XP1080-QU_11 Datasheet, PDF (5/6 Pages) Mimix Broadband – 37.0-40.0 GHz GaAs Power Amplifier

37.0-40.0 GHz GaAs Power Amplifier
QFN, 7x7mm
January 2011 - Rev 10-Jan-11
P1080-QU
App Note [1] Biasing - It is recommended to bias the amplifier with Vd=4.0V and Id=1000mA. 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 pin (Vd1,2,3 and Vg1,2,3) needs to have DC bypass capacitance (10 nF/1 uF) as close to the package as possible.
App Note [3] Power Detector - As shown in the schematic below, the power detector is implemented by providing +5V bias and measuring
the difference in output voltage with standard op-amp in a differential mode configuration.
MTTF
XP1080-QK-0N00: MTTF hours vs Package Base Temperature
Vd=4V, Id=1000mA
1.0E+14
1.0E+13
1.0E+12
1.0E+11
1.0E+10
1.0E+09
1.0E+08
1.0E+07
1.0E+06
1.0E+05
1.0E+04
1.0E+03
20 30 40 50 60 70 80 90 100 110 120 130
Package Base Temp (ºC)
XP1080-QK-0N00: Tch(max) vs Package Base Temperature
XP1080-QK-0N00: Operating Power De-rating Curve
Vd=4V, Id=1000mA
(continuous)
200
8
175
7
6
150
5
125
4
3
100
2
75
1
50
0
20 30 40 50 60 70 80 90 100 110 120 130
25
Package Base Temp (ºC)
50
75
100
125
150
175
Package Base Temp (ºC)
Typical Application
IF IN
TX
DRIVER
PA + DET
X2
XU1019-QH
TX Filter
(if required)
XB1014-QT
DET
XP1080-QU
DIPLEXER
LO
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: [phone] Fax: [phone] mimixbroadband.com
Page 5 of 6
Characteristic Data and Specifications are subject to change without notice. ©2011 Mimix Broadband, Inc.
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