ML2726 Datasheet, PDF (1/25 Pages) SIRENZA MICRODEVICES – 2.4GHz Low-IF 2.0Mbps FSK Transceiver

ML2726
2.4GHz Low-IF 2.0Mbps FSK Transceiver
Preliminary Datasheet
GENERAL DESCRIPTION
The ML2726 is a fully integrated 2.0Mbps 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.
The 2.0Mbps 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.
The phase locked loop (PLL) synthesizer is completely
integrated, including the voltage controlled oscillator
(VCO), tuning circuits, and VCO resonator. This allows
the ML2726 to be used in frequency hopped spread
spectrum (FHSS) applications.
The ML2726 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.
PIN CONFIGURATION
XCEN
RXON
PAON
EN
DATA
CLK
AOUT
VSS
132 ^{31 30 29 28 27 26 2524}
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
VCCA
RVLO
TXOB
TXO
GNDRXMX2
GNDRXMX
GNDRF
RXI
ORDERING INFORMATION
PART # TEMP RANGE PACKAGE
PACK (QTY)
ML2726DH -10^oC to +60 ^oC 32TQFP 7x7x1mm Antistatic Tray (250)
ML2726DH-T -10^oC to +60 ^oC 32TQFP 7x7x1mm Tape & Reel (2500)
OCT 2007
FEATURES
ƒ Complete 2.4GHz FSK Transceiver
- High data rate (2.048 Mbps)
- -80dBm sensitivity @ 0.1% BER (typ)
- 3dBm Output Power (differential, typ)
ƒ Closed Loop TX Modulation
ƒ Low IF Receiver: No external IF filters required.
ƒ Fully Integrated frequency synthesizer:
- No external resonator required.
ƒ Sigma-Delta Fractional-N two-port modulator
ƒ Automatic Filter Alignment
- No manufacturing adjustments required.
ƒ No external data slicer components required
ƒ Control outputs correctly sequence and control PA
ƒ 3-wire control interface
ƒ Analog RSSI output
APPLICATIONS
ƒ 2.4GHz FSK Data Transceivers
- Digital Cordless Telephones
- Wireless PC Peripherals
- Wireless Game Controllers
- Wireless Streaming Media
BLOCK DIAGRAM
RXI
2.4 GHz
Receive Input
TXO/TXOB
2.4 GHz
Output
Transmit
Mixer
2
Bandgap
Quadrature
Downmixers
Filter
Alignment
Divide
by 2
Quadrature
Divider
F
to
V
RSSI
Test Mux
Mode
Control
Two-port
Modulator
1.6 GHz
VCO
PLL
Divider
P.D.
Control
Registers
Ref.
Divider
AOUT
DOUT
Receive Data
Out
RSSI
TPC
PAON
RXON
XCEN
Parallel
control lines
DIN
Transmit Data In
DATA _Serial
CLK _{Control Bus}
EN
FREF
Frequency
Reference
VTUNE
QPO
PLL Loop
Filter
EDS-105982 REV P01