SERIES PVI-2TE 2-12 Âµm IR PHOTOVOLTAIC DETECTORS ...

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IR Measuring Set4. VPAC and VPDC PreamplifiersVPAC-xx and VPDC-xx preamplifiers take full advantage of all detectors’parameters and provide the best protection against ESD, EMI and humanmistakes. The input stages of all VPAC-xx and VPDC-xx preamplifiershave been built with application of ultra low noise transistors or integratedcircuits. They have been optimally configured and biased to achievemaximal S/N ratio, keeping the remaining parameters (gain, bandwidth,maximal output signal and others) within the required limits.4.1. Noise in AmplifiersTo amplify a small signal deriving from IR detector to the value allowing itsfurther processing, a multi-stage preamplifier is usually needed. A resultantnoise performance of the amplifier (preamplifier) depends in practice on thenoise performance of the first stage. The noise performance is usuallyexpressed as the noise voltage or noise current referred to its input (forvoltage or current mode amps respectively). Input stages of VPAC-xx -VPDC-xx series have been designed towards achieving maximal s/n ratiofor a specific type of detector, taking full advantage of its performance.4.2. Technical DataVPAC-xx series presents AC preamplifiers designed for use withphotovoltaic and photoconductive detectors. VPDC-xx series – DCpreamplifiers cope with photovoltaic detectors. Depending on what type ofIR detector is to be used, we offer specific version of a suitablepreamplifier:VPAC-xx-i and VPDC-xx-i preamplifiers are mounted inside DR-1 orDR-10 heatsink and designated for use with TE-cooled detectors. In thiscase a measuring set must be equipped with STCC or CTTC controller ofthe TE cooler. Building the preamplifier into the heatsink enabled radicalshortening the connections between the detector and the input stage whatresulted in significant lowering of EMI level.The output signal of the preamplifier is available on BNC connector but theremaining signals (supply voltages and driving signals for the TE-cooler’scontroller) come out via 9-pin Canon connectorFor some applications VPAC-xx-s and VPDC-xx-s standing alonepreamplifiers are useful. They are supplied in screened housings equippedP
IR Measuring Setwith BNC connectors for the input and output signals and 9-pin Canonconnectors for the power supply.All preamplifiers require supplying devices of very low noise level at theoutput (like accumulators or especially designed well-filtered powersupplies). For standing alone preamplifiers our PPS Ultra Low NoisePower Supply is recommended.P
Page 2 and 3: SPECIFICATION @ 20ºCCHARACTERISTIC
Page 4 and 5: SERIES PVMI-2TE8-12 µm IR PHOTOVOL
Page 7 and 8: SPECIFICATION @ 20ºCCHARACTERISTIC
Page 9 and 10: Boston Electronics Corporation91 Bo
Page 15 and 16: IR Measuring SetFig.7. Detector in
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Page 23 and 24: DIMENSIONSThe detector is followed
Page 25 and 26: VIGO System S.A.Packages with BNC C
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SERIES PVI-2TE 2-12 Âµm IR PHOTOVOLTAIC DETECTORS ...

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