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5185 Wideband Preamplifier

Model - 5185 Wideband Preamplifier
Model 5185 Wideband Preamplilfier

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/√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/√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 an external 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.
  • Documents +

  • Specifications +

    DC coupled wideband voltage amplifier with selectable x10 (20dB) or x100 (40dB) voltage gain and a maximum frequency response extending from DC to > 200 MHz. Single-ended input and single-ended output via BNC connectors.

    Line powered from model PS0108 power supply included with each unit.
    Configuration Single-ended. Front panel ground terminal provided
    50 Ω input
    1 MΩ input

    DC only
    DC or AC
    Impedance 50 Ω or 1 MΩ // 25 pF
    Frequency Response
    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
    1 MΩ input

    10 nV/√Hz @ 10 kHz
    30 nV/√Hz @ 10 kHz
    Rise and Fall Times
    50 Ω input

    < 2 ns
    1 M Ω input < 2.6 ns
    Max input voltage
    x10 gain
    x100 gain

    100 mV pk-pk
    10 mV pk-pk
    Gain x10 (20 dB) or x100 (40 dB)
    Gain Accuracy ±3% at 10 kHz
    Gain Stability ±250 ppm/*C
    Impedance 50 Ω
    Max voltage swing >1 V pk-pk
    Slow rate >2000 V/µs (unloaded)
    Polarity Non-inverting
    DC Stability 100 µV//ºC (referred to input)
    DC Offset Control Range
    µ 10 mV (referred to input)

    ±15 V or ±18 V DC @ 300 mA
    110 V AC or 240 V AC via external model PS0108 power supply included with unit
    (excluding connectors)

    8.25" wide x 11" deep x 3.5" high (210 mm wide x 279 mm deep x 89 mm high)
    Weight 6.4 lbs (2.9 kg) excluding power supply
  • Options +

    Item Model Number
    Rack Mount K0304
    Pack of 20 Alkaline Batteries PS0109
    Power Cable-
    Utilizes power from Lock-in Amplifier
  • Software +

    Item Model Number
    Acquire Software
    The software includes a powerful plotting engine that lets you show data just as you want it using a variety of line styles, allows data export to both text and CSV files, offers comprehensive clipboard support, and includes a context-sensitive help system
    Active X Control SRINSTCOMMS