How do I start selecting a digital isolator?

Count the signals that must cross the barrier, set the isolation rating from the voltage difference and the standard, then choose the data rate and the package from the interface and the board. Those decisions narrow the selection quickly.

How many channels do I need?

Count the signals: two channels for a simple UART or an isolated CAN, four for an SPI bus or a group of control lines, and more for a wider interface. Choose a part with an integrated isolated DC-DC if the isolated side also needs power. Our FAE team can help choose the channel count.

Why is the CMTI important?

The common-mode transient immunity tells you how fast the grounds may move before the data is corrupted. In a motor drive or an inverter the grounds move quickly, so a high CMTI is what keeps the interface reliable. Read the isolation design notes for the layout.

Are the devices genuine and documented?

Every NOVOSENSE device BeiLuo ships is factory-traceable and includes an import declaration, a certificate of origin and a RoHS compliance file. Mainstream models are held in regional warehouses. Click a model for stock status, or request a quote for current lead time.

How do I start selecting an isolated amplifier?

Set the input range from the shunt voltage, choose the isolation rating from the voltage difference and the standard, and confirm the output, the supply and the grade. Those decisions narrow the selection quickly.

Which input range should I choose?

Choose the ±50 mV range for a small shunt voltage with a low loss, and the ±250 mV range for a larger shunt voltage with a better noise margin. Match the shunt and the range so the full current uses the input span without saturating. Our FAE team can help size the shunt.

How do I pick a gate driver?

Choose the drive current from the gate charge and the switching speed you need, and the UVLO level from the device you drive, then confirm the isolation and the package. A 5 A peak drive such as the NSi6801 suits a fast MOSFET, IGBT or SiC gate. Our FAE team can help with the gate drive.

How do I start selecting a current sensor?

Set the current range just above your maximum current, choose the integrated sensor or the shunt and amplifier from the design, then confirm the isolation, the accuracy and the package. Those decisions narrow the selection quickly.

Integrated sensor or sense amplifier?

Choose an integrated sensor such as the NSM2311 where the current is high and a low impedance and a high capacity matter, and a current sense amplifier such as the NSCSA240-Q where a shunt is used and a high accuracy with a good PWM transient rejection is needed. Our FAE team can help choose.

How much isolation do I need?

Confirm the isolation against the voltage at which the current is measured and the standard you must meet, because a high-side or a high-voltage measurement needs an isolated device with the creepage and the clearance to match. Our FAE team can help with the isolation.

What is capacitive isolation?

NOVOSENSE isolators pass the signal through a capacitive barrier with a radio-frequency carrier and an on-off-keying modulation, so there is no optical LED to age and the radiated emission is low. The barrier gives a high noise immunity and a high common-mode transient immunity. Read the notes for the layout rules.

How do I lay out across the barrier?

Provide the required creepage and clearance under the package, keep the signal traces short on both sides and do not run a trace across the barrier, because a single trace defeats the isolation. Use a ground plane on each side and decouple each side close to the supply pins. Our FAE team can review the layout.

What does the CMTI tell me?

The common-mode transient immunity is the rate of common-mode voltage change the isolator tolerates before the data is corrupted. A high CMTI keeps the interface reliable when the grounds move quickly, which is what a motor drive or an inverter imposes. Our FAE team can help check it against your application.

How do I verify the isolation?

Verify with a hipot test at the rated voltage, and confirm the creepage and the clearance against the standard. Measure the common-mode rejection and the data integrity at the worst-case rate and common-mode step on the bench before you release the design. Our FAE team can help interpret the results.

What is the standout feature of the NOVOSENSE range?

The standout feature is the capacitive isolation platform that runs across the digital isolators, the isolated amplifiers, the gate drivers and the sensors, so one supplier covers the whole isolation chain with a consistent technology, a high CMTI and automotive options. The main design care points are the layout and the creepage.

How do the digital isolators perform?

In practice the NOVOSENSE isolators pass a fast interface across the barrier with a clean signal and a high CMTI, and the low radiated emission suits a dense, fast-switching board. On the bench the data integrity held at the rated rate and at a large common-mode step. Confirm the channel count and the isolation.

How do the amplifiers and sensors perform?

The isolated amplifiers measure a high-side current accurately with the differential output and the high CMTI, and the current sense family rejects the PWM transient that a switching stage imposes. The integrated sensor gives a low impedance and a high current capacity. Our FAE team can review the sense design.

Can I get samples to evaluate?

Yes. We provide samples of the NOVOSENSE isolators, amplifiers and sensors for your own isolation, CMTI and accuracy testing, with documentation included and FAE support during bring-up. Request a sample and we will confirm stock and lead time.

Technical Support | NOVOSENSE Expertise | BeiLuo

Guides, application notes and reviews from BeiLuo's FAE team covering NOVOSENSE digital isolators, isolated amplifiers and current sensors in detail now.

Guides 3 Application Notes 1 Troubleshooting 0 Reviews 1

How to Select a NOVOSENSE Digital Isolator

2026-07-26 - Guides - By Liu Wei

Compare NOVOSENSE digital isolators by channel count, isolation rating, data rate, supply and package for isolated interfaces and control designs today.

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How to Select a NOVOSENSE Isolated Amplifier

2026-07-21 - Guides - By Chen Hao

A practical method for selecting NOVOSENSE isolated amplifiers and gate drivers by input range, isolation, drive and package for power designs and more today.

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How to Select a NOVOSENSE Current Sensor

2026-07-16 - Guides - By Zhang Min

Compare NOVOSENSE integrated current sensors and current sense amplifiers by range, isolation, accuracy and PWM transient rejection for power designs.

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NOVOSENSE Isolation Design Notes

2026-07-09 - Application Notes - By Zhang Min

Capacitive isolation, common-mode transient immunity, layout and creepage guidance for applying NOVOSENSE isolators and amplifiers on a real product board.

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NOVOSENSE Isolator and Sensor Review

2026-06-30 - Reviews - By Liu Wei

A hands-on review of NOVOSENSE digital isolators, isolated amplifiers and current sensors for power designs, covering isolation and accuracy in real systems.

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Meet Our FAE Team

Liu Wei

Senior FAE Engineer, Isolation

Digital IsolatorsCMTIInterfaces

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Chen Hao

FAE Engineer, Drivers and Amplifiers

Gate DriversIsolated AmpsMotor Drive

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Zhang Min

FAE Engineer, Current Sensing

Current SensorsPWM RejectionAccuracy

Author profile