Datasheet HMC980 (Analog Devices) - 9

HMC980
v00.0312
Active BiAs controller High current Pad Descriptions
pad number Function Description interface schematic ip 1,12,13,20,21, these pads and the die bottom must be connected to a h GnD 35 high quality rF/DC ground. over/under current alarm. provides an active high signal 2 alM (VDiG) if the quiescent bias exceed the upper threshold s - C or drops below the lower threshold. r trigger out signal. Generates a hiGh (3.3V) signal when the active bias system stabilizes. this signal can be lle 19 triGoUt used to trigger next device (enaBle) if more than one o hMC980 is used in a daisy chain. r t Dummy alarm trigger signal to create test alarm when n 3 alMtrG taken hiGh (3.3V). Defaults to loW (GnD) when left floating. o s C enable pad. Bias control loop is enabled when Ven 4 en is hiGh(VDiG). if left floating, Ven defaults to hiGh ia (enabled). B Control pads for internal switch resistance. if left float- ing, default to hiGh. 5,6 s1,s0 refer to table-1 in application notes for recommended settings. Bias supply pad. Connect supply voltage to this pad 7,8,9,10,11 VDD with appropriate filtering. a high precision (e.g. 0.5%, ±25 ppm tCr) 10K resistor 14 FiXBias to ground is recommended for good bias accuracy. 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
7
Application Support: Phone: 978-250-3343 or [email protected] Document Outline Typical Applications Features Functional Diagram General Description Electrical Specifications Typical Performance Characteristics Bias Current Accuracy[1] Bias Current Accuracy[2] Power Up Waveform Shutdown Waveform Enable Waveform Disable Waveform Load Regulation @ VDD=5V, VDIG=3.3V, SW0=GND, SW1=GND Load Regulation @ VDD=5V, VDIG=3.3V, SW0=3.3V, SW1=GND Load Regulation @ VDD=16.5V, VDIG=5.0V, SW0=GND, SW1=VDIG Load Regulation @ VDD=16.5V, VDIG=5.0V, SW0=VDIG, SW1=VDIG VNEG Load Regulation @ VDD=5V VNEG Load Regulation @ VDD=16.5V VNEG Load Transient VDD=5V VNEG Load Transient VDD=16.5V VGATE Load Regulation @ VDD=12V [1] VG2 Load Regulation @ VDD=12V [2] VNEG Line Regulation vs. Supply Voltage Absolute Maximum Ratings Outline Drawing Pad Descriptions Application Notes Detailed Description Digital Power Supply (VDIG) Supply and Drain Voltage (VDD and VDRAIN) Table 1. REcommended Current Range Configuration Negative Voltage Generator (VNEGOUT) Enable/Disable (EN) Active Bias Control Loop VG2 Voltage Adjustment Self Protection Feature VNEG Fault Detection Feature Daisy-Chain Operation Operation Modes Table 2 - The List of Bias Settings for Various Hittite Amplifiers Table 3 - List of Bias Settings for Various Hittite Amplifiers