High-Speed Current Amplifier
Features
Bandwidth and Frequency Response Independent of
Detector Capacitance (up to 500 pF)
Low Noise 3.5 pA/√Hz Equivalent Input Noise Current
Bandwidth DC ... 4 MHz
Transimpedance (Gain) 5 x 105
V/A
Protection against ± 3.5 kV Transients
Applications
Photodiode and Photomultiplier Amplifier
Spectroscopy
Charge Amplifier
Ionisation Detectors
Preamplifier for Lock-Ins, A/D Converters, etc.
Specifications
Test Conditions
Vs = ± 15 V, Ta = 25°C
Gain
Transimpedance
5 x 105 V/A (@ 50 Ω load)
Gain Accuracy
± 1 %
Frequency Response
Lower Cut-Off Frequency
DC
Upper Cut-Off Frequency (- 3 dB)
4 MHz
Rise / Fall Time (10 % - 90 %)
90 ns
Gain Flatness
± 0.3 dB
Input
Equ. Input Noise Current
3.5 pA/√Hz (@ 100 kHz)
Equ. Input Noise Voltage
0.8 nV/√Hz (@ 100 kHz)
Input Bias Current
18 µA typ.
Input Bias Current Drift
0.8 nA / K
Offset Current Compensation
± 6 µA adjustable by offset trimpot
Input Current Range
± 3 µA (for linear amplification)
Input Offset Voltage
3 mV
DC Input Impedance
50 Ω (virtual) // 5 pF
Output
Output Voltage Range
± 1.5 V (@ 50 Ω load) for linear operation and low harmonic distortion
Output Impedance
50 Ω (terminate with 50 Ω load for best performance)
Bias Output
Bias Output Voltage Range
± 12 V, adjustable by bias trimpot
Bias Output Impedance
10 kΩ // 1 µF
Power Supply
Supply Voltage
± 15 V
Supply Current
± 50 mA typ. (depends on operating conditions, recommended power supply capability minimum ± 150 mA)
Case
Weight
210 g (0.5 lbs)
Material
AlMg4.5Mn, nickel-plated
Temperature Range
Storage Temperature
-40 ... +100 °C
Operating Temperature
0 ... +60 °C
Absolute Maximum Ratings
Input Voltage
± 5 V
Input Voltage Transient
± 3.5 kV (pulsewidth 10 ns)
Power Supply Voltage
± 22 V
Connectors
Input
BNC
Output
BNC
Power Supply
LEMO series 1S, 3-pin fixed socket
Application Diagrams
Photo Detector Biasing in Photoconductive Mode: Best choice for high speed applications and optimum signal to noise performance.
Dimensions
商品属性 [频率] 4MHz [互导倒数] 5 x 105 V/A [上升时间] 90ns