Variable-Gain High-Speed Current Amplifier
The Ultimate High Speed Current Amplifier
DHPCA-100 Series
The DHPCA-100 variable gain high speed transimpedance current amplifier is the perfect choice for applications that require the conversion of small electrical currents into usable voltages at bandwidths up to 200 MHz. It is ideally suited for DC- and AC measurements up to 200 MHz, time resolved measurements down to the ns-region and as the preamplifier for fast photodetector signals.
- Transimpedance Gain from 102 to 108 V/A
- New: Bandwidth up to 200 MHz
- Rise Time down to 1.8 ns
- Internal Signal Filters
- Adjustable Bias Voltage
- Manual and Remote Control
The DHPCA-100 offers many features including selectable gain from 102 to 108 V/A, switchable AC/DC-coupling, adjustable offset for baseline correction, adjustable bias voltage for use with fast photodiodes, switchable 10 MHz and 1 MHz lowpass filters and the capability of both manual and remote control. With its rugged and compact EMI-shielded case the DHPCA-100 is the ideal universal high speed amplifier for a broad range of applications.
Bandwidth and Frequency Response
The DHPCA-100 provides an optimum combination of gain and bandwidth. At the gain setting of 103 V/A it provides an extraordinary high 3 dB-bandwidth of 200 MHz and even at the highest gain setting of 108 V/A the upper cut-off frequency is still an excellent 220 kHz. For those applications not requiring the full bandwidth the unit has a switchable 10 MHz and 1 MHz lowpass filter to minimize broadband noise.
Applications
- Photodetector Amplifier
- Fast Ionization Detection
- Spectroscopy
- Preamplifier for Oscilloscopes, A/D-Converters and RF Lock-In Amplifiers.
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
Selector for Variable Gain, High Speed Current Amplifiers
| Model | DHPCA 100 | |||||||||||
| Performance Range | Low Noise | High Speed | ||||||||||
| Transimpedance [V/A] | 102 | 103 | 104 | 105 | 106 | 107 | 103 | 104 | 105 | 106 | 107 | 108 |
| Bandwidth [- 3 dB] [MHz] | 200 | 80 | 14 | 3.5 | 1.8 | 0.22 | 175 | 80 | 14 | 3.5 | 1.8 | 0.22 |
| Rise Time(10%-90%) | 1.8ns | 4.4ns | 25ns | 0.1μs | 0.2μs | 1.6μs | 2.0ns | 4.4ns | 25ns | 0.1μs | 0.2μs | 1.6μs |
| Equ. Input Noise [/Hz1/2] | 200 pA | 16 pA | 2.1 pA | 500 fA | 170 fA | 60 pA | 140 pA | 6.0 pA | 1.5 pfA | 450 fA | 150 fA | 55 fA |
| Lowpass Filter | Switchable to 1 MHz, 10 HMz or Full Bandwidth | |||||||||||
| Output Performance | ±1 V @ 50Ω load | |||||||||||
| BIAS Voltage | Adjustable +10 V, max. 22 mA, Connected to Shield of BNC Input Socket, switchable to GND | |||||||||||
| Power Supply | ±15 V, +110 mA/-90 mA Typ. | |||||||||||
| Control Interface | 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) | |||||||||||
| 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. | ||||||||||||