Array4p9 User Guide
Contents
1. J DF17 2 0 80DP 0 5V 57 12 sens Array4p9 User Guide Connector Information The type of connector used on the bottom of the Array4p9 is a DF17 2 0 80DP 0 5V 57 0 5mm pitch 80way 2mm high header These connectors mate with either DF17 3 0 80DS 0 5V 57 or DF17 4 0 80DS 0 5V 57 sockets which would need to be mounted on the motherboard 32mm apart see Figure 4 The DF17 3 0 80DS 0 5V 57 sockets give a 5mm board to board spacing and the DF17 4 0 80DS 0 5V 57 sockets give a 6mm board to board spacing Full details of the connector series can be obtained from Hirose http www hirose co p cataloge hp e68300022 paf Comnectors for the motherboard are available from several common distributors as shown in Table 1 and other main distribution channels Table 1 Order information for connectors which mate to the Array4p9 Comecrorpan Number Super Order number Posting _oFmeoyeososvern Dgkey HARO rea A A A A 0 0 IEA AN Peel 0 0 mm AR DF17 4 0 80DS 0 5V 57 Digikey H11120DKR ND Digi Reel DF17 3 0 80DS 0 5V 57 Mouser Electronics 798 DF173080DS05V57 Reel DF17 4 0 80DS 0 5V 57 Mouser Electronics 798 DF174080DS05V57 Reel FR AR AS NR NR NR TR ER oo Sa mm mm mm Mr mm o o gt EE lt gt ne Note that when designing the motherboard to interface to the Array4p9 then the connections will need to be mirrorred c2. in the vertical direction The overall dimension of 47 81mm x 46 31mm is actually defined by the extents of the Array4 packages and not the carrier PCB underneath This allows the Array4p9 modules to be seamlessly tiled on a pitch of 48 0mm in the horizontal direction and 46 5mm in the vertical direction 47 31 Sl 45 0 0 0 0 2 317 2 22 Q 2 PAK AK KR 15 5 itt Hat Pa 46051 LaL 19 9 BR 15 81 D LO 749 ES O 16 0 Dimensions in mm Figure 3 Dimensions of the Array4p9 as viewed from the detector side Copyright SensL 2011 sens Array4p9 User Guide Bottom View The circuit board onto which the Array4 packages are mounted is viewed from the bottom or connector side in Figure 4 and it has dimensions 46 5mm x 45 0mm x 1 6mm thickness lt can be seen that the arrays overlap the PCB by just over 0 6mm In each corner of the PCB there are four PEM nut fasteners These are internally threaded fasteners that press fit into the PCB to allow the module to be mechanical fixed to a motherboard or equipment frame Care should be taken to avoid excessive loading on the PEMs and board to board connectors although they should be suitable to mechanically support the load of an average scintillator block attached to the detector array The thread size for the PEMs is M2 5 for all four The PEM on the top right is encircled with silkscreen on the PCB to indicate the polarity of the array the indicator ma
3. the AD8132ARM operational amplifier in fast charge sensitive integrating mode Example oscilloscope screenshots of the signals observed on the output of the amplifier are shown in Figure 11 and Figure 12 The signal shape rise and fall time is primarily defined by the internal SPM RC time constant At the gain settings shown in Figure 10 defined by R1 and C1 feedback elements the pre amplifier output saturates prior to SPM saturation on the output as it is assumed that the SPM is being used in low light conditions Copyright SensL 2011 15 sens Array4p9 User Guide File Control Setup Measure Utilities Acquisition is stopped 4 00 GSa s 64 0 kpts Analyze Help 2 14 PM EEN 9 ele ala 500 ns afa T 1 8200 ns Figure 11 Dark noise of the SPM on the output of the differential preamplifier seen using 1Mohm 14pF oscilloscope probes File Control Setup Measure Acquisition is stopped 4 00 GSa s 64 0 kpts Analyze Utilities Help 2 06 PM Eis EEN EEN 0 More lof 2 Delete All t 00 als 50 0 ns 221 3550 ns Figure 12 Short 12nSec blue LED pulse seen at the output of the differential pre amplifier seen using 1Mohm 14pF oscilloscope probes Copyright SensL 2011 16 sens Array4p9 User Guide VI Revision Control Rev No Date Details of change s Author s 17 02 2011 5 Belis 1 Edited based on feedback from D Mcnally Copyright SensL 2011
4. A A A x lt De De De D lt De Be De Be p lt PU N N CO CO DO LL LAO LA ie x lt be be he be b LLE Z Z Z Z J O MO MO o LP MO MO MI MI o Tr Sc be be Be be EL DU D 7 J MO MO MO ly Sc Be be be HY DU N 1 D MEE A 7 lp Z LEA E E LA LA UA EAEE E lt DE be De be Be BE be be BE x b J DF17 2 0 80DP 0 5V 57 Figure 7 Circuit diagram for 80 way connector J1 Copyright SensL 2011 N N N Array 0 Array 3 Array 6 11 sens Array 2 Array 5 Array 8 UIUIUTUTUTUTUUTUTUTUTUTUTUTUTU gt E gt Gr Gr Gr Gr Gr Gr Gr Gp Gp Gr Gp Gp ap ap J MO MO MO MO PP D D DU OC PS DA DA PX DA DA sob A OA A A A A DA D DU OE DE LD DA DL N N N N N N N N N PL LL LL LL LA LL LL LL Lo O KO KO sy D Pa N i UlUTUTUJUTUTUJTU UTUTUTUTUTUJU UTUTUOI EU EN x lt p lt be be BK be be be be be be be be be be be behep N z z z zgr BU D Fa CJ LO OO ON on UIUTUTUTUTUTU TU al O D X DA DA DA A DA OA D Ek VA VA VA Y Y VA VA eee eee E O UMVIM o moro rmo N N N N P39 N P42 P40 P41 DU gt gt PX DA DA ar ar apr DU E mk D BU BU D Fi DD A GND Figure 8 Circuit diagram for 80 way connector J2 Copyright SensL 2011 60 MP Array4p9 User Guide IIA Array 1 LE vv vv vv A FA vv vv LL LLE TA Array 5 Array 4 LA LAO LAO LAO LA LO LA O NS Fa N EEN Aray 7 dd AN EN EN EN VA P Fa amp
5. IXEL 13 TXEL 14 17 LO A Lt Ly gt lt giii Copyright SensL 2011 10 m x y A A ar ar Jj Jj ai LJ Lu Lu x lt gt x lt x lt Figure 6 Circuit diagram of one of the Array4 modules ARRAY 8 2 18 PIXFl _INI13 19 orxeL1t2 Array4p9 User Guide sens Interfacing Connector Circuit Diagram The connections for the 80 way DF17 series connector J1 are shown in Figure 7 and those for J2 are shown in Figure 8 The connector locations and the polarization are denoted on the silkscreen on the bottom layer of the PCB Figure 4 Each PIXEL IN and ARRAY IN signal are available on single pins with the exception of ARRAY_IN 4 which is available on both J1 and J2 The power supply pins for the temperature serial ID chip VDD and GND and the temperature serial ID output are also available on both J1 and J2 The reason for the repetition in these cases is that this allows the board to be plugged into the motherboard either way around as a safety feature to prevent otherwise possible damage Aray 1 Array 4 Array 3 Array 7 J OU MO MO MO MI MO MO LP J MO MO MI MI MI MI MO LP Uh E be be be be be bx HY PS PX PX PX IX DA px p 2S PS P X bX X P Xx x x p PS PX PX PX X Xx x p D FAA A AA ke A A D EN EN EN EN EN d LI EE LE LL Le EN EN EN N N N N N N N NE N zZ e e e eege eegee LA E EEEE L N A N P39 N P42 P40 P41 J1 P 2 GND D D FAA FA A A A AA
6. OE IE Ee 11 Conneclor C17 AA NE ET OE asa ll Connector Information doin 13 Temperanire Monto rlaernii Ea On CAD AAA AAA AA ke OE 14 Po aa AM A A A EE A IE Er 15 VI REVISION CONTROL eeseessssessssecssssssscssoscsessoscososessesssssosesesseseosessesssssosessosessossssosssssssesessessosessessssosesssssoo 17 Copyright SensL 2011 sens Array4p9 User Guide Contact For all enquiries email support sensl com ll Introduction About this Document This document provides the user with a comprehensive description of the Array4p9 detector Optical electrical and mechanical features of the Array4p9 are described Getting Started Please ensure that users have familiarized themselves with this user guide before using the Array4p9 Unpacking the System and Preparing for Use Contents of the package e 1 Array4p9 detector module minimum e Test data sheet Unpack the contents and identify each of the components ensuring that ESD considerations are taken into account when handling the Array4p9 It is recommended that rubber gloves are used when holding the Array4p9 to avoid marking the optical surface which can be easily scratched if mishandled Often the product is used with optical grease for example to couple scintillator blocks to the detectors Care should be taking when cleaning the epoxy surface and it is recommended to use a clean lint free cloth with ethanol to clean off the excess grease Safety Considerations e The sys
7. be directly connected to a pre amplifier circuit such as a trans impedance amplifier to convert the charge current produced by photon detections into a usable voltage for analog to digital conversion An example circuit is the fast charge sensitive integrating differential output pre amplifier shown in Figure 10 The pre amplifiers are implemented using Analog Device s AD8132 chips http www analog com static imported files data_sheets AD8132 paf Use of differential output amplifiers allows the output signal to be transmitted over longer cable length reducing sensitivity to ground potentials variations across the system compared with a single ended amplification system The gain is defined by the 1K feedback resistor while the 4 7pF feedback capacitor and 47ohm input resistor suppress ringing and provide stability of the transient response The 47 ohm output resistors provide matching of the low output impedance of the pre amplifier to the transmission line impedance thus providing reflection free operation The value of the HV bias signal is normally around 30V but may vary slightly between different Array4p9 modules Consult the test sheet shipped with the Array4p9 for the recommended operating conditions of the particular module ARRAY_INEO7 J1 Pin 82 of SPMArray4p39 3mm SPM pixel of SPMArray4p9 J4 Pin 79 of SPMArraytpg PIXEL _INLO Figure 10 Typical application circuit for a pixel of the Array4p9 using
8. ll body PET systems The detector head contains detectors and readout connectors only and there is no pre amplification circuitry on the detector itself This allows the customer flexibility to design their custom readout system There are numerous possibilities from the readout scheme including individual pixel readout cross wired readout and summed readout The Array4p9 system architecture is modular and is manufactured using SensL s Array4 package The Array4 is a ceramic package that houses a 4 x 4 array of 3mm SPM devices The package is of 20 way pin grid array PGA type with each anode contact of the SPMs in the array available on separate pins The package is designed for common positive high voltage bias supplied to the 4 remaining pins The Array4p9 uses a 3 x 3 array of Array4 packages to produce a 12 by 12 array of 3mm SPMs The detector is designed so that it can be tiled on all 4 sides with little dead space enabling very large area detectors to be manufactured On the back side of the detector there are two 80 way board to board connectors All of the SPM anode contacts are individually routed to the Array4p9 and there are 9 bias connections for each 4 x 4 block of SPMs in the Array4p9 packages The Array4p9 also has a temperature sensor and serial identification chip in the center of the package which allows the temperature to be continuously digitally monitored Copyright SensL 2011 sens Array4p9 User Guide IV Detector Lay
9. ompared to the connections of the Array4p9 shown in Figure 7 and Figure 8 Copyright SensL 2011 13 sens Array4p9 User Guide Temperature Monitor Identification Chip Each Array4p9 contains a temperature monitor directly behind the ARRAY 4 package The is the DS1822Z from Dallas Semiconductor Maxim The DS1822 digital thermometer provides 9 to 12 bit centigrade temperature measurements and communicates over a 1 Wire bus that requires only one data line for communication with a central microprocessor or FPGA It has an operating temperature range of 55 C to 125 C and is accurate to 42 0 over the range of 10 C to 485 Each DS1822 has a unique 64 bit serial identification code which will allow multiple Array4p9s to function on the 1 Wire bus and be traced in a large scanning system The connections for the chip are shown in the table below Table 2 Signals and power supply for the DS1822Z Signal Name Connector __ 3 0V to 5 5V OV TEMP SERID BT 60 1 wire digital communication interface Full details of how to communicate with the IC can be found on the manufacturer s website http pdfserv maxim ic com en ds DS1822 paf CL C 100N 0402 16U R 4K7 0402 1 16WN 17 UA U DSLozz22 GND Figure 9 Circuit diagram for the DS1822Z temperature monitor and serial identification chip Copyright SensL 2011 14 sens Array4p9 User Guide Typical Application Circuit The SPM pixels would typically
10. out Detector Optical Indexing Pixel Numbering Figure 1 shows how the detectors are referenced with respect to their positions in the Array4p9 when viewed from the topside The nine Array4p9 packages can be seen arranged in the 3 x 3 format The correct orientation of the detector array can be viewed by ensuring that the HV rectangular bond pads form columns to the left hand side of each Array4 package The SPMs are numbered consecutively with respect to the Array4 package that they in and are referred to as PIXEL_IN O to PIXEL_IN 143 in the circuit diagrams of this document CERA eo ee ee 6000 2 EER EEE EEE feof afaal lts eE eek FERRE so ES Pa E E sao aaaa a coca cara jaa ae EEE a eo la IEEERIIEEERE Rec IEEE gt so Figure 1 Layout of the SPM pixels on the Array4p9 package topside view Copyright SensL 2011 sens Array4p9 User Guide Array4 Numbering Figure 2 shows the indexing of the Array4 packages ARRAYIO to ARRAY 8 each of the Array4 packages having their own HV bias connection labeled ARRAY_IN O to ARRAY_IN 8 in the circuit diagrams in the following sections Figure 2 Indexing for each of the Array4 packages in the Array4p9 topside view Copyright SensL 2011 sens Array4p9 User Guide Dimensions Top View The dimensions of the Array4p9 as viewed from the top side of the array are shown in Figure 3 The Array4 packages are 16 0mm apart in the horizontal direction and 15 5mm apart
11. rking the ARRAY_IN O PIXEL INIO corner Two 80 way board to board connectors J1 and J2 provide the electrical interface to the detector array and the temperature sensor serial ID chip Their positions are also indicated on Figure 4 47 81 LO Radius 1 5 Silkscreen indicates 7 ARRAY_INL PIXEL INLOD 1 corner a LO N 1 LO zzz wes Q n Ls TY Ist m 7 gt y O 40 N Y a uy P vu DO dy OO Y N f M2 5 thread PEM nut x 4 LO LO 0 O lad O 16 0 16 0 Dimensions in mm Figure 4 Bottom side view of the Array4p9 Copyright SensL 2011 sens Array4p9 User Guide Side View A cross sectional side view of the Array4p9 is shown in Figure 5 The temperature sensor is mounted on the top side of the detector carrier PCB directly behind the central Array4 to get as close to the detector as possible A metal spacer of thickness 2 0mm ensures that the Array4 packages are all mounted at the same height The PEM nuts are inserted from the top side of the detector PCB and any retraining bolts inserted into the PEMS should not be screwed in more than 3mm to avoid the end of the bolt putting pressure on the back of the Array4 packages The Array4p9 has two 80 way Hirose DF17 series connectors on its bottom side The choice of connector on the motherboard allows the distance from the bottom of the detector PCB to the top of the motherboard PCB to be varied from 5 0mm to 6 0mm Connector part numbers are given in the nex
12. sens Array4p9 User Guide Version 1 1 March 2011 SensL Technologies Ltd 6800 Airport Business Park Cork Ireland www SensL com Copyright SensL 2011 sens Array4p9 User Guide Contents L COIN dd EE EE EE EE EE cositas 3 II INTRODUCTION isi Ee EE EG ei ESE GE Ge NG DO OE Ge DE NR De EE Ed OG GE Ge N ED GE ee DER De be DiE 3 ABOUT THIS DOCUMENT ees sesse ees sees see ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee Ee ee 3 GETTING STARTED oi oie So ee ee ee oe ee ee DE ee ee ee DE De GE Ge ee Ge 3 UNPACKING THE SYSTEM AND PREPARING FOR USE ee ee ee se ee se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 3 SARETY GEDS DERS DIG MS sara GE DE DE EE EE ie Se EE DE EE 3 SYSTEM CHARACTERISTICS AND SPECIFICATIONS esse sees sees sees se ee se ee se ee se ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee 4 DIMENS RE A EE A OE N b a d EE OE EE EE T E EE KO EE AE 4 PME ANNA 4 Na A e e E O uo O O A EE EN 4 TIT OVERVIEN usais aida aii 4 IV DETECTORLA YOU TE nana ia 5 DETECTOR OPTICAL INDEXING ccccccccscccscccssccsccusccusccusccuscccceccecseceecceusseusceusceusccusccuscceeccecceeceesceescescenceesess 5 A NA AO A O e PE PO EE RE N 5 AE NIN TL O E TE EE e E O POE E En IE 6 DIMENSIONS ds ie DA E q A A E E o PU UE COS A VA Boude VIEW dias S A ER EE ED ER OE OE OO OO A 9 vV ELECTRICAL GUIDELINES sins 10 ARRAYFCIRCUITDIAGRA Mica 10 INTERE ACI oe ER OE EE OE IE ER
13. t section on the electrical connections SPMArray4 Temperature sensor WHE Se i TEIT Metal spacer M2 5 PEM nut x 4 connectors Detector PCB 5 0 to 6 0 Motherboard PCB Dimensions in mm Figure 5 Cross sectional side view of the Array4p9 Copyright SensL 2011 sens Array4p9 User Guide V Electrical Guidelines Array4 Circuit Diagram A circuit diagram of one of the Array4 modules is shown in Figure 6 This shows the connections for ARRAYI8 which can be seen from Figure 2 to be in the bottom right hand corner of the Array4p9 Each of the nine Array4 packages have their own HV bias voltage connection and in this case the bias signal is labeled ARRAY_IN 8 The bias connection is common for all 16 SPMs in the Array4 package Each pixel of the array is a 3mm SPM device named PIXEL O to PIXEL 15 within each Array4 The circuit shows that for ARRAY 8 the input connections to the pixels are labeled PIXEL _IN 128 to PIXEL_IN 143 and these are connected to the p side of the SPMs The exact positions of the pixels in the Array4p9 can be obtained from Figure 1 The bias is connected to the on chip quench resistors of SPM s microcells which are on the n terminal This polarity means that a positive bias must be applied to the ARRAY_IN n signals with respect to the PIXEL_IN m connections ARRAYL8 SPMARRAY 4 IXEL O IXELL1 IXELL3 IXEL 5 IXEL 6 IXEL 7 IXEL 8 IXEL 9 IXELL12
14. tem is not intended for outdoor use e Liquids should not be spilled on or into the system Copyright SensL 2011 sens Array4p9 User Guide System Characteristics and Specifications Dimensions 48 0mm x 46 5mm x 9 5mm Weight 269 Power Typically 30V bias please refer to the test data sheet for recommended operating voltage 3V to 5V power for the temperature sensor Temperature Operating 0 C to 50 Storage 20 C to 70 Ill Overview SensL s Array4p9 is a modular detector array system Building on SensL silicon photomultiplier SPM technology Array4p9 provides a fully solid state four side scalable detector array The detector contains a 12 row by 12 column array of 3mm SPM detectors and each of these detectors can be individually read out from a pair of board to board connectors on the rear side of the detector One application of the Array4p9 is a low light imaging detector for the readout of scintillator matrices in Positron Emission Tomography PET scanners Employing SPM technology the Array4p9 detector head requires low power and operating voltage is compact highly robust and offers excellent spatial segmentation and photo response uniformity Addressing high resolution imagers such as small animal pre clinical and mammography PET Array4p9 is a compelling alternative to multi anode PMTs A high degree of modularity and compliance with the OpenPET standard makes Matrix9 a cost effective substitute for PMTs in fu
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