HMC311ST89 / 311ST89E v04.0517 InGaP HBT GAIN BLOCKMMIC AMPLIFIER, DC - 6 GHzPin Descriptions Pin Number Function Description Interface Schematic T M This pin is DC coupled. 1 RFIN An off chip DC blocking capacitor is required. K - S C 3 RFOUT RF output and DC Bias for the output stage. LO IN B These pins and package bottom must be connected to RF/ 2, 4 GND A DC ground. R & G E IV Application Circuit R R - D IE ILF P M A Note: 1. Select Rbias to achieve Icq using equation below, Rbias > 22 Ohm. 2. External blocking capacitors are required on RFIN and RFOUT. Icq = Vs - 3.8 Rbias Recommended Component Values Frequency (MHz) Component 50 900 1900 2200 2400 3500 5200 5800 L1 270 nH 56 nH 18 nH 18 nH 15 nH 8.2 nH 3.3 nH 3.3 nH C1, C2 0.01 µF 100 pF 100 pF 100 pF 100 pF 100 pF 100 pF 100 pF For price, delivery, and to place orders: Analog Devices, Inc., One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 Phone: 781-329-4700 • Order online at www.analog.com 5 Application Support: Phone: 1-800-ANALOG-D