A 12bits 40MSPS SAR ADC with a redundancy algorithm and digital calibration for the ATLAS- LArg calorimeter readout
نویسندگان
چکیده
This paper presents a SAR ADC with a generalized redundant search algorithm offering the flexibility to relax the requirements on the DAC settling time and allowing a digital calibration, based on a code density analysis, to compensate the capacitors mismatching effects. The proposed architecture uses a DAC with only 2 unit capacitors, for N-bit resolution, and a simplified monotonic switching algorithm. The design is fully differential featuring 12-bit 40MS/s in 130-nm 1P8M CMOS process. Keywords—Digital calibration, Non-binary, Redundancy, SAR ADC, Switching algorithm.
منابع مشابه
A 12 bit 40 MSPS SAR ADC with a redundancy algorithm and digital calibration for the ATLAS LAr calorimeter readout
We present a SAR ADC with a generalized redundant search algorithm offering the flexibility to relax the requirements on the DAC settling time. The redundancy also allows a digital background calibration, based on a code density analysis, to compensate the capacitor mismatch effects. The total number of capacitors used in this architecture is limited to a half of the one in a classical SAR desi...
متن کاملDigital Calibration of SAR ADC
Four techniques for digital background calibration of SAR ADC are presented and compared. Sub-binary redundancy is the key to the realization of these techniques. Some experimental and simulation results are covered to support the effectiveness of these techniques. Keywords—SAR ADC, digital background calibration, DAC mismatch, bit weight, sub-binary redundancy
متن کاملCALIBRATION AND MONITORING OF THE TILE HADRONIC CALORIMETER OF ATLAS WITH A 137Cs SOURCE
Monitoring and intercalibration of the ATLAS TileCal is based on a hydraulically driven gamma source system. Extensive R&D has been carried out and has led to a detailed design for the full ATLAS TileCal. A prototype system has been built and tested on the Barrel and Extended Barrel modules. The realisation of the Cs source system, results concerning its performance, comparisons with other cali...
متن کاملA design methodology for SAR ADC optimal redundancy bit
This paper presents a design method of SAR ADC (Successive Approximation Register Analog-to-Digital Converter ADC) utilizing redundancy bits. In general, binary search algorithm is used as a conventional SAR ADC operation algorithm. It’s possible to realize a high-speed SAR ADC by using non-binary search algorithm which is realized by adding redundancy bits. However, the A/D conversion time var...
متن کاملSignal independent digital calibration technique for SAR ADC with one bit redundancy
A digital calibration technique for high resolution SAR ADC with only one redundant conversion bit is presented in this paper. The proposed work employs no extra calibration DAC or input signal as calibration reference. Calibration signal is generated through switching redistribution DAC in two calibration phase, so that calibration accuracy will not be affected by input signal distribution. DA...
متن کامل