Product Details
●The AD598 is a complete, monolithic Linear Variable Differential Transformer (LVDT) signal conditioning subsystem. It is used in conjunction with LVDTs to convert transducer mechanical position to a unipolar or bipolar dc voltage with a high degree of accuracy and repeatability. All circuit functions are included on the chip. With the addition of a few external passive components to set frequency and gain, the AD598 converts the raw LVDT secondary output to a scaled dc signal. The device can also be used with RVDT transducers.
●The AD598 contains a low distortion sine wave oscillator to drive the LVDT primary. The LVDT secondary output consists of two sine waves that drive the AD598 directly. The AD598 operates upon the two signals, dividing their difference by their sum, producing a scaled unipolar or bipolar dc output.
●The AD598 uses a unique ratiometric architecture (patent pending) to eliminate several of the disadvantages associated with traditional approaches to LVDT interfacing. The benefits of this new circuit are: no adjustments are necessary, transformer null voltage and primary to secondary phase shift does not affect system accuracy, temperature stability is improved, and transducer interchangeability is improved.
●### Features and Benefits
● Single Chip Solution, Contains Internal Oscillator and Voltage Reference
● No Adjustments Required
● Insensitive to Transducer Null Voltage
● Insensitive to Primary to Secondary Phase Shifts
● DC Output Proportional to Position
● 20 Hz to 20 kHz Frequency Range
● Single or Dual Supply Operation
● Unipolar or Bipolar Output
● Will Operate a Remote LVDT at Up to 300 Feet
● Position Output Can Drive Up to 1000 Feet of Cable
● Will Also Interface to an RVDT
● Outstanding Performance
●Linearity: 0.05% of FS max
●Output Voltage: ±11 V min
●Gain Drift: 50 ppm/°C of FS max
●Offset Drift: 50 ppm/°C of FS max
