HD155111F

HD155111F RF Single-chip Linear IC for PCN Cellular Systems ADE-207-257 (Z) 1st Edition August 1998 Description The HD155111F was developed for PCN (DCS1800) cellular systems, and integrates most of the functions of a transceiver. The HD155111F incorporates the bias circuit for a RF LNA, a 1st mixer, 1st-IF amplifier, 2nd mixer, AGC amplifier and an IQ quadrature demodulator for the receiver, and an IQ quadrature modulator and offset PLL for the transmitter. Also, on chip are the dividers for the 1st & 2nd local oscillator signals and 90˚ phase splitter. Moreover the HD155111F includes control circuits to implement power saving modes. These functions can operate down to 2.7 V and are housed in a 48-pin LQFP SMD package. Hence the HD155111F can form a small size transceiver handset for PCN by adding a PLL frequency synthesizer IC, a power amplifier and some external components. See page 7 “Configuration”. The HD155111F is fabricated using a 0.6 µm double-polysilicon Bi-CMOS process. Functions Receiver (RX) Low Noise Amplifier (LNA) bias circuit 1st mixer IF amplifier 2nd mixer Automatic gain control amplifier (AGC) IQ demodulator with 90° phase splitter Transmitter (TX) IQ modulator with 90° phase splitter Offset PLL  Down converter  Phase comparator  TX VCO driver HD155111F Others IF dividers Power saving circuit IFVCO Features Highly integrated RF processing for hand-portables Wide operating frequency RX:  RF: 1805 to 1880 MHz  1st IF: 130...