Tx BASEBAND/RF PROCESSOR
RFT3100
T E C H N O L O G I E S
VDDA
VDDD
VDDM
VDDRF
CELLA_OUT
TM
Enabling the future of communications.
TM
Figure 1. RFT3100 Processor Functional Block Diagram
VCONTROL
TX_I
TX_IN
危
SSB
TX_Q
TX_QN
CELLB_OUT
0
1/2
90
bandpass filter normally
required between the
upconverter and driver
amplifier, providing overall
board area and cost savings.
RFT3100 functionality is
specifically controlled from the
MSM device via the three-line
serial bus interface (SBI).
Designed to meet the
requirements for global CDMA
markets, the RFT3100 device
will operate over the following
Tx frequency ranges:
Cellular band
824 MHz - 925 MHz
PCS band
1750 MHz - 1910 MHz
Q U A L C O M M
TM
C D M A
PCSA_OUT
RFT3100
DAC_IREF
PCSB_OUT
SBI &
CONTROL
PLL
SBCK
SBDT
SBST
AB_SEL
PA_ON
IF_BPF1
IF_BPF2
RF_LO
RFT3100 OVERVIEW
The RFT3100鈩?Baseband-to-
Radio Frequency (RF) Transmit
Processor 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 RFT3100
device incorporates the
previous-generation functionality
of the IFT3000鈩?Baseband-to-
Intermediate Frequency (IF)
Processor together with RF
upconversion and driver
amplifiers. In addition to
offering the most advanced and
integrated CDMA Tx solution
available, providing a board
area savings of more than 65
percent over previous
generation chipsets, the
RFT3100 device minimizes
power consumption for
extended talk-time performance.
The RFT3100 device is
available in three
configurations: dual-band
cellular and PCS (RFT3100-1),
cellular-only (RFT3100-2), and
PCS-only (RFT3100-3).
Utilizing an analog baseband
interface, the RFT3100 device
connects directly to
QUALCOMM鈥檚 MSM3100鈩?/div>
The range of supply voltage
for the RFT3100 device is from
and MSM3300鈩?chipsets. The 2.7 V to 3.3 V, which provides
operating compatibility for
baseband quadrature signals
platforms utilizing a single-cell
are upconverted to the cellular
Li-Ion battery design. RFT3100
or PCS frequency bands and
amplified to provide signal drive operating modes are controlled
by the MSM and include
capability to the PA. The
selective power-down, gain
RFT3100 device includes an IF
control, and punctured CDMA
mixer for upconverting analog
transmission (gated Tx power)
baseband to IF, a
for optimal power savings and
programmable Phase Locked
talk-time improvement.
Loop (PLL) for generating Tx IF
frequency, single-sideband
The RFT3100 device is
upconversion from IF to RF, two
fabricated on an advanced
cellular and two PCS driver
BiCMOS process, which
amplifiers (dual-band version),
accommodates both precision
and Tx power control through
high-frequency analog circuits
an 85 dB variable gain
and low-power CMOS functions,
amplifier (VGA). The single-
and is available in a 32-pad
sideband upconversion also
BCC++ plastic package.
eliminates the need for a
QUALCOMM INCORPORATED CDMA TECHNOLOGIES 5775 MOREHOUSE DR. SAN DIEGO, CA 92121-1714 http://www.cdmatech.com <cdma-technologies@qualcomm.com> T (858)658-5005 F (858)658-1556
PD_OUT
PD_ISET
TCXO
LOCK_DET
TXVCO_T1
TXVCO_T2
1
2
