PULSE AMPLIFIER APPLICATIONS Space Instrumentation Portable Instr

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PULSE AMPLIFIER APPLICATIONS Space Instrumentation Portable Instr

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PULSE AMPLIFIER
APPLICATIONS Space Instrumentation Portable Instrumentation Nuclear Instrumentation Precision Active Filter Design Pulse Shaping
A275
FEATURES Power Slew Rate V/µs Input Noise nV/Hz Stable Operation Gain-Bandwidth Product High Reliability Screening Radiation Hard to10 rad(Si) Unity Gain Stable
A275 high performance hybrid differential op-amp developed pulse amplifier spaceborne nuclear instrumentation. power dissipation mW), high slew rate (100 V/µs), input noise nV/Hz), make ideal wide range op-amp applications. A275 packaged standard 14-pin hybrid DIP.
Compensation Compensation
47nF
Input
A275
47nF
Output
Bias adjust
Figure Connection diagram Function Inverting input Non-inverting input Bias adjust kohm) direct through ohms Compensation Case Ground Output through ohms Output direct through ohms direct Compensation (leave open gain short gain
AMPTEK,INC. ANGELO DRIVE, BEDFORD, 01730 U.S.A. TEL: (781) 275-2242 FAX: (781) 275-3470 email: sales@amptek.com http://www.amptek.com
Absolute Maximum Ratings Supply Voltage Input Voltage Operating Temperature Storage Temperature Lead Temperature Range (Soldering, sec.) Electrical Characteristics Parameter Symbol Conditions Input Offset Voltage Input Offset Current Input Bias Current Input Capacitance Differential Input Resistance Common-Mode Input Resistance Common-Mode Rejection Ratio CMRR Common-Mode Input Range Power Supply Rejection Ratio PSRR Large-Signal Voltage Gain compensated ALFC @5kHz uncompensated @5kHz compensated AHFC @10MHz uncompensated @10MHz Pulse Risetime compensated uncompensated Output Voltage Swing positive negative Open Loop Output Resistance Output Short-Circuit Current lOSC source sink Slew Rate positive negative Input Noise Voltage Density Supply Current Power Consumption
+125 +150 +300
±4.5 +4.7 -4.5 ±1.25
Units kohm Mohm
-4.5
V/µs
+4.5
±1.1
±1.4
nV/Hz
Figure A275 gain phase A275 tested shaping amplifier using circuit shown Figure PC-275 TEST BOARD will accommodate three A275s will produce 5-pole pulse with risetime (2.3 peaking time).
Figure A275 pulse characteristics
3-pole shaping
10nF (HV)
(pole-zero) 44mV/MeV
47uH 440mV/MeV
168pF (NPO)
200ns time peak 1.5V/MeV
Output
A250
100pF (NPO) 1.07k
A275
A275
100M 10nF (HV) JFET Solid state detector
8.87k
8.87k
1.10k
1.10k
Active baseline restoration
BLR1
Figure A250 connected solid state detector with 3-pole shaping active baseline restoration.
Figure General case 5-pole response different peaking times

PULSE AMPLIFIER APPLICATIONS Space Instrumentation Portable Instr

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