Logarithmic
Wideband
Voltage Amplifier
HLVA-100
  • Wide Dynamic Range up to 80 dB
  • DC coupled input
  • Switchable Input Range
    ±20 µV ... ±200 mV
    and ±200 µV ... 2V
  • Rise/Fall Time 5 ns
  • Input Noise 2 nV/√Hz
  • Local and Remote Control
  • Integrated Sample & Hold Baseline Correction

General Description


The FEMTO HLVA-100 offers a wide dynamic range of up to 80 dB. With a DC coupled input and a rise and fall time of just 5 ns the HLVA-100 is the ideal tool for the measurement of fast and high dynamic pulses. The input voltage noise is extremely low with just 2 nV/√Hz. The logarithmic gain curve offers high gain for small input signals and relatively low gain for high input signals. Therefore the HLVA-100 is the ideal amplifier for signals with high dynamic range and applications in which a signal compression is desired.

Input Offset

The HLVA-100 provides 3 possibilities of an input offset voltage correction (baseline correction). All three methods cancel both temperature drift dependent offset and small source voltage offset:
  • Manual Null Adjust by Trimpot
  • Remote Null Adjust by ± 10 V Control Voltage
  • Baseline Correction Loop to Perform Remote Auto-Null
Applications
  • LIDAR Systems
  • Signal Compression
  • Time-Resolved Pulse and Transient Measurements
  • Mass Spectroscopy
  • Particle Detection
Model
HLVA-100
Input Voltage Range ±20 µV ... ±200 mV and ±200 µV ... ±2 V
Dynamic Range

Selectable by Switch
Typ. 60 dB (for Accurate Amplitude Measurement)
Max. 80 dB (for Signal Detection)
Scaling 12,5 mV/dB, 250 mV/Decade (@ 50 Ω Load)
Linearity ±1 dB (for Pulse of Min. 20 ns Pulse Width)
Input Noise Voltage 2 nV/√Hz
Input Voltage Drift 0.6 µV/°C
Input/Output 50 Ω, BNC
Rise/Fall Time 5 ns @ 40 dB Step
Output Voltage Range + 50 ... + 1075 mV typ. @ 50 Ω Load
(if Output is Adjusted to 1 V at 100 mV Input)
Output Offset Voltage Range ± 500 mV, Adjustable by Offset-Trimpot
Baseline Correction Acquisition Time 30 µs (Min. Sample Pulse Width)
Baseline Hold Droop Rate 1 µV/s (typ. @ 25°C)
Loop Cut-Off Frequency 1.5 kHz
Power supply ± 15 V, +100 mA/-150 mA,
Digital Control TTL, CMOS, Opto-Isolated
View and Download Datasheet 117 kB
Offset adjustable by trimpot or external control voltage. 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.
 
Typical Performance Characteristics


 

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