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N978

4 Channel Variable Gain Fast Amplifier

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Features

  • x10 Adjustable Gain (x1 Steps)
  • Input bandwidth up to 250 Mhz
  • 50 Ohm Input Impedance
  • ±2 V output dynamics
  • 50 Ohm loads driven
  • Cascadeable Channels
  • Rise/fall time smaller than 1.5 ns
  • I/O delay smaller than 3 ns
More info
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Overview

The CAEN Mod. N978 is a 4 channel fast rise time amplifier housed in a one unit wide NIM module; each channel features a voltage gain variable in the range 0 ÷ 10. Channels are non-inverting and bipolar: they amplify both positive and negative signals. Input bandwidth is 250 MHz for signals up to 50 mVpp and decreases for larger ones (up to 100 MHz @ 300 mVpp). Gain setting can be performed independently for each channel via four rotary handles. Channels can be cascaded in order to obtain larger gain values. Each channel is provided with three LEMO 00 connectors, one for the input and two bridged for the output. The board features a ±2 V output dynamics. 4 screw-trimmers (one per channel) allow the offset calibration which operates over a ±30 mV range.

Technical Specifications

Packaging

1U-wide NIM unit

Voltage gain

0 ÷ 10

Rise time

< 1.5 ns (unipolar input, ±25 mV max. amplitude)

Band width

DC to 250 MHz with ±25 mV input signal
DC to 100 MHz with ±150 mV input signal

Output dynamic range

±2 V

Max input amplitude

200 mV peak-to-peak

Inputs channels

4, DC coupled, 50 Ohm ± 2% impedance

Output channels

4 with Fan-Out of two, drive 50 Ohm load

Noise

< 50 µV RMS (referred to the input)

Offset nulling range

±30 mV (measured with 0 Ohm termination on input)

Interchannel insulation

50 dB

Input reflection

< 10%

I/O Delay

< 3 ns

Offset uniformity

±4 mV (typical)
±12 mV (maximum)

NOTE

Specifications measured with gain = 10

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Code Description
WN978XAAAAAA N978 - 4 Channel Variable Gain Fast Amplifier   RoHS

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