Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

An ASIC for readout of SiPMs or MPPCs

1,522 views

Published on

We have developed an application specific integrated circuit (ASIC) suitable for the readout of up to 64 silicon photomultipliers (SiPM).

The ASIC can be used with SiPMs and scintillators for energy spectroscopy and timing of ionizing radiation. The ASIC provides important functionality for SiPMs: The preamplifier input potential can be programmed to set the bias voltage for the SiPMs connected to the input. The input dynamic range is relatively large (0 to 55 pC). The ASIC triggers, if any of the input signals exceeds a threshold. The trigger can be used to sample the signal amplitude and record the trigger time. The ASIC delivers both amplitude and time from all channels via an analog multiplexer. The ASIC has a programmable register which configures digital-to-analog converters for the preamplifier input potentials, the trigger thresholds, the internal bias setting and other functionality. Many ASICs can be combined for the readout of multiple arrays of SiPMs. The preamplifier input is designed for capacitive load of up to 300 pF and a dark current of up to 10 uA.


Published in: Technology, Business
  • The VATA64HDR16 with SiPMs or MPPCs is good for pulse height spectroscopy at relatively low rate: The maximum rate capability per channel is somewhere below a kHz. The maximum readout rate is limited by the 10MHz max. clock of the analogue multiplexer.

    Additional information at
    Proceedings of the 12th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD10), Nuclear Physics B - Proceedings Supplements, Volume 215, Issue 1, June 2011, Pages 344–348.
    And at http://www.inp.demokritos.gr/~km3net/Aristeia/APDs%20and%20SiPMTs/Bagliesi_FrontEnd_ASIC_64_SiPM.pdf
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • nice development. for me interested, rate measurement. have you done the pile up measurement and upto what event rate should perform ASIC?
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

An ASIC for readout of SiPMs or MPPCs

  1. 1. An ASIC for Readout of SiPMsD. Meier1, S. Mikkelsen1, J. Talebi1, S. Azman1, G. Mæhlum1Integrated Detector electronics AS17. February 2011 at CERN
  2. 2. We have developed an application specific integrated circuit (ASIC) suitable forthe readout of up to 64 silicon photomultipliers (SiPM).The ASIC can be used with SiPMs and scintillators for energy spectroscopy and timing ofionizing radiation. The ASIC provides important functionality for SiPMs: The preamplifierinput potential can be programmed to set the bias voltage for the SiPMs connected tothe input. The input dynamic range is relatively large (0 to 55 pC). The ASIC triggers, if anyof the input signals exceeds a threshold. The trigger can be used to sample the signalamplitude and record the trigger time. The ASIC delivers both amplitude and time fromall channels via an analog multiplexer. The ASIC has a programmable register whichconfigures digital-to-analog converters for the preamplifier input potentials, the triggerthresholds, the internal bias setting and other functionality. Many ASICs can becombined for the readout of multiple arrays of SiPMs. The preamplifier input is designedfor capacitive load of up to 300 pF and a dark current of up to 10 uA.We have produced prototypes of the ASIC and tests are in progress. The articledescribes the functionality of the ASIC and its performance.
  3. 3. Integrated Detector Electronics AS 3There is great interest in SiPMs / MPPCs,since they provide an alternative to PMTs, and APDs.SiPMs / MPPCs are photon counters, that offer a large effective gain,fast signal formation, good detector efficiency, small/compact, etc.There is great interest in mixed-mode analog-digital integrated circuits(ICs) for readout of SiPMs / MPPCsICs can read many SiPMs/MPPCs, ICs can be designed for low noise,ICs provide many functions, and they are small/compactMany applications require specific ICs ----> ASICsAn ASIC provides a compact data acquisition system solution in amonolithic silicon chip.
  4. 4. Integrated Detector Electronics AS4
  5. 5. Integrated Detector Electronics AS 5ModuleswithIntegratedReadout
  6. 6. Integrated Detector Electronics AS 6
  7. 7. Integrated Detector Electronics AS 76500 μm х 9810 μmASIC 64 inputs
  8. 8. Integrated Detector Electronics AS 8ASIC preliminary specifications, not yet optimized for a specific application.
  9. 9. Integrated Detector Electronics AS 9All features are programmable via DACs, or can be enabled/disabled
  10. 10. Integrated Detector Electronics AS 10Sequential analog readout of the amplitude and TAC from all channels,SH can be generated internally, or applied externally
  11. 11. Integrated Detector Electronics AS 11
  12. 12. Integrated Detector Electronics AS 12Trigger200nsSemi-Gauss1 pC inputcharge
  13. 13. Integrated Detector Electronics AS 13Signal shape fits a1st order Gaussian shape,here about 200 ns peakingtime.MPPC capacitive loadaffects the pre-amp risetimebut has negligible effect onthe signal shape
  14. 14. Integrated Detector Electronics AS 14Large dynamic input range, programmable range, up to +55 pC input charge
  15. 15. Integrated Detector Electronics AS 15http://jp.hamamatsu.com/products/sensor-ssd/4010/S10931-050PAssembly of LYSOand MPPC,thanks toA.Rudge, P.Weilhammer1.35V*320pF/3600pixels750000 =1.602e-19C
  16. 16. Integrated Detector Electronics AS 16Measurements agree with Hamamatsu datasheet.
  17. 17. Integrated Detector Electronics AS 17MPPC directly coupled to readout inputInput stage provides: variable gain and input voltage adjustment by DAC
  18. 18. MPPC/LYSO with ASICEnergy spectroscopy withCd, Am, Co sourcesresolves photopeaks –FWHM not optimizedrelatively low energy thresholdExperimental setup
  19. 19. MPPC/LYSO resolves peaks from Na22, 23 % FWHM at 511 keVobservation is consistent with Szawlowski et al. Proc. NSS 2007.LYSO6k to 7k ph.at 511 keV
  20. 20. -20.. +55 pCdynamicrange-6..+7pC dynamic rangeDdB = 20log10(75000/8)= 20log10(13000/1)= 80dB
  21. 21. Integrated Detector Electronics AS 21We measure the voltage at IN versus the DAC value.We observe a linear relation between IN voltage and DAC value, 3.5mV/DAC.Change by 3.5mV corresponds to gain change of 0.26% relative to G=750000.The DAC value can be set for each input individually and can be used to finetune the MPPC bias voltage above the breakdown.
  22. 22. Integrated Detector Electronics AS 22The DAC value can be used to fine tune the MPPC bias voltage above the breakdown– thereby adjust the combined gain of the assembly MPPC/ASIC.Experimental setup
  23. 23. Integrated Detector Electronics AS 23We have developed an ASIC for the readout of up to 64 SiPMs/MPPCs.The preliminary results agree with original specifications and satisfythe initial requirements.Future improvements are possible, most desirable are:reduce power dissipation by factor 5 to 10reduce the ASIC sizeoptimize ASIC for high input capacitanceCFD – done in other ASICsADC – e.g. Wilkinson ADC in every channel, done in other ASICsoptimize for a specific application
  24. 24. Integrated Detector Electronics AS 24Pier Simone Marrocchesi, Univ. of Siena and INFN - Pisa (Italy)Alan Rudge and Peter Weilhammer, CERNThank you

×