Silicon Motion FC7785 - Manual

FC7785
Dual-band (Cellular/US-PCS) CDMA
1x/EVDO Rev.A Diversity Transceiver
FCI Confidential and Proprietary Information 1 / 20 Last updated at Jan/09/2012
The data can be changed without prior notice.
Future
Communications
Integrated circuit Inc.
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 zero-
IF 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, up-
converter, 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
H
ISTORY
- Tentative version release: Apr, 26, 2011
- Preliminary version release: Aug, 09, 2011
- Preliminary version release: Sep, 27, 2011
- Preliminary version release: Mar, 20, 2012
- Preliminary version release: Apr, 26, 2012
- Preliminary version release: May, 04, 2012
- Preliminary version release: Jan, 09, 2013
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
D
IAGRAM
TX_RBIAS
TX_VC
TX_CDA_OUT
SPDT
SPCK
RX
_V
C
O
_F
TUN
E
SPST
TX
_ Q
P
TX
_ Q
M
TX_
IP
TX_
IM
TX VCO
& LO
TX PLL
TCXO BUFFER
TX
Control Part
RX
_L
O
IO
TCXO
TX
_
O
N
TX_
C
P_
H
O
L
D
RX PLL
TX_PDA_OUT
CDMA
SPI
TX
_
C
P
TX
_LO
IO
RX1_PLNA_IN
RX1_CLNA_BIAS
RX1_CLNA_IN
RX1_IP
RX1_IM
RX1_QP
RX1_QM
RX1_PLNA_BIAS
RX
1_C
MI
X
_ IN
M
RX
1_C
MI
X
_
IN
P
RX
1_P
MI
X
_ IN
M
RX
1_P
MI
X
_ IN
P
LOAD
CSF
CSF
RX
BIAS
RX
_RB
IAS
LOAD
CSF
CSF
RxVCO
& LO RX2_PLNA_IN
RX2_CLNA_BIAS
RX2_CLNA_IN
RX2_PLNA_BIAS
RX2_IP
RX2_IM
RX2_QP
RX2_QM
RX
2
_
P
L
NA
_OU
T
RX
2
_
CL
NA
_OU
T
RX
2
_
CM
IX
_
INM
RX
2
_
CM
IX
_
INP
R
X
2_
P
M
IX
_IN
M
RX
2_P
MI
X
_
IN
P
LOC
K
RX
1_P
LNA
_
OU
T
RX
1_C
LNA
_ O
U
T
For latest specifications, technical questions and additional product information, visit website or e-mail
FCI Inc.
11 th Floor, Kins Tower, 25-1 Website: http://www.fci.co.kr
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