MA4SW510 Datasheet, PDF (5/5 Pages) Tyco Electronics – SP5T PIN Diode Reflective Switch

SP5T PIN Diode Reflective Switch
MA4SW510
V 2.00
Operation of the MA4SW510 Switch
The Simultaneous Application of Negative DC Current to the Low Loss Port and Positive DC current to the
Remaining Isolated Ports as shown in Figure 1 achieves operation of the MA4SW Series of PIN Diode Switches. The
Backside Area of the Die is the RF and DC Return Ground Plane. The DC Return is achieved on Common Port J1.
Constant Current Sources should supply the DC Control Currents. The diode voltages at these points will not exceed
+ 1.5 volts (1.2 volts typical) for Supply Currents up to + 50 mA. In the Low Loss State, the Series Diode must be
Forward Biased and the Shunt Diode Reverse Biased. For All the Isolated Ports, the Shunt Diode is Forward Biased
and the Series Diode is Reverse Biased. The Bias Network Design should yield > 30 dB RF to DC Isolation.
Best Insertion Loss, P1dB, IP3, and Switching Speed is Achieved by using a Voltage Pull-up Resistor in the DC
Return Path, ( J1 ). A Minimum Value of | -2V | is recommended at this Return Node, which is achievable with a
Standard , +/- 5 V TTL Controlled PIN Diode Driver. A Typical DC Bias Schematic for 2-18 GHz Operation is
shown in Figure 1.
Fig 1: 2—18 GHz Bias Network Schematic
J1
39 pF
100 Ohms
22 nH
22 pF
DC Bias
39 pF
22 nH
J6
J2
22 pF
J5
J4
J3
HMIC Switch Die
5
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