ML2713 Datasheet, PDF (1/18 Pages) Micro Linear Corporation – ML2713 Radio IF Transceiver

PRELIMINARY
ML2713 Radio IF Transceiver
GENERAL DESCRIPTION
The ML2713 combined with the ML2712 forms an
FSK (Frequency Shift Keying) 2.4 GHz radio chipset
for systems based on IEEE802.11 and other wireless
communication protocols using the 2.4HGz ISM band.
The ML2713 is the complete IF section of Micro Linear’s
2.4GHz frequency hopping, half duplex radio transceiver
chipset. The chip’s down conversion super-heterodyne
receiver circuit contains an image reject down-convert
mixer, a limiter, a discriminator, a receive data filter and
a tracking A/D converter. The chips transmit circuit
contain a 6 bit D/A converter to digitally modulate the IF,
an anti alias filter and an image reject up-convert mixer.
APPLICATIONS
n 2.4GHz FSK radios
n PC Card and FlashCard Wireless Transceivers
n Systems based on IEEE802.11 1Mbps and 2Mbps
Standard
n TDMA Radio IF circuits
SIMPLIFIED BLOCK DIAGRAM
FEATURES
n Highly integrated IF transceiver
n Data rates up to 4Mbps
n Integrated discriminator and filter alignment circuits
n High signal to noise ratio at the discriminator output
n Received signal strength indicator (RSSI)
n D/A Converter for digitally generated IF
n Low sleep mode current - typically less than 1mA
n 3.0V to 5.5V operation
n Fast 10msec switch time between transmit and receive
modes
n 48 Pin TQFP, 7mm body
ML2731
Bias
Controller
Transmit
Power
Amplifier
R. C.
Loop
Filter
ML2712
2LO Loop
Filter &
Tank Circuit
1LO Loop
Filter &
Tank Circuit
3
Baseband
Controller
6
(e.g., MSM7730B)
2LO
Input
Image Reject Rx IF
Downconverter
Tx Regulator
Output
Image Reject Tx
IF Upconverter
DC
Reg
Reference
Frequency
Input
32MHz
Clock
RSSI
Limiter
ML2713
Discrim-
inator
Quad &
Filter
Auto Align
Data Filter
DC
Restore
Control
Circuits
DAC
Control
Interface
D/A
Input
+ ^{Rx Out}
–
PRELIMINARY DATASHEET ^{January, 2000}