The Ultimate Low-Noise Current Amplifier
DLPCA-200
- Transimpedance Gain from 103 to 1011 V/A
- Input Noise Down to 4.3 fA/√Hz
- Bandwidth up to 500 kHz
- Rise Time down to 700 ns
- Bias-Voltage Adjustable
- Manual and Remote Control
The Ultimate Low-Noise Current Amplifier
Packed with features the DLPCA-200 Variable Gain Transimpedance Amplifier is designed for a wide range of applications that require the conversion of small currents into usable voltages. It is ideally suited, for example, for DC measurements, time resolved measurements down to the μs-region and as the preamplifier for photodiodes or lock-in systems. The DLPCA-200 offers virtually all of the features that can be expected from a high-end current amplifier including selectable transimpedance gain from 103 to 1011 V/A, switchable AC/DC-coupling, adjustable bias-voltage and offset, switchable 10 Hz lowpass filter and the capability of manual and opto-isolated remote control. All this in a rugged, compact EMI-shielded case, designed with the user in mind and built to guarantee trouble-free operation even in very rough and noisy environments.
Bandwidth and Frequency Response independent of Source Capacitance
Unlike similar amplifiers available the DLPCA-200 requires no particular adaptation, such as frequency compensation for different sources. In addition, it provides maximum speed even in high gain settings. At the highest gain setting of 1011 V/A it provides a 3 dB-bandwidth of 1.2 kHz and a 300 ?s rise time. For those applications not requiring the full bandwidth, the unit has a switchable 10 Hz lowpass filter to eliminate wideband noise and thus allowing accurate and ultra low-noise DC current measurements down to femtoAmperes.
Applications for DLPCA-200 Current Amplifier
- Photodiode and Photomultiplier Amplifier
- Scanning Tunneling Microscopy (STM)
- Spectroscopy
- Charge Amplifier
- Ionization Detectors
- Preamplifier for Lock-Ins, A/D-Converters etc.
Low Noise Input/Output Cable: FEMTO 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
| Model | DLPCA-200 | |||||||||||||
| Performance Range | Low Noise | High Speed | ||||||||||||
| Transimpedance [V/A] | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 105 | 106 | 107 | 108 | 109 | 1010 | 1011 |
| Bandwidth [- 3 dB] [kHz] | 500 | 500 | 400 | 200 | 50 | 7 | 1.1 | 500 | 500 | 400 | 200 | 50 | 7 | 1.1 |
| Rise Time(10%-90%) | 700ns | 700ns | 900ns | 1.8μs | 7μs | 50μs | 300μs | 700ns | 700ns | 900ns | 1.8μs | 7μs | 50μs | 300μs |
| Equ. Input Noise [/Hz1/2] | 20 pA | 2.3 pA | 450 fA | 130 fA | 43 fA | 13 pA | 4.3 fA | 13 fA | 1.8fA | 440 fA | 130 fA | 43 fA | 13 fA | 4.3 fA |
| Accuracy Performance | Gain +1 %, Flatness 0.1 dB | |||||||||||||
| Lowpass Filter | Switchable to 10 Hz | |||||||||||||
| Output Performance | +10 V >1MΩ load | |||||||||||||
| BIAS Voltage | Adjustable +10 V, max. 22 mA, Connected to BNC-Shield, switchable to GND | |||||||||||||
| Power Supply | +15 V, +120 mA/-80 mA Typ. | |||||||||||||
| Control Interface | 5 Opto-Isolated Digital Inputs, TTL/CMOS compatible, Analog Offset Control Voltage Input | |||||||||||||
| Interface Software Option | LUCI-10 Control Interface Software & Hardware Option | |||||||||||||
| Case | 170 x 60 x 45 mm (L x W x H), Weight 320 g (0.74 lbs) | |||||||||||||
| Bandwidth and rise/fall times are independent of detector capacitance up to 1 nF. Offset adjustable by trimpot or external control voltage. LED overload indication. Input protected against +3 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. | ||||||||||||||