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High Speed, Reinforced/Basic Isolated Window Comparator

NSI22C12 is a high-speed isolated comparator with output separated from input based on the NOVOSENSE capacitive isolation technology Adaptive OOK®. The NSI22C12 is an isolated window comparator with open-drain output and latch enable function. The short response time of NSI22C12 makes it highly suitable for over-voltage or over-current protection application. The high common-mode transient immunity ensures that the device is able to provide accurate protection even in the presence of high-power switching such as in motor control applications.NSI22C12 have an adjustable input reference threshold of 20mV~320mV and the window threshold is from ±20mV to ±320mV. The reference can be set by an external voltage source or the 100μA internal current source flowing through an external resistor. The fail-safe function (missing VDD1 detection) simplifies system-level design and diagnostics.

Product Features

Up to 5000Vrms Insulation Voltage

3.1V to 27V wide input side power supply

Adjustable input reference threshold: ±20mV to ±320mV 

Analog input voltage range: ±0.4V

Internal threshold reference: 100μA ±1.5% error (Max)

Accurate trigger threshold: ±1% error (Max)

Fast propagation time: 250ns (Max)

High CMTI: 150kV/μs (Typ)

System-Level Diagnostic Features: VDD1 monitoring

Operation Temperature: -40°C~125°C

RoHS-Compliant Packages: SOW8 wide body (SOP8 300mil)

Safety Certificate

UL recognition: 5000Vrms for 1 minute per UL1577

CQC certification per GB4943.1-2011

CSA component notice 5A 

DIN EN IEC 60747-17 (VDE 0884-17)


AC motor controls

Power and solar inverters

Uninterruptible Power Suppliers

DC/DC converters

Functional Block Diagram


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Personal Electronics
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