Optically Isolated Sigma-Delta Modulator
ACPL-796J Optically Isolated Sigma-Delta Modulator
Data Sheet
Description
The ACPL-796J is a 1-bit, second-order sigma-...
Description
ACPL-796J Optically Isolated Sigma-Delta Modulator
Data Sheet
Description
The ACPL-796J is a 1-bit, second-order sigma-delta () modulator converts an analog input signal into a highspeed data stream with galvanic isolation based on optical coupling technology. The ACPL-796J operates from a 5 V power supply with dynamic range of 80 dB with an appropriate digital filter. The differential inputs of ±200 mV (full scale ±320 mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications such as motor phase current measurement.
The analog 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 20 MHz, and the data are encoded and transmitted across the isolation boundary where they are recovered and decode...
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