ADuM7701 16-Bit, Isolated Sigma-Delta Modulators Analog Devices ADuM7701 16-Bit, Isolated Sigma-Delta (ΣΔ) Modulators convert an analog input signal into a high-speed, single-bit data stream with on-chip digital isolation based on iCoupler technology. The ADuM7701 modulators operate from a 5V (VDD1) power supply and accept a pseudo-differential input signal of ±250mV (±320mV full scale). The pseudo-differential input is ideally suited to shunt voltage monitoring in high-voltage applications requiring galvanic isolation.