Datasheet

LCA-S-400K-SI
Low-Noise Photoreceiver with
Si PIN PhotodiodeThe photoreceiver will be delivered without post holder and postFeatures

yyyyy

Large Area Si PIN Detector, 2.5 mm Active Diameter
Spectral Range 400 ... 1100 nm
7Amplifier Transimpedance (Gain) 1.0 x 10 V/A
6Max. Conversion Gain 6.2 x 10 V/W @ 900 nm
Bandwidth DC ... 400 kHz

Applications

yyy

Spectroscopy
General Purpose Opto-Electronic Measurements
Optical Front-End for Oscilloscopes, A/D Converters and Lock-In AmplifiersSpecifications

Test Conditions

Vs = ± 15 V, Ta = 25°CGain

Transimpedance
Max. Conversion Gain

1.0 x 10 V/A
6
6.2 x 10 V/W

Frequency Response

Lower Cut-Off Frequency
DCUpper Cut-Off Frequency (- 3 dB) 400 kHz
Rise- / Fall-Time (10% - 90%)
1 µs
Gain Flatness± 0.5 dB

Detector

Detector Material
Active Area
Spectral Response

Si PIN photodiode∅ 2.5 mm
400 ... 1100 nm

Input

Input Offset Compensation
Max. Optical Input Power± 300 nA, adjustable by offset trimpot
1.6 µW (for linear amplification @ 900 nm)

NoiseMin. NEP

130 fW/√Hz (@ 900 nm, 10 kHz)7(@ >10 kΩ load)(@ 900 nm)

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
DE_LCA-S-400K-SI_7/SP/21May07 / Page 1 of 3

Datasheet

LCA-S-400K-SI
Low-Noise Photoreceiver with
Si-PIN-PhotodiodeOutputOutput Voltage Range
Max. Output Current
Output Impedance
Output Noise± 10 V(@ ≥ 10 kΩ load)± 30 mA
50 Ω (terminate with ≥ 10 kΩ load for best performance)
10 mV peak-peak (@ 1 MΩ load, no signal on photodiode)Power Supply

Supply Voltage
Supply Current± 15 V± 40 mA typ.
(depends on operating conditions, recommended power
supply capability minimum ± 150 mA)

Case

WeightMaterial

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

Temperature Range

Storage Temperature
Operating Temperature-40 ... +100 °C
0 ... +60 °C

Absolute Maximum Ratings

Optical Input PowerPower Supply Voltage

10 mW± 22 V

Spectral Response
0.7

Photo Sensitivity [A/W]

0.6
0.5
0.4
0.3
0.2
0.1
0300

400

500

600

700

800

900

1000

1100

1200

Wavelength [nm]Connectors

Input

optical, free space, 25 mm ∅ round flange compatible
with microbench systems

Output

BNC

Power SupplyLEMO series 1S, 3-pin fixed socket
Pin 1:+ 15V
Pin 2:- 15V
Pin 3:GND
PIN 2-Vs

PIN 1+Vs
PIN 3
GND

SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Page 2

Datasheet

LCA-S-400K-SI
Low-Noise Photoreceiver with
Si-PIN-Photodiode

Dimensions∅ 3.2 mm

Photosensitive Surface

51.0 mm

4.7 mm
15.0 mm15.0 mm

44.0 mm

POWER

OPTICAL INOUTPUT

74.0 mm

M4

UNC 8-32

24.9 mm

4.7 mm

23.0 mm27.0 mm15.5 mm

12.7 mm84.0 mm

DZ-FWPR_1.cdr

FEMTO Messtechnik GmbHPaul-Lincke-Ufer 34
D-10999 Berlin x 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.deSpecifications 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 other 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