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

 

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 minimize broadband noise.

 

Applications

• Current to voltage converter for current measurement
• 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.)

Datasheet

363 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.