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Current Amplifiers
Variable-Gain Low-Noise
DLPCA-200
- Transimpedance
Gain from 103 to 1011 V/A
- Input Noise Down
to 4.3 fA/√Hz
- Bandwidth up to
500 kHz
- Rise Time down to
700 ns
- Bias-Voltage
Adjustable
- Manual and Remote
Control
The Ultimate Low-Noise Current Amplifier
Packed with features the DLPCA-200 Variable-Gain Transimpedance
Amplifier is designed for a wide range of applications that require the
conversion of small currents into usable voltages. It is ideally suited,
for example, for DC measurements, time resolved measurements down to the
µs-region and as the preamplifier for photodiodes or lock-in systems.
The DLPCA-200 offers virtually all of the features that can be expected
from a high-end current amplifier including selectable transimpedance
gain from 103 to 1011 V/A,
switchable AC/DC-coupling, adjustable bias-voltage and offset,
switchable 10 Hz lowpass filter and the capability of manual and opto-isolated
remote control. All this in a rugged, compact EMI-shielded case,
designed with the user in mind and built to guarantee trouble-free
operation even in very rough and noisy environments.
Bandwidth and Frequency Response independent of Source
Capacitance
Unlike similar amplifiers available the DLPCA-200 requires no
particular adaptation, such as frequency compensation for different
sources. In addition, it provides maximum speed even in high gain
settings. At the highest gain setting of 1011 V/A it provides
a 3 dB-bandwidth of 1.2 kHz and a 300 µs rise time. For those
applications not requiring the full bandwidth, the unit has a switchable
10 Hz lowpass filter to eliminate wideband noise and thus allowing
accurate and ultra low-noise DC current measurements down to
femtoAmperes.
Applications
Photodiode and Photomultiplier Amplifier
Scanning Tunneling Microscopy (STM)
Spectroscopy
Charge Amplifier
Ionization Detectors
Preamplifier for Lock-Ins, A/D-Converters etc.
Click Part # to view pdf datasheet.
| Model |
DLPCA-200 |
| Performance
Range |
Low Noise |
High Speed |
| Transimpedance [V/A] |
103 |
104 |
105 |
106 |
107 |
108 |
109 |
105 |
106 |
107 |
108 |
109 |
1010 |
1011 |
| Bandwidth [-
3 dB] [kHz] |
500 |
500 |
400 |
200 |
45 |
7 |
1.2 |
500 |
500 |
400 |
200 |
45 |
7 |
1.2 |
| Rise
Time(10%-90%) |
700
ns |
700
ns |
900
ns |
1.8
µs |
8
µs |
50
µs |
300
µs |
700
ns |
700
ns |
900
ns |
1.8
µs |
8
µs |
50
µs |
300
µs |
| Equ. Input
Noise [/Hz1/2] |
20
pA |
2.3
pA |
460
fA |
130
fA |
43
fA |
13
fA |
4.3
fA |
13
pA |
1.8
pA |
450
fA |
130
fA |
43
fA |
13
fA |
4.3
fA |
| Accuracy
Performance |
Gain ±1 %, Flatness 0.1 dB |
| Lowpass
Filter |
Switchable to 10 Hz |
| Output
Performance |
±10 V, ±30 mA |
| BIAS
Voltage |
±10 V, max. 22 mA, Connected to BNC-Shield, switchable to
GND |
| Power
Supply |
±15 V, +150 mA/-100 mA |
| Control
Interface |
5
Opto-Isolated Digital Inputs, TTL/CMOS compatible, Analog Offset Control Voltage
Input |
| Case |
150 x 55 x 40 mm (L x W x H), Weight 320 g (0.74 lbs) |
|
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
is available. For further information please view the
datasheet. |
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