Voltage Amplifiers: Logarithmic Wideband
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 Logarithmic Wideband Voltage Amplifier 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
Logarithmic Wideband Voltage Amplifiers
Click Part # to view pdf datasheet.
| Model | ||
| 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 Baseline Hold Droop Rate Loop cut-off frequency |
30
µs (min. sample pulse
width) 1 µV/s (typ. @25°C) 1.5 kHz |
| Power supply | ± 15 V, +100 mA/-150 mA, | |
| Digital Control | TTL, CMOS, opto-isolated | |
| 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 is available. For further information please view the datasheet. | ||
Typical Performance Characteristics
