Voltage-sensing solutions

High-voltage resistors integrate the high-voltage resistor ladder into our isolated amplifier and modulator devices.

Benefits:

• Saves system-level costs and reduces solution size up to 50% by removing the need for as many as 15 external high-voltage resistors.
• Saves manufacturing time and costs by eliminating the need for system-level calibration.
• Features very low temperature and lifetime drift compared to discrete resistors, enabling designers to achieve voltage measurements with accuracy error <1% without the calibration that external resistors require.

Our portfolio includes isolated amplifiers and modulators with a fully integrated, isolated DC/DC converter that enables single-supply operation from the low-side of the device.

Benefits:

• Measuring non-ground referenced signals such as phase-to-phase measurements creates a novel solution for noisy space-constrained applications.
• Removing the external high-side supply helps simplify designs and reduces board space.

Our isolated voltage-sensing devices have two single-ended output options: fixed gain and ratiometric (variable) gain.

Benefits:

• Fixed-gain and ratiometric single-ended output devices integrate the differenitial to single-ended operational amplifier to reduce solution size and system costs, enabling direct interface with the MCU.
• Ratiometric single-ended output devices can vary the output swing of the isolated voltage-sensing amplifier to match the swing of the analog-to-digital converter (ADC) inside the MCU, increasing measurment resolution and allowing for the full use of the ADC's dynamic range.

Our differential-output isolated voltage-sensing amplifiers provide:

• High signal integrity in noisy environments.
• High common-mode transient immunity for reliable operation.
• Multisource solutions.

Our isolated voltage-sensing devices are availabe in three different isolation ratings: functional, basic and reinforced.

Benefits:

• Functional isolation devices support 1mm of creepage and clearance and a 200V_RMS working voltage.
• Basic isolation devices support 4mm creepage and clearance and a 800V_RMS working voltage.
• Reinforced isolation devices support 8.5mm creepage and clearance and 1,500_VRMS working voltage.
• Wide-body package reinforced isolation devices support 15.7mm creepage and 14.7mm clearance with a 2,000V_RMS working voltage.

Our integrated circuit-packaged high-voltage resistor dividers enable precise attenuation of high voltages, allowing safe implementation with low-voltage components downstream.

Single-chip attenuation reduces overall solution size and improves accuracy with a specified maximum ratiometric drift and fewer points of exposure, resulting in reduced board-level leakage compared to chains of individual resistors. Our precision-matched resistor portfolio also includes networks for creating discrete differential amplifiers, ensuring high precision in differential to single-ended conversions.

Single-ended voltage sensing involves measuring a voltage signal relative to a common ground reference. It offers a straightforward way to buffer or amplify a signal with minimal complexity. Our amplifiers are designed for accurate and reliable single-ended voltage sensing in both high-precision and cost-sensitive applications.

Our difference amplifiers enable differential input to single-ended output conversion in high-voltage precision sensing applications by supporting a wide common-mode range of up to ±275V and unity-gain operation. These amplifiers achieve accurate performance with low gain error and high common-mode rejection by integrating thin-film precision resistors and proprietary e-Trim™ technology.

Reduce system size and cost while maintaining high performance. Our digital power monitors can measure voltage, current, power, energy and charge in a single-chip solution. The portfolio includes versions with alert functionality, the ability to conduct multidecade current sensing from 1,000A to 100mA, or an integrated shunt using our EZShunt™ technology.

Our power metrology analog-to-digital converters (ADCs) support accurate and simultaneous sampling of multiple channels, while offering wide dynamic range and low power.

Voltage sensing for protection helps safeguard voltage measurement systems from potential damage and inaccuracies. It includes overvoltage protection to manage excessive voltage levels, undervoltage protection to maintain system reliability during voltage drops, and transient protection to shield against fast spikes or surges.

Our portfolio includes high-speed amplifiers, comparators and amplifiers with integrated references, offering rapid response and precise measurement capabilities for demanding applications.