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U1010-QH Datasheet(PDF) 3 Page - Mimix Broadband |
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U1010-QH Datasheet(HTML) 3 Page - Mimix Broadband |
3 / 5 page Page 3 of 5 Recommended Board Layout U1010-QH App Note [1] Biasing - As shown in the Pin Designations table, the device is operated by biasing VD1 and VD2 at 4.0V with 130mA and approximately 60mA respectively. VG2,3 and VSS require fixed voltage biasing with VSS biased at -4.0V and 45mA. It is recommended to use active bias on VG1 to keep the current in VD1 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 -0.2V. 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. 17.0-34.0 GHz Up-Converter QFN, 4x4mm Mimix Broadband, Inc., 10795 Rockley Rd., Houston,Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. ©2010 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. February 2010 - Rev 12-Feb-10 |
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