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The NSI1303M22 is a high performance Σ-Δ modulator with output separated from input based on the NOVOSENSE capacitive isolation technology. The device has a linear differential input signal range of ±250mV (±320mV full-scale). The differential input is ideally suited to shunt resistor-based current sensing in high voltage applications where isolation is required. The analog input is amplified and continuously sampled by a second-order Σ-Δ modulator and converted to a high speed, single bit data stream. The output bit-stream of the NSI1303M22 is synchronized to the internally generated clock. NSI1303 can achieve 16 bits resolution and an 85dB (typ) signal to noise ratio (SNR) at 78.125kSPS by using an appropriate digital filter (such as sinc3 filter) to decimate the bitstream from 20MHz internal sampling clock. The fail-safe functions including input common-mode overvoltage detection and missing AVDD detection simplify system-level design and diagnostics.
• Up to 5000Vrms Insulation Voltage
• 20MHz internal clock frequency
• ±250mV Linear Input Voltage Range
• Excellent DC Performance:
• Offset Error: ±100μV (Max)
• Offset Drift: ±1μV/℃ (Max)
• Gain Error: ±0.2% (Max)
• Gain Drift: ±40ppm/℃ (Max)
• High CMTI: 150kV/μs (Typ)
• System-Level Diagnostic Features: AVDD monitoring; Input common-mode overvoltage detection
• Operation Temperature: -40℃~125℃
• RoHS-Compliant Packages: SOP8 (300mil)
• UL recognition per UL1577
• CQC certification per GB4943.1
• CSA component notice 5A
• DIN EN IEC 60747-17 (VDE 0884-17)
• Shunt Current Monitoring
• AC Motor Controls
• Uninterruptible Power Suppliers
• Automotive Onboard Chargers
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