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AD9255:  14-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Analog-to-Digital Converter

Product Details


The AD9255 is a 14-bit, 125 MSPS analog-to-digital converter (ADC). The AD9255 is designed to support communications applications where high performance combined with low cost, small size, and versatility is desired.

The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic to provide 14-bit accuracy at 125 MSPS data rates and guarantees no missing codes over the full operating temperature range.

The ADC features a wide bandwidth differential sample-and-hold analog input amplifier supporting a variety of user-selectable input ranges. It is suitable for multiplexed systems that switch full-scale voltage levels in successive channels and for sampling single-channel inputs at frequencies well beyond the Nyquist rate. Combined with power and cost savings over previously available ADCs, the AD9255 is suitable for applications in communications, instrumentation, and medical imaging.

A differential clock input controls all internal conversion cycles. A duty cycle stabilizer provides the means to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance over a wide range of input clock duty cycles. An integrated voltage reference eases design considerations.

The ADC output data format is either parallel 1.8 V CMOS or LVDS (DDR). A data output clock is provided to ensure proper latch timing with receiving logic.

Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface. Flexible power-down options allow significant power savings, when desired. An optional on-chip dither function is available to improve SFDR performance with low power analog input signals.

The AD9255 is available in a Pb-free, 48-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.

PRODUCT HIGHLIGHTS
  1. On-chip dither option for improved SFDR performance with low power analog input.
  2. Proprietary differential input that maintains excellent SNR performance for input frequencies up to 300 MHz.
  3. Operation from a single 1.8 V supply and a separate digital output driver supply accommodating 1.8 V CMOS or LVDS outputs.
  4. 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, and voltage reference mode.
  5. Pin compatibility with the AD9265, allowing a simple migration up to 16 bits.
Applications
  • Communications
  • Multimode digital receivers (3G)
    GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA
  • Smart antenna systems
  • General-purpose software radios
  • Broadband data applications
  • Ultrasound equipment

FEATURES and BENEFITS

  • SNR = 78.3 dBFS @ 70 MHz and 125 MSPS
  • SFDR = 93 dBc @ 70 MHz and 125 MSPS
  • Low power: 371 mW @ 125 MSPS
  • 1.8 V analog supply operation
  • 1.8 V CMOS or LVDS output supply
  • Integer 1-to-8 input clock divider
  • IF sampling frequencies to 300 MHz
  • −153.4 dBm/Hz small signal input noise with 200 Ω input impedance @ 70 MHz and 125 MSPS
  • Optional on-chip dither
  • Programmable internal ADC voltage reference
  • Integrated ADC sample-and-hold inputs
  • See data sheet for additional features

AD9255 Functional Block Diagram

sample availability and additional technical information

This product is released to manufacturing. Please contact the High Speed Converters Development Group for sample availability and additional technical information.

Documentation

Title Content Type File Type
AD9255: 14-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Analog-to-Digital Converter Data Sheet (Rev C, 07/2013) (pdf, 733 kB) Data Sheets 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
AN-741: Little Known Characteristics of Phase Noise  (pdf, 1679 kB) Application Notes PDF
UG-074: Evaluating the AD9265/AD9255 Analog-to-Digital Converters  (pdf, 1446 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
Peak High-speed Performance even at low power. Overview 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
AD9255/AD9265 S-Parameters  (xls, 1329 kB) S-Parameters XLS
AD9255 IBIS Models IBIS Models HTML

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 AD9255

  • For differential RF/IF, we recommend the ADL5561 or the ultra low distortion ADL5562.
Recommended VGA's for the AD9255
  • 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 AD9255
  • 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

AD9255 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD9255BCPZ-105 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Tray, 260 $52.94 $45.00 Y  Material Info Notify Me Purchase
AD9255BCPZ-125 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Tray, 260 $70.50 $59.93 Y  Material Info Notify Me Purchase
AD9255BCPZ-80 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Tray, 260 $38.82 $33.00 Y  Material Info Notify Me Purchase
AD9255BCPZRL7-105 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Reel, 750 $52.94 $45.00 Y  Material Info Notify Me Purchase
AD9255BCPZRL7-125 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Reel, 750 $70.50 $59.93 Y  Material Info Notify Me Purchase
AD9255BCPZRL7-80 Status: Production 48 ld LFCSP (7x7x.85mm w/5.5mm Pad) 48 Ind Reel, 750 $38.82 $33.00 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.

AD9255 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD9255-105EBZ Status: Production Evaluation Board $200.00 Yes -
AD9255-125EBZ Status: Production Evaluation Board $200.00 Yes -
AD9255-80EBZ Status: Production Evaluation Board $200.00 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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