SKYWORKS SKY65342-11

The SKY65342-11 is a highly efficient Front-End Module (FEM) that incorporates a transmit/receive (T/R) path and an antenna T/R switch. The transmit path consists of a high efficiency power amplifier (PA) followed by a harmonic filter to reject harmonic frequencies. The PA is implemented using highly reliable Heterojunction Bipolar Transistor (HBT) process and is Class AB biased to provide maximum efficiency with a low spurious output. A high linearity and high isolation single-pole, double-throw (SPDT) switch is used at the common antenna interface between the transmit and receive paths. The receive path is a low insertion loss “through” path with input and output ports internally matched to 50 Ω. The SKY65342-11 FEM uses Surface Mount Technology (SMT) in the form of a Multi-Chip Module (MCM), which allows for a highly manufacturable, low-cost solution. The device is provided as a compact, 12-pin 8 x 8 mm MCM.

The SKY65342-11 provides input and output amplifier stages, and is internally matched for optimum efficiency. An active bias circuit provides the input and output stages with excellent gain tracking over temperature and voltage variations. The module operates with positive DC voltages, and maintains high efficiency and good linearity. The nominal operating voltage is 3.6 V for maximum power, but the device can be operated at slightly lower voltages for other mobile applications. The input and output stages are independently supplied using the VCC1 and VCC2 supply lines (pins 12 and 10, respectively). The bias reference voltages for stages 1 and 2 are supplied using common lines VREF1 and VREF2 (pins 5 and 6, respectively). The DC control voltage that sets the bias for stages 1 and 2 is supplied by the VC_BIAS signal, pin 4.

• Transmit output power >+29 dBm
• High gain in transmit path =32 dB
• High transmit/receive isolation >30 dB
• Internal RF match and bias circuits
• Single DC supply: +3.6 V
• Small, MCM (12-pin, 8x8 mm) package (MSL3, 260 ℃ per JEDEC J-STD-020)
• Offers lead (Pb)-free RoHS (Restriction of Hazardous Substances) compliant packaging

• Tetra radio
• Remote metering
• GSM450
• WLL