The ML2722 is a fully integrated 1.5Mbps frequency
shift keyed (FSK) transceiver that operates in the
unlicensed 900MHz ISM frequency band. The device
has been optimized for digital cordless telephone
applications and includes all the frequency generation,
receive and transmit functions. Automatically adjusted
filters eliminate mechanical tuning. The transmitter
generates a -1 dBm FSK output signal. The single
conversion Low-IF receiver has all the sensitivity and
selectively advantages of a traditional super-
heterodyne without requiring costly, bulky external
filters, while providing the integration advantages of
direct conversion.
The phase locked loop (PLL) synthesizer is completely
integrated, including the voltage controlled oscillator
(VCO), tuning circuits, and VCO resonator. This allows
the ML2722 to be used in frequency hopped spread
spectrum (FHSS) applications.
The ML2722 contains internal voltage regulation. It also
contains PLL and transmitter configuration registers.
The device can be placed in a low power standby mode
for current sensitive applications. It is packaged in a
32TQFP.
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FEATURES
Single chip ISM band 900MHz Radio Transceiver
with -1 dBm transmit output power
1.5Mbps maximum data rate
Typical receiver sensitivity: -95dBm at 12.5% CER
Fully integrated frequency synthesizer with internal
VCO resonator
Automatic filter calibration: Requires no mechanical
tuning adjustments during manufacturing
Low IF Receiver: No external IF filters required
Control outputs correctly sequence and control
external PA
3-wire control interface
Analog RSSI output
APPLICATIONS
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900MHz FSK Data Transceivers
Digital Cordless Phones
Wireless Streaming Media
Wireless PC Peripherals
PIN CONFIGURATION
RSSI/TPI
RVCC7
RVCC6
DOUT
GND
VBG
VDD
DIN
BLOCK DIAGRAM
XCEN
RXON
PAON
EN
DATA
CLK
TPC/TPQ
VSS
32 31 30 29 28 27 26 25
1
24
2
3
4
5
6
7
8
9
23
22
21
20
19
18
17
10 11 12 13 14 15 16
VCC5
TRFO
RVCC4
RRFI
GND
GND
GND
GND
REF
RVCC1
RVCC3
VTUNE
VCC2
QPO
GND
ORDERING INFORMATION
PART NUMBER TEMPERATURE RANGE
ML2722DH
-10
o
C to +60
o
C
PACKAGE
32 Pin TQFP 7mm body
PUBLICATION
DS2722-F-05
DS2722-F-05
GND
DECEMBER 2003
ML2722
TABLE OF CONTENTS
GENERAL DESCRIPTION............................................................................................................................................1
ORDERING INFORMATION .........................................................................................................................................1
TABLE OF CONTENTS ................................................................................................................................................2
MODES OF OPERATION ...........................................................................................................................................15
DATA INTERFACES ....................................................................................................................................................18
CONTROL INTERFACES AND REGISTER DESCRIPTIONS ...................................................................................20
ORDERING INFORMATION .......................................................................................................................................27
Error on Page 21 Table 5 – Divide Ratio = fc / 0.512
Some graphics printed poorly to PDF.
DS2722-F-05
FINAL DATASHEET
DECEMBER 2003
2
ML2722
SIMPLIFIED APPLICATIONS DIAGRAM
ML2722
DOUT
IF DEMOD
CIRCUITS
RSSI
REF
ANTENNA
LNA
MATCHING
NETWORK
RRFI
IMAGE
REJECT
MIXER
PLL
CLK,
DATA,
3 EN
BASEBAND
IC
RF PIN
DIODE
SWITCH
SWITCH
DRIVERS
PAON,
TPC
2
CONTROL
LOGIC
XCEN,
2 RXON
PA
FILTER
TRFO
QUADRATURE
DIVIDE BY 2
TX DATA
FILTER
DIN
VCC5
TX RF
BUFFER
1.83GHz VCO
BATTERY
AND
PROTECTION
CIRCUITS
VTUNE
QPO
LOOP
FILTER
Figure 1. Simplified Application Diagram
DS2722-F-05
FINAL DATASHEET
DECEMBER 2003
3
ML2722
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute
maximum ratings are stress ratings only and functional device operation is not implied.
VDD, VCC5.................................................................................................................................................................6.0 V
Junction Temperature ............................................................................................................................................... 150°C
Storage Temperature Range.......................................................................................................................-65°C to 150°C
Lead Temperature (Soldering, 10s) .......................................................................................................................... 260°C
OPERATING CONDITIONS
Normal Temperature Range..........................................................................................................................-10°C to 60°C
VCC5 Range................................................................................................................................................... 2.7V to 4.5V
VDD Range (VCC5 = VDD) ............................................................................................................................ 2.7V to 4.5V
Unless otherwise specified, VCC5 & VDD = 2.7V to 3.8V, T
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