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Future
M
T
M
Communications
Multi-band & Multi-mode LTE and HSPA+ applications
Integrated circuit Inc.
Direct-conversion Wireless Transceiver IC for
FC7850
D
ESCRIPTION
FC7850 is a multi-band and multi-mode LTE and
HSPA+ RF-to-baseband transceiver IC with
receiver diversity of FCI’s zipRF™ family. FC7850
covers almost all the frequency bands from 1 to 40.
It is a highly integrated chip working with dual
supply voltage such as 1.2V and 1.8V. Because
zero-IF architecture is used for FC7850, additional
components such as bulky IF SAW filters and other
IF matching components are no longer required.
The 4-wired serial-to-parallel interface (SPI)
enables FC7850 to operate in various modes.
FC7850 contains complete multi-band receiver
diversity path such as LNA, down-conversion mixer,
channel selection filter (CSF), baseband
programmable gain amplifier (PGA), Rx VCO, Rx
PLL, and LO distribution block. FC7850 also
contains complete transmitter path such as
baseband amplifier, up-converter, RF
programmable gain amplifier (PGA), programmable
drive amplifier, Tx VCO, Tx PLL, and LO distribution
block. FC7850 is available in 7mm x 7mm BGA
package.
FC7850 support FDD/TDD duplexing method.
For TDD operation, the TX_ON hardware pin exists.
Also SPI controlled TDD operation is supported.
During TDD operation, the TX PLL and TX VCO is
deactivated and RX PLL and RX VCO is operating
as a common PLL and VCO during TX and RX
operation.
A
PPLICATIONS
-
Multi-band HSPA+ mobile phone
-
Multi-band LTE & HSPA+ mobile phone
F
EATURES
Complete 2x1 MIMO receiver diversity transceiver
covering multi-band (Band1~40) supporting
HSPA+/HSPA/FDD-LTE/TDD-LTE applications
Modem assisted TX LO leakage, TX I/Q and RX
DC offset calibration
Self-calibrated VCO and RX and TX filter cut-off
frequency
Fully integrated low phase noise Rx and Tx
VCO and Fractional-N PLL with fine frequency
resolution
Greater than 85-dB transmitter output power
control and greater than 95-dB receiver gain
control
7mm x 7mm small leadless BGA package
B
LOCK DIAGRAM
RX2_LB1(d)
RX2_LB2(d)
RX2_MB1(d)
RX2_MB2(d)
RX2_MB3(d)
RX2_HB1(d)
RX1_LB1(d)
RX1_LB2(d)
RX1_MB1(d)
RX1_MB2(d)
RX1_MB3(d)
RX1_HB1(d)
LPF
PGA
Envelop
Detector
TX1_LB1(d)
TX1_LB2(d)
TX1_MB1(d)
TX1_MB2(d)
TX1_MB3(d)
TX1_HB1(d)
FDD/TDD
RX1_LO
RX2_LO
TX1_LO
RFPDA
PGA2
CSF
PGA1
MIX
PGA2
CSF
PGA1
MIX
BB
MUX
RX VCO
RFPGA
RX
LO Chain
TX
LO Chain
RX
PLL
TX VCO
TX
PLL
MIX
PGA1
CSF
MUX
MUX
TCXO
TDD
Control
PGA3
PGA3
Buffer
RX2_IP
RX2_IM
RX2_QP
RX2_Q
RX1_IP
RX1_IM
RX1_QP
RX1_Q
TCXO
RTX_ON
SPI_CK
SPI_rDT
SPI
SPI_wD
SPI_ST
TX_IP
TX_IM
TX_QP
TX_QM
R
EVISION HISTORY
-
Preliminary
-
Preliminary
-
Preliminary
version: Apr, 25, 2011.
version: May, 11, 2011.
version: July, 04, 2011.
FCI Inc.
th
Floor, Kins Tower, 25-1 Website: http://www. f ci .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
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Last Update July/04/2011
These materials could be changed without prior notice.
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