Ultra-Low-Noise Current Amplifier
Features
-Switchable transimpedance (gain) 1 x 1012 V/A and 1 x 1013 V/A
- Extremely low input noise current of 0.18 fA/ÖHz
- Rise time 0.2 s
- Switchable low pass filter 2 Hz, 0.3 Hz and 0.1 Hz
- Protection against ±2 kV transients
Applications
- Very sensitive current and charge measurements
- Spectroscopy
- Photodiode amplifier
- Conductive atomic force microscopy (cAFM)
- Amplifier for ionization and charge detectors
- Characterization of active electronic components
- Preamplifier for oscilloscopes, A/D converters, digital voltmeter etc.
Specif ications
Test Conditions
VS=±15 V, TA = 25°C
Warm-up 20 minutes (min. 10 minutes recommended)
Gain
Transimpedance
1 x 1012 V/A and 1 x 1013 V/A (@ ≥1 MΩ load)
Accuracy
±2 %
Frequency Response
Lower cut-off frequency
DC
Upper cut-off frequency (–3 dB)
2 Hz, 0.3 Hz and 0.1 Hz
Rise- / Fall-Time (10 % - 90%)
0.2 s, 1 s and 5 s
Input
Equ. input noise current
0.18 fA/√Hz (@ 0.2 Hz)
Integrated input noise
0.3 fA peak-peak (@ 0.1 Hz bandwidth setting)
0.6 fA peak-peak (@ 0.3 Hz bandwidth setting)
2 fA peak-peak (@ 2 Hz bandwidth setting)
Input bias current
20 fA typ. / 30 fA max.
Input bias current drift
factor 2 / 10 °C
Offset compensation range
±50 fA, adjustable by offset trimpot
Max. input current
±10 pA (for linear amplification @ 1 x 1012 V/A gain)
±1 pA (for linear amplification @ 1 x 1013 V/A gain)
Input offset voltage
<0.5 mV
DC input impedance
1 kΩ (virtual) // 5 pF
Output
Output voltage
±10 V (@ ≥1 MΩ load)
Output impedance
50 Ω (terminate with ≥1 MΩ load for best performance)
Max. output current
±10 mA (for linear amplification)
Power Supply
Supply voltage
±15 V
Supply current
±15 mA typ. (depends on operating conditions, recommended
power supply capability minimum ±50 mA)
Case
Weight
210 g (0.5 lbs)
Material
AlMg4.5Mn, nickel-plated
emperatureT
Range Storage temperature
–40 ... +100 °C
Operating temperature
0 ... +60 °C
Absolute Maximum Ratings
Input voltage
±10 V
Power supply voltage
±20 V
Transient input voltage
±2 kV human body model (HBM)
Connectors
Input
BNC
Output
BNC
Power supply
Lemo®series 1S, 3-pin fixed socket
(mating plug type: FFA.1S.303.CLAC52)
Application Diagrams
Photo detector biasing in photovoltaic mode:
Use for low speed applications and minimum dark current.
Dimensions
商品属性 [上升时间] 0.2 s [频率] 2 Hz [互导倒数] 1012 and 1013 V/A