Preliminary Datasheet

HCA-S-400M-SI

400 MHz Photoreceiver withSi PIN PhotodiodeThe picture shows the HCA-S-400M-SI-FS.
The photoreceiver will be delivered without post holder and post.
Featuresyyyyy

Si PIN Detector, 0.8 mm Active Diameter
Spectral Range 320 ... 1000 nm
Bandwidth DC ... 400 MHz
3Amplifier Transimpedance (Gain) 5.0 x 10 V/A
3Max. Conversion Gain 2.7 x 10 V/W @ 800 nm

Applications

yyyy

Fast Pulse and Transient Measurements
Fast Digital Links
Optical Triggering
Optical Front-End for Oscilloscopes and A/D Converters

Specifications

Test ConditionsVs = ± 15 V, Ta = 25°C

Gain

Transimpedance
Max. Conversion Gain

5.0 x 10 V/A
3
2.7 x 10 V/W

Frequency Response

Lower Cut-Off Frequency
Upper Cut-Off Frequency (-3 dB)
Rise/Fall Time (10% - 90%)
Gain Flatness

DC400 MHz
1.0 ns± 1 dB

Detector

Detector Material
Active Area
Spectral Response

Si PIN photodiode∅ 0.8 mm
320 ... 1000 nm

Input

Input Offset Compensation
Max. Optical Input Power
Min. NEP± 200 µA adjustable by offset trimpot
400 µW (for linear amplification, @ 800 nm)
40 pW/√Hz(@ 800 nm, 100 MHz)3(@ 50 Ω load)(@ 800 nm)(± 10 %)

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DE-HCA-S-400M-SI/SP/R2/26Jul2007 / Page 1 of 7

Preliminary Datasheet

HCA-S-400M-SI

400 MHz Photoreceiver withSi PIN PhotodiodeOutput± 1.0 V(@ 50 Ω load)
for linear operation and low harmonic distortion± 1.5 V(@ 50 Ω load)
50 Ω (terminate with 50 Ω load for best performance)
ca. 20 mV peak-peak (@ 50 Ω load, no signal on detector)

Output Voltage Range
Max. Output Voltage Range
Output Impedance
Output Noise

Power SupplySupply Voltage
Supply Current± 15 V± 55 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

20 mW± 22 V

Spectral Response
0.6

Photo Sensitivity [A/W]

0.5
0.4
0.3
0.2
0.1
0200300

400

500

600

700

800

900

1000

1100

Wavelength [nm]Connectors

Input
OutputPower Supply

optical, free space, 25 mm ∅ round flange, alternatively
FC or SMA fiber receptacle
BNC
LEMO series 1S, 3-pin fixed socket
Pin 1:+ 15VPin 2:- 15VPin 3:
GND
PIN 2-Vs

PIN 1+Vs
PIN 3GND

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Preliminary Datasheet

HCA-S-400M-SI

400 MHz Photoreceiver with
Si PIN PhotodiodeTypical Performance
Characteristics

Frequency Response

Noise Spectrum

Note: Spectral noise data is measured at the amplifier output with darkened photo diode.
To determine the spectral input noise divide the measured output noise by the amplifier
conversion gain.
Conversion gain (V/W) = amplifier gain (5,000 V/A) x photo sensitivity (A/W).
MarkerFrequency

Output Noise

Resulting Input Noise (NEP)⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯1
2100 MHz
380 MHz109 nV/√Hz
183 nV/√Hz40 pW/√Hz (@ 800 nm)
68 pW/√Hz (@ 800 nm)

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Preliminary Datasheet

HCA-S-400M-SI

400 MHz Photoreceiver with
Si PIN PhotodiodeTypical Performance
Characteristics(continued)

Pulse Response to Square Wave Input Signal(with 16 times averaging)

Large Signal Response
output signal for 100 MHz, 370 µW modulated optical input signal(with 4 times averaging)

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Preliminary Datasheet

HCA-S-400M-SI

400 MHz Photoreceiver with
Si PIN PhotodiodeTypical Performance
Characteristics(continued)

Small Signal Response
output signal for 3.7 µW modulated optical input signal, 1 MHz square wave
(without (top) and with 64 times averaging (bottom))

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HCA-S-400M-SI

400 MHz Photoreceiver with
Si PIN PhotodiodeAvailable Models

HCA-S-400M-SI-FS
HCA-S-400M-SI-FC
HCA-S-400M-SI-SMA

Dimensions

HCA-S-400M-SI-FS

Free-space input
FC fiber receptacle input
SMA fiber receptacle input

11,515,012,0dia. 3,2 mm

OFFSET

44,051,0PowerOPTICAL IN
15,015,0OUT

74,024,94,7

UNC 8-32

M414,314,327,315,53,584,0
all measures are in mm unless otherwise noted

HCA-S-FS_1

HCA-S-400M-SI-FC
21,515,012,0dia. 3,2 mm

OFFSET

44,051,0Power

15,0OPTICAL IN

15,0OUT

17,514,327,374,087,094,0
all measures are in mm unless otherwise noted

HCA-S-FC_1

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Preliminary Datasheet

HCA-S-400M-SI

400 MHz Photoreceiver with
Si PIN PhotodiodeHCA-S-400M-SI-SMA
21,515,012,0dia. 3,2 mm

OFFSET

44,051,0Power

15,0OPTICAL IN

15,0OUT

14,314,327,374,087,094,0
all measures are in mm unless otherwise noted

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.de

HCA-S-SMA_1

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 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

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