High Speed
GHz Amplifier
Series HSA
  • Bandwidth up to 2 GHz
  • Gain up to 60 dB (50,000 V/A)
  • Input Noise 330 pV/√Hz (6.6 pA/√Hz)
  • Integrated Bias-T
  • Two Identical Signal Outputs (HSA-Y)
  • DC-Monitor Output
    (HSA-Y)

 

HSA-X
 
HSA-Y

 

Ultra-Low-Noise Amplification with High Gain at GHz Speed

The series HSA High-Speed Amplifiers offer a well-balanced combination of high gain, wide bandwidth up to 2 GHz and low noise making them ideal for time-resolved measurements with ultra-fast photodetectors. The compact housing design with threaded M4 and 8-32 holes allows easy integration in all optical bench systems.
Integrated Bias-T

In many applications - e.g. shot-noise-limited spectroscopy, heterodyne measurements etc. - the detector is subject to relatively high cw-power. As a result of this, a high level DC current is generated in the detector. This DC-current must have an electrical path to flow off to ground. The optimum solution in this case is a so-called Bias-T which allows high cw-power and guarantees an optimum signal-to-noise-ratio with very good 50 Ω matching. We have already integrated the Bias-T in our HSA High-Speed Amplifier Series. For detailed information please see our application note: DC-Path (Bias-T) for fast Photodetectors (ANE03.pdf).
HSA-X

The HSA-X comes in a very compact package with integrated Bias-T, SMA signal input and output connectors and a selection of fixed gain from 20 to 40 dB.
HSA-Y

In addition to the features of the HSA-X the HSA-Y is equipped with a DC-monitor for alignment and detector control or the measurement of low frequency background signal. Furthermore, the HSA-Y features two identical signal outputs enable triggering or signal control without the need for an external signal splitter. The gain of the HSA-Y can be selected as 20, 40 or 60 dB.
Applications
  • Preamplifier for Ultra-Fast Detectors (Microchannel-Plates, Photomultipliers, Avalanche-Photodiodes and PIN-Photodiodes)
  • Oscilloscope and Transient Recorder Preamplifier
  • Time-Resolved Pulse and Transient Measurements
  • Signal Booster in 50 Ω High Speed Systems
Model
HSA-X-2-20
HSA-X-2-40
HSA-X-1-40
Lower
Cut-Off-Frequency		 10 kHz 10 kHz 10 kHz
Upper
Cut-Off-Frequency		 2 GHz 2 GHz 1.1 GHz
Rise-/Fall-Time 180 ps 180 ps 320 ps
Gain/Trans-impedance

20 dB / 500 V/A

40 dB / 5,000 V/A 40 dB / 5,000 V/A
Input Noise
[//√Hz ]		 13 pA 13.4 pA 6.6 pA
Input VSWR 1 : 1.1 1 : 1.1 1 : 1.3
Output Voltage 2 V p-p 2 V p-p 2 V p-p
Input/Output 50 Ω, SMA 50 Ω, SMA 50 Ω, SMA
Power supply + 15 V, + 85 mA + 15 V, + 125 mA + 15 V, + 120 mA
View and Download
Datasheet		 72 kB 72 kB 72 kB
Case 54 x 43 x 22 mm (L x W x H), Weight 100 gr. (0.23 lb.)
Integrated bias-T circuit. 8-32 and M4 mounting threads. Power supply via 3-pin LEMO socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet!
 
Model HSA-Y-2-20 HSA-Y-2-40 HSA-Y-1-40 HSA-Y-1-60
Lower Cut-Off-Frequency 10 kHz 10 kHz 10 kHz 10 kHz
Upper Cut-Off-Frequency 2 GHz 2 GHz 1.1 GHz 1.1 GHz
Rise-/Fall-Time 180 ps 180 ps 320 ps 320 ps
Gain/Trans-
impedance		 20 dB /
500 V/A		 40 dB /
5,000 V/A		 40 dB /
5,000 V/A		 60 dB /
50,000 V/A
Input Noise
[/√Hz ] 		13.6 pA 13 pA 6.6 pA 6.6 pA
Input VSWR 1 : 1.16 1 : 1.2 1 : 1.45 1 : 1.4
Input 50 Ω, SMA 50 Ω, SMA 50 Ω, SMA 50 Ω, SMA
Power supply
± 15 V
+ 160 / - 10 mA
± 15 V
+ 185 / - 10 mA		 ± 15 V
+ 200 / - 10 mA		 ± 15 V
+ 180 / - 10 mA
View and Download Datasheet 239 kB 239 kB 239 kB 239 kB
DC-Monitor Gain: 1 kV/A, Output Voltage: +/- 10 V (@ 10 kΩ Load), Bandwidth: DC - 100 kHz
Signal Output Two identical Signal Outputs, Output Voltage 2 V p-p, 50 Ω, SMA
Case 92 x 51 x 22 mm (L x W x H), Weight 180 gr. (0.41 lb.)
Integrated bias-T circuit for use with photodetectors. 8-32 and M4 mounting threads. Power supply via 3-pin LEMO socket. A mating connector is provided with the device. Optional power supply PS-15 available. For further information please view the datasheet or contact FEMTO.

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