PRODUCT DESCRIPTION

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.

FEATURES

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: 611 V min

Gain Drift: 50 ppm/8C of FS max

Offset Drift: 50 ppm/8C of FS max