RFT3100

The RFT3100 is a kind of baseband-to-radio frequency (RF) transmit processor. It performs all transmit (Tx) signal processing functions required between the analog baseband and the power amplifier (PA) for IS-95 code division multiple access (CDMA) cellular, JSTD-018 PCS, and ARIB-53 (Japan) single-band and dual-band applications.

The device RFT3100 incorporates the previous-generation functionality of the IF3000 baseband-to-intermediate frequency (IF) processor together with RF upconversion and driver amplifiers. The device is available in three configurations: dual-band cellular and PCS (RFT3100-1), cellular-only (RFT3100-2) and PCS-only (RFT3100-3). The device includes an IF micer for upconverting analog baseband to IF, a programmable phase locked loop (PLL) for generating Tx IF frequency, single-sideband upconversion from IF to RF, two celluar and two PCS driver amplifiers (dual-band version), and Tx power control through an 85 dB variable gain amplifier (VGA).

There are some RFT3100 features as follows: (1)full upconversion from analog baseband to RF; (2)integrated I/Q modulator, IF VCO/PLL, SSB upconverter, VGA and driver amplifiers; (3)designed for dual-mode cellular (CDMA/AMPS), single-band PCS, or dual-band PCS (PCS CDMA/AMPS) applications; (4)eliminates image-reject filter between upconverter and driver amplifier; (5)includes two cellular and two PCS driver amplifier outputs (dual-band version); (6)MSM-controlled operation via serial bus interface (SBI); (7)Tx power control through 85 dB dynamic range VGA; (8)puncture mode (gated Tx power) for extended talk-time performance; (9)simplified RF PCB design and shorter development cycle time; (10)supply voltage from 2.7 to 3.3 V; (11)BCC++ 32-pad plastic chip scale package.