[Conexant]

The RF142 Power Amplifier (PA) controller is a highly integrated, monolithic device optimized for use in 900 MHz, 1800 MHz, and 1900 MHz Global System For Mobile communications® (GSM®) and other Time Division Multiple Access (TDMA) applications. The control current output from the RF142 can be used to control the transmit power of a dual or multi-band Heterojunction Bipolar Transistor (HBT) PA.

Features

• RF PA controller for use with HBT PAs

• 50 dB detector dynamic range

• Broadband, logarithmic power detector (800 MHz to 2000 MHz)

• Logarithmic RF power detector requires no external diodes

• Integrator and gain shaping block enhance loop stability and linearity

• Three-cell battery operation (2.7 V to 5.0 V)

• Standby mode with 20 µA of current consumption

• 20-pin Thin Shrink Small Outline Package (TSSOP)

Applications

• Transmit power control for dual or multi-band GSM digital cellular handsets