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AD9644:  14-Bit, 80 MSPS/155 MSPS, 1.8V Dual, Serial Output A/D Converter

Product Details

Product Status:Recommended for New Designs

For more information on JESD204 go to www.analog.com/jesd204.

The AD9644 is a dual, 14-bit, analog-to-digital converter (ADC) with a high speed serial output interface and sampling speeds of either 80 MSPS or 155 MSPS.

The AD9644 is designed to support communications appli-cations where high performance, combined with low cost, small size, and versatility, is desired. The JESD204A high speed serial interface reduces board routing requirements and lowers pin count requirements for the receiving device.

The dual ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide bandwidth differential sample-and-hold analog input amplifiers that support a variety of user-selectable input ranges. An integrated voltage reference eases design consid-erations. A duty cycle stabilizer is provided to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance.

By default, the ADC output data is routed directly to the two external JESD204A serial output ports. These outputs are at CML voltage levels. Two modes are supported such that output coded data is either sent through one data link or two. (L = 1; F = 4 or L = 2; F = 2). Independent synchronization inputs (DSYNC) are provided for each channel.

Flexible power-down options allow significant power savings, when desired.

Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface.

The AD9644 is available in a 48-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.

This product is protected by a U.S. patent.


Applications
  • Communications
  • Diversity radio systems
  • Multimode digital receivers (3G and 4G)
    GSM, EDGE, W-CDMA, LTE,
    CDMA2000, WiMAX, TD-SCDMA
  • I/Q demodulation systems
  • Smart antenna systems
  • General-purpose software radios
  • Broadband data applications
  • Ultrasound equipment

Product Highlights
  1. An on-chip PLL allows users to provide a single ADC sampling clock; the PLL multiplies the ADC sampling clock to produce the corresponding data rate clock.
  2. The configurable JESD204A output block supports up to 1.6 Gbps per channel data rate when using a dedicated data link per ADC or 3.2 Gbps data rate when using a single shared data link for both ADCs.
  3. Proprietary differential input that maintains excellent SNR performance for input frequencies up to 250 MHz.
  4. Operation from a single 1.8 V power supply.
  5. Standard serial port interface (SPI) that supports various product features and functions, such as data formatting (offset binary, twos complement, or gray coding), enabling the clock DCS, power-down, test modes, voltage reference mode, and serial output configuration.

FEATURES and BENEFITS

  • JESD204A coded serial digital outputs
  • SNR = 73.7 dBFS at 70 MHz and 80 MSPS
  • SNR = 71.7 dBFS at 70 MHz and 155 MSPS
  • SFDR = 92 dBc at 70 MHz and 80 MSPS
  • SFDR = 92 dBc at 70 MHz and 155 MSPS
  • Low power: 423 mW at 80 MSPS, 567 mW at 155 MSPS
  • 1.8 V supply operation
  • IF sampling frequencies to 250 MHz
  • Integer 1-to-8 input clock divider
  • −148.6 dBFS/Hz input noise at 180 MHz and 80 MSPS
  • -150.3 dBFS/Hz input noise at 180 MHz and 155 MSPS
  • Please see data sheet for additional features

AD9644 Functional Block Diagram

JESD204

Documentation

Title Content Type File Type
AD9644: 14-Bit, 80 MSPS/155 MSPS, 1.8 V Dual Serial Output Analog-to-Digital Converter (ADC) Data Sheet (Rev C, 01/2012) (pdf, 1082 kB) Data Sheets PDF
AN-1142: Techniques for High Speed ADC PCB Layout  (pdf, 392 kB) Application Notes PDF
AN-878: High Speed ADC SPI Control Software  (pdf, 585 kB) Application Notes PDF
AN-807: Multicarrier WCDMA Feasibility  (pdf, 969 kB) Application Notes PDF
AN-808: Multicarrier CDMA2000 Feasibility  (pdf, 1535 kB)
The goal of this application note is to determine the feasibility of implementing a multicarrier CDMA2000 transceiver and what the major subsystem performances must be.
Application Notes PDF
AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs  (pdf, 203 kB) Application Notes PDF
AN-877: Interfacing to High Speed ADCs via SPI  (pdf, 1594 kB) Application Notes PDF
AN-935: Designing an ADC Transformer-Coupled Front End  (pdf, 363 kB) Application Notes PDF
AN-586: LVDS Outputs for High Speed A/D Converters  (pdf, 207 kB)
High Speed ADCs Uses LVDS (Low-Voltage Differential Signaling) to Minimize Performance Limitations In ADC Applications When Providing High Speed Data Output
Application Notes PDF
AN-812:  MicroController-Based Serial Port Interface (SPI) Boot Circuit (pdf, 452,449 bytes)  (pdf, 441 kB)
This application note describes the operation of a general-purpose, microcontroller-based Serial Port Interface (SPI) boot circuit.
Application Notes PDF
AN-742: Frequency Domain Response of Switched-Capacitor ADCs  (pdf, 401 kB) Application Notes PDF
JESD204A Converters Reduce Power & Space in Comms Applications
The AD9644 is a low-power, high-speed 14-bit ADCs with JESD204A data converter serial interface allow designers to extend transmission lengths while improving signal integrity and simplifying printed-circuit board layout.
Videos HTML
UG-294: Evaluating the AD9644/AD9641 Analog-to-Digital Converters  (pdf, 4934 kB) User Guides PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Improve The Design Of Your Passive Wideband ADC Front-End Network
As converter technology improves, so does the demand to resolve very high intermediate frequencies (IFs) accurately at high speeds. This poses two challenges: the converter design itself and the front-end design that couples the signal content to the converter. Even if the converter itself is excellent, the front end must be able to preserve the signal quality too.
(Electronic Design, 3/26/2010)
Technical Articles HTML
Analog-to-Digital Converter and Driver ICs Solutions Bulletins HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADIsimADC
ADIsimADC is Analog Devices' Analog-to-Digital Behavioral Model that accurately models the typical performance characteristics of many of our High Speed Converters. The model faithfully reproduces the errors associated with both static and dynamic features such as AC linearity, clock jitter, and many other product specific anomalies.
ADIsim Design/Simulation Tools HTML
AD9644 IBIS Model  (ibs) IBIS Models IBS

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products


Recommended Driver Amplifiers for the AD9644

  • For differential RF/IF, we recommend the ADL5561 or the ultra low distortion ADL5562.
Recommended VGA's for the AD9644
  • For an independent, dual channel, digitally controlled VGA, we suggest the AD8372.
  • For an ultralow distortion, IF dual channel VGA, we recommend the AD8376.
Recommended Clock Drivers for the AD9644
  • For low jitter performance and integrated VCO, we recommend the AD9520-0 and AD9522-0.
Recommended Power Solutions

  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD9644 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD9644BCPZ-155 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Tray, 260 $75.00 $63.75 Y  Material Info Notify Me Purchase
AD9644BCPZ-80 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Tray, 260 $49.00 $41.65 Y  Material Info Notify Me Purchase
AD9644BCPZRL7-155 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Reel, 750 $75.00 $63.75 Y  Material Info Notify Me Purchase
AD9644BCPZRL7-80 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Reel, 750 - $41.65 Y  Material Info Notify Me Purchase
AD9644CCPZ-80 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Tray, 260 $44.11 $37.50 Y  Material Info Notify Me Purchase
AD9644CCPZRL7-80 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Reel, 750 - $37.50 Y  Material Info Notify Me Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

AD9644 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD9644-155KITZ Status: Production Evaluation Board $900.00 Yes -
AD9644-80KITZ Status: Production Evaluation Board $900.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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