ADC3683 datasheet(28/91 Pages) TI2

28 / 91 page

8 Detailed Description

8.1 Overview

The ADC368x is a low noise, ultra-low power 18-bit high-speed dual channel ADC family supporting sampling

rates up to 65 MSPS. It offers excellent DC precision together with IF sampling support which makes it ideally

suited for a wide range of applications. The ADC368x is equipped with an internal reference option but it also

supports the use of an external, high precision 1.6 V voltage reference or an external 1.2 V reference which is

buffered and gained up internally. Because of the inherent low latency architecture, the digital output result is

available after only one or two clock cycles depending on the digital output interface.

An optional programmable digital down converter enables external anti-alias filter relaxation as well as output

data rate reduction. The digital filter provides a 32-bit programmable NCO and supports both real or complex

decimation.

The ADC368x uses a serial LVDS (SLVDS) interface to output the data which minimizes the number of digital

interconnects. The device supports a two-lane (2-wire), a one-lane (1-wire) and a half-lane (1/2-wire) option. The

ADC368x includes a digital output formatter which supports output resolutions from 14 to 20-bit.

The device features and control options can be set up either through pin configurations or via SPI register writes.

8.2 Functional Block Diagram

Control

AIN

CLK

VREF

ADC

18bit

1.2V REF

REFBUF

Digital Downconverter

NCO

BIN

ADC

18bit

NCO

0.95V

VCM

DB0/1

DCLKIN

DCLK

FCLK

DA0/1

Dig I/F

SLVDS

Crosspoint

Switch

ADC3681, ADC3682, ADC3683

SBAS872B – DECEMBER 2020 – REVISED OCTOBER 2022

www.ti.com

Submit Document Feedback

Product Folder Links: ADC3681 ADC3682 ADC3683

ADC3683 Datasheet(PDF) 28 Page - Texas Instruments

ADC3683 Datasheet(HTML) 28 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

Datasheet Download

Link URL