MODEL 740 QUAD LINEAR FAN-IN/FAN-OUT

FEATURES
Four Independent Channels
Linear or Logic Fan-In of Four and Fan-Out of Six per Channel
Wideband - DC to 250 MHz
Fully Bipolar Operation to +/-2.5 Volts
DC Offset Control per Channel of +/-500 mVolts
Reliable - Both Inputs and Outputs are protected

DESCRIPTION

'Me Model 740 is a four channel, unity gain linear or logic fan-in/fan-out packaged in a single width NIM module. Four linear inputs allow summing of linear levels or pulses. Both inverted and noninverted output levels are produced simultaneously allowing very complex triggers to be fast and easy to develop. Direct coupling of all inputs and outputs eliminates the baseline shifts due to rate or duty cycle affects, while making the device useful for per- forming logic functions.

 INPUT CHARACTERISTICS
 general        Four LEMO connectors per channel, bipolar input; accepts
          positive or negative voltages.

 Impedance       50 ohms +/-2%, direct coupled input.

 Protection       Protected with clamping diodes, no damage will occur from
          transients of +/-100 Volts (+/-2 amps) for 1 usec or less duration.

 Reflections       Less than +/-4% for input risetime of 1 nsec.

 Overdrive Response     Recovery time of 20 nsec for a +/-10 Volt input.

 OUTPUT CHARACTERISTICS
 General        Six bridged LEMO output connectors per channel. Four non-
          inverted outputs and two inverted outputs-, low impedance
          voltage source output stage.

 Protection       Outputs can be continuously shorted to ground without suffer-
          ing damage.

 Output Voltage Swing     Bipolar outputs deliver over +/-2 Volts across four 50 ohm
          loads.

 DC  Offset      A front panel 15-turn potentiometer provides +/-500 mvolt
          adjustment. A front panel test point allows easy monitoring
          of the DC offset.
 GENERAL  PERFORMANCE
 Gain         Fixed gain of 1.0 +/-2% both inverted and noninverted.

 Stability       Better than +/-50 uVolt/'C from DC to 1 mHz, and +/-.05%/'C
          above 1 MHz.

 Linearity       +/-0.2% for +/-2 Volts across two 50 ohms loads or +/-1.5 Volts
          across four 50 ohm loads.

 Bandwidth       DC to 250 MHz, 3 db point 1 Volt peak to peak.
 Wideband Noise     Less than 400 uvolts RMS, referred to the input (15 nV/Hz^.5).

 Risetime        Typically 1. 3 nsec, for a 1 Volt output excursion.
 Crosstalk       Greater than 60 db, DC to 100 MHz.
 Power Supply Requirements   +6V @ 350 mA    +12V @ 160 mA
          -6V @ 350 mA    -12V @ 160 mA
          NOTE: All currents within NIM specification limits allowing
          full powered bin to be operated without overloading .