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Variable Gain Ultra Low Noise Current Amplifier

  • 0.4 fA peak-peak noise
  • Very high dynamic range: Sub-fA to 1 mA (>240 dB)
  • Transimpedance (Gain) switchable from 1 x 104 to 1 x 1013 V/A
  • Bandwidth up to 450 Hz, Rise Time down to 0.8 ms – Independent of Source Capacitance (up to 10nF)
  • Adjustable Bias-Voltage on Input Relative to Ground
  • Compact Housing for use close to the signal source
  • Protection against +2kV transients
  • Local and Remote Control
  • East to use: Convert your standard digital voltmeter or DAQ Board to a high-end Digital Sub-Femotamperemeter


  • Photodetector amplifier
  • I/V characterization of small MOS structures
  • DC measurements of ultra low currents
  • Ionization detectors, mass spectrometry, quantum and biotech experiments
  • Spectroscopy
  • High resistance measurements

Low Noise Input/Output Cable: CAB-LN1 Low Noise Cable

The LUCI-10 amplifier interface allows remote control of FEMTO amplifiers and photoreceivers with a remote control capability from a standard Windows PC with USB port.

Variable Gain Current Amplifier Comparison

Performance RangePerformance Depending on Gain Setting
Transimpedance [V/A]1041051061071081091010101110121013
Bandwidth [- 3 dB] [kHz] 400400400400150150202011
Rise Time(10%-90%)0.8ms0.8ms0.8ms0.8ms2.3ms2.3ms17ms17ms350ms350 ms
Equ. Input Noise [/Hz1/2]45 pA45 pA0.45 pA0.45 pA15 fA15 fA1.3 fA1.3 fA0.2 fA0.2 fA
Lowpass FilterSwitchable to 0.1 Hz, 0.7 Hz or Full Bandwidth
Output Performance±10 V (@ ≥1MΩ load)
BIAS Voltage±10 V, Adjustable by Trimpot or External Control Voltage, max. 10 mA, Connected to Center Pin of BNC Input Socket
Power Supply±15 V, +70 mA/-15 mA Typ.
Control Interface4 Opto-Isolated Digital Inputs, TTL/CMOS compatible, Analog Bias Control Voltage Input
Interface Software OptionLUCI-10 Control Interface Software & Hardware Option
Case170 x 60 x 45 mm (L x W x H), Weight 320 g (0.74 lbs)
Offset adjustable by trimpot. LED overload indication. Input protected against ±2 kV transients. Output short-circuit protected. 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.

FEMTO Product Catalog 

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