a203_6 - '. CHARGE SENSITIVE PREAIIIIPLIFIERT SHAPING....

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Unformatted text preview: '. CHARGE SENSITIVE PREAIIIIPLIFIERT SHAPING. AMPLIFIER ' o ' I m VOLTAGE AMPLIFIERI I I TEE I Low LEyEL DISCRIIIIIINATOH. Models A—203 and A206 are a Charge Sensitiye PreamplifierfShaping Amplifier and a matching Volt- age anlifierfLow Loyel Ciscriminator deyeloped especiwa for instnimentation employing solid state detectors, proportional counters, photomultipliers or any charge producing detectors in the pulse height analysis or pulse counting mode of operation. While these units were specifically designed for satellite instrumentation, the following unique char- acteristics matte them equally useful for space, lab- oratory and commercial applications: » Small Size its Pin Dual InvLine Pacltagei allows :- PoIe-zero cancellation teflernall. mounting close to the detector. a Untmlar and bipolar Gutputa n PowEJr required is typicallyr 1B milllwallfi- a Elolh Pulse Height Analysis and Pulse Counting a Single powEr supply voltage. mode of operation. r Low noise. - High Reliability. a One year warranty. THE III-203 ! lit-206 COMPLETE SYSTEM COUNTER " M IIICHANNEL - . UANALYEEH cum» Height Analysis AMPTEK HIGH FtELIAEtILIT‘tr SCREENING Fume Counting ht nrte DET ECTCIFI 1. PRECAP 1ifICUf-tL: MILETDBBS. method 201?. Low Magnification, High Magnification. 2. SEALING: Welded, hermetic seal. 3. STAMPING: Date code and serial number. 4. STABILIZATION BAKE: MlLCTEi-fida. method tees, Condition C. +150“C, 2-1 hours minimum. 5. TEMPERATURE MlL—STCBBE. method 1010, Condition C min. T= _EE:“C to +150“C. CYCLE: 10 minutes each extreme, 5 minutes maximum transfer time. 0. CENTRIFUCE: MIL—STDBBS, method 2001, Condition s. “(I Axis; tattoo G's. T. ELECTRICAL TEST: As per specifications. 3. BURN-IN TEST: MIL-STDrBss, method 1015, 160 hours at +125’C. Q. FINE LEAK TEST.- MILfiTD-BBS, method 1014. Condition A. Rejection If leak rate In excess of 5 x 10-fooisso. 10. GROSS LEAK TEST: MIL-ETDEBG, method 1014, Condition C. Fluoro Carbon: Rejection if stream of bubbles is present. 11. ELECTRICAL TEST: As per specifications. 1E. EXTERNAL VISUAL: MlLfiTD-BEI-B, met ho-d EDGE. AMPTEK INC. s as ANGELO oerE, BEDFCRD, MA 01?30 use. TEL: {em 2152242 FAX: ism ersetro SPECIFICATIONS W3: + 15”, T =EEI-"CIJ- Il'~.| PLiT C HARACTERISTICS SENSITIVITY: 1]: For positive unipolar output [Pin El: 2113 mvi'fvlev {SI}: 262 mvi'l'iiev {Gel} Adam'i‘vlcoulcmb: {HE pvielectrcn 21 For bipolar output [Pin 9}: 115 mvffvlev [31}; 144 mvffrfev lGe}: 2.6v1tl‘fvicoulomb; iii-.42 pvi'electron. NOISE: t] Unipolar: [Nominai] B Kev FWHM {Si}; 5.4 Kev FWHlvl lGe}; 1.4x1fl"“ coulomb rrns‘. STE electrons rms 2} Bipolar: 12 Kev FWHM {Si}: fill Kev F'IAI'HM {Eek 2.2::10'” coulomb rms NOISE SLOPE: lUEI' ewpf [Sit BU evipt [Ge]: fiypicei} ‘|.51:-t‘lt}|—'B coulombsi'pf DYNAMIC INPUT CAPACITANCE: 3,500 pi POLAle: Negative PROTEGTth': Bach-tobacl: diodes to ground DUTP' UT CHARACT EH1 ETIGE 1] O HARGE SENSITIVE PREAM P LIFIER OUT PUT-Pin 1:3: Rise tlme: buns Fail time: Buys AG Output irn pedan ce: 50R 2} SH A PING AMPLIFIER Time constants: Eeflns Positive UnipolarI Pin 13: AO output impedance: BET! Dynamic range: rose of in": Pole-zero cancellation: External iii-111i between Pins 12 and 13 AO output impedance: 21d] Dynamic range: 35% of it; Bipolar, Pln ii: GEN EFtAL OPERATING VOLTAGE: + 10 to +13 'll'DO OPERATING OURRENT: 1.4 ma Ouiescent @151: TEMPERATURE: — 55" to + TWO operational PACKAGE: to Pin Oual ln-Llne [Metall SCREENING: AfvaTEK HIGH RELIABILITY WARRANTY: One year OPERATING NOTES + The A—EDS has two parts: 1} A Charge Sensitive Preamplifier {OSPL 2} A Shaping Amplifier {SA}. The output of the GSP is internally connected to the input of the SA. 4 Power to the ESP and SA are provided separately in order to provide maximum Flexibility for independent operation. However1 for normal operation Pin 11 and Pin 14 should be connected to its. Supply is Internally bypassed. Oars should be taken in circuit layout and in some applications power supply decoupling may be helpful. if the leads of the A-EUS are left long, or the unit is socksted, the uncon- nected Pins 2. 3. B. if. 10, 15. 15 should be grounded in order to minimize picieup. - The sensitivity of the CSP ls defined by: G: we in mviiviav {Si}, where O is the feedback capacitoan of]. The feedback capacitor In the A-EGE is 2pf. If a lower sensitivity is desired. an external capacitor may he added between Pins 1 and 13. A capacitor with good temperature stability should be used and the leads should be kept short. - The detector must be capacitively coupled to Pin 1 with a capacitor of adequate voltage rating. - If the output of the OSP [Pin 13} is to be connected to external circuitry it must be coupled with an external capacitor. This output can drive several feet of unter— minated coaxial cable. - The SA has two outputs; 11 Unipolar {Pin 31 which is single integration - single differentiation. 2} Bipolar [Pin Ell which is single integration - double differentiation. Either output can drive the A-EUS. which has an internal input coupling capacitor. It the unipolar output [Pin 3] is to be connected to other external circuitry it MUST be capacitively coupled. - If pole-zero cancellation is required at the unipolar output In order to minimize the baseline shift. a1fvlt‘r resistor must be externally added between Pins 12 and 13. I The A—2U3 can be tested with a pulser by using a small capacitor to inject a negative test charge Into the Input. The unit will respond to the negative-going edge of either a square wave or a tail pulse with long fall time tr:- 10 yet. In either case the negative-going transition should be less than 20 ns. Charge transfer in the circuit is according to O = OH. where O=total amount of charge delivered to in- put, O = test capacitor and v = amplitude of the pulse. Use only a small capacitor in this circuit f1-1Epr}. DO NOT con- nect a low impedance pulser through a large capacitor when testing as this will overdrive the input and may damage the unit. Example: A 22 my tail pulse across a Ept test capacitor is equivalent to 1 ivlev energy loss in silicon {3.5 evi'pair] and will produce a 211:1 my unipolar pulse at Pin 3. A-EDB TEST CIRCUIT F A57 HiSE m 3‘ p __ PULS E H . = E} 5...: r: m ...- Iran Negative going :-- Ftise time {Edna Fall time :s-10ps, or square wave Amplitude: ZEmv =1lvtev{Sil try-nu chlyl' =i'2x1U-“f'I-r: 122HIO-Ivt = Adaii‘i-“cnulnmb:1Mevt3i] III-2133 LOGIC AND PIN CONFIGURATION 0% I111! l—‘G iii:- JI— 1M Juvuu-P {IJ'IUI Pin 1 Charge Sensitive Preamplifier Input Pins 2, 3, E. F. 10. 15, 16 Me Connection Pins 4. 5 Ground and case Pin ti Unipolar Shaping Amplifier Output Pin 9 Bipolar Shaping Amplifier Output Pin 11 Va Shaping Amplifier 1+ 101! to + 115W} Pin 12 Shaping Amplifier Input Pin 13 IGharge Sensitive Preamplifier Output Pin 1-1 ‘v's O.S. Preamplifier 1+ 1W It! +1599} '--.ii°smsiuei-I’Fijisa I SPECIFICATIONS - The output of the VA is NOT internally.f corinifictlefiéo the ., LLD. Pin 13 MUST be connected to in tEi t e is to We: +15‘v’.T=25 Oi he used 1} VOLTAGE AMPLIFIER 1* Power to the 'v'A and LLD ls provided separater in order Gain: 1-: to nominal. non Invertan to provide maximum flexibilitv forlndependont operation. Input polan‘tv: 1] Positive Unipolar; Dynamic However, tor normal operation Pins 4 and 5 should be range,- Base of us connected to v5. 2] simian ||'- a bipolar input is “5. - The VA has an internal input coupling capacitor and no ad. an axiamai regigior other external capacitor is needed when connecting to [ngame must. be connected either unipolar or bipolar outputs of the iii-203 or the between Pin 3 and ground. A—225. DYNAMIC FHI'IQE1E-5‘t‘3 DI V5 - If the output of the VA [Pin 13} is to be connected to AC: Output Impedance: soc external circuitrv it MUST be coupled with an external Integral Nonlinearllv capacitor. This output can drive several feet of tintermin_ at full output: 5. 5.5% ated coaxial cable. - For bipolar input pulses to the VA connect a 3313M} 2} DISCRIMINATOFI resistor from Pin a to ground. This biases the amplifier for input Polarity: F'oeitive or Bipolar max'mum WWW“ ran-RE- I output pulse; Fugitive: 5% wide: guy, of psi The it The LLDI requires a reference voltage "ii'Fi and a variable flutput pulse width can be increafi. voltage Us. Set Up: at a level between + 4.5 and + 5.5 volts and by that addition of an external and 1A. to a Iovver voltage than flip. The difference. tile-Li's. is capacitor {1 m 10 pi; between pins the discrimination level at which the unit will trigger. For 5 and 3. example, if 1ills: +5‘ir and 1v'v= +3.5v anv pulse of ampli- tude greater than +1.5v will trigger the discriminator. Rise Time: 25 ns _ , , , , II The LLO output pulse is t1.rpu::all1.r a 5 heel: vvii:le poettive Reference voltage: Pin 11, the: Range: +4.5 to pulse. A vvider pulse can be obtained bv connecting a ca- + 5'5 “Dc “mpemn GE )2 Mn} pacitor [1 to 1D pf} between Pins 5 and it. Leave these pins 1il'arlable voltage: Pin 15. W; Wv o 'ii'Fil unconnected if the standard pulse width is acceptable. Dlscrln‘iinetion Level: 'v'g — 'v'v limpedaHCB }2Mfl] - Atvpical circuit to provide bias tothe LL'D is shown below. GENERAL OPERATING VOLTAGE: + 10 to +1B‘v'flO OPERATING CURRENT: I15 ma Quiescent @151»r TEMPERATURE: -— 55°C to + 'i'lJ't: operational PACKAGE: 16 Pin Dual In-Line {Metal} SCREENING: Alv'lFTEii HIGH RELIABILITY WARRANTY: One year. A7255 LOGIC AND FIN CONFIGURATION are“: u huts-re. «yum was“. _l'L w.- WW. - 1o maul-3| A temperature stable voltage reference should he used. =i:rE~:Iolar _ Min-Ju- i “MO-"r - Ferauimneisp niftll'i {ACTUAL SlZEl Pin 1 Ground and Case '"mmn'W Pins 2. i', 14. 15 No Connection E Imam "from than [a Pin 3 Bipolar Input Rlas . . ‘ Pin 4 1iisArnplifier{+1IZI‘IiIr to +18?) - - 1:. Pin its Discriminator [+1fl'v' to +151!) 5 a Pin a Disor‘imlnator Pulse Width Adjust r 5 a Pin Discriminator Pulse Width Adjust Pin a Discriminator Output .. Pin 1i'.‘| + ‘v'v variable We {VF-it 1 ur- Pin 11 +‘v'pi reterenoe {+4.5 to +5.5 'iiDOl .5}; cam... 33 Pin 12 Discriminalor Input _ ‘1 Pin 13 Amplifier Output Pin 15 Amplifier Input OPERATING NOTES - The secs has two parts: 1} A matching 1il'oltage Amplifier {VA} to the A—EDS or A—225 2} A Lower Level Discriminator {LLDJ F5235 1351 Ward 1:" “13 A'm‘r'fi'em' THE A-2D3lfl-2DB COMPLETE SVSTEH AND 'I'VPICAI. WAVEFOHMS PULSE COUNTING MODE MULTIC-H AN N EL ANALYZER PULSE HEIGHT fiNAL‘fSIS mum to TEEI: Dul ut of 1:36P Exams.” Clut ut of Unipolar Oulput uf LLB Outfut-Pusitlva Ga ZED-Hon” ts” {ll-2 3. Pin 13} {ah-203, n 91 SA. {pl-2&3. Pin a} (#206. P n 9} — mar: av TYHGALAPPUCANDNS ———-9 II...an ———-£ _ ___U‘ a :0 fl- I'M 5 L LZLILCICH _.—-u IHIGH VOID-l.“ TyplcaE cunnentlnn fill a phalamultlpller to the ill-203 Typical cannenllan of a solid state detector to the 11-203 II'IGI'IES 115 Pm Dual ln-Llna Typical Dlmansinns: m- AMPTEK INC. 6 DE ANGELO DRIVE, BEDFORD, MA mm LISA. TEL: {51?} $5242 FM: {61?} $534?!) ...
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This note was uploaded on 01/15/2012 for the course AAE 490 taught by Professor Andrisani during the Fall '09 term at Purdue University-West Lafayette.

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a203_6 - '. CHARGE SENSITIVE PREAIIIIPLIFIERT SHAPING....

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