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| Datasheet LCA-20K-200M Ultra-Low-Noise Current Amplifier Features Bandwidth and Frequency Response Independent of Detector-Capacitance (up to 10 nF) Extremely Low Noise, 14 fA/Hz Equivalent Input Noise Current Bandwidth DC ... 20 kHz 8 Transimpedance (Gain) 2 x 10 V/A Photodiode- and Photomultiplier-Amplifier Spectroscopy Charge-Amplifier Ionisation Detectors Preamplifier for Lock-Ins, A/D-Converters, etc. Applications Specifications Gain Test Conditions Transimpedance Accuracy Lower Cut-Off Frequency Upper Cut-Off Frequency Rise- / Fall-Time Gain Flatness Equ. Input Noise Current Equ. Input Noise Voltage Input Bias Current Input Bias Current Drift Offset Current Compensation Max. Input Current Input Offset Voltage DC Input Impedance Output Voltage Output Impedance Max. Output Current Supply Voltage Supply Current Weight Material Storage Temperature Operating Temperature Input Voltage Power Supply Voltage Vs = 15 V, Ta = 25C 2 x 10 V/A (>10 k Load) 1% DC 20 kHz (- 3 dB) 20 s (10% - 90%) 0.1 dB 14 fA/Hz (@ 10 kHz) 5 nV/Hz (@ 10 kHz) 2 pA typ. Factor 1.7 / 10 K 15 nA, Adjustable by Offset-Trimpot 50 nA (Linear Amplification) < 1 mV 50 (Virtual) // 5 pF 10 V (>10 k Load) 50 (Terminate with >10 k for best Performance) 10 mA (Linear Amplification) 15 V 40 mA typ. 210 gr. (0.5 lbs) AlMg4.5Mn, nickel-plated -40 ... +100 C 0 ... +60 C 5V 22 V 8 Frequency Response Input Output Power Supply Case Temperature Range Absolute Maximum Ratings SOPHISTICATED TOOLS FOR SIGNAL RECOVERY LCA-20K-200M/CG/R5/09FEB05/ Page 1 of 3 Datasheet LCA-20K-200M Ultra-Low-Noise Current Amplifier Connectors Input Output Power Supply BNC BNC LEMO Series 1S, 3-pin Fixed Socket Pin 1: + 15V Pin 2: - 15V Pin 3: GND PIN 2 -Vs PIN 1 +Vs PIN 3 GND Application Diagrams Photo Detector Biasing in Photovoltaic Mode: Use for Low Speed Applications and Minimum Dark Current. LCA U ltra-L ow -N o ise C u rren t to Vo ltag e C o nverter CURRENT IN P U T I/U A Z 0 2 -0 1 0 1 -2 0 Photo Detector Biasing in Photoconductive Mode: Use for Fast Applications and if More Dark Current is Tolerable. Bias Voltage Decreases Detector Capacitance. + BIA S VO LTAG E U se ad ditio nal Bypass C apacitor clo se to th e D etector (~ 100 n F, C e ram ic) LCA U ltra-L ow -N o ise C u rren t to Vo ltag e C o nverter CURRENT IN P U T I/U A Z 0 1 -0 1 0 1 -2 0 SOPHISTICATED TOOLS FOR SIGNAL RECOVERY Page 2 Datasheet LCA-20K-200M Ultra-Low-Noise Current Amplifier Dimensions 15.0 mm 94.0 mm 87.0 mm 74.0 mm IN 11.8 mm LCA OUT 44.0 mm 51.0 mm 27.0 mm DZ01-0101-21 POWER 21.6 mm 3.3 mm FEMTO Messtechnik GmbH Paul-Lincke-Ufer 34 D-10999 Berlin Germany Tel.: +49 (0)30 - 4 46 93 86 Fax: +49 (0)30 - 4 46 93 88 e-mail: info@femto.de http://www.femto.de Specifications are subject to change without notice. Information furnished herin is believed to be accurate and reliable. However, no responsibility is assumed by FEMTO Messtechnik GmbH for its use, nor for any infringement of patents or ather rights granted by implication or otherwise under any patent rights of FEMTO Messtechnik GmbH. Product names mentioned may also be trademarks used here for identification purposes only. by FEMTO Messtechnik GmbH Printed in Germany SOPHISTICATED TOOLS FOR SIGNAL RECOVERY Page 3 14.0 mm |
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