MAX2837 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – 2.3GHz to 2.7GHz Wireless Broadband RF Transceiver

19-0806; Rev 1; 11/08
EVAALVUAAILTAIOBNLEKIT
2.3GHz to 2.7GHz Wireless
Broadband RF Transceiver
General Description
The MAX2837 direct-conversion zero-IF RF transceiver
is designed specifically for 2.3GHz to 2.7GHz wireless
broadband systems. The MAX2837 completely inte-
grates all circuitry required to implement the RF trans-
ceiver function, providing RF-to-baseband receive path;
and baseband-to-RF transmit path, VCO, frequency
synthesizer, crystal oscillator, and baseband/control
interface. The device includes a fast-settling sigma-
delta RF synthesizer with smaller than 20Hz frequency
steps and a crystal oscillator, which allows the use of a
low-cost crystal in place of a TCXO. The transceiver IC
also integrates circuits for on-chip DC offset cancella-
tion, I/Q error, and carrier-leakage detection circuits.
Only an RF bandpass filter (BPF), crystal, RF switch,
PA, and a small number of passive components are
needed to form a complete wireless broadband RF
radio solution.
The MAX2837 completely eliminates the need for an
external SAW filter by implementing on-chip monolithic
filters for both the receiver and transmitter. The baseband
filters along with the Rx and Tx signal paths are optimized
to meet stringent noise figure and linearity specifications.
The device supports up to 2048 FFT OFDM and imple-
ments programmable channel filters for 1.75MHz to
28MHz RF channel bandwidths. The transceiver requires
only 2µs Tx-Rx switching time, which includes frequency
transient settling. The IC is available in a small, 48-pin thin
QFN package measuring only 6mm x 6mm x 0.8mm.
Applications
802.16-2004 Fixed WiMAX
Korea Wibro and 802.16e Mobile WiMAX
Dual Mode^TM WiMAX/802.11b/g Wi-Fi
Proprietary Wireless Broadband Systems
4G/LTE Systems
Dual Mode is a trademark of Maxim Integrated Products, Inc.
SPI is a trademark of Motorola, Inc.
Features
♦ 2.3GHz to 2.7GHz Wideband Operation
♦ Complete RF Transceiver, PA Driver, and
Crystal Oscillator
0dBm Linear OFDM Transmit Power
-70dBr Tx Spectral Emission Mask
2.3dB Rx Noise Figure
Tx/Rx I/Q Error and LO Leakage Detection
Monolithic Low-Noise VCO with -39dBc
Integrated Phase Noise
Programmable Tx I/Q Lowpass
Anti-Aliasing Filter
Sigma-Delta Fractional-N PLL with
20Hz Step Size
45dB Tx Gain-Control Range
94dB Receive Gain-Control Range
60dB Analog RSSI Instantaneous
Dynamic Range
4-Wire SPI™ Digital Interface
I/Q Analog Baseband Interface
Digitally Tuned Crystal Oscillator
On-Chip Digital Temperature Sensor Read-Out
♦ +2.7V to +3.6V Transceiver Supply
♦ Low-Power Shutdown Current
♦ Small 48-Pin Thin QFN Package
(6mm x 6mm x 0.8mm)
Ordering Information
PART
TEMP RANGE
MAX2837ETM+TD -40°C to +85°C
*EP = Exposed paddle.
+Denotes a lead-free package.
PIN-
PACKAGE
48 TQFN-EP*
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For information on other Maxim products, visit Maxim’s website at www.maxim-ic.com.