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An 18-Bit Dual-Channel Oversampling Delta-Sigma A/D Converter, with 19-Bit Mono Application Example

The architecture and performance of a stereo 18-bit delta-sigma analog-to-digital converter are discussed. This 28-pin device contains dual delta-sigma modulators and dual digital filters/decimators. Special emphasis is placed on applications examples using the A/D converter in various common audio environments including AES/EBU integrated circuits and digital signal processors. In addition, an example application is discussed in which the dual channel 18-bit part is configured as a single 19-bit A/D converter yielding a dynamic range of 100 dB.

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