19-0806; Rev 1; 11/08
ATION
EVALU
AVAILA
KIT
BLE
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.
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
802.16-2004 Fixed WiMAX
Applications
? Low-Power Shutdown Current
? Small 48-Pin Thin QFN Package
(6mm x 6mm x 0.8mm)
Korea Wibro and 802.16e Mobile WiMAX
Dual Mode TM WiMAX/802.11b/g Wi-Fi
Ordering Information
Proprietary Wireless Broadband Systems
4G/LTE Systems
PART
MAX2837ETM+TD
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
48 TQFN-EP*
*EP = Exposed paddle.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
+Denotes a lead-free package.
SPI is a trademark of Motorola, Inc.
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For information on other Maxim products, visit Maxim’s website at www.maxim-ic.com.
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MAX2838ETM+T 功能描述:射频收发器 3.3-3.8GHz Wireless Broadband RF Txr RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
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