Datasheet
HCA-1M-1M-C
High Speed Current Amplifier
Features
Bandwidth and Frequency Response Independent of
Detector Capacitance (up to 2 nF)
Low Noise 3.5 pA/√
√Hz Equivalent Input Noise Current
Bandwidth DC ... 1 MHz
6
Transimpedance (Gain) 1 x 10 V/A
Protection against ± 3.5 kV Transients
Applications
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
1 x 10 V/A (@ 50 Ω load)
±1%
Frequency Response
Lower Cut-Off Frequency
Upper Cut-Off Frequency (- 3 dB)
Rise / Fall Time (10 % - 90 %)
Gain Flatness
DC
1 MHz
350 ns
± 0.3 dB
Input
Equ. Input Noise Current
Equ. Input Noise Voltage
Input Bias Current
Input Bias Current Drift
Offset Current Compensation
Input Current Range
Input Offset Voltage
DC Input Impedance
3.5 pA/√Hz (@ 100 kHz)
0.8 nV/√Hz (@ 100 kHz)
18 µA typ.
0.8 nA / K
± 6 µA adjustable by offset trimpot
± 1.5 µA (for linear amplification)
3 mV
50 Ω (virtual) // 5 pF
Output
Output Voltage Range
Output Impedance
± 1.5 V (@ 50 Ω load)
for linear operation and low harmonic distortion
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
6
DE-HCA-1M-1M-C/DS/R2/02NOV05/ Page 1 of 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-1M-1M-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
Input Voltage Transient
Power Supply Voltage
±5V
± 3.5 kV (pulsewidth 10 ns)
± 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
Bypass C apacitor
close to D e te ctor
(~ 100 n F, C e ra m ic)
STABILIZ E D
BIAS VO LTAG E
O U TP U T
HCA
CURRENT
IN P U T
H ig h -S pee d
C urren t to Voltag e
C onve rter
I/U
C onn ect the D e te ctor
a s close as p ossible
to th e Am plifier.
+1 2 V
BIAS
10 kΩ
4 70 nF
-1 2 V
A Z 0 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-1M-1M-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-1m-1m-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 3