XU1005-QD Просмотр технического описания (PDF) - Mimix Broadband
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XU1005-QD Datasheet PDF : 6 Pages
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10.0-18.0 GHz GaAs Transmitter
QFN, 7x7mm
August 2007 - Rev 19-Aug-07
U1005-QD
App Note [1] Biasing - This device is operated by separately biasing Vd(1,2)=5.0V, Vss=-5.0V, Id1=140mA, Id2=210mA
and Is1=140mA. Additionally, a mixer is also required with Vg1=-0.6V. Adjusting Vg1 above or below this value can
adversely affect conversion gain, LO/RF isolation and intercept point performance. Gain control can be adjusted by
varying Vg2 from 0.0 to -1.2 V with 0.0V providing minimum attenuation and -1.2 V providing maximum attenuation. 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 -0.2V. 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.
MTTF Tables (TBD)
These numbers were calculated based on accelerated life test information and thermal model analysis received from the fabricating foundry.
Backplate
Temperature
Channel
Temperature
Rth
MTTF Hours
FITs
55 deg Celsius
deg Celsius
C/W
E+
E+
75 deg Celsius
deg Celsius
C/W
E+
E+
95 deg Celsius
deg Celsius
C/W
E+
E+
Bias Conditions: Vd1=Vd2=5.0V, Vss=-5.0V, Id1=140mA, Id2=210mA, Id3=140mA, Is1=140mA
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 5 of 6
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.
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