1GC1-4251 DC–12 GHz HBT Series–Shunt Amplifier

Keysight Technologies

DC–12 GHz HBT Series–Shunt Amplifier

1GC1-4251

Data Sheet

Description

The 1GC1-4251 is a packaged DC to 12 GHz, 9.5 dB gain, feedback amplifier designed to be used as a cascadable gain block for a variety of applications. The device consists of a modified Darlington feedback pair which reduces the sensitivity to process variations and provides 50 ohm input/output port matches. Furthermore, this amplifier is fabricated using HFTC’s Hetero-junction Bipolar Transistor (HBT) process which provides excellent process uniformity, reliability and 1/f noise performance. The device requires a single positive supply voltage and generally operates Class–A for good distortion performance. 

Applications

The 1GC1-4251 is a general purpose gain block that can be used for a variety of applications requiring moderate amounts of gain and low power dissipation in a 50 ohm system.

Biasing and operation

The 1GC1-4251 can be operated from a single positive supply. This supply must be connected to two leads on the package, namely Vcc (lead 4) and the output (lead 6). The supply voltage may be directly connected to the Vcc lead as long as the voltage is between +4.75 to +7 volts; however, if the supply is higher than +7 volts, a series resistor (Rcc) should be used to reduce the voltage to the Vcc lead. See the bonding diagram for the equation used to select Rcc. In the case of the output lead, the supply voltage must be connected to the output transmission line through a resistor and an inductor. 

Assembly techniques

This package is compatible with wave–solder or reflow printed circuit board soldering processes.

GaAs MMICs in either chip or SMT packages are ESD sensitive. ESD preventive measures must be employed in all aspects of storage, handling, and assembly. MMIC ESD precautions, handling considerations, die attach and bonding methods are critical factors in successful GaAs MMIC performance and reliability.

The 1GC1-4251 die is fabricated using a GaAs-based HBT semiconductor material structure which is compatible with newer RoHS assembly temperatures and allows the device to be attached to a hybrid microcircuit housing or to thermally conductive embedded heatsinks which exist in QFN SMT packages.

Moisture compatibility

Injection mold components like the 1GC1-4251 in QFN are moisture-sensitive. The product is tested to the moisture and reflow sensitivity level 3 as per IPC/Jedec J-STD-020 and must be mounted within 24 hours of opening the shipping container. Store and handle parts for reflow and for rework per IPC/Jedec J-STD-033B.

Tape and reel

The 1GC1-4251 is available in tape and reel format to facilitate automatic pick and place manufacturing.

RoHS compliance

The 1GC1-4251 amplifier is RoHS compliant. This means the component meets the requirements of the European Parliament and the Council of the European Union “Restriction of Hazardous Substances” Directive 2002/95/EC, commonly known as “RoHS”. The six regulated substances are lead, mercury, cadmium, chromium VI (hexavalent), polybrominated biphenyls (PBB) and polybrominated biphenyl ethers (PBDE). RoHS compliance implies that any residual concentration of these substances is below the RoHS Directive’s maximum concentration values (MVC); being less than 1000 ppm by weight for all substances except for cadmium which is less than 100 ppm by weight.