Add to Signal Chain Designer

AD7861:  11-Bit Resolution Simultaneous Sampling ADC

Product Details

The AD7861 is a multichannel simultaneous sampling A/D Converter (ADC) configured for the acquisition of voltage inputs in a motor control solution or three-phase power system.

The AD7861 combined with Analog Devices’ 16-bit fixed-point digital signal processor (DSP) provides a low cost 16-bit fixed-point microcontroller solution. The input stage has been designed to accommodate the types of signals frequently found in motor drives. The VIN1, VIN2, and VIN3 channels are simultaneously sampled inputs suitable for stator current acquisition. The AUX0–AUX3 channels are multiplexed and are suitable for slower moving inputs such as temperature and bus voltage of the diode rectifier output in a motor control application.


  • Motor Control
  • 3-Phase Power Measurement
  • Cellular Phones
  • Data Acquisition


  • 11-Bit Resolution Analog-to-Digital Converter
  • Seven Single-Ended Analog Inputs
    -- Four Input Channels Simultaneously Sampled
    -- Expansion with 4 Multiplexed Inputs
  • Internal 2.5 V Reference
  • 3.2 µs Conversion Time per Channel
  • User Definable Channel Sequencing
  • Single Supply +5 V Operation
  • Double Buffered Register Outputs
  • 6.25 MHz to 12.5 MHz Operating Clock Range

Functional Block Diagram for AD7861


Title Content Type File Type
AD7861: 11-Bit Resolution Simultaneous Sampling A/D Converter Data Sheet  (Rev B, 03/2000) (pdf, 95 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
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.

SampleSample & Buy

Price, packaging, availability

AD7861 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD7861AP Status: Production 44 ld PLCC 44 Ind Tube, 27 $18.20 $15.47 N  Material Info PCN Purchase
AD7861APZ Status: Production 44 ld PLCC 44 Ind Tube, 27 $14.99 $12.75 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.

content here.
content here.

Review this Product