Analog Devices has introduced the AD7134 alias-free ADC that greatly simplifies front-end design and hastens time to market for precision DC-350kHz applications. Classic precision data-acquisition signal chain design is a time-consuming activity as developers balance anti-alias filter needs, passive component tolerances, phase and gain errors, and also high-speed ADC drive needs.
The device presents a new architecture for precision ADCs that fundamentally changes the design process. The new device removes the need for an anti-alias filter, and its resistive input greatly simplifies ADC drive.
The device is a quad-channel, 24-bit precision ADC with output data rate scalable from 10SPS to 1.5MSPS. Inherent anti-aliasing up to 102dB removes the need for an external anti-alias filter, thus needing 60 fewer passive components and five fewer active components. It also saves 70% board area, relative to a typical alternative implementation. Asynchronous sample-rate converter simplifies multi-device synchronisation, enables the user to accomplish a coherent sampling system with ease, and simplifies isolation needs.