AD2S99
FEATURES
Programmable Sinusoidal Oscillator Synthesized Synchronous Reference Output Programmable Output Frequency Range: 2 k Hz- 20 k Hz “Loss-of-Signal” Indicator 20-Pin PLCC Package Low Cost APPLICATIONS Excitation Source for: Resolvers Synchros LVDTs RVDTs Pressure Transducers Load Cells AC Bridges
FBIAS SEL1 SEL2 FREQUENCY SELECT
Programmable Oscillator AD2S99
FUNCTIONAL BLOCK DIAGRAM
PUSH/ PULL O/P STAGE EXC EXC TO TRANSDUCER
SINE WAVE GENERATOR SYNREF SYNCHRONOUS REFERENCE LOS
PHASE DETECT LOGIC
FROM TRANSDUCER
GENERAL DESCRIPTION
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 pensates for temperature and cabling...
