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AD9281:  Dual Channel 8-Bit Resolution CMOS ADC

Product Details

The AD9281 is a complete dual channel, 28 MSPS, 8-bit CMOS ADC. The AD9281 is optimized specifically for applications where close matching between two ADCs is required (e.g., I/Q channels in communications applications). The 28 MHz sampling rate and wide input bandwidth will cover both narrow-band and spread-spectrum channels. The AD9281 integrates two 8-bit, 28 MSPS ADCs, two input buffer amplifiers, an internal voltage reference and multiplexed digital output buffers.


  • Complete Dual Matching ADC
  • Low Power Dissipation:
    225 mW (+3 V Supply)
  • Single Supply: 2.7 V to 5.5 V
  • Differential Nonlinearity Error: 0.1 LSB
  • On-Chip Analog Input Buffers
  • On-Chip Reference
  • Signal-to-Noise Ratio: 49.2 dB
  • Over Seven Effective Bits
  • Spurious-Free Dynamic Range: –65 dB
  • No Missing Codes Guaranteed
  • 28-Lead SSOP

Functional Block Diagram for AD9281


Title Content Type File Type
AD9281: Dual Channel 8-Bit Resolution CMOS ADC Data Sheet  (Rev F, 01/2011) (pdf, 406 kB) Data Sheets PDF
AN-282: Fundamentals of Sampled Data Systems  (pdf, 2131 kB) Application Notes PDF
AN-737: How ADIsimADC Models an ADC  (pdf, 373 kB) Application Notes PDF
AN-905: VisualAnalog Converter Evaluation Tool Version 1.0 User Manual  (pdf, 2124 kB) Application Notes PDF
AN-935: Designing an ADC Transformer-Coupled Front End  (pdf, 363 kB) Application Notes PDF
AN-835: Understanding High Speed ADC Testing and Evaluation  (pdf, 985 kB) Application Notes PDF
AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated  (pdf, 370 kB) Application Notes PDF
AN-345: Grounding for Low-and-High-Frequency Circuits  (pdf, 455 kB)
Know Your Ground and Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance....
Application Notes PDF
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter  (pdf, 291 kB) Application Notes PDF
AN-501: Aperture Uncertainty and ADC System Performance  (pdf, 227 kB)
A Key Concern in IF Sampling is that of Aperture Uncertainty (Jitter)
Application Notes PDF
AN-297: Test Video A/D Converters Under Dynamic Conditions  (pdf, 731 kB) Application Notes PDF
AN-302: 02: Exploit Digital Advantages in an SSB Receiver  (pdf, 417 kB) Application Notes PDF
UG-173: High Speed ADC USB FIFO Evaluation Kit (HSC-ADC-EVALB-DCZ)  (pdf, 774 kB) User Guides PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
Proper Grounding Is Critical For High-Speed Systems
... by Walt Kester and James Bryant, Analog Devices, Inc. (Wireless Systems Design, May 2000)
Technical Articles HTML
DNL and Some of its Effects on Converter Performance
... by Brad Brannon, Analog Devices, Inc. (Wireless Design & Development, June 2001)
Technical Articles HTML
Correlating High-Speed ADC Performance to Multicarrier 3G Requirements
by Brad Brannon (RF Design, 6/1/2003)
Technical Articles HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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.

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Price, packaging, availability

AD9281 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD9281ARS Status: Production 28 ld SSOP 28 Ind Tube, 47 $5.00 $4.75 N  Material Info PCN Purchase
AD9281ARSRL Status: Production 28 ld SSOP 28 Ind Reel, 1500 - $4.75 N  Material Info PCN Purchase
AD9281ARSZ Status: Production 28 ld SSOP 28 Ind Tube, 47 $4.12 $3.91 Y  Material Info PCN Purchase Sample
AD9281ARSZRL Status: Production 28 ld SSOP 28 Ind Reel, 1500 - $3.91 Y  Material Info PCN 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.

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