Model 5185
Wideband Preamplifier
General
The model 5185 is a wideband voltage preamplifier with a frequency
response from DC to 200 MHz and switchable gain settings of x10 (20 dB)
or x100 (40 dB). It has a selectable input impedance of 50 Ω or
1 MΩ and a DC offset facility.
The 50 Ω frequency response extends from DC to 200 MHz
with an equivalent input noise of 10 nV/root Hz at 10 kHz. The 1 MΩ
response exceeds 100 MHz, has switch selected AC or DC coupling and
an equivalent input noise of 30 nV/root Hz at 10 kHz.
A ground switch allows the input signal to be isolated from the output
and an adjustable offset facility allows a DC offset on the input signal
to be subtracted before it reaches the amplifier output. An overload
detector is also provided.
The unit is powered from a remote line power supply module, model
PS0108, included with each instrument. Signal connections are made via the
front-panel BNC connectors.
The model 5185 will prove invaluable for users who need a compact, low
cost, high performance wideband preamplifier. It is an ideal accessory for
use with oscilloscopes, digitizers, signal averagers and boxcar averager
systems.
| Input |
|
|
Configuration |
BNC connector, single-ended.
Front panel ground terminal provided. |
|
Coupling |
|
|
50 Ω
Input |
DC only |
|
1 MΩ
Input |
DC or AC |
|
Impedance |
50 Ω or 1 MΩ //
25 pF |
|
Frequency Response |
0.5 Hz to 1 MHz |
|
50 Ω
Input |
DC to 200 MHz (±1 dB)
DC to 250 MHz (+1 to -3 dB) |
|
1 MΩ
Input DC |
DC to 100 MHz (±1 dB)
DC to 125 MHz (+1 to -3 dB) |
|
1 MΩ
Input AC |
5 Hz to 100 MHz (±1 dB)
5 Hz to 125 MHz (+1 to -3 dB) |
|
Equivalent input noise, rms. |
|
|
50 Ω
Input |
10 nV/root Hz @ 10 kHz |
|
1 MΩ
Input |
30 nV/root Hz @ 10 kHz |
|
Rise and Fall Times |
|
|
50 Ω
Input |
< 2 ns |
|
1 MΩ
Input |
< 2.6 ns |
|
Max input voltage |
|
|
x10 gain |
100 mV pk-pk |
|
x100 gain |
10 mV pk-pk |
|
Gain |
x10 (20 dB) or x100 (40 dB) |
|
Gain Accuracy |
±3% at 10 kHz |
|
Gain Stability |
±250 ppm/degree C |
| Output |
|
Impedance |
50 Ω |
|
Max voltage swing |
>1 V pk-pk |
|
Slew rate |
> 2000 V/µs
(unloaded) |
|
Polarity |
Non-inverting |
|
DC Stability |
100 µV/degree C
(referred to input) |
|
DC Offset Control Range |
± 10 mV (referred to
input) |
| Power |
External |
a) ±15 V or ±18
V DC @ 300 mA |
|
|
b) 110 V AC or 240 V AC via
external model PS0108 power supply included with unit |
| 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 |
6.4lbs (2.9 kg)
excluding power supply |
|
is
a trademark of AMETEK, Inc.