CX77304-17 Datasheet | Skyworks Solutions

DATA SHEET CX77304-17 PA Module for Tri-band EGSM DCS PCS / GPRS Applications - Tri-band cellular handsets enpassing - Class 4 EGSM900 - Class 1 DCS1800 - PCS1900, and - Up to Class 10 GPRS multi-slot operation Description The CX77304-17 Power Amplifier Module (PAM) is designed in a pact form factor for tri-band cellular handsets prising EGSM900, DCS1800, and PCS1900 operation. It also supports Class 10 General Packet Radio Service (GPRS) multi-slot operation. Features - High efficiency - EGSM 55% - DCS 50% - PCS 45% - Input/output matching - 50 Ω internal - Small outline - 9.1 mm × 11.6 mm - Low profile - 1.5 mm - Low APC current - 10 µA typical - Gold plated, lead-free contacts The PAM consists of an EGSM900 PA block, a DCS1800/PCS1900 PA block, impedancematching circuitry for 50 Ω input and output, and bias control circuitry. Two separate Heterojunction Bipolar Transistor (HBT) PA blocks are fabricated on a single Gallium Arsenide (Ga As) die. One PA block operates in the EGSM900 band and the other PA block supports both the DCS1800 and the PCS1900 bands. Optimized for lithium ion battery operation, both PA blocks share mon power supply pins to distribute current. A custom CMOS integrated circuit provides the internal interface circuitry, including a current amplifier that minimizes the required power control current (IAPC) to 10 µA, typical. The Ga As die, the Silicon (Si) die, and passive ponents are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold. The RF input and output ports are internally matched to 50 Ω to reduce the number of external ponents for a tri-band design. Extremely low leakage current (2 µA, typical) of the dual PA module maximizes handset standby time. The CX77304-17 also contains band-select switching circuitry to select EGSM (logic 0) and DCS/PCS (logic 1) as determined from the Band Select (BS) signal. In the block diagram shown below, the BS pin selects the PA output...