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Model 5182
Current Sensitive Preamplifier
General
The model 5182 is a current-to-voltage preamplifier of low noise and low
input impedance designed to amplify the extremely low low currents
encountered in such areas as photometry and semiconductor research. It has
four standard conversion factors but in addition includes a special
low-noise mode on the highest gain position for even better low current
measurement capability. The unit features two outputs, allowing both the
AC and DC components of the input signal to be independently monitored, so
that, for example, in a PMT application the bias current can be measured
separately from the signal current.
It can be powered from its own internally housed (alkaline) batteries,
an external low voltage supply (±15 V or ±18 V) or from the model
PS0108 remote line power supply (optional extra). This preamplifier can
also be powered from most of our range of lock-in amplifiers and from the
model 7310 noise rejecting voltmeter
The model 5182 is ideally suited to amplifying signals from current
sources such as electron multipliers, ion collectors, photomultipliers and
photodiodes.
Frequency Response (typical)
Input Impedance (typical)
Peak Input Current and Noise
Current (typical)
Gain
A/V |
Max DC Input
Current |
Noise Current at 1 kHz |
| 10-5 |
9 mA |
10 pA/root Hz |
| 10-6 |
900 µA |
5 pA/root Hz |
| 10-7 |
9 µA |
135 fA/root Hz |
| 10-8 |
900 nA |
45 fA/root Hz |
| 10-8, low noise |
90 nA |
15 fA/root Hz |
| Input |
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Configuration |
BNC connector, virtual
ground. |
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Coupling |
DC |
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Sensitivity |
Switch selectable (5
settings) |
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AC Output |
10-5, 10-6,
10-7, 10-8, 10-8 low noise A/V |
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DC Output |
10-3, 10-4,
10-6, 10-7, 10-8 A/V |
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Accuracy |
±2% |
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Stability |
±300 ppm/degree C |
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Impedance |
see plot above |
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Frequency Response |
lower limit 0.5 Hz;
upper limit depends on sensitivity setting, see plot above |
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Max DC current at input |
see table above |
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Max input without damage |
±15 V DC or 10 V
rms. AC @ 50 Hz |
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Noise |
see table above |
| Output |
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AC Output |
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Impedance |
450 Ω |
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Max
voltage swing |
> 10 V pk-pk |
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Slew rate |
> 22 V/µs |
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DC Output |
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Impedance |
10 kΩ |
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Max
voltage swing |
> ±9 V |
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Polarity |
Current flowing into the
input produces a positive output voltage |
| Power |
Internal |
Four 9 V alkaline
batteries provide approximately 15 hours of use |
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External |
a) ±15 V or ±18
V DC @ 25 mA |
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b) 110 V AC or 240 V AC via
optional external model PS0108 power supply |
| Dimensions
(excluding connectors) |
8.25" wide x 11"
deep x 3.5" high
(210 mm wide x 279 mm deep x 89 mm high) |
| Weight |
5.3 lbs. (2.4 kg)
excluding power supply |
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is
a trademark of AMETEK, Inc.