Variable Gain High Speed
Current Amplifier
DHPCA-100
  • Transimpedance 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

 

The Ultimate High Speed Current 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 minimize broadband noise.

Applications
  • Photodetector Amplifier
  • Fast Ionization Detection
  • Spectroscopy
  • Preamplifier for Oscilloscopes, A/D Converters and RF Lock-In 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%)		 1.8 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]		 200 pA 16 pA 2.1 pA 500 fA 170 fA 60 fA 140 pA 6.0 pA 1.5 pA 450 fA 150 fA 55 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
212 kB
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 available. For further information please view the datasheet or contact FEMTO.

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