Features
- Transimpedance amplifier with gain from 102 to 108 V/A
- Bandwidth up to 200 MHz
- Rise time down to 1.8 ns
- Internal signal filters
- Adjustable bias voltage
- Manual and remote control
| Model | DHPCA-100 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Performance Range | Low Noise | High Speed | ||||||||||||
| Transimpedance [V/A] |
102 | 103 | 104 | 105 | 106 | 107 | 103 | 104 | 105 | 106 | 107 | 108 | ||
| -3 dB Bandwitdh [MHz] | 200 | 80 | 14 | 3.5 | 1.8 | 0.22 | 175 | 80 | 14 | 3.5 | 1.8 | 0.22 | ||
| Rise Time (10 % - 90 %) | 1.8 ns | 4.4 ns | 25 ns | 0.1 µs | 0.2 µs | 1.6 µs | 2.0 ns | 4.4 ns | 25 ns | 0.1 µs | 0.2 µs | 1.6 µs | ||
| Equ. Input Noise [/√Hz] | 180 pA | 11 pA | 1.8 pA | 480 fA | 140 fA | 45 fA | 155 pA | 5.8 pA | 1.5 pA | 440 fA | 140 fA | 45 fA | ||
| Accuracy Performance | Gain ±1 % | |||||||||||||
| Low Pass Filter | Switchable to 1 MHz, 10 MHz or full bandwidth | |||||||||||||
| Output | ±1 V @ 50 Ω load | |||||||||||||
| Bias Voltage | ±10 V, max. 22 mA, connected to BNC-shield, switchable to GND | |||||||||||||
| Power Requirements | ±15 V, +110 mA / -90 mA typ., ±200 mA recommended | |||||||||||||
| Control Interface | Opto-isolated digital inputs, TTL/CMOS compatible, analog offset control voltage input | |||||||||||||
| Case | 170 x 60 x 45 mm (L x W x H), Weight 320 g (0.74 lb.) | |||||||||||||
| Datasheet |  |
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Offset adjustable by potentiometer 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 available. For further information please view the datasheet or contact FEMTO.
The ultimate high speed transimpedance amplifier
The DHPCA-100 variable gain transimpedance 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.
The DHPCA-100 offers many features including variable 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 low pass 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 low pass filter to minimise broadband noise.
Applications
- Current to voltage converter for current measurement
- Photodetector amplifier
- Fast ionisation detection
- Spectroscopy
- Preamplifier for oscilloscopes, A/D converters and RF lock-in amplifiers
English (UK)