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Silicon Motion FC7785W User Manual

Fc7785w, Escription, Pplications

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FC7785W

Dual-band (Low/High Band)CDMA

1x/EVDO Rev.A Diversity Transceiver

FCI Confidential and Proprietary Information

1 / 19

Last updated at Apr/08/2013

The data can be changed without prior notice.

Future
Communications
Integrated circuit Inc.

D

ESCRIPTION

FC7785W is a dual-band CDMA transceiver with

receiver diversity FCI’s zipRF™ family. The

FC7785W uses the same die with FC7785 with

different package type. The FC7785W covers BC0,

BC1, BC4, BC10, and BC14 band class. It is a

highly integrated chip working with a single power

supply. Because zero-IF architecture is used for

FC7785W, additional components such as bulky IF

SAW filters and other IF matching components are

no longer required. FC7785W is featured to operate

in the high data rate EVDO. Three-wired serial-to-

parallel interface (SPI) protocol enables FC7785W

to operate in the various modes. FC7785W

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. FC7785W 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. FC7785W is optimized to have

high SNR in 1x and EVDO Rev.A receive and

transmit mode. FC7785W is available in 4.87 x 4.79

mm WLCSP package. The max. height of the

package is 0.65mm.

A

PPLICATIONS

-

Dual-band CDMA 1x/EVDO Rev.A diversity
mobile phone or data card.

R

EVISION

H

ISTORY

-

Preliminary version release: Jan, 20, 2012

-

Preliminary version release: Apr, 10, 2012

-

Preliminary version release: Apr, 08, 2013

F

EATURES

 Single-chip dual-band (Low-band and High-band) receiver

diversity transceiver without need of external LNA

 FC7785W covers band class of BC0, BC1, BC4, BC10, and

BC14.

 Low noise and highly linear LNA, mixer, and CSF for

Low-band/High-band 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

 WLCSP package with dimension of 4.87 x 4.79 mm with

max. height of 0.65mm.

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