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AD6548 Datasheet Preview

AD6548 Datasheet

(AD6548 / AD6549) Single Chip GSM Radio

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GSM850/900/1800/1900
Single Chip GSM Radio
AD6548/9
FEATURES
Fully Integrated GSM Transceiver including
Direct Conversion Receiver
4 Differential LNAs
Integrated Active RX Channel Select Filters
Programmable Gain Baseband Amplifiers
Translation Loop Direct VCO Modulator
Integrated TX VCO and tank
External TX filters eliminated
Integrated Loop filter components
High performance multi band PLL system
Fast Fractional-N Synthesizer
Integrated Local Oscillator VCO
Fully Integrated Loop filters
Crystal Reference Oscillator & Tuning System (AD6548)
Power Management
Integrated LDOs allow direct battery supply connection
Small footprint
32-Lead 5 X 5 mm Chipscale Package
APPLICATIONS
Dual, Triple and Quad Band Radios
- GSM850, E-GSM 900, DCS1800 and PCS1900
- GPRS to Class 12- EDGE RX
VCC_FE 1
I2
IB 3
VCC_BBI 4
SDATA 5
SCLK 6
SEN 7
NC 8
AD6548/9
LFCSP-32
(5X5 mm)
24 VCC_BBQ
23 Q
22 QB
21 REF_OP
20 REFIN
19 REFINB
18 VAFC
1273 VCC_REF
GENERAL DESCRIPTION
The AD6548/9 provides a highly integrated direct conversion
radio solution that combines, on a single chip, all radio and
power management functions necessary to build the most com-
pact GSM radio solution possible. The only external components
required for a complete radio design are the Rx SAWs, PA,
Switchplexer and a few passives enabling an extremely small
cost effective GSM Radio solution.
The AD6548/9 uses the industry proven direct conversion re-
ceiver architecture of the OthelloTM family. For Quad band appli-
cations the front end features four fully integrated programmable
gain differential LNAs. The RF is then downconverted by quad-
rature mixers and then fed to the baseband programmable-gain
amplifiers and active filters for channel selection. The Receiver
output pins can be directly connected to the baseband analog
processor. The Receive path features automatic calibration and
tracking to remove DC offsets.
The transmitter features a translation-loop architecture for di-
rectly modulating baseband signals onto the integrated TX VCO.
The translation-loop modulator and TX VCO are extremely low
noise removing the need for external SAW filters prior to the PA.
The AD6548/9 uses a single integrated LO VCO for both the
receive and the transmit circuits. The synthesizer lock times are
optimized for GPRS applications up to and including class 12.
To dramatically reduce the BOM both TX Translational loop and
main PLL Loop Filters are fully integrated into the device.
www.DataSheet.co.kr
AD6548 incorporates a complete reference crystal calibration
system. This allows the external VCTCXO to be replaced with a
low cost crystal. No other external components are required. The
AD6549 uses the traditional VCTCXO reference source.
The AD6548/9 also contains on-chip low dropout voltage regula-
tors (LDOs) to deliver regulated supply voltages to the functions
on chip, with a battery input voltage of between 2.9V and 5.5V.
Comprehensive power down options are included to minimize
power consumption in normal use.
A standard 3 wire serial interface is used to program the IC. The
interface features low-voltage digital interface buffers compatible
with logic levels from 1.6V to 3.0V.
The AD6548/9 is packaged in a 5mm× 5mm , 32-lead LFCSP
package.
ORDERING GUIDE
Model
Temperature
Package
Range
AD6548BCPZ -20°C to +85°C
LFCSP-32
AD6549BCPZ -20°C to +85°C
LFCSP-32
Rev B (1st October 2007)
Information furnished by MediaTek is believed to be accurate and reliable.
However, no responsibility is assumed by MediaTek for its use, nor for any
infringements of patents or other rights of third parties that may result from
its use. No license is granted by implication or otherwise under any patent or
patent rights of MediaTek. Trademarks and registered trademarks are the
property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.mediatek.com
Fax: 781/326-8703
© 2008 MediaTek, Inc. All rights reserved.
Datasheet pdf - http://www.DataSheet4U.net/




MediaTek

AD6548 Datasheet Preview

AD6548 Datasheet

(AD6548 / AD6549) Single Chip GSM Radio

No Preview Available !

AD6548/9
VCC_TXVCO
PA Module
TXOP_HI
TX Loop
Filter
PFD
AD6548
GSM1800/1900
TXOP_LO
GSM850/900
VCC_FE
/2
Band
Control
TX_LO1
/4
TX_LO2
RX850
RX850B
RX900
RX900B
RX1800
RX1800B
DC Offset
Correction
DC Offset
Correction
RX1900
RX1900B
LNA Gain
Reduction
RX LO
Generator
SDATA
SCLK
SEN
TX_LO2
TX_LO1
TX LO
Generator
Serial
Interface
Frac-N Synth
Xtal Osc
+ Tuning
Supply
TX circuits
supply
LDO
Reg 3
LO VCO
Supply
LDO
Reg 2
General
Supply
LDO Ref
Reg 1
VDD
VBAT
VCC_
TXVCO
VLDO3
VLDO2
VLDO1
Figure 1 AD6548 & AD6549 Block Diagrams
VCC_TXVCO
PA Module
TXOP_HI
TX Loop
Filter
www.DataSheet.co.kr
PFD
AD6549
GSM1800/1900
TXOP_LO
GSM850/900
VCC_FE
RX850
RX850B
/2
Band
Control
TX_LO1
/4
TX_LO2
RX900
RX900B
RX1800
RX1800B
RX1900
RX1900B
LNA Gain
Reduction
RX LO
Generator
SDATA
SCLK
SEN
TX_LO2
TX_LO1
TX LO
Generator
Serial
Interface
DC Offset
Correction
DC Offset
Correction
Frac-N Synth
Supply
TX circuits
supply
LDO
Reg 3
LO VCO
Supply
LDO
Reg 2
General
Supply
LDO Ref
Reg 1
VDD
VBAT
VCC_
TXVCO
VLDO3
VLDO2
VLDO1
I
IB
VCC_BBI
VCC_BBQ
Q
QB
VAFC
REFINB
TXIB
TXI
RXI
RXIB
TXQ
TXQB
RXQ
RXQB
AFC
REFIN
REF_OP
CLK
VCC_REF
REF_OP
I
IB
VCC_BBI
VCC_BBQ
Q
QB
TXIB
TXI
RXI
RXIB
TXQ
TXQB
RXQ
RXQB
AFC
REFINB
VCTCXO
REF_OP
CLK
VCC_REF
REF_OP
Product characteristics and specifications are subject to change without notice. MediaTek assumes no obligation regarding future manufacture unless otherwise agreed to
in writing. No responsibility is assumed by MediaTek for its use; nor for any infringements of patents or other rights of third parties, which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of MediTek.
MediaTek Proprietary Information
-2-
Rev B
Datasheet pdf - http://www.DataSheet4U.net/


Part Number AD6548
Description (AD6548 / AD6549) Single Chip GSM Radio
Maker MediaTek
Total Page 26 Pages
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