Overview
The AD698APZ is a linear variable differential transformer (LVDT) signal conditioner designed for precision position and displacement measurement systems.
It is widely used in industrial automation, motion control equipment, and aerospace instrumentation, where high accuracy, stable excitation, and reliable demodulation are required.
This device integrates excitation, amplification, and synchronous demodulation, significantly simplifying LVDT and RVDT signal processing.
Core Parameters
| Parameter | Specification |
|---|---|
| Device Type | LVDT / RVDT Signal Conditioner |
| Excitation Frequency Range | 1 kHz to 20 kHz |
| Excitation Output | Sine wave |
| Input Type | Differential LVDT / RVDT |
| Demodulation | Synchronous |
| Linearity | High linearity over full range |
| Supply Voltage | Dual supply operation |
| Operating Temperature | -40°C to +85°C |
| Output Type | DC voltage proportional to position |
| Package | Plastic DIP (APZ) |
These parameters make the device suitable for high-precision position sensing, especially where signal stability and accuracy over temperature are critical.
Features
- Integrated oscillator for LVDT excitation
- Precision synchronous demodulator
- High common-mode noise rejection
- Minimal external component requirement
- Excellent linearity and repeatability
- Suitable for both LVDT and RVDT sensors
Typical Application Scenarios
- Industrial position and displacement measurement
- Motion control and servo systems
- Aerospace and defense instrumentation
- Valve position feedback systems
- Robotics and automation equipment
The AD698APZ is often paired with the LT1990CS8#PBF instrumentation amplifier, which conditions and amplifies resolver sensor signals before demodulation, improving accuracy and noise performance in high-precision position sensing systems.
Performance Comparison
| Feature | AD698APZ | Discrete Signal Chain | Digital Resolver IC |
|---|---|---|---|
| Integration Level | High | Low | High |
| Linearity | Excellent | Moderate | Excellent |
| Design Complexity | Low | High | Medium |
| Noise Immunity | High | Medium | High |
| Analog Output | Yes | Yes | Often No |
Compared with discrete LVDT signal chains, the AD698APZ delivers simpler design, better stability, and consistent performance, while maintaining direct analog output preferred in many control systems.
Conclusion
The AD698APZ is a proven and reliable solution for LVDT and RVDT signal conditioning in demanding position sensing applications. Its high level of integration, precision demodulation, and robust performance make it ideal for industrial, aerospace, and motion control systems requiring accurate and stable displacement measurement.
Manufacturer Profile
Analog Devices, Inc. (ADI) is a global leader in high-performance analog and mixed-signal solutions. ADI is renowned for its precision signal conditioning, sensor interface ICs, and long-term product support across industrial, aerospace, and instrumentation markets.
FAQ
Q1: What sensors are compatible with AD698APZ?
It supports both LVDT and RVDT sensors.
Q2: Does AD698APZ require an external excitation source?
No. It includes an integrated oscillator to generate the excitation signal.
Q3: Is the output directly usable by control systems?
Yes. It provides an analog DC output proportional to displacement.
Q4: Is AD698APZ suitable for harsh industrial environments?
Yes. It offers high noise immunity and stable operation over temperature.
Q5: How can I verify the quality of this product?
7SEtronic follows a standardized and comprehensive quality inspection SOP. Each product can be verified through multiple checks, including visual inspection and X-ray analysis, providing reliable quality assurance for your reference.
For more information and to review our available inventory, please contact our team for detailed pricing, current stock levels, and any additional technical support you may need.
You can find more component guides and application notes in our Component Technical Guides section: