Variable Gain High Speed Current Amplifier DHPCA-100
Features
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]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 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.)
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.
商品属性 [频率] 0.22-200MHz [上升时间] 1.8ns-1.6us