PIPELINED ANALOG-DIGITAL CONVERTERS INTEGRAL NONLINEARITY MODELING FOR POST-CORRECTION
Abstract
An input-dependent integral nonlinearity (INL) model is developed for pipeline ADC post-correction. The INL model consists of a static and dynamic part. The INL model is subtracted from the ADC digital output for compensation. Static compensation is performed by adjacent sets of gains and offsets. Each set compensates a certain output code range. The frequency content of the INL dynamic component is used to design a set of filter blocks that performs ADC compensation in the time domain. The compensation scheme is applied to measured data of two 12-bit ADCs of the same type (Analog Devices AD9430). Significant performance improvements in terms of spurious free dynamic range (SFDR) are obtained.
Event details
- Event
- "Instrumentation for the Information and Communication Technology Era"
- Technical Committee
- TC4
- Place
- Kosice, SLOVAKIA
- Time
- 8 September 2010 - 10 September 2010
- Website
- http://www.imeko.tuke.sk