New high-reliability isolation amplifiers for precision applications

Vishay Intertechnology, Inc. has released its latest isolation amplifiers, the VIA0050DD, VIA0250DD, and VIA2000SD. These new devices deliver improved performance for a wide range of industrial, automotive, and medical applications, where high precision, reliability, and compact size are critical.

The VIA series of isolation amplifiers are developed to deliver outstanding thermal stability and precise measurement capabilities. With a typical CMTI of 150kV/μs, these amplifiers deliver robust performance even in harsh environments, such as heavy-duty motor applications. The low typical gain error of ±0.05% and minimal gain drift of 15ppm/C typical ensure calibration-free, precise measurements over time and temperature. Further, these devices offer a high bandwidth of 400kHz, enabling faster measurements compared to traditional opto-based isolation amplifiers.

Each amplifier in this series also features low offset error and drift, reinforced isolation, and inbuilt diagnostics for simplified precision current and voltage measurements. The inbuilt common mode voltage detection prevents failures in current and voltage measurement applications, making these amplifiers particularly ideal for demanding applications where reliability is paramount. This series is created to be compatible with the company's WSBE low TCR and high power shunts, ensuring superior performance across a wide temperature range from -40C to +125C.

The VIA0050DD is a capacitive isolation amplifier optimised for environments where space is at a premium and low power consumption is essential. It features a high CMTI) of 100kV/μs minimum, ensuring reliable performance even in noisy environments. Its low differential input voltage of ±50mV makes it excellent for precision isolated current measurements in space-constrained applications, such as power inverters, battery energy storage systems, motor phase current sensing, and industrial motor controls. Similarly, with its wide differential input voltage of ±250mV, the VIA0250DD allows for isolated current and voltage measurements.

The VIA2000SD offers the highest SNR and bandwidth among the three models, making it the ideal choice for transmitting high-fidelity signals in complex environments. Its linear differential input voltage – in the range of 0.02V to 2V – allows for precise isolated voltage measurements for applications such as bus voltage monitoring and UPS.

The VIA series isolation amplifiers are designed to deliver reliable and accurate performance across various applications, including bus voltage monitoring, AC motor controls, power and solar inverters, and UPS systems. These amplifiers ensure accurate measurements across high-voltage potential dividers and precision shunts, provide ease of monitoring for industrial motor drives, provide robust performance in renewable energy systems, and maintain signal integrity in critical power systems.

Samples and production quantities of the VIA0050DD, VIA0250DD, and VIA2000SD are available now.