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HMC980 Datasheet(PDF) 8 Page - Hittite Microwave Corporation |
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HMC980 Datasheet(HTML) 8 Page - Hittite Microwave Corporation |
8 / 20 page For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com Application Support: Phone: 978-250-3343 or apps@hittite.com 8 HMC980 v00.0312 Active BiAs controller High current Pad Descriptions (Continued) pad number Function Description interface schematic 15 alMh a high precision resistor (e.g. 0.5%, ±25 ppm tCr) to iset pad is recommended for good bias accuracy. the value of the resistor sets the threshold. if alarm feature is not used alMh can be shorted to iset. 16 iset a high precision resistor (e.g. 0.5%, ±25 ppm tCr) between alMl and iset is recommended for good bias accuracy. the total external resistance from iset pad to GnD should always be equal to 5 k Ω. 17 alMl a high precision resistor (e.g. 0.5%, ±25 ppm tCr) to GnD is recommended for good bias accuracy. the value of the resistor sets the threshold value for under current alarm. if alarm feature is not used alMl can be shorted to iset. 18 isense Drain current adjustment pad. to adjust the bias current of the external amplifier connect a resistor (rsense) from isense pad to GnD according to eqn(2) on page 13-15. a high precision resistor (e.g. 0.5%, ±25 ppm tCr) is recommended for good bias accuracy. |
Similar Part No. - HMC980_12 |
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Similar Description - HMC980_12 |
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