CN0532: IEPE-Compatible Interface for Wideband MEMS Accelerometer Sensors
Reference design for an IEPE-compatible interface using the ADXL1002 MEMS accelerometer for high-bandwidth, low-noise industrial vibration monitoring.
Overview
The CN0532 is a reference design from Analog Devices that implements an Integrated Electronics Piezoelectric (IEPE) compatible interface for wideband MEMS accelerometers. The circuit uses the ADXL1002 ultralow noise MEMS accelerometer and an AD8541 rail-to-rail amplifier to convert standard 3-wire sensor outputs into a 2-wire IEPE protocol. It operates at a 12.5 V bias with 4 mA current consumption, providing a direct replacement for traditional piezoelectric sensors in vibration monitoring ecosystems. This design allows for high-bandwidth (11 kHz) sensing with superior thermal stability, shock recovery, and DC-to-low frequency response compared to legacy piezoelectric solutions.
Use Cases
- Condition-based monitoring (CbM) for industrial equipment
- Predictive maintenance for rotating machinery
- Industrial vibration sensing and diagnostics
- Replacement of traditional piezoelectric sensors in legacy IEPE systems
- Structural health monitoring
Topics
Referenced Parts
ADXL1002
Analog Devices
ADXL1002 Low Noise, High Frequency MEMS Accelerometer
TL432B
Analog Devices
The minimum cathode current of the IC4 (TL432B) is 1 mA (maximum).
TLVH432
Analog Devices
Figure 1. Complete ADXL1002 with IEPE Compatible Circuit Diagram labels IC1 and IC4 as TLVH432.
353C23
PCB Piezotronics
The reference sensor in this case is a piezoelectric sensor (Model 353C23)
| AD8541 | Analog Devices | AD8541 General-Purpose CMOS Single Rail-to-Rail Amplifier |
| ADXL1002 | Analog Devices | ADXL1002 Low Noise, High Frequency MEMS Accelerometer |
| TL432B | Analog Devices | The minimum cathode current of the IC4 (TL432B) is 1 mA (maximum). |
| TLVH432 | Analog Devices | Figure 1. Complete ADXL1002 with IEPE Compatible Circuit Diagram labels IC1 and IC4 as TLVH432. |
| 353C23 | PCB Piezotronics | The reference sensor in this case is a piezoelectric sensor (Model 353C23) |