Page 5 of 8

18.0-25.0 GHz GaAs MMIC

Transmitter

MTTFTables (TBD)

Backplate

Temperature

55 deg Celsius

75 deg Celsius

95 deg Celsius

Channel

Temperature

deg Celsius

deg Celsius

deg Celsius

FITs

E+

E+

E+

MTTF Hours

E+

E+

E+

Rth

C/W

C/W

C/W

Bias Conditions: Vd1=3.5V, Vd2=4.0V, Id1=230 mA, Id2=116 mA

These numbers were calculated based on accelerated life test information and thermal model analysis received from the fabricating foundry.

App Note [1] Biasing - As shown in the bonding diagram, this device is operated by separately biasing Vd1 and Vd2 with Vd1=3.5V,

Id1=230mA and Vd2=4.0V, Id2=116mA. It is also recommended to use active biasing to keep the currents constant as the RF power and

temperature vary; this gives the most reproducible results. Depending on the supply voltage available and the power dissipation constraints,

the bias circuit may be a single transistor or a low power operational amplifier, with a low value resistor in series with the drain supply used

to sense the current. The gate of the pHEMT is controlled to maintain correct drain current and thus drain voltage. The typical gate voltage

needed to do this is -0.3V. Typically the gate is protected with Silicon diodes to limit the applied voltage. Also, make sure to sequence the

applied voltage to ensure negative gate bias is available before applying the positive drain supply.

App Note [2] Bias Arrangement - Each DC pad (Vd1,2 and Vg1,2) needs to have DC bypass capacitance (~100-200 pF) as close to the

device as possible. Additional DC bypass capacitance (~0.01 uF) is also recommended.

Typical Application

Mimix Broadband MMIC-based 18.0-25.0 GHz Transmitter Block Diagram

(Changing LO and IF frequencies as required allows design to operate as high as 25.0 GHz)

IF IN

17.7-19.7 GHz

XB1004-BD

XP1013-BD

XU1002-BD

Sideband

Reject

RF Out

17.7-19.7 GHz

LO(+2.0dBm)

7.85-8.85 GHz (USB Operation)

9.85-10.85 GHz (LSB Operation)

Mimix Broadband's 18.0-25.0 GHz XU1002-BD GaAs MMIC Transmitter can be used in saturated radio applications and linear modulation

schemes up to 16 QAM. The transmitter can be used in upper and lower sideband applications from 18.0-25.0 GHz.

Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099

Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com

Characteristic Data and Specifications are subject to change without notice.

©2007 Mimix Broadband, Inc.

Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept

their obligation to be compliant with U.S. Export Laws.

August 2007 - Rev 20-Aug-07

U1002-BD