A 1.54mW/Element 150μm-Pitch-Matched Receiver ASIC with Element-Level SAR/Shared-Single-Slope Hybrid ADCs for Miniature 3D Ultrasound Probes
Jing Li (Student TU Delft, University of Electronic Science and Technology of China)
Zhao Chen (TU Delft - Electronic Instrumentation)
Mingliang Tan (TU Delft - Electronic Instrumentation)
Douwe Van Willigen (Student TU Delft)
Chao Chen (TU Delft - Transport and Logistics)
Zu Yao Chang (TU Delft - Electronic Instrumentation)
Emile Noothout (ImPhys/Acoustical Wavefield Imaging )
Nico De Jong (ImPhys/Acoustical Wavefield Imaging , Erasmus MC)
Martin Verweij (Erasmus MC, ImPhys/Acoustical Wavefield Imaging )
Michiel Pertijs (TU Delft - Electronic Instrumentation)
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Abstract
This paper presents an ultrasound receiver ASIC in 180nm CMOS that enables element-level digitization of echo signals in miniature 3D ultrasound probes. It is the first to integrate an analog front-end and a 10-b Nyquist ADC within the 150 μ m element pitch of a 5-MHz 2D transducer array. To achieve this, a hybrid SAR/shared-single-slope architecture is proposed in which the ramp generator is shared within each 2 × 2 subarray. The ASIC consumes 1.54mW/element and has been successfully demonstrated in an acoustic imaging experiment.
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