XX1001-QK(2006) Просмотр технического описания (PDF) - Mimix Broadband
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XX1001-QK Datasheet PDF : 5 Pages
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18.0-21.0/36.0-42.0 GHz Doubler and
Power Amplifier, QFN, 7x7mm
October 2006 - Rev 04-Oct-06
Recommended Layout
X1001-QK
App Note [1] Biasing - It is recommended to separately bias each amplifier stage Vd1 through Vd6 at Vd1=2.5V, Vd2=3.0V, Vd(3,4,5,6)=4.5V with
Id1<1mA, Id2=20mA, Id3=40mA, Id4=70mA, Id5=150mA, Id6=270mA. Separate biasing is recommended if the amplifier is to be used at high levels
of saturation, where gate rectification will alter the effective gate control voltage. As shown in the bonding diagram, it is possible to parallel stages
Vd(3,4,5) with Id(3,4,5)=260mA while maintaining satisfactory performance. For non-critical applications it is possible to parallel stages Vd(3,4,5,6)
together and adjust the common gate voltage Vg(3,4,5,6) for total drain current Id(total)=530mA. 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 -0.7V. 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
MTTF is calculated from accelerated life-time data of single devices and assumes an isothermal back-plate.
1.0E+05
XX1001-QK, MTTF (yrs) vs. Backplate Temperature (°C)
1.0E+04
1.0E+03
1.0E+02
1.0E+01
1.0E+00
55
65
75
85
95
Temperature (°C)
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 4 of 5
Characteristic Data and Specifications are subject to change without notice. ©2006 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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