ML2724
2.4GHz Low-IF 1.5Mbps FSK Transceiver
Final Datasheet
GENERAL DESCRIPTION
FEATURES
The ML2724 is a fully integrated 1.5Mbps frequency
shift keyed (FSK) transceiver that operates in the
unlicensed 2.4GHz 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. Closed loop
modulation eliminates frequency drift and permits
practically unlimited TX duration. The transmitter
generates a 3dBm FSK output signal.
Complete 2.4GHz FSK Transceiver
- High data rate (1.5Mbps)
- -81dBm sensitivity @ 0.1% BER (typ)
- 3dBm Output Power (differential, typ)
Closed Loop TX Modulation
Low IF Receiver: No external IF filters required.
Fully Integrated frequency synthesizer:
- No external resonator required.
Sigma-Delta Fractional-N two-port modulator
Automatic Filter Alignment
The 1.5Mbps data rate permits data spreading, such as
Direct Sequence Spread Spectrum (DSSS) modulation,
which improves range. The dual conversion Low-IF
receiver has all of the sensitivity and selectivity
advantages of a traditional super-heterodyne without
requiring costly, bulky external filters, while providing
the integration advantages of direct conversion.
- No manufacturing adjustments required.
No external data slicer components required
Control outputs correctly sequence and control PA
3-wire control interface
The phase locked loop (PLL) synthesizer is completely
integrated, including the voltage controlled oscillator
(VCO), tuning circuits, and VCO resonator. This allows
the ML2724 to be used in frequency hopped spread
spectrum (FHSS) applications.
Analog RSSI output
The ML2724 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 “Green” Pb-Free 32TQFP.
APPLICATIONS
2.4GHz FSK Data Transceivers
- Digital Cordless Telephones
- Wireless PC Peripherals
- Wireless Game Controllers
- Wireless Streaming Media
PIN CONFIGURATION
32 31 30 29 28 27 26 25
VCCA
XCEN
RXON
PAON
EN
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
BLOCK DIAGRAM
RVLO
TXOB
AOUT
TXO
F
to
V
Quadrature
Downmixers
DATA
CLK
GNDRXMX2
GNDRXMX
GNDRF
RXI
RXI
2.4 GHz
Receive Input
DOUT
Receive Data
Out
AOUT
VSS
Filter
Alignment
RSSI
RSSI
9
10 11 12 13 14 15 16
Test Mux
Divide
by 2
TPC
PAON
RXON
XCEN
Quadrature
Divider
Parallel
control lines
Mode
Control
Transmit
Mixer
ORDERING INFORMATION
TXO/TXOB
2.4 GHz
Output
Two-port
DIN
2
Modulator
Transmit Data In
DATA
Serial
PART #
TEMP RANGE
PACKAGE
PACK (QTY)
Control
Registers
CLK
Control Bus
1.6 GHz
VCO
EN
ML2724DH -10oC to +60 oC 32TQFP 7x7x1mm Antistatic Tray (250)
ML2724DH-T -10oC to +60 oC 32TQFP 7x7x1mm Tape & Reel (2500)
PLL
Divider
Ref.
Divider
P.D.
FREF
Frequency
Reference
Bandgap
VTUNE
QPO
PLL Loop
Filter
DS2724-F-03
DECEMBER 2005
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