ELECTRONIC SENSORS
correction mechanisms and resistance to electromagnetic interference (EMI). Communication protocols such as RS-485 and CAN (Controller Area Network) are often used for this, providing high-speed data exchange and fault tolerance. Hall effect sensors must therefore easily integrate with digital control systems to make reliable and instantaneous communication possible with the other components in the system. Isolation is also an important factor to protect sensitive electronic components from high voltages and transient surges. Isolation techniques ensure that electrical noise and surges do not propagate through the control system, which could cause malfunctions or damage.
High isolation voltage, low capacitance and high common-mode transient for isolation components. Digital isolators and isolated transceivers play a key role in maintaining signal integrity and protecting the system.
Fully integrated high isolation current sensor solutions
NOVOSENSE Microelectronics offers a range way to connect and protect the components of industrial control systems. The NSM201x series of Hall effect sensors, comprised of the NSM2015, NSM2016, and NSM2019, can be used in conjunction with NOVOSENSE’s digital isolators, RS-485 transceivers and CAN transceivers that ensure reliable communication and isolation.
Figure 3: NSM2016 functional block diagram “
For communication to be reliable and effective, connected components should support high data transfer rates, robust error detection and correction mechanisms and resistance to electromagnetic interference (EMI).
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Figure 2: The new NSM201X series of integrated circuit Hall sensors is suitable for a variety of isolated current sampling occasions in industrial control.
NSM201x series sensors convert current up to ±200 A into a linear voltage output making them ideal for isolated current sampling. The series is designed to replace shunt resistors, and voltage isolators, especially in
space-restricted applications that would solutions. These fully integrated compact packages effectively reduce the footprint on the board and the overall cost of current detection solutions.
The NSM201x series combines high precision and reliability with high sensitivity, low offset error and excellent linearity, allowing for a reduced overall output error, limited to a maximum of ±1.5 percent across
the operating temperature range. They also offer high isolation and compatibility, with wide-body 16-pin versions supporting an isolated operating voltage of over 1550 Vpk and a surge insulation withstand of over 10 kV. The narrow-body 8-pin versions support 600 Vpk, with a surge insulation withstand of over 6 kV. They feature low conduction impedance, with the wide-body version at 0.85 mOhm and the narrow-body version at 1.2 mOhm. The series is compatible with mainstream Hall current sensors, supporting 5 V and 3.3 V power supplies, and is available in a variety of voltage input/output versions to meet diverse application needs.
The NSM201x series of high-performance sensors can be used in conjunction with digital isolators, which can enhance current sensing accuracy and ensure safe data transmission. The NOVOSENSE NSIP88/89xx-EVM series are a range of 2- or 4-channel digital isolators with an integrated 500 mW DC to DC converter, offering up to 5000 Vrms insulation voltage and high CMTI of 150 kV/μs. Similarly, the NSIP83086-EVM RS-485 and NSIP1042-EVM CAN transceivers with integrated DC to DC converters can facilitate fast and reliable communication of data in complex industrial systems. Hall effect sensors, along with digital isolators and transceivers, can create a powerful toolkit to meet the demands of modern industrial control. These integrated solutions simplify system design, reduce the need for additional components and enhance overall system performance and reliability, ensuring that industrial systems the most demanding environments.
SEPTEMBER 2024 | ELECTRONICS FOR ENGINEERS 31
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