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AD2S99:  Programmable Oscillator

Product Details

The AD2S99 programmable sinusoidal oscillator provides sine wave excitation for resolvers and a wide variety of ac transducers.

The AD2S99 also provides a synchronous reference output signal (3 V p-p square wave) that is phase locked to its SIN and COS inputs. In an application, the SIN and COS inputs are connected to the transducer’s secondary windings. The synchronous reference output compensates for temperature and cabling dependent phase shifts and eliminates the need for external preset phase compensation circuits. The synchronous reference output can be used as a zero crossing reference for resolver-to-digital converters such as Analog Devices’ AD2S80A, AD2S82A, AD2S83 and AD2S90.

The AD2S99 is packaged in a 20-pin PLCC and operates over –40ºC to +85ºC.


  • Programmable Sinusoidal Oscillator
  • Synthesized Synchronous Reference Output
  • Programmable Output Frequency Range:
    2 kHz–20 kHz
  • “Loss-of-Signal” Indicator
  • 20-Pin PLCC Package
  • Low Cost

Functional Block Diagram for AD2S99

AD2S99 Diagram
Functional Block Diagram for AD2S99


Title Content Type File Type
AD2S99: Programmable Oscillator Data Sheet  (Rev B, 06/1995) (pdf, 317 kB) Data Sheets PDF
AN-264: Dynamic Characteristics of Tracking Converter  (pdf, 205 kB) Application Notes PDF
AN-263: Resolver to Digital Conversion; Simple Alternative to Optical Shaft Encoders  (pdf, 520 kB) Application Notes PDF
Single Chip DSP Motor Control Systems Catching on in Home Appliances  (pdf, 18 kB)
An article by David Krakauer of Analog Devices, reprinted from the October 2000 issue of Appliance Magazine. This article addresses how Embedded DSP motor control is revolutionizing the appliance industry, not only by delivering the highest levels of motor performance, but also by the method employed to deliver that high performance.
Technical Articles PDF
DSP Motor Control in Domestic Appliance Applications  (pdf, 161 kB)
An article by Dr. Aengus Murray of Analog Devices printed in ECN Magazine, May 2000 issue. The article addresses DSP-based motor control systems offering the control bandwidth required to make possible the development of advanced motor drive systems for domestic appliance applications.
Technical Articles PDF
Motion-Control ChipSets
(Analog Dialogue, Vol. 30, No. 2, 1996)
Analog Dialogue 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

AD2S99 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD2S99AP Status: Production 20 ld PLCC 20 Ind Tube, 49 $10.76 $7.57 N  Material Info PCN Purchase
AD2S99APZ Status: Production 20 ld PLCC 20 Comm. Tube, 49 $9.80 $6.90 Y  Material Info PCN Purchase
AD2S99BP Status: Production 20 ld PLCC 20 Ind Tube, 49 $12.32 $10.01 N  Material Info PCN Purchase
AD2S99BPZ Status: Production 20 ld PLCC 20 Ind Tube, 49 $11.78 $9.57 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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