ACPL-798J-000E

The ACPL-798J-000E is a 1-channel 16-pin surface-mount optically isolated Sigma-Delta Modulator with LVDS clock and data interface. The 1-bit second-order sigma-delta modulator that oversamples an analogue input signal into a high speed data stream with galvanic isolation based on optical coupling technology. It operates from a 5V power supply with dynamic range of 82dB with an appropriate digital filter. The differential inputs of ±200mV (full scale ±320mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications such as motor phase current measurement. The analogue input is continuously sampled by means of sigma-delta over-sampling using external clock, coupled across the isolation barrier, which allows synchronous operation with any digital controller. The signal information is contained in the modulator data, as a density of ones with data rate up to 25MHz. The original signal information can be reconstructed with a digital filter.

• 75dB Typical SNDR
• 3.5mV/°C Maximum offset drift
• ±1% Maximum gain error
• ±200mV Linear range with single 5V supply
• 25kV/µs Common-mode transient immunity