High-Speed Current Amplifier
Features
Bandwidth DC ... 100 MHz
Transimpedance (Gain) 5 x 104
V/A
Suitable for High Source Capacitance up to 20 pF
Low Equivalent Input Noise Current of 3.8 pA/√Hz
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 104 V/A (@ 50 Ω load)
Gain Accuracy
± 2 %
Frequency Response
Lower Cut-Off Frequency
DC
Upper Cut-Off Frequency (- 3 dB)
100 MHz (± 10 %, @ Csource 2 to 10 pF )
80 MHz (± 10 %, @ Csource 11 to 20 pF)
Max. Source Capacitance
20 pF (incl. cable, e.g. typical coax cable 1 pF/cm)
Rise / Fall Time (10 % - 90 %)
3.4 ns (@ Csource 2 to 10 pF)
4.0 ns (@ Csource 11 to 20 pF)
Gain Flatness
± 0.3 dB
Input
Equ. Input Noise Current
3.8 pA/√Hz (@ 10 MHz)
Equ. Input Noise Voltage
0.9 nV/√Hz (@ 10 MHz)
Equ. Integrated Noise
0.6 µA peak-peak
Input Bias Current
12 µA typ.
Input Bias Current Drift
3 nA / °C
Offset Current Compensation
± 40 µA adjustable by offset trimpot
Input Current Range
± 30 µA (for linear amplification)
Input Offset Voltage
< 1 mV
DC Input Impedance
56 Ω (virtual) // 5 pF
Output
Output Voltage Range
± 1.5 V (@ 50 Ω load) for linear operation and low harmonic distortion
Max. Output Voltage Range
± 1.7 V (@ 50 Ω load)
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
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.
Typical Performance Characteristics
Frequency Response
Noise Spectrum
Note: Spectral noise data is measured at the amplifier output with open but shielded input. To determine the spectral input noise divide the measured output noise by the amplifier gain of 5 x 104 V/A, i.e.:
Marker
Frequency
Output Noise
Resulting Input Noise
1
10 MHz
190 nV/√Hz
3.8 pA√Hz
2
100 MHz
273 nV/√Hz
5.5 pA√Hz
Pulse Response to Square Wave Input Signal (with 16 times averaging)
Large Signal Response output signal for 50 MHz, 20 µA peak-peak input
signal (with 4 times averaging)
Small Signal Response output signal for 1 MHz, 500 nA peak-peak square
wave input signal (without (top) and with 64 times averaging (bottom))
Dimensions
商品属性 [频率] 100MHz [互导倒数] 5 x 104 V/A [上升时间] 3.5ns