AD698APZ

The AD698APZ is a high-performance, monolithic Linear Variable Differential Transformer (LVDT) signal conditioning subsystem manufactured by Analog Devices. This device is designed to interface with LVDTs and convert their mechanical position into a unipolar or bipolar DC voltage with a high degree of accuracy and repeatability.

The AD698APZ offers a complete solution for LVDT signal conditioning, with all active circuits integrated onto a single monolithic chip. This eliminates the need for multiple discrete components, simplifying the design and reducing the overall footprint of the system.

Key features of the AD698APZ include:

• A built-in low distortion sine wave oscillator to drive the LVDT primary.
• Two synchronous demodulation channels to detect the primary and secondary amplitudes.
• A unique ratiometric architecture that eliminates scale factor errors due to drift in the amplitude of the primary drive, improving temperature performance and stability.
• The ability to operate with half-bridge LVDTs, LVDTs connected in the series opposed configuration (4-wire), and RVDTs.
• A wide range of input and output voltages and frequencies, with the excitation frequency determined by a single external capacitor.
• The provision of up to 24 volts rms to differentially drive the LVDT primary, and meeting its specifications with input levels as low as 100 millivolts rms.

In addition, the AD698APZ is available in a 28-pin PLCC package and operates over a temperature range of -40°C to +85°C. This makes it suitable for a variety of industrial and automotive applications where high accuracy and reliability are required.

Overall, the AD698APZ is a versatile and reliable LVDT signal conditioning subsystem that offers excellent performance and ease of use.