SKY65050-372LF

Overview

The SKY65050-372LF is a high-performance, n-channel depletion mode pHEMT low-noise transistor designed for wideband RF applications from 450 MHz to 6.0 GHz. It provides a typical gain of 15.5 dB and an OIP3 of +23.5 dBm at 2.4 GHz with a supply current of 20 mA. The device features an adjustable supply current ranging from 5 mA to 55 mA via self-biasing resistors. Packaged in a compact 4-pin SC-70 format (2.20 x 1.35 x 1.10 mm), it requires external matching networks for optimal performance.

Feature Summary

• Depletion mode pHEMT technology enables ultra-low noise figure and high linearity across a broad frequency range.
• Adjustable drain current allows designers to optimize the trade-off between power consumption and noise performance.
• Self-biasing capability simplifies circuit design by eliminating the need for negative DC voltage supplies.

Applications

• Wireless infrastructure including WLAN, WiMAX, broadband, and cellular base stations
• Low noise amplifier stages for GPS receivers
• Satellite receiver front ends
• RF test instrumentation

Procurement Notes

Verify component authenticity through authorized Skyworks distributors or direct channels. Confirm the specific ordering suffix matches the required package orientation. Ensure storage conditions adhere to moisture sensitivity level guidelines prior to solder assembly to prevent internal damage during reflow processes.

Selection Notes

Select this component when a discrete, externally matched solution is preferred over integrated LNAs. Evaluate the impact of external matching network losses on the total system noise figure. Verify that the available board space accommodates the required passive components alongside the small SC-70 footprint.

Part Context

This device belongs to Skyworks' portfolio of discrete RF transistors, offering flexibility for custom impedance matching compared to pre-matched integrated circuits. It utilizes advanced pHEMT fabrication processes to achieve superior linearity and noise characteristics suitable for demanding wireless communication environments.

Replacement Considerations

No officially confirmed substitute part numbers are documented in the provided datasheet. Designers must evaluate alternative discrete pHEMT transistors based on equivalent pinout configurations, operating frequency ranges, and electrical specifications such as noise figure and gain.

FAQ

How is the drain current adjusted on the SKY65050-372LF?

The drain current is adjusted by placing a resistor between one of the source leads and ground. Table 2 in the datasheet lists specific resistor values corresponding to target currents ranging from 5 mA to 55 mA.

What is the maximum supply voltage allowed for this device?

According to the absolute maximum ratings, the maximum drain-to-source voltage (VDS) is 6.0 V. The recommended operating condition specifies a typical supply voltage of 3 V.

Does the device require a negative gate voltage for operation?

No negative supply is strictly required if self-biasing is used. By connecting a resistor from the source to ground, the resulting voltage drop creates the necessary negative VGS relative to the unbiased gate pin.