4

PIN Diode Driver for Series / Series High Power Switch

Rev. 5

MADR-008888-000100

• North America Tel: 800.366.2266 • Europe Tel: +353.21.244.6400

• India Tel: +91.80.43537383

• China Tel: +86.21.2407.1588

Visit www.macomtech.com for additional data sheets and product information.

M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make

changes to the product(s) or information contained herein without notice.

ADVANCED:

Data Sheets contain information regarding a product M/A-COM Technology Solutions

is considering for development. Performance is based on target specifications, simulated results,

and/or prototype measurements. Commitment to develop is not guaranteed.

PRELIMINARY:

Data Sheets contain information regarding a product M/A-COM Technology

Solutions has under development. Performance is based on engineering tests. Specifications are

typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.

Commitment to produce in volume is not guaranteed.

Driver and SPDT Schematic with +5V & +28V DC Power

7,8,9,10,11,12,13,14

7.

Forward Bias Diode Voltage:

Vf is 0.9V @ 22 mA; Vf is 1.0V @ 35 mA

8.

For 22 mA load current, R1 = 180 Ω @ VCC = 5.0V and 105 Ω @ VCC = 3.3V. For 35 mA load cur-

rent, R1 = 110 Ω @ VCC = 5.0V and 165 Ω @ VCC= 3.3V. Nominal power dissipation in the 180 Ω

and 110 Ω resistors are 87 mW and 135 mW.

9.

Reverse Bias is ~ 27V (This is the 28V supply minus approximately 1V on the diode).

10. M/A-COM PIN Diode Driver, MADR-008888-0001TR is recommended for usage with the MASW-

000823-12770T SPDT Switch.

11. The voltage at the common anode will be approximately 1.0V.

12. The current in through the back-biased diodes will be the leakage current for the diodes

13. C1-C5, L1-L3, R1, and the switch are discrete components that should be installed on the user’s

board. It is recommended that Coilcraft 0603CS-27NXJLW or equivalent be used for L1-L3 at 2 GHz

(values may vary based on the frequency).

14. There are 33 pF bypass capacitors included in the driver for the RX and TX ports. There are cases,

especially at higher frequencies, where the optional 12 pF bypass capacitors that are shown on the

schematic are needed.

C2

100 pF

100V

L3

27 nH

RX

C4

100 pF

C1

100 pF

100V

L2

27 nH

Cbypass

12 pF

TX

ANT

SPDT

L1

27 nH

C3

100 pF

C5

100 pF

R1

See Note 8

+5V

Cbypass

12 pF

+5V

+28V

Ground

Logic

Input

MADR-008888-000100

Switch Driver