AD698APZ

The AD698APZ is a complete, monolithic Linear Variable Differential Transformer (LVDT) signal conditioning subsystem from Analog Devices. It converts mechanical position to a unipolar or bipolar DC voltage with high accuracy and repeatability. The device includes an internal oscillator, voltage reference, and synchronous demodulation channels, requiring only a few external passive components to set frequency and gain. Key specifications include a frequency range of 20 Hz to 20 kHz, typical linearity of 0.05%, gain drift of 20 ppm/°C, and offset drift of 5 ppm/°C. The supply current is 15 mA. The output type is voltage. The AD698APZ is housed in a 28-PLCC (11.51x11.51 mm) surface mount package with J-Lead terminations. It operates over a temperature range of -40°C to 85°C. The device interfaces to half-bridge, 4-wire LVDTs, and can also decode AC bridge signals. It is designed for applications requiring precise position measurement, such as industrial automation, aerospace, and instrumentation.