The ADuM7703 continuously samples the analog input via a high-performance analog modulator, and converts it to a single-bit digital output stream with a data rate of up to 21MHz. The original information can be reconstructed with an appropriate sinc3 digital filter to achieve an 86dB Signal-to-Noise Ratio (SNR) at 78.1kSPS with a 256 decimation rate and a 20MHz master clock. The serial input and output operates from a 5V or a 3.3V supply (VDD2).
The serial interface is digitally isolated. High-speed complementary metal-oxide semiconductor (CMOS) technology, combined with monolithic transformer technology, results in the on-chip isolation providing outstanding performance characteristics, superior to alternatives such as optocoupler devices.
The Analog Devices Inc. ADuM7703 is offered in an 8-lead, wide-body SOIC package, with an operating temperature range of -40°C to +105°C. This device is also available in a 16-lead, wide-body SOIC with an extended operating temperature range of -40°C to +125°C.