XB1014-QT_15 Datasheet, PDF (5/6 Pages) M/A-COM Technology Solutions, Inc. – Buffer Amplifier

XB1014-QT
Buffer Amplifier
37.0 - 40.0 GHz
Rev. V2
App Note [1] Biasing - It is recommended to bias the amplifier with Vd=4.0 V and IdTOTAL=250 mA. 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 -0.3 V. 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 pin (Vd and Vg) needs to have DC bypass capacitance
(100pF/10nF/1uF) as close to the package as possible.
Typical Application
XP1080-QK XB1014-QT
RF OUT
37.0-39.5 GHz
XU1019-QH
X Mixer
Buffer
X2
Coupler
IF In
2 GHz
LO
MMIC-based 37.0-40.0 GHz Transmit t er Block Diagram
5
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: [phone] • Europe Tel: [phone]
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
• India Tel: [phone]
• China Tel: [phone]
Visit www.macomtech.com for additional data sheets and product information.
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. _{M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make}
Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.