DESCRIPTION
The Broadcom® ACPL-C740 is a 1-bit, second-order sigmadelta (-) modulator that converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The analog input is continuously sampled by a means of sigma-delta over-sampling using an onboard clock. The signal information is contained in the modulator data, as a density of ones with data rate of 20 MHz, and the data are encoded and transmitted across the isolation boundary where they are recovered and decoded into high-speed data stream of digital ones and zeros. The original signal information can be reconstructed with a digital filter. The serial interface for data and clock has a wide supply range of 3V to 5.5V. Combined with superior optical-coupling technology, the modulator delivers high noise margins and excellent immunity against isolation-mode transients. With 0.5-mm minimum distance through insulation (DTI), the ACPL-C740 provides reliable reinforced insulation and high working insulation voltage, which is suitable for fail-safe designs.
Broadcom
