Input line (+,-), Output line (+,-) on ADL 5391

Hi, I will use ADL 5391 for application of analog multiplier. First, a pair of three pairs of input lines of ADL5391, Must XP(X PLUS)  and XM (X MINUS) be connected using a resistor outside of ADL5391 OR not connected ?
According to Fig 12. basic multiplier connections of 'AD633JN' datasheet,
the input line of XP placed on outside of AD633JN is separated with XM.

Is following basic multiplier connections of 'AD633JN' datasheet is right ?
Second, The two output lines outside of ADL5391, Must WP(W PLUS) be
separated with WM(W MINUS) OR
not separated ?
Third, Must the three pins of VMID, ENBL and GADJ placed outside of ADL5391 be connected to each other  outside of ADL5391 OR not connected ?
Thank you.

  • 0
    •  Analog Employees 
    on Jun 12, 2017 7:56 PM
    • For the ADL5391, you do not have to connect Xp and Xn via a resistor; basic connections are found on page 10 of the datasheet.
    • For the Wp and Wn pins, they are a differential output so you should not connect them directly together; you can connect a differential load resistor across the pins as shown in Figure 23
    • You do not want to connect VMID, ENBL and GADJ together:
      • VMID is a reference voltage output; you need to install a decoupling capacitor to ground on this pin
      • ENBL is the chip enable pin; pulling the pin to VCC will enable the part, and pulling the ground will disable
      • GADJ is the gain scaling pin; either leave this pin open for 1x scaling or apply a DC voltage for particular gain scaling (please see Figure 5)