AD7961:  16-Bit, 5 MSPS PULSAR® Differential ADC

Product Details

Product Status:Recommended for New Designs

The AD7961 is a 16-bit, 5 MSPS charge redistribution successive approximation (SAR), analog-to-digital converter (ADC). The SAR architecture allows unmatched performance both in noise and in linearity. The AD7961 contains a low power, high speed, 16-bit sampling ADC, an internal conversion clock and an internal reference buffer. On the CNV edge, the AD7961 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and 4.096 V/5 V. The reference voltage is applied to the part externally. All conversion results are available on a single LVDS self-clocked or echo-clocked serial interface.

The AD7961 is available in a 32-lead LFCSP (QFN) with operation specified from −40°C to +85°C.

APPLICATIONS

  • Digital imaging systems
     Digital X-rays
     Computed tomography
     IR cameras
  • MRI gradient control
  • High speed data acquisition
  • Spectroscopy
  • Test equipment

FEATURES and BENEFITS

  • Throughput: 5 MSPS
  • 16-bit resolution with no missing codes
  • SNR: 95.5 dB
  • INL: ±0.2 LSB
  • DNL: ±0.14 LSB
  • Internal reference buffer
  • True differential analog input voltage range: ±4.096 V or ±5 V
  • Low power dissipation (39 mW)
  • SAR architecture
  • External Reference Options
  • Serial LVDS interface
  • 32-lead, 5mm × 5mm LFCSP (QFN)
  • See datasheet for further details

Functional Block Diagram for AD7961

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Video: AD7960: The First 5MSPS 18-bit PulSAR ADC

Documentation

Title Content Type File Type
AD7961: 16-Bit, 5 MSPS PulSAR Differential ADC Data Sheet (Rev B, 03/2014) (pdf, 574 kB) Data Sheets PDF
AN-1279: How to Oversample 5 MSPS, 18-Bit/16-Bit Precision SAR Converters to Increase Dynamic Range  (pdf, 416 kB) Application Notes PDF
UG-581: Evaluating the AD7961 16-Bit, 5 MSPS PulSAR Differential ADC  (pdf, 1793 kB) User Guides PDF
High-Performance Data-Acquisition System Enhances Images for Digital X-Ray and MRI Analog Dialogue HTML
Let's Compare SAR & Δ-Σ Converters for a Mux'd DAS (Planet Analog, 12/2013)
For data acquisition systems, sometimes a successive approximation ADC works best. Other times, a delta-sigma is the best choice. Consideration must also be given to the multiplexer. Let's see what works best and why.
Technical Articles HTML
Get ADC Data Beyond the Data Sheet
(EDN, 12/2013)
Technical Articles HTML
Increase Dynamic Range With SAR ADCs Using Oversampling (Planet Analog, 11/2013)
Oversampling is used with ADCs, most commonly with delta-sigma devices. But the technique works well with SAR ADCs to improve dynamic range, reduce noise, and increase the ENOB.
Technical Articles HTML
Which Is Better: SAR or Delta-Sigma ADCs
(By Maithil Pachchigar, Applications Engineer, Analog Devices, Inc., 10/24/2013)
Technical Articles HTML
Imaging Improvements: High performance data acquisition system enhances images for digital X-ray and MRI
(New Electronics Digital Magazine, 10/2013)
Technical Articles HTML
Industry’s Fastest 18-Bit SAR A/D Converter Unveiled (04 Sep 2013) Press Releases HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD7961Wiki : FMC Card & Xilinx Reference Design Design Tool HTML
AD7961 IBIS Model  (ibs) IBIS Models IBS
AD7961 Native FMC Card & Xilinx Reference Design (Wiki Site) Device Drivers 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 AD7961 Recommended External Voltage References for the AD7961
  • For driving the voltage reference input, we recommend the AD8031 buffer amplifier.

Recommended Low Dropout Regulators and Switchers for the AD7961

Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

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.

AD7961 Evaluation Kit
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7961FMCZ Status: Production Evaluation Board $99.00 Yes -
EVAL-SDP-CH1Z Status: Production Evaluation Controller Board $199.00 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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