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The automotive isolation amplifier uses Σ-Δ architecture where the differential analog input is converted into digital pulses to be transmitted optically across the insulation barrier. The isolation amplifier allows designers to sense current/voltage in extremely moisy environments while maintaining excellent gain and offset accuracy. It exhibits outstanding stability over both time and temperature, as well as unequaled common-mode transient noise rejection (CMR). The small input voltage range helps minimize power dissipation in the current-sensing resistor (current shunt), thus making it suitabole for many voltage-sensing automotive applications. Avago R²Coupler provides with reinforced insulation and reliability that delivers safe signal isolation critical in automotive and high temperature industrial applications.