SMAJ54CA
Bourns
±8 kV IEC ESD contact discharge pulse applied to the input of an ADG5412F with a 54 V TVS (Bourns SMAJ54CA)
Application NoteAnalog
Solving IEC System Protection for Analog Inputs Using the ADG5412F
Technical guide on implementing IEC 61000-4 compliant protection for analog inputs using the ADG5412F fault-protected switch and transient voltage suppressors.
Overview
This application note details the design of protection architectures for analog inputs to meet IEC 61000-4 standards for electrostatic discharge (ESD), electrical fast transients (EFT), and surge events. It focuses on the use of Analog Devices ADG5412F and ADG5208F fault-protected switches, which provide up to ±55V overvoltage protection (OVP) and power-off protection. The document introduces the 'TVS design window' concept, demonstrating how these switches, when combined with a transient voltage suppressor (such as the Bourns SMAJ54CA) and a low-value resistor, can achieve robustness levels up to 16 kV IEC ESD, 4 kV EFT, and 4 kV surge. It explains how the integrated fault detection and bidirectional ESD cells in the switches reduce downstream protection requirements and maintain high analog performance.
Use Cases
- Industrial automation systems
- Analog input modules
- Sensor interface protection
- Harsh environment electronics
- Process control instrumentation
Topics
ADG5412F
ADG5208F
SMAJ54CA
IEC 61000-4-2
IEC 61000-4-4
IEC 61000-4-5
overvoltage protection
ESD protection
surge immunity
latch-up immunity
analog input protection
transient voltage suppressor
Referenced Parts
ADG5208F
Analog Devices
Analog Devices portfolio of robust, fault protected switches and multiplexers (ADG5208F and ADG5412F)
| SMAJ54CA | Bourns | ±8 kV IEC ESD contact discharge pulse applied to the input of an ADG5412F with a 54 V TVS (Bourns SMAJ54CA) |
| SMAJ54CA | Bourns | input of an ADG5412F with a 54 V TVS (Bourns SMAJ54CA) |
| ADG5208F | Analog Devices | Analog Devices portfolio of robust, fault protected switches and multiplexers (ADG5208F and ADG5412F) |
| ADG5412F | Analog Devices | Solving IEC System Protection for Analog Inputs Using the ADG5412F |