器件名称:
AD2S99BP
功能描述:
Programmable Oscillator
文件大小:
317.54KB 共8页
简 介:
a FEATURES 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 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 AD2S99 PHASE DETECT LOGIC SIN COS 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 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 –40°C to +85°C. PRODUCT HIGHLIGHTS Dynamic Phase Compensation The AD2S99 dynamically compensates for any phase variation in a transducer by phase locking its synchronous referen……
