Logarithmic Wideband Voltage Amplifier
Features
Wide Dynamic Range typ. 60 dB, max. 80 dB,
5 ns Rise/Fall Time @ 40 dB step
Accuracy ± 1 dB @ pulse width of min. 20 ns
Switchable Input Range ± 20 µV ... ± 200 mV or ± 200 µV ... ± 2 V
DC coupled input
Local and Remote Control
Integrated Sample & Hold Baseline Correction
Applications
LIDAR systems
Signal Compression, Pulse Measurements
Time-Resolved Pulse and Transient Measurements
Mass Spectroscopy
Particle Detection
Block Diagram
Specifications
Test Conditions
Vs = ± 15 V, Ta = 25°C, System Impedance = 50 Ω
Dynamic Performance
Dynamic Range
typ. 60 dB (for accurate amplitude measurements) max. 80 dB (signal detection)
Input Voltage Range
± 20 µV ... ± 200 mV / ± 200 µV ... ± 2 V switchable
Scaling
12.5 mV/dB equals 250 mV/ decade (@ 50 Ω Load)
Linearity
± 1 dB (for pulse of min. 20 ns pulse width)
Pulse Response
Rise/Fall time
5 ns @ 40 dB step
Input
Input Impedance
50 Ω
Input Voltage Drift
0.6 µV/K
Equivalent Input Voltage Noise
2 nV/√Hz
Input BIAS Current
< 4 µA
Input Offset Voltage
± 2.5 mV, adjustable by Offset-Trimpot and external Control Voltage
Output
Output Impedance
50 Ω
Output Voltage Range
+50 ... +1075 mV typ. (@ 50 Ω Load) (if Output is adjusted to 1V at 100mV Input)
Output Offset
Voltage Range
± 500 mV, adjustable by Offset-Trimmer
Digital Control
Control Input Voltage Range
Low: - 0.8 ...+ 0.8 V High: + 3 ... + 12 V, TTL / CMOS compatible
Control Input Current
Low: 0 mA High: + 1.5 mA @ + 5 V (Input Range Control) + 7 mA @ + 5 V (Baseline Correction Control)
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
Ext. Offset Control
Control Voltage Range
± 10 V (for ± 2.5 mV Offset Control)
Offset Control Input Impedance
100 kΩ
Power Supply
Supply Voltage
± 15 V
Supply Current
+ 90 / -120 mA typ.
Stabilized Power
Supply Output
± 12 V / max. 100 mA, + 5 V / max. 50 mA
Case
Weight
320 gr. (0.74 lbs)
Material
AlMg4.5Mn, nickel-plated
Temperature Range
Storage Temperature
- 40 ... + 100 °C
Operating Temperature
0 ... + 60 °C
Absolute Maximum Ratings
Power Supply Voltage
± 20 V
Signal Input Voltage
± 3 V @ ± 2 V Input Range Setting - 3 V / + 300 mV @ ± 200 mV Input Range Setting
Digital Control Input Voltage
+ 16 V / - 5 V
Connectors
Input
BNC
Output
BNC
Power Supply
LEMO Series 1S, 3-pin fixed Socket
Pin 1: + 15V
Pin 2: - 15V
Pin 3: GND
Control Port
Sub-D 25-pin, female, Qual. Class 2
Pin 1: +12V (Stabilized Power Supply Output)
Pin 2: -12V (Stabilized Power Supply Output)
Pin 3: AGND (Analog Ground)
Pin 4: +5V (Stabilized Power Supply Output)
Pin 5 - 6: NC
Pin 7: Baseline Correction Output
Pin 8: Offset Control Voltage Input
Pin 9: DGND (Ground f. Digital Control Pin 10 - 25)
Pin 10: Digital Control Input: Input Voltage Range
Pin 11: Digital Control Input: Baseline Correction
Pin 12 - 25: NC
Remote Control Operation
Input Range Setting
Remote control input is opto-isolated and connected by logical OR to local switch setting. For remote control the switch setting, set the local switch to “ ± 2 V " and select the wanted setting via a bit-code at the digital input.
Input Range
Pin 10
± 2 V
Low
± 200 mV
High
Baseline Correction
The integrated auto-null function can be performed byremote digital control only.
The input is opto-isolated by a ultra-fast opto-coupler.
Please note the min. pulse width.
Function
Pin 11
Hold previous value
Low
Null Output
High
Typical Performance Characteristics
Logarithmic Response (@ ± 2 V Input Range Setting)
Dimensions
商品属性 [上升时间] 5 ns