Dataasheet

LCA-2000-10G
Ult ra-Low
w-Noise Currennt Ampl ifierFeaturres

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Bandwidth aand Frequencyy Response Independent ofDetector-Caapacitance (up to 10 nF)
Extremely LLow Noise, 1.5 fA/√Hzf
Equivalent Input Noisee Current
DC ... 200 Hz
Bandwidth D
10Transimpeddance (Gain) 1 x 10 V/AApplications

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Photodiode-- and Photomultiplier-Amplifiier
Spectroscoppy
Charge-Ampplifier
Ionisation D
Detectors
Preamplifierr for Lock-Ins, A/D-Converterrs, etc.

Speciffications

TestT Conditions

Vs = ± 15 V, Ta
T = 25°CWarm-up 20 minutesm(min. 100 minutes recommmended)

GGain

Transimpedance
AccuracyA

1 x 10 V/A (>>10 kΩ Load)± 1%

FFrequency Respoonse

Loower Cut-Off Freequency
Upper Cut-Off Freequency
Rise- / Fall-Time
Gain Flatness

DC200 Hz (- 3 dBB)
2 ms (10% - 90%)9± 0.1 dB

InnputEqu. Input Noise CCurrent
Equ. Input Noise VVoltage
Innput Bias Currentt
Innput Bias Currentt Drift
OffsetO
Current CoompensationMax.
M Input Currennt
Innput Offset Voltagge
DC Input Impedannce

1.5 fA/√Hz (@ 10 Hz)
90 nV/√Hz (@ 10 Hz)
20 fA typ. / 30 fA max.
Factor 2 / 10 K
± 300 pA, Adjuustable by Offsett-Trimpot± 1 nA (Linear Amplification)< 0.5 mV
/ 5 pF
1 kΩ (Virtual) //O
OutputOutputO
Voltage
OutputO
ImpedanceeMax.
M Output Curreent± 10 V (>10 kΩΩ Load)
50 Ω (Terminaate with >10 kΩΩ for best Performmance)± 10 mA (Lineear Amplificationn)

PPower Supply

Supply Voltage
Supply Current± 15 V± 15 mA typ.

CCaseWeightW
MaterialM

210 gr. (0.5 lbs)
AlMg4.5Mn, niickel-platedTTemperature Rannge

Storage Temperatture
OperatingO
Tempe rature-40 ... +100 °C
0 ... +60 °C

10SOPHISTICATED TOOLS FOR SIG NAL RECOVERY
LCA-200-10G/MS/R
R5/07FEB12/ Page 1 of 3

Datasheet

LCA-200-10G
Ultra-Low-Noise Current Amplifier

Absolute Maximum Ratings

Input Voltage
Power Supply Voltage± 10 V± 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 3GND

Application Diagrams

Photo Detector Biasing in Photovoltaic Mode:Use for Low Speed Applications and Minimum Dark Current.
LCA

CURRENTIN P U T

U ltra-L ow -N o ise
C u rren t to Vo ltag eC o nve rterI/U

A Z0 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.
+ B IA S
VO LTAG E
U se ad ditio na l
Bypa ss C ap acitor
clo se to th e D etec to r(~ 10 0 n F, C e ra m ic)

LCA

CURRENTIN P U T

U ltra-L ow -N o ise
C u rren t to Vo ltag e
C o nve rter

I/U

A Z0 1 -0 1 0 1 -2 0

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Page 2

Datasheet

LCA-200-10G
Ultra-Low-Noise Current Amplifier

Dimensions

94.0 mm15.0 mm87.0 mm74.0 mm

LCA

OUT
51.0 mm

11.8 mm

44.0 mmINPOWER∅ 3.3 mm

DZ01-0101-21

FEMTO Messtechnik GmbH
Klosterstr. 64
10179 Berlin x Germany
Tel.: +49-(0)30-280 4711-0
Fax: +49-(0)30-280 4711-11
e-mail: info@femto.de
http://www.femto.de

14.0 mm27.0 mm

21.6 mm

Specifications are subject to change without notice. Information furnished herin is believed tobe accurate and reliable. However, no responsibility is assumed by FEMTO MesstechnikGmbH for its use, nor for any infringement of patents or ather rights granted by implicationor 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 RECOVERYPage 3