Product

Product

High Reliability Reinforced Isolated Sigma-Delta Modulator with LVDS Interface

The NSI1306L25 is a high reliability reinforced isolated Σ-Δ modulator with LVDS digital interface. The device has a linear differential input signal range of ±250mV. 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. Both the input clock and the output data are LVDS interface conformed to TIA/EIA-644-A LVDS Standard. The output data is synchronous to the external clock with a frequency range from 5MHz to 21MHz. By using an appropriate digital filter (such as sinc3 filter) to decimate the bitstream, the device can achieve 16 bits resolution and an 86dB/82.5dB signal to noise ratio (SNR) at 78.125kSPS with a 20MHz master clock. The fail-safe functions including input common-mode overvoltage detection and missing AVDD detection simplify system-level design and diagnostics.

Product Features

• Up to 5000VRMS Insulation Voltage

• Clock frequency: 5MHz to 21MHz

• ±250mV Linear Input Voltage Range

• Low voltage differential signaling interface

• Excellent DC Performance:

◦ Offset Error: ±100μV (Max)

◦ Offset Drift: -1.3~1.3μV/°C (Max)

◦ Gain Error: ±0.2% (Max)

◦ Gain Drift: ±40ppm/°C (Max)

• SNR: 86dB (Typ)

• High CMTI: 150kV/μs (Typ)

• Conforms to TIA/EIA-644-A LVDS Standard

• System-Level Diagnostic Features:

◦ AVDD monitoring

◦ Input common-mode overvoltage detection

• Operation Temperature: -40°C~125°C

• RoHS-Compliant Package: SOP16(300mil)

Safety Certificate

• UL recognition: up to 5000Vrms for 1 minute per UL1577

• CQC certification per GB4943.1-2011

• CSA component notice 5A

• DIN EN IEC 60747-17 (VDE 0884-17)

Application

• Industrial Motor Drives

• Power and solar inverters

• Uninterruptible Power Suppliers

Functional Block Diagram

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For more product information, please contact us.