HMC920LP5E v07.1013 ACTIVE BIAS CONTROLLERPin Descriptions (Continued) Pin Number Function Description Interface Schematic 1.5V reference voltage. 0.1uF or greater capacitor to GND 13 VREF is needed for noise filtering. Bias supply for negative voltage generator. Connect supply 14 Vdd2 voltage with appropriate filtering. Vdd2 supply voltage should be same as Vdd1. 13 T Negative voltage generator charge pump output. Negative voltage generator needs a flying capacitor, a reservoir M 15 CPOUT capacitor and two diodes to operate. Please refer to the application schematic for more info. T - S N E 16 DGND Digital ground domain (DGND). M 11, 17 AGND Analog ground domain (GND). E G A N Feedback (Control) pin for Negative Voltage Genera- A tor Charge Pump. Float to activate the negative voltage 18 VNEGFB generator / Sort to GND to disable the negative voltage generator. R M E Negative input to the chip. Should be supplied with CPOUT W when negative voltage generator is enabled, or connect to O 19 VNEGIN external VSS when negative voltage generator is enabled. For detailed usage please refer to the “Negative Voltage Generator” section. C P D Control pin for VGATEFB. Float VGATEFB when a depletion mode transistor is biased. Selects the mode of 20 VGATEFB operation along with VNEGFB pin. For detailed usage please refer to the Table 1. Mode Selection. Information furnish F e o d r p by A rnic alo e g , d Devi ecleis vie s rby eli, a eve nd t d to b o p e a l cc a ur c at e o e an r d d releiars ble , p . Ho le we a ve sr, e c no For price, delivery, and to place orders: Analog Devices, Inc., responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other ontact Hittite Microwave Corporation: One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 20 Alpha Road, Chelmsford, MA 01824 Phone rights of third parties that may result from its use. Specifications subject to change without notice. No : 9P7 h 8 o - n 2 e 5 : 7 0- 81- 3 3 3 2 4 9- 3 F 470 ax: 9 0 • Ord 7 e 8 r o - n 2 li 5 n 0 e a-t 337 ww 3 license is granted by implication or otherwise under any patent or patent rights of Analog Devices. w.analog.com 13 - 8 Order On- Trademarks and registered trademarks are the property of their respective owners. line at www.hi A tptiptliec.actio o m n Support: Phone: 1-800-ANALOG-D
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