Datasheet
HCA-100M-50K-C
High Speed Current Amplifier
Features
y
y
y
y
Bandwidth DC ... 100 MHz
4
Transimpedance (Gain) 5 x 10 V/A
Suitable for High Source Capacitance up to 20 pF
Low Equivalent Input Noise Current of 3.8 pA/√Hz
Applications
y
y
y
y
y
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
5 x 10 V/A (@ 50 Ω load)
±2%
Frequency Response
Lower Cut-Off Frequency
DC
Upper Cut-Off Frequency (- 3 dB) 100 MHz
80 MHz
Max. Source Capacitance
20 pF
Rise / Fall Time (10 % - 90 %)
3.4 ns
4.0 ns
Gain Flatness
± 0.3 dB
4
(± 10 %, @ Csource 2 to 10 pF )
(± 10 %, @ Csource 11 to 20 pF)
(incl. cable, e.g. typical coax cable 1 pF/cm)
(@ Csource 2 to 10 pF)
(@ Csource 11 to 20 pF)
Input
Equ. Input Noise Current
Equ. Input Noise Voltage
Equ. Integrated Noise
Input Bias Current
Input Bias Current Drift
Offset Current Compensation
Input Current Range
Input Offset Voltage
DC Input Impedance
3.8 pA/√Hz (@ 10 MHz)
0.9 nV/√Hz (@ 10 MHz)
0.6 µA peak-peak
12 µA typ.
3 nA / °C
± 40 µA adjustable by offset trimpot
± 30 µA (for linear amplification)
< 1 mV
56 Ω (virtual) // 5 pF
Output
Output Voltage Range
Max. Output Voltage Range
Output Impedance
± 1.5 V
(@ 50 Ω load)
for linear operation and low harmonic distortion
± 1.7 V
(@ 50 Ω load)
50 Ω (terminate with 50 Ω load for best performance)
Bias Output Voltage Range
Bias Output Impedance
± 12 V, adjustable by bias trimpot
10 kΩ // 1 µF
Bias Output
DE-HCA-100M-50K-C_3/SP/R3/03May07/ Page 1 of 6
SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Great Britain: LASER COMPONENTS (UK) Ltd., Phone: +44 1245 491 499, Fax: +44 1245 491 801, info@lasercomponents.co.uk
France: LASER COMPONENTS S.A.S., Phone: +33 1 3959 5225, Fax: +33 1 3959 5350, info@lasercomponents.fr
Datasheet
HCA-100M-50K-C
High Speed Current Amplifier
Specifications (continued)
Power Supply
Supply Voltage
Supply Current
± 15 V
± 50 mA typ.
(depends on operating conditions, recommended
power supply capability minimum ± 150 mA)
Case
Weight
Material
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
±5V
± 22 V
Connectors
Input
Output
Power Supply
BNC
BNC
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
Bypa ss C ap acitor
clo se to D e te ctor
(~ 10 0 n F, C e ra m ic)
STA BIL IZ E D
BIA S VOLTAG E
O U TP U T
HCA
CURRENT
IN P U T
H ig h -Spe e d
C u rren t to Vo ltag e
C o nve rter
I/U
C o nn ect the D e te cto r
a s close as p ossible
to th e A m plifier.
+1 2 V
BIA S
1 0 kΩ
4 70 nF
-1 2 V
A Z0 1 -0 2 0 1 -2 0
Page 2
SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Great Britain: LASER COMPONENTS (UK) Ltd., Phone: +44 1245 491 499, Fax: +44 1245 491 801, info@lasercomponents.co.uk
France: LASER COMPONENTS S.A.S., Phone: +33 1 3959 5225, Fax: +33 1 3959 5350, info@lasercomponents.fr
Datasheet
HCA-100M-50K-C
High Speed Current Amplifier
Typical Performance
Characteristics
Frequency Response
Noise Spectrum
Note: Spectral noise data is measured at the amplifier output with open but shielded input.
To determine the spectral input noise divide the measured output noise by the amplifier gain
4
of 5 x 10 V/A, i.e.:
Marker
Frequency
Output Noise
Resulting Input Noise
⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
1
2
10 MHz
100 MHz
190 nV/√Hz
273 nV/√Hz
3.8 pA√Hz
5.5 pA√Hz
Page 3
SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Great Britain: LASER COMPONENTS (UK) Ltd., Phone: +44 1245 491 499, Fax: +44 1245 491 801, info@lasercomponents.co.uk
France: LASER COMPONENTS S.A.S., Phone: +33 1 3959 5225, Fax: +33 1 3959 5350, info@lasercomponents.fr
Datasheet
HCA-100M-50K-C
High Speed Current Amplifier
Typical Performance
Characteristics
(continued)
Pulse Response to Square Wave Input Signal
(with 16 times averaging)
Large Signal Response
output signal for 50 MHz, 20 µA peak-peak input signal
(with 4 times averaging)
Page 4
SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Great Britain: LASER COMPONENTS (UK) Ltd., Phone: +44 1245 491 499, Fax: +44 1245 491 801, info@lasercomponents.co.uk
France: LASER COMPONENTS S.A.S., Phone: +33 1 3959 5225, Fax: +33 1 3959 5350, info@lasercomponents.fr
Datasheet
HCA-100M-50K-C
High Speed Current Amplifier
Typical Performance
Characteristics
(continued)
Small Signal Response
output signal for 1 MHz, 500 nA peak-peak square wave input signal
(without (top) and with 64 times averaging (bottom))
Page 5
SOPHISTICATED TOOLS FOR SIGNAL RECOVERY
Great Britain: LASER COMPONENTS (UK) Ltd., Phone: +44 1245 491 499, Fax: +44 1245 491 801, info@lasercomponents.co.uk
France: LASER COMPONENTS S.A.S., Phone: +33 1 3959 5225, Fax: +33 1 3959 5350, info@lasercomponents.fr
Datasheet
HCA-100M-50K-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
12/07 / V1 / HW / femto/current/ hca-100m-50k-c.pdf
www.lasercomponents.com
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
Great Britain: LASER COMPONENTS (UK) Ltd., Phone: +44 1245 491 499, Fax: +44 1245 491 801, info@lasercomponents.co.uk
France: LASER COMPONENTS S.A.S., Phone: +33 1 3959 5225, Fax: +33 1 3959 5350, info@lasercomponents.fr
Page 6