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Future
S
S
Communications
Integrated circuit Inc.
FC7785
Dual-band (Cellular/US-PCS) CDMA
1x/EVDO Rev.A Diversity Transceiver
D
ESCRIPTION
FC7785 is a dual-band (Cellular/US-PCS) CDMA
receiver diversity RF-to-baseband transceiver of
FCI’s zipRF™ family. It is a highly integrated chip
working with a single power supply. Because zeroIF architecture is used for FC7785, additional
components such as bulky IF SAW filters and other
IF matching components are no longer required.
FC7785 is featured to operate in the high data rate
EVDO. Three-wired serial-to-parallel interface (SPI)
protocol enables FC7785 to operate in the various
modes. FC7785 contains complete dual-band
receiver’s main and diversity path such as LNA,
down-conversion mixer, channel selection filter
(CSF), Rx VCO, Rx PLL, and LO distribution block.
FC7785 also contains complete dual-band
transmitter path such as baseband amplifier, upconverter, RF variable-gain block, drive amplifier, Tx
VCO, Tx PLL, and LO distribution block. FC7785 is
optimized to have high SNR in 1x and EVDO Rev.A
receive and transmit mode. FC7785 is available in 8
x 8 x 0.9 mm MLF package.
A
PPLICATIONS
-
Dual-band CDMA 1x/EVDO Rev.A diversity
mobile phone or data card.
R
EVISION HISTORY
-
Tentative
-
Preliminary
version release: Apr, 26, 2011
version release: Aug, 09, 2011
F
EATURES
Single-chip dual-band (Cellular and US-PCS) receiver
diversity transceiver without need of external LNA
Low noise and highly linear LNA, mixer, and CSF for
cellular/US-PCS CDMA
Low noise, highly linear, wide dynamic range transmitter
with baseband amplifier, up-converter, drive amplifier
Automatic DC-offset calibration, filter calibration, VCO
calibration
Fully integrated low phase noise Rx, Tx, and Fractional-
N PLL with fine frequency resolution
Greater than 85-dB transmit power control
Support 3-wired SPI protocol
8 x 8 x 0.9 mm MLF package
B
LOCK DIAGRAM
RX1_CLNA_OUT
RX1_PLNA_OUT
RX_RBIAS
RX1_PLNA_BIAS
RX1_PLNA_IN
RX1_CLNA_IN
RX1_CLNA_BIAS
RX1_IP
RX1_IM
RX1_QP
RX1_QM
TX_RBIAS
TX_VC
TX_CDA_OUT
TX_PDA_OUT
RX
BIAS
CSF
CSF
TX
Control Part
RX1_CMIX_INP
RX1_CMIX_INM
RX1_PMIX_INM
RX1_PMIX_INP
RX_VCO_FTUNE
RX_LOIO
LOAD
TX VCO
& LO
RxVCO
& LO
RX PLL
RX2_PMIX_INP
LOAD
TX PLL
RX2_CMIX_INP
RX2_PMIX_INM
RX2_CMIX_INM
CSF
CSF
RX2_CLNA_OUT
TCXO BUFFER
CDMA
SPI
RX2_PLNA_OUT
RX2_PLNA_BIA
RX2_PLNA_IN
RX2_CLNA_IN
RX2_CLNA_BIA
RX2_IP
RX2_IM
RX2_QP
RX2_QM
TCXO
SPST
SPDT
SPCK
-
Preliminary
-
Preliminary
-
Preliminary
-
Preliminary
-
Preliminary
version release: Sep, 27, 2011
version release: Mar, 20, 2012
version release: Apr, 26, 2012
version release: May, 04, 2012
version release: Jan, 09, 2013
TX_IP
TX_IM
TX_QP
TX_QM
TX_LOIO
LOCK
TX_CP
TX_CP_HOLD
TX_ON
For latest specifications, technical questions and additional product information, visit website or e-mail
FCI Inc.
th
Floor, Kins Tower , 25-1 Website: http://www.fci.co.kr
11
Jeongja-Dong, Bundang-Gu, E-mail: [email protected]
Sungnam City, Gyunggi-do, Phone: 82-31-711-6444
463-811, KOREA Fax: 82-31-711-0313
FCI Confidential and Proprietary Information 1 / 20 Last updated at Jan/09/2012
The data can be changed without prior notice.
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