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.
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 minimize broadband noise.
|Performance Range||Low Noise||High Speed|
(−3 dB) [MHz]
(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
|220 pA||17 pA||2.2 pA||490 fA||140 fA||51 fA||155 pA||6.1 pA||1.5 pA||440 fA||140 fA||51 fA|
|Accuracy Performance||Gain ±1 %|
|Low Pass Filter||Switchable to 1 MHz, 10 MHz or full bandwidth|
|Output Performance||±1 V @ 50 Ω load|
|Bias Voltage||±10 V, max. 22 mA, connected to BNC-shield, switchable to GND|
|Power Supply||±15 V, +110 mA/−90 mA|
|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.)|
|View and Download Datasheet||264 kB|
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 photoreceiver series HSA-X-S was broadened by two models featuring an improvement in noise performance of up to 40%. The output reflection coefficient was reduced by 8 dB at the same time.
FEMTO® Messtechnik GmbH
Phone: +49-(0)30-280 4711-0
Fax: +49-(0)30-280 4711-11
© FEMTO 2016