LAB4D: A Low Power, Multi-GSa/s, Transient Digitizer with Sampling Timebase Trimming Capabilities

Abstract

The LAB4D is a new application-specific integrated circuit (ASIC) of the Large Analog Bandwidth Recorder and Digitizer with Ordered Readout (LABRADOR) family, for use in direct wideband radio frequency digitization such as is used in ultrahigh energy neutrino and cosmic ray astrophysics. The LAB4D is a single channel switched-capacitor array (SCA) 12-bit sampler with integrated analog-to-digital converters (ADC), developed in the TSMC 0.25um process. The LAB4D, operating at 3.2GSa/s, contains 4096 total samples arranged in 32 windows, for a total record length of 1280ns. The 3dB bandwidth is approximately 1.3GHz, with a directly-coupled 50ohm input. This represents a factor of 16 increase in the sample depth and an increase in analog bandwidth and sampling depth in comparison to the previous generation LAB3 digitizer. Individually addressable windows allow for sampling and digitization to occur simultaneously, leading to nearly deadtime-free readout for kHz readout rates. All biases and current references are generated via internal digital-to-analog converters (DACs), resulting in a stand-alone digitizer with no additional support circuitry. In addition, the LAB4D contains sample cell timebase trimming capabilities, reducing the intrinsic sample-to-sample time variance to less than 5ps; an improvement of about 80%. This allows the LAB4D to be used in precision timing applications with minimal post-hoc calibration.

References in corpus (8)

• Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
• A combined maximum-likelihood analysis of the high-energy astrophysical neutrino flux measured with IceCube
• Specific chemical reactivities of spatially separated 3-aminophenol conformers with cold Ca${}^{+}$ ions
• The Large Analog Bandwidth Recorder And Digitizer with Ordered Readout (LABRADOR) ASIC
• A 15 GSa/s, 1.5 GHz Bandwidth Waveform Digitizing ASIC
• Signal Processing for Pico-second Resolution Timing Measurements
• The first version Buffered Large Analog Bandwidth (BLAB1) ASIC for high luminosity collider and extensive radio neutrino detectors
• A Multi-Gigahertz Analog Transient Recorder Integrated Circuit

Cited by in corpus (4)

• Design and Sensitivity of the Radio Neutrino Observatory in Greenland (RNO-G)
• Constraints on the Diffuse Flux of Ultra-High Energy Neutrinos from Four Years of Askaryan Radio Array Data in Two Stations
• Suggestion of Coherent Radio Reflections from an Electron-Beam Induced Particle Cascade
• Dynamic tunable notch filters for the Antarctic Impulsive Transient Antenna (ANITA)