MA4SW410 Datasheet, PDF (6/6 Pages) Tyco Electronics – SP4T Monolithic PIN Diode Switch

SP4T PIN Diode Switch
MA4SW410
V 1.00
Operation of the MA4SW410 Switch
Operation of the MA4SW Series of PIN Switches is achieved by the Simultaneous Application of Negative DC Current to the Low
Loss Port and Positive DC current to the Remaining Isolated Switching Ports as shown in Figure1. The Backside Area of the Die is
the RF and DC Return Ground Plane. The DC Return is achieved on Common Port J1. The DC Control Currents should be supplied
by Constant Current Sources. The 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 | -2 V | 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.
Figure 1:2 - 18 GHz Bias Network
J1
39 pF
100 ohms
22 nH
22 pF
DC Bias
39 pF
22 nH
J5
J2
22 pF
J4
J3
HMIC Switch Die
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or information contained herein without notice.
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