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AD9268:  16-BIT, 125 MSPS/105 MSPS/80 MSPS, 1.8 V DUAL ANALOG-TO-DIGITAL CONVERTER

The AD9268 is a dual, 16-bit, 80 MSPS/105 MSPS/125 MSPS analog-to-digital converter (ADC). The AD9268 is designed to support communications applications where high performance, combined with low cost, small size, and versatility, is desired.

The dual ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. Each ADC features wide ...More

AD9268:  16-BIT, 125 MSPS/105 MSPS/80 MSPS, 1.8 V DUAL ANALOG-TO-DIGITAL CONVERTER

Product Description

The AD9268 is a dual, 16-bit, 80 MSPS/105 MSPS/125 MSPS analog-to-digital converter (ADC). The AD9268 is designed to support communications applications where high performance, combined with low cost, small size, and versatility, is desired.

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 considerations. A duty cycle stabilizer is provided to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance.

The ADC output data can be routed directly to the two external 16-bit output ports. These outputs can be set to either 1.8 V CMOS or LVDS.

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 AD9268 is available in a 64-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 AD9258, allowing a simple migration from 16 bits to 14 bits. The AD9268 is also pin compatible with the AD9251, AD9231, and AD9204 family of products for lower sample rate, low power applications.

Applications

  • Communications
  • Diversity radio systems
  • Multimode digital receivers (3G)
      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

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EVALUATION BOARDS & DEVELOPMENT KITS

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TOOLS, SOFTWARE & SIMULATION MODELS

  • SNR = 78.2 dBFS @ 70 MHz and 125 MSPS
  • SFDR = 88 dBc @ 70 MHz and 125 MSPS
  • Low power: 750 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
  • −153.6 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
  • See data sheet for additional features
  • Resolution (Bits): 16bit
  • T-Put Rate: 125MSPS
  • # Chan: 2
  • Supply V: Multi(+1.8Anlg, +1.8Dig),Multi(+1.8Anlg, +3.3Dig) ,Single(+1.8)
  • Pwr Diss: 788mW
  • Interface: Par
  • Ain Range: (2Vref) p-p,1 V p-p,2 V p-p
  • Pkg Type: CSP

AD9268 Functional Block Diagram

Circuits from the Lab

Complementary Products

  • Analog Devices' new low-power ADCs are compatible with ADI's dual-channel VGA (variable gain amplifiers), including the AD8372 programmable dual VGA and AD8376 IF dual VGA as well as the ADL5561 differential RF/IF amplifier and ADL5562 differential RF/IF amplifier.
  • For DC-coupled applications, suggested ADC drivers include the ADA4937-2 or ADA4938-2.
  • Recommended clock generators include the AD9520-0 and AD9522-0.

Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
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.

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Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

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This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.