Isolated Current Sampling Amplifier With High Reliability and Extra-Wide Body
NSI1311-DSWWAR is a high-performance extra-wide body isolation amplifier based on NOVOSENSE capacitive isolation technology, with output and input separation. The single-ended input signal range of the device is 0.02V to 2V. The high input impedance of NSI1311 makes it ideal for connection to high-voltage resistor dividers or other voltage signal sources with high output impedance. The device has a fixed gain of 1 and provides differential analog output. Low offset and gain drift ensure accuracy over the entire temperature range. The high common-mode transient immunity (CMTI) ensures that the device can provide accurate and reliable measurement results even in the presence of high-power switches (such as in motor control applications). The fault-safe function (high-side power supply voltage missing detection function) simplifies system design and diagnosis.
Product Features
• Up to 7500Vrms insulation voltage
• 0.02~ 2V linear input voltage range
• Fixed Gain: 1
• Low bias error and temperature drift: ± 1.5mV (Max), -25μV/℃ (Max)
• Low gain error and temperature drift: ± 0.3% (Max), ± 45ppm/℃ (Max)
• Low non-linearity and temperature drift: ± 0.05% (Max) for 0.02V~ 0.1VVIN, ± 0.04% (Max) for 0.1V~ 2VVIN, ± 1ppm/℃ (Typ)
• SNR: 82dB (Typ, BW=10kHz), 70dB (Typ, BW=100kHz)
• Bandwidth: 400kHz (Typ)
• High CMTI: 150kV/μs (Typ)
• System-level diagnostic capabilities: VDD1 monitoring
• Operating temperature: -40℃~125℃
• RoHS-compliant packaging: SOP8 (600mil)
Safety Certificate
• UL recognition: up to 7500Vrms for 1 minute per UL1577
• CQC certification per GB4943.1
• CSA component notice 5A
• DIN VDE V 0884-17
Application
• Bus voltage monitoring
• AC motor control
• Power and solar inverters
• Uninterruptible power supply
• Automotive onboard chargers
Functional Block Diagram
All Resources
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