CX77144 Datasheet | Skyworks Solutions

DATA SHEET CX77144: Power ee Amplifier Module for CDMA (887- 925 MHz) t 4U . m o c t a - Wireless Local Loop (WLL) .D w w w Features - Low voltage positive bias - CDMA for Japan supply - 3.2 V to 4.2 V - Low VREF - 2.85 V, nominal - Good linearity - High efficiency - Large dynamic range - 10-pin package - 4 mm x 4 mm x 1.5 mm - Power down control - Low power- state control - In Ga P - CDMA2000 / IS95 Applications h S a Description The CX77144 Power Amplifier Module (PAM) is a fully matched, 10-pin surface mount module developed for cellular handset applications utilizing Code Division Multiple Access (CDMA) and Wireless Local Loop (WLL). This small and efficient power amplifier module packs a full 887- 925 MHz bandwidth coverage into a single pact package. The device meets the stringent IS95 requirements up 27.5 d Bm output power and up to 27 d Bm for CDMA2000. A low current digital pin (VCONT) provides improved efficiency for the low RF power range of operation. The single Gallium Arsenide (Ga As) Microwave Monolithic Integrated Circuit (MMIC) contains all active circuitry in the module. The MMIC contains on-board bias circuitry, as well as input and interstage matching circuits. The output match is realized off-chip and within the module package to optimize efficiency and power performance into a 50 Ω load. This device is manufactured with Skyworks’ Ga As Heterojunction Bipolar Transistor (HBT) process that provides for all positive voltage DC supply operation while maintaining high efficiency and good linearity. Primary bias to the CX77144 is supplied directly from a three-cell Ni-Cd, a single-cell Li-Ion, or other suitable battery with an output in the range of 3.2 to 4.2 volts. Power down is acplished by setting the voltage on the low current reference pin to zero volts. No external supply side switch is needed as typical “off” leakage is a few microamperes with full primary voltage supplied from the battery. w w w .D t a S a e h t e U 4 .c m...