maximum

oversampling ratio (OSR) is 8 for a usable bandwidth up to fS/16.

LOW-PASS Σ-Δ ADC

Figure 56 shows a simplified, single-ended representation of the

low power Σ-Δ ADC modulator. The ADC is a first-order, single-

stage modulator. The NTF is first order. Therefore, a relatively

high OSR is required to reduce noise in the signal band of

interest. For a more detailed description of the modulator,

see IEEE JSSC 2010 and IEEE JSSC 2013.

NON-

LINEARITY

CORRECTION

–

NON-

LINEARITY

CORRECTION

OVER-

RANGE

CORR

OVER-

RANGE

CORR

PHASE

DECODER

PHASE

DECODER

RING

SAMPLER

SIGNAL CONVERTER

10x3 – ELEMENT

ICRO

10x3 – ELEMENT

ICRO

CALIBRATION UNIT

RING

SAMPLER

1–z–1

V/I

v(t)

Figure 56. Simplified, Single-Ended, Low Power, Σ-Δ ADC Modulator

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