SP3T PIN Diode Switch

Rev. V1

MSW310x-310

3

3

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1. PIN diode DC reverse voltage to maintain high resistance in the OFF PIN diode is determined by RF frequency, incident power, and VSWR

as well as by the characteristics of the diode. The minimum reverse bias voltage values are provided in this datasheet. The input signal

level applied for small signal testing is approximately 0 dBm.

2. Switching Speed ( 50 % TTL – 10/90 % RF Voltage ) is a function of the PIN diode driver performance as well as the characteristics of the

diode. An RC “current spiking network” is used on the driver output to provide a transient current to rapidly remove stored charge from the

PIN diode. Typical component values are: R = 50 to 220 Ω and C = 470 to 1,000 pF. MACOMs MPD3T28125-700 is the recommended PIN

diode driver to interface with the MSW3100-310, MSW3101-310 SP3T switches.

Truth Table

Port

J0 - J1

Port

J0 - J2

Bias: J1

Bias: J2

Bias: J2

Bias: B1

Port

J0 - J3

Bias: B2

Bias: B3

Bias: J0

Low Loss

Isolation

0 V,

-100 mA

+27 V,

0 mA

+27 V,

0 mA

+27 V,

0 mA

Isolation

0 V,

-25 mA

0 V,

-25 mA

+5 V,

+100 mA

Isolation

Low Loss

+27 V,

0 mA

0 V,

-100 mA

+27 V,

0 mA

0 V,

-25 mA

Isolation

+27 V,

0 mA

0 V,

-25 mA

+5 V,

+100 mA

Isolation

Isolation

+27 V,

0 mA

+27 V,

0 mA

0 V,

-100 mA

0 V,

-25 mA

Low Loss

0 V,

-25 mA

+27 V,

0 mA

+5 V,

+100 mA

RF Bias Network Component Values

Part #

Frequency (MHz)

Inductors

DC Blocking Capacitors RF Bypass Capacitors

MSW3100-310

50 - 1000

4.7 µH

0.1 µF

0.1 µF

MSW3101-310

400 - 4000

82 nH

22 pF

270 pF