CTSD Precision ADCs – Part 4: Ease of ADC Input and Reference Drive Simplify Signal Chain Design

CTSD Precision ADCs - Part 4: Ease of ADC Input and Reference Drive Simplify Signal Chain Design

In this article, we highlight one of the most important architectural traits of new continuous-time sigma-delta (CTSD) precision ADCs: the easy to drive resistive input and reference. The key to achieving optimal signal chain performance is ensuring that the input source or the reference itself is not corrupted when interfaced with an ADC. With traditional ADCs, complex signal condition circuitry design, termed as front-end design, is required for the seamless interface of input and reference to the ADC. The unique architectural properties of CTSD ADCs enable simplified and innovative ways of interfacing this ADC to the input and reference. To begin, let’s have a quick recap of traditional ADC front-end designs.

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