ACPL-C799 Datasheet (data sheet) PDF





ACPL-C799 Datasheet, Sigma-Delta Modulator

ACPL-C799   ACPL-C799  

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ACPL-C799 Optically Isolated ±50 mV Sig ma-Delta Modulator Data Sheet Descript ion The Avago Technologies’ ACPL-C799 is a 1-bit, second-order sigma-delta ( -) modulator converts an analog i nput signal into a high-speed data stre am with galvanic isolation based on opt ical coupling technology. The ACPL-C799 operates from a 5V power supply with d ynamic range of 77 dB with an appropria te digital filter. The differential inp uts of ±50 mV (full scale ±80 mV) are ideal for direct connection to shunt r esistors or other low-level signal sour ces in applications, such as motor phas e current measurement. The analog input is continuously sampled by a mean

ACPL-C799 Datasheet, Sigma-Delta Modulator

ACPL-C799   ACPL-C799  
s of sigma-delta over-sampling using an on-board clock. The signal information is contained in the modulator data, as a density of ones with data rate of 10 MHz, and the data are encoded and trans mitted across the isolation boundary wh ere they are recovered and decoded into high-speed data stream of digital ones and zeros. The original signal informa tion can be reconstructed with a digita l filter. The serial interface for data and clock has a wide supply range of 3 V to 5.5V. Combined with superior optic al coupling technology, the modulator d elivers high noise margins and excellen t immunity against isolation-mode trans ients. With 0.5 mm minimum distance thr ough insulation (DTI), the ACPL-C799 pr ovides reliable reinforced insulation a nd high working insulation voltage, whi ch is suitable for fail-safe designs. T his outstanding isolation performance i s superior to alternatives including de vices based on capacitive- or magnetic- coupling with DTI in micro-meter range. Offered in a Stretched SO-8 (SSO-8) pa ckage, the isolated ADC delivers the re liability, small size, superior isolati on and over-temperature performance mot or drive designers need to accurately m easure current at much lower price comp ared to traditional current transducers . Features  10-MHz internal clock  1-bit, second








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