Datasheet HCA-20M-100K-C High-Speed Current Amplifier Features Bandwidth and Frequency Response independent of Detector-Capacitance (up to 50 pF) Low Noise, 3.5 pA/√ √Hz equivalent Input Noise Current Bandwidth DC ... 20 MHz 5 Transimpedance (Gain) 1 x 10 V/A Protection against ± 3.5 kV Transients Applications Photodiode- and Photomultiplier-Amplifier Spectroscopy Charge-Amplifier Ionisation Detectors Preamplifier for Lock-Ins, A/D-Converters, etc. Specifications Test Conditions Vs = ± 15 V, Ta = 25°C Gain Transimpedance Gain Accuracy 1 x 10 V/A (50 Ω Load) ±1% Frequency Response Lower Cut-Off Frequency Upper Cut-Off Frequency Rise- / Fall-Time Gain Flatness DC 20 MHz (- 3 dB) 18 ns (10% - 90%) ± 0.3 dB Input 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 3.5 pA/√Hz (@ 100 kHz) 0.8 nV/√Hz (@ 100 kHz) 18 µA typ. 0.8 nA / K ± 20 µA, adjustable by Offset-Trimpot ± 15 µA (linear Amplification) < 3 mV 50 Ω (virtual) // 5 pF Output Output Voltage Output Impedance ± 1.5 V (50 Ω Load) 50 Ω Bias Output Bias Output Voltage Range Bias Output Impedance ± 12 V, adjustable by Bias-Trimpot 10 kΩ // 1 µF Power Supply Supply Voltage Supply Current ± 15 V ± 70 mA typ. Case Weight Material 210 gr. (0.5 lbs) AlMg4.5Mn, nickel-plated 5 SOPHISTICATED TOOLS FOR SIGNAL RECOVERY DB-E-0209-25 / R 29 / MD / Date: 29.08.03 / 3 Pages Datasheet HCA-20M-100K-C High-Speed Current Amplifier Specifications (continued) Temperature Range Storage Temperature Operating Temperature -40 ... +100 °C 0 ... +60 °C Absolute Maximum Ratings Input Voltage Input Voltage Transient Power Supply Voltage ±5V ± 3.5 kV (Pulsewidth 10 ns) ± 22 V Connectors Input BNC Output BNC Power Supply 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 Photoconductive Mode: Best Choice for High-Speed Applications and optimum Signal To Noise Performance. U se ad ditio na l Bypass C apacitor close to D e te ctor (~ 100 n F, C e ra m ic) STABILIZ E D BIAS VO LTAG E O U TP U T HCA CURRENT IN P U T H ig h -S pee d C urren t to Voltag e C onve rter I/U C onn ect the D e te ctor a s close as p ossible to th e Am plifier. +1 2 V BIAS 10 kΩ 4 70 nF -1 2 V A Z 0 1 -0 2 0 1 -2 0 SOPHISTICATED TOOLS FOR SIGNAL RECOVERY Page 2 Datasheet HCA-20M-100K-C High-Speed Current Amplifier Dimensions 94 mm 87 mm 15 mm 74 mm OUT 12 mm 51 mm HCA 44 mm IN POWER 22 mm ∅ 3.3 mm 27 mm 14 mm 41 mm DZ01-0201-22 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: [email protected] 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 other 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