Datasheet

LCA-2-10T
Ultra Low Noise Current Amplifier

1213Features

Switchable transimpedance (gain) 1 x 10 V/A and 1 x 10 V/A
Extremely low input noise current of 0.18 fA/√
√Hz
Rise time 0.2 s
Switchable low pass filter 2 Hz, 0.3 Hz and 0.1 Hz
Protection against ±2 kV transients

Applications

Very sensitive current and charge measurements
Spectroscopy
Photodiode amplifier
Conductive atomic force microscopy (cAFM)
Amplifier for ionization and charge detectors
Characterization of active electronic components
Preamplifier for oscilloscopes, A/D converters, digital voltmeter etc.

Specifications

Test Conditions

VS = ±15 V, TA = 25°C
Warm-up 20 minutes (min. 10 minutes recommended)

Gain

Transimpedance
Accuracy1 x 10 V/A and 1 x 10 V/A (@ ≥1 MΩ load)±2 %Frequency Response

Lower cut-off frequency
Upper cut-off frequency (–3 dB)
Rise- / Fall-Time (10 % - 90%)DC
2 Hz, 0.3 Hz and 0.1 Hz
0.2 s, 1 s and 5 s

Input

Equ. input noise current
Integrated input noise

Input offset voltage
DC input impedance

0.18 fA/√Hz (@ 0.2 Hz)
0.3 fA peak-peak (@ 0.1 Hz bandwidth setting)
0.6 fA peak-peak (@ 0.3 Hz bandwidth setting)
2 fA peak-peak (@ 2 Hz bandwidth setting)
20 fA typ. / 30 fA max.
factor 2 / 10 °C±50 fA, adjustable by offset trimpot
12±10 pA (for linear amplification @ 1 x 10 V/A gain)
13±1 pA (for linear amplification @ 1 x 10 V/A gain)<0.5 mV
1 kΩ (virtual) // 5 pF

OutputOutput voltage
Output impedance
Max. output current±10 V (@ ≥1 MΩ load)
50 Ω (terminate with ≥1 MΩ load for best performance)±10 mA (for linear amplification)

Power Supply

Supply voltage
Supply current±15 V±15 mA typ. (depends on operating conditions,recommended power supply capability minimum ±50 mA)

Input bias current
Input bias current drift
Offset compensation range
Max. input current

1213

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
DE-LCA-2-10T_R5/MG,JM/26MAY2016

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Datasheet

LCA-2-10T
Ultra Low Noise Current Amplifier

Specifications (continued)
CaseWeightMaterial

210 g (0.5 lbs)
AlMg4.5Mn, nickel-plated

Temperature Range

Storage temperature
Operating temperature–40 ... +100 °C
0 ... +60 °C

Absolute Maximum Ratings

Input voltage
Power supply voltage
Transient input voltage

±10 V
±20 V
±2 kV human body model (HBM)

Connectors

Input

BNC

Output

BNC

Power supply

Lemo series 1S, 3-pin fixed socket(mating plug type: FFA.1S.303.CLAC52)®

Pin 1:Pin 2:Pin 3:

+15V
–15V
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
CURRENTINPUT

Ultra-Low-Noise
Current to Voltage
Converter

I/V

AZ02-0 101-20

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
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Datasheet

LCA-2-10T
Ultra Low Noise Current Amplifier

Dimensions

9487

4451

1574

28.5

15.4

15

ø 3.2

all measures in mm unless otherwise noted
DZ-LCA-2-10T_R3

FEMTO Messtechnik GmbH
Klosterstr. 6410179 Berlin · Germany
Phone: +49 30 280 4711-0
Fax: +49 30 280 4711-11
Email: info@femto.de
www.femto.deSpecifications are subject to change without notice. Information provided herein is believed to be accurate andreliable. However, no responsibility is assumed by FEMTO Messtechnik GmbH for its use, nor for any infringementof patents or other rights of third parties which may result from its use. No license is granted by implication orotherwise under any patent or patent rights of FEMTO Messtechnik GmbH. Product names mentioned may also betrademarks used here for identification purposes only.
© by FEMTO Messtechnik GmbH · Printed in Germany

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