ADS6444

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Quad-Channel, 14-Bit, 105-MSPS Analog-to-Digital Converter (ADC)

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Product details

Parameters

Sample rate (Max) (MSPS) 105 Resolution (Bits) 14 Number of input channels 4 Interface type Serial LVDS Analog input BW (MHz) 500 Features High Performance Rating Catalog Input range (Vp-p) 2 Power consumption (Typ) (mW) 1350 Architecture Pipeline SNR (dB) 73.8 ENOB (Bits) 11.7 SFDR (dB) 91 Operating temperature range (C) -40 to 85 Input buffer No open-in-new Find other High-speed ADCs (>10MSPS)

Package | Pins | Size

VQFN (RGC) 64 81 mm² 9.0 x 9.0 open-in-new Find other High-speed ADCs (>10MSPS)

Features

  • Maximum Sample Rate: 125 MSPS
  • 14-Bit Resolution with No Missing Codes
  • Simultaneous Sample and Hold
  • 3.5dB Coarse Gain and up to 6dB Programmable Fine Gain for SFDR/SNR Trade-Off
  • Serialized LVDS Outputs with Programmable Internal Termination Option
  • Supports Sine, LVCMOS, LVPECL, LVDS Clock Inputs and Amplitude down to 400 mVPP
  • Internal Reference with External Reference Support
  • No External Decoupling Required for References
  • 3.3-V Analog and Digital Supply
  • 64 QFN Package (9 mm × 9 mm)
  • Pin Compatible 12-Bit Family (ADS642X - SLAS532A)
  • Feature Compatible Dual Channel Family (ADS624X - SLAS542A, ADS644X - SLAS543A)
  • APPLICATIONS
    • Base-Station IF Receivers
    • Diversity Receivers
    • Medical Imaging
    • Test Equipment
open-in-new Find other High-speed ADCs (>10MSPS)

Description

The ADS6445/ADS6444/ADS6443/ADS6442 (ADS644X) is a family of high performance 14-bit 125/105/80/65 MSPS quad channel A-D converters. Serial LVDS data outputs reduce the number of interface lines, resulting in a compact 64-pin QFN package (9 mm × 9 mm) that allows for high system integration density. The device includes 3.5dB coarse gain option that can be used to improve SFDR performance with little degradation in SNR. In addition to the coarse gain, fine gain options also exist, programmable in 1dB steps up to 6dB.

The output interface is 2-wire, where each ADC data is serialized and output over two LVDS pairs. This makes it possible to halve the serial data rate (compared to a 1-wire interface) and restrict it to less than 1Gbps easing receiver design. The ADS644X also includes the traditional 1-wire interface that can be used at lower sampling frequencies.

An internal phase lock loop (PLL) multiplies the incoming ADC sampling clock to derive the bit clock. The bit clock is used to serialize the 14-bit data from each channel. In addition to the serial data streams, the frame and bit clocks are also transmitted as LVDS outputs.

The LVDS output buffers have features such as programmable LVDS currents, current doubling modes and internal termination options. These can be used to widen eye-openings and improve signal integrity, easing capture by the receiver.

The ADC channel outputs can be transmitted either as MSB or LSB first and 2s complement or straight binary.

The ADS644X has internal references, but can also support an external reference mode. The device is specified over the industrial temperature range (–40°C to 85°C).

open-in-new Find other High-speed ADCs (>10MSPS)
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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet QUAD CHANNEL, 14-BIT, 125/105/80/65 MSPS ADC WITH SERIAL LVDS OUTPUTS datasheet (Rev. B) Dec. 16, 2009
Technical articles Keys to quick success using high-speed data converters Oct. 13, 2020
Technical articles How to achieve fast frequency hopping Mar. 03, 2019
Application note QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Technical articles RF sampling: Learning more about latency Feb. 09, 2017
Technical articles Why phase noise matters in RF sampling converters Nov. 28, 2016
Application note Design Considerations for Avoiding Timing Errors during High-Speed ADC, LVDS Dat (Rev. A) May 22, 2015
Application note Why Use Oversampling when Undersampling Can Do the Job? (Rev. A) Jul. 19, 2013
More literature TI and Altera Ease Design Process with Compatible Evaluation Tools Apr. 25, 2011
More literature TI and Xilinx Ease Design Process with Compatible Evaluation Tools Apr. 25, 2011
Application note Driving High-Speed ADCs: Circuit Topologies and System-Level Parameters (Rev. A) Sep. 10, 2010
Application note Smart Selection of ADC/DAC Enables Better Design of Software-Defined Radio Apr. 28, 2009
Application note CDCE62005 as Clock Solution for High-Speed ADCs Sep. 04, 2008
User guide TSW1200EVM: High Speed LVDS Deserializer and Analysis System (Rev. A) Aug. 27, 2008
Application note CDCE72010 as a Clocking Solution for High-Speed Analog-to-Digital Converters Jun. 08, 2008
Application note Phase Noise Performance and Jitter Cleaning Ability of CDCE72010 Jun. 02, 2008
User guide ADS6245EVM and Lattice ECP2/M Interface Demo User Guide Jan. 14, 2008
User guide ADS64XX EVM User's Guide Apr. 16, 2007
Application note QFN Layout Guidelines Jul. 28, 2006

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
99
Description

The TSW1405EVM is a low cost data capture circuit board used to evaluate some of Texas Instruments’ (TI) most popular high speed analog-to-digital converters (ADC).

 

The TSW1405EVM supports a high speed LVDS bus capable of providing 16-bit samples at 1.0 GSPS. The platform supports a 64k sample depth (...)

Features
  • Simple 16-bit waveform capture from many of TI’s high speed ADC EVM’s
  • Supports 64k sample depth at up to 1.0 GSPS LVDS I/O rates
  • LatticeECP3 high speed mini FPGA
  • Analyzes up to 8 channels concurrently
  • Single mini USB cable for power and data
  • Utilizes an intuitive/easy-to-use GUI package
  • Industry’s (...)
  • Software development

    SUPPORT SOFTWARE Download
    High-speed data converter pro software
    DATACONVERTERPRO-SW This high-speed data converter pro GUI is a PC (Windows® XP/7 compatible) program designed to aid in evaluation of most TI high-speed data converter and analog front-end (AFE) platforms. Designed to support the entire TSW14xxx series of data-capture and pattern-generation cards (...)
    Features
    • Compatible with TSW1400, TSW1405, TSW1406 and TSW14J10, TSW14J50, TSW14J56, and TSW14J57 pattern-generation and data-capture platforms
    • Works with all TI high-speed DAC, ADC, and AFE products
    • Provides time-domain and frequency-domain analysis
    • Supports single-tone, multi-tone, and modulated (...)

    Design tools & simulation

    SIMULATION TOOL Download
    PSpice® for TI design and simulation tool
    PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
    Features
    • Leverages Cadence PSpice Technology
    • Preinstalled library with a suite of digital models to enable worst-case timing analysis
    • Dynamic updates ensure you have access to most current device models
    • Optimized for simulation speed without loss of accuracy
    • Supports simultaneous analysis of multiple products
    • (...)
    CALCULATION TOOL Download
    Jitter and SNR Calculator for ADCs
    JITTER-SNR-CALC JITTER-SNR-CALC can be used for calculating theoretical Signal to Noise (SNR) performance of ADCs based on input frequency and clock jitter.
    DESIGN TOOL Download
    SLAC132A.ZIP (559 KB)

    CAD/CAE symbols

    Package Pins Download
    VQFN (RGC) 64 View options

    Ordering & quality

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