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  • High speed voltage amplifiers with bandwidth up to 2.5 GHz
  • Gain up to 60 dB (50,000 V/A)
  • Input Noise 330 pV/√Hz (6.6 pA/√Hz)
  • Integrated DC Path for Easy Operation with Fast Photodiodes
  • Two Identical Signal Outputs (HSA-Y)
  • DC-Monitor Output (HSA-Y)
HSA-X
HSA-Y

High speed voltage amplifiers offer ultra low-noise amplification with high gain at GHz speed

The HSA series high speed voltage 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 DC Path

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.

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 the HSA-X the HSA-Y high speed voltage amplifiers are 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 that 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

High Speed Voltage Amplifiers Selector:

ModelHSA-X-2-20HSA-X-I-2-40
(Old Model HSA-X-2-40)
HSA-X-1-40
Lower Cut-Off Frequency10 kHz10 kHz10 kHz
Upper Cut-Off Frequency [kHz]2.5 GHz2.2 GHz1.2 GHz
Rise/Fall Time
(10-90%)
140 ps160 ps290 ps
Gain/Transimpedance20 dB / 500 V/A40 dB / 5,000 V/A
(inverting)
40 dB / 5,000 V/A
Input Noise [/√Hz] 620 pV (12.4 pA)430pV (8.6 pA)310 pV (6.2 pA)
Input VWSR1.23:11.25:11.6:1
Output Voltage2.0 Vp-p2.0 Vp-p2.0 Vp-p
Input/Output50 Ω, SMA50 Ω, SMA50 Ω, SMA
Power Supply+ 15V, + 85mA+ 15V, + 125mA+ 15V, + 120mA
Case90 x 45 x 25 mm (L x W x H), Weight 100 gr. (0.23 lbs)
Integrated DC Path. 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.

ModelHSA-Y-2-20HSA-Y-2-40HSA-Y-1-40HSA-Y-1-60
Lower Cut-Off Frequency10 kHz10 kHz10 kHz10 kHz
Upper Cut-Off Frequency2 GHz1.9 GHz1.0 GHz1.1 GHz
Rise/Fall Time175 ps185 ps330 ps320 ps
Gain/Transimpedance20 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] 680 pV (13.6 pA)650 pV (13 pA)330 pV (6.6 pA)330 pV (6.6 pA)
Input VSWR1.151.21.451.4
Output Voltage2.5 Vp-p1.7 Vp-p2.0 Vp-p2.3 Vp-p
Input50 Ω, SMA50 Ω, SMA50 Ω, SMA50 Ω, SMA
Signal OutputTwo identical signal outputs, 50 Ω, SMA, Output Voltage 2 Vp-p (@ 50 Ω Load)
Monitor OutputGain: 1,000 V/A, Output Voltage: +/- 10 V (@ ≥1 MΩ load), Bandwidth: DC - 100 kHz, BNC
Power Supply± 15V, +190 mA/-10mA Typ
Case110 x 70 x 25 mm (L x W x H), Weight 180 gr. (0.41 lbs)
Integrated DC path. 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.

FEMTO Product Catalog

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