Datasheet HMC981 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | ACTIVE BIAS CONTROLLER |
| Pages / Page | 18 / 7 — HMC981. ACTIVE BIAS CONTROLLER. Pad Descriptions |
| File Format / Size | PDF / 886 Kb |
| Document Language | English |
HMC981. ACTIVE BIAS CONTROLLER. Pad Descriptions
Model Line for this Datasheet
Text Version of Document
HMC981
v00.0611
ACTIVE BIAS CONTROLLER Pad Descriptions
Pad Number Function Description Interface Schematic IP 1, 5, 8, 10, H 13, 15, 20, These pads and the die bottom must be connected to a GND 23, 25, 26, high quality RF/DC ground. Die Bottom Enable pad. System is enabled when Ven is HIGH (VDIG). 2 EN S - C If left floating, Ven defaults to HIGH (enabled). R Internal switch resistance control pad. If left floating, VSW 3 SW defaults to HIGH. LLE Disables short circuit lock down when pulled to ground. 12 DISBLSC O Leave it floating to enable short circuit lock down. R T Control voltage of the VG2. Use a resistor divider between N 4 VG2CONT VDD and GND to set the voltage. VG2 is typically 1.3V O lower than the VG2CONT S C IA 19 VG2 Second gate control. B Bias supply pan. Connect supply voltage 6-7, 29-30 VDD, VDIG to this pad with appropriate filtering. 1.5V reference voltage. 0.1uF or greater capacitor to GND 9 VREF is needed for noise filtering. To adjust the bias current of the external amplifier connect a resistor (Rsense) from ISENSE pad to GND. Use Eqn.2 11 ISENSE to determine the required Rsense value. Inf F or o m r p atio r n ifc ur e n , d ishe e d lbiv y e A r n y a alog n D d t evic o p es is la beclie o eved rd to ebre sa: H ccur iattti e tae M nd re ilicarbloew . H a o ve C wever, o n rp o 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 oration, 2 Elizabeth Drive, Chelmsford, MA 01824 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 978-250-3343 Fax: 978-250-3373 O rights of third parties that may result from its use. Specifications subject to change without notice. No P rd ho e ne r O : 7 n 81- -3li 2n 9 e a -47 t w 0 w 0 • O w rd .h e it r o tniltie n .c e ao t m
7
license is granted by implication or otherwise under any patent or patent rights of Analog Devices. www.analog.com Application Support: Pho Trademarks and registered trademarks are the property of their respective owners. ne: 978-250-33 A 4 p 3 o plica r a tio p n S p u s p @ po h rt itt : P ite ho . n c e o : 1m -800-ANALOG-D
v00.0611
ACTIVE BIAS CONTROLLER Pad Descriptions
Pad Number Function Description Interface Schematic IP 1, 5, 8, 10, H 13, 15, 20, These pads and the die bottom must be connected to a GND 23, 25, 26, high quality RF/DC ground. Die Bottom Enable pad. System is enabled when Ven is HIGH (VDIG). 2 EN S - C If left floating, Ven defaults to HIGH (enabled). R Internal switch resistance control pad. If left floating, VSW 3 SW defaults to HIGH. LLE Disables short circuit lock down when pulled to ground. 12 DISBLSC O Leave it floating to enable short circuit lock down. R T Control voltage of the VG2. Use a resistor divider between N 4 VG2CONT VDD and GND to set the voltage. VG2 is typically 1.3V O lower than the VG2CONT S C IA 19 VG2 Second gate control. B Bias supply pan. Connect supply voltage 6-7, 29-30 VDD, VDIG to this pad with appropriate filtering. 1.5V reference voltage. 0.1uF or greater capacitor to GND 9 VREF is needed for noise filtering. To adjust the bias current of the external amplifier connect a resistor (Rsense) from ISENSE pad to GND. Use Eqn.2 11 ISENSE to determine the required Rsense value. Inf F or o m r p atio r n ifc ur e n , d ishe e d lbiv y e A r n y a alog n D d t evic o p es is la beclie o eved rd to ebre sa: H ccur iattti e tae M nd re ilicarbloew . H a o ve C wever, o n rp o 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 oration, 2 Elizabeth Drive, Chelmsford, MA 01824 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 978-250-3343 Fax: 978-250-3373 O rights of third parties that may result from its use. Specifications subject to change without notice. No P rd ho e ne r O : 7 n 81- -3li 2n 9 e a -47 t w 0 w 0 • O w rd .h e it r o tniltie n .c e ao t m
7
license is granted by implication or otherwise under any patent or patent rights of Analog Devices. www.analog.com Application Support: Pho Trademarks and registered trademarks are the property of their respective owners. ne: 978-250-33 A 4 p 3 o plica r a tio p n S p u s p @ po h rt itt : P ite ho . n c e o : 1m -800-ANALOG-D
