A 12-bit 10 MS/s 12 mW pipelined SAR ADC for CubeSat systems using V$_{cm}$ -based switching MDAC and unit capacitor array
This paper presents a 12-bit 10 MS/s pipelined successive approximation register (SAR) analog-to-digital converter (ADC) for a CubeSat system. A full differential architecture is adopted, and a single-ended-to-differential circuit is integrated in the ADC. The proposed ADC is divided into a first-st...
Gespeichert in:
Veröffentlicht in: | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2020, Vol.953 |
---|---|
Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | This paper presents a 12-bit 10 MS/s pipelined successive approximation register (SAR) analog-to-digital converter (ADC) for a CubeSat system. A full differential architecture is adopted, and a single-ended-to-differential circuit is integrated in the ADC. The proposed ADC is divided into a first-stage 6-bit SAR-based multiplying digital–analog converter (MDAC) and a second-stage 8-bit SAR ADC. A new MDAC using a Vcm -based switching method is employed to reduce power dissipation and improve the linearity of the ADC. Moreover, a unit capacitor array is used to improve the conversion speed and linearity of the first-stage MDAC. In addition, several radiation-hardened-by-design techniques are adopted in the layout design to protect against space radiation effects. A prototype chip was fabricated in a 0.18μm mixed-signal 1.8 V/3.3 V process and operated with a 1.8 V supply. The chip occupies a core area of 1.35mm2 . The proposed pipelined SAR ADC consumes 12 mW and achieves a peak signal-to-noise-and-distortion ratio of 65.8 dB and a peak spurious-free dynamic range of 78.5 dB at a sampling rate of 10 MS/s. The figure of merit of the proposed ADC is 0.75 pJ/conversion-step. |
---|---|
ISSN: | 0168-9002 1872-9576 |
DOI: | 10.1016/j.nima.2019.163218 |