XR1019-QH Datasheet, PDF (6/7 Pages) Mimix Broadband – 27.0-34.0 GHz GaAs Receiver QFN, 4x4mm

27.5-33.4 GHz GaAs Receiver
QFN, 4x4mm
March 2011 - Rev 22-Mar-11
R1019-QH
App Note [1] Biasing - As shown in the Pin Designations table, the device is operated by biasing VD1,2,3 at 3.0V with 7.5, 30, 90mA respectively.
Additionally, a fixed voltage bias of -3V is required for mixer bias. It is recommended to use active bias to keep the currents constant in order to
maintain the best performance over temperature. 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 -0.35V.
Make sure to sequence the applied voltage to ensure negative gate bias is available before applying the positive drain supply.
App Note [2] Board Layout - As shown in the board layout, it is recommended to provide 100pF decoupling caps as close to the bias pins as
possible, with additional 10µF decoupling caps.
Recommended Board Layout
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Tel: [phone] Fax: [phone] mimixbroadband.com
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Characteristic Data and Specifications are subject to change without notice. ©2011 Mimix Broadband, Inc.
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