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MAX2839ETN+MAXIMN/a166avai2.3GHz to 2.7GHz MIMO Wireless Broadband RF Transceiver
MAX2839ETN+TMAXIMN/a404avai2.3GHz to 2.7GHz MIMO Wireless Broadband RF Transceiver


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MAX2839ETN+-MAX2839ETN+T
2.3GHz to 2.7GHz MIMO Wireless Broadband RF Transceiver
General Description
The MAX2839 direct conversion, zero-IF, RF transceiver
is designed specifically for 2GHz 802.16e MIMO mobile
WiMAX® systems. The device incorporates one transmit-
ter and two receivers, with > 40dB isolation between each
receiver. The MAX2839 completely integrates all circuitry
required to implement the RF transceiver function, pro-
viding 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 40Hz frequency steps and a crystal oscil-
lator that allows the use of a low-cost crystal in place
of a TCXO. The transceiver IC also integrates circuits
for on-chip DC-offset cancellation, I/Q error, and carrier
leakage detection circuits. An internal transmit to receive
loopback mode allows for receiver I/Q imbalance calibra-
tion. The local oscillator I/Q quadrature phase error can
be digitally corrected in approximately 0.125° steps. 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 MAX2839 completely eliminates the need for an
external SAW filter by implementing on-chip program-
mable monolithic filters for both the receiver and transmit-
ter, for all 2GHz and 802.16e profiles and WIBRO. The
baseband filters along with the Rx and Tx signal paths
are optimized to meet the stringent noise figure and lin-
earity specifications. The device supports up to 2048 FFT
OFDM and implements programmable channel filters for
3.5MHz to 20MHz RF channel bandwidths. The trans-ceiver requires only 2μs Tx-Rx switching time. The IC
is available in a small 56-pin TQFN package measuring
8mm x 8mm x 0.8mm.
Applications
●802.16e Mobile WiMAX Systems●Korean WIBRO Systems●Proprietary Wireless Broadband Systems●802.11g or n WLAN with MRC or MIMO Down Link
Beneits and Features
●2.3GHz to 2.7GHz Wideband Operation●Dual Receivers for MIMO, Single Transmitter●Complete RF Transceiver, PA Driver, and Crystal
Oscillator 2.3dB Rx Noise Figure on Each Receiver -35dB Rx EVM for 64QAM Signal 0dBm Linear OFDM Transmit Power (64QAM) -70dBr Tx Spectral Emission Mask -35dBc LO Leakage Automatic Rx DC Offset Correction Monolithic Low-Noise VCO with -39dBc Integrated Phase Noise Programmable Rx I/Q Lowpass Channel Filters Programmable Tx I/Q Lowpass Anti-Aliasing Filters Sigma-Delta Fractional-N PLL with < 40Hz Step 62dB Tx Gain Control Range with 1dB Step Size, Digitally Controlled 95dB Rx Gain Control Range with 1dB Step Size, Digitally Controlled 60dB Analog RSSI Instantaneous Dynamic
Range 4-Wire SPI Digital Interface I/Q Analog Baseband Interface Digital Tx/Rx Mode Control Digitally Tuned Crystal Oscillator On-Chip Digital Temperature Sensor Readout●+2.7V to +3.6V Transceiver Supply●Low-Power Shutdown Current●Small, 56-Pin TQFN Package (8mm x 8mm x 0.8mm)
Pin Configuration and Block Diagram/Typical Operating
Circuit appear at end of data sheet.

WiMAX is a registered certification mark and registered service
mark of the WiMAX Forum.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP = Exposed pad.
D = Dry pack.
PARTTEMP RANGEPIN-PACKAGE

MAX2839ETN+TD-40°C to +85°C56 TQFN-EP*
MAX28392.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
Ordering Information
EVALUATION KIT AVAILABLE
VCC_ Pins to GND.................................................-0.3V to +3.6V
RF Inputs: RXINA+, RXINA-, RXINB+,
RXINB- to GND............................................AC-Coupled Only
RF Outputs: TXOUT+, TXOUT- to GND.................-0.3V to +3.6V
Analog Inputs: TXBBI+, TXBBI-, TXBBQ+,
TXBBQ- to GND................................................-0.3V to +3.6V
Analog Input: REFCLK, XTAL1........................-0.3V to +3.6VP-P
Analog Outputs: RXBBIA+, RXBBIA-, RXBBQA+, RXBBQA-,
RXBBIB+, RXBBIB-, RXBBQB+, RXBBQB-, CPOUT+,
CPOUT-, PABIAS, RSSI to GND.......................-0.3V to +3.6V
Digital Inputs: RXTX, CS, SCLK, DIN,
B0–B7, LOAD, RXHP, ENABLE to GND...........-0.3V to +3.6V
Digital Outputs: DOUT, CLKOUT ..........................-0.3V to +3.6V
Bias Voltages: VCOBYP .......................................-0.3V to +3.6V
Short-Circuit Duration on All Output Pins................................10s
RF Input Power: All RXIN_..............................................+15dBm
RF Output Differential Load VSWR: All TXOUT.......................6:1
Continuous Power Dissipation (TA = +70°C)
56-Pin TQFN (derate 31.3mW/°C above +70°C).......2500mW
Operating Temperature Range..............................-40°C to +85°C
Junction Temperature.......................................................+150°C
Storage Temperature Range...............................-65°C to +160°C
Lead Temperature (soldering, 10s)...................................+300°C
(MAX2839 Evaluation Kit, VCC_ = 2.7V to 3.6V, TA = -40°C to +85°C, Rx set to the maximum gain. RXTX set according to operating
mode, ENABLE = CS = high, SCLK = DIN = low, no input signal at RF inputs, all RF inputs and outputs terminated into 50Ω. 90mVRMS
differential I and Q signals (1MHz) applied to I, Q baseband inputs of transmitter in transmit mode, all registers set to recommended
settings and corresponding test mode, unless otherwise noted. Typical values are at VCC_ = 2.8V, fLO = 2.5GHz and TA = +25°C,
unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS

Supply VoltageVCC_2.73.6V
Supply Current
Shutdown mode, TA = +25°C2µA
Clock-out only mode1.43.5
Standby mode3245
Rx mode One receiver ON7695
Both receivers ON117145
Tx mode16 QAM116
64 QAM (Note 4)140170
Rx calibration mode, both receivers ON153195
Tx calibration mode102135
Rx I/Q Output Common-Mode
Voltage
D9:D8 = 00 in A4:A0 = 001000.851.01.2D9:D8 = 01 in A4:A0 = 001001.1
D9:D8 = 10 in A4:A0 = 001001.2
D9:D8 = 11 in A4:A0 = 001001.35
Tx Baseband Input Common-
Mode Voltage Operating RangeDC-coupled0.51.2V
Tx Baseband Input Bias CurrentSource current1020µA
LOGIC INPUTS: RXTX, ENABLE, SCLK, DIN, CS, B7:B0, LOAD, RXHP

Digital Input Voltage High, VIHVCC - 0.4V
Digital Input Voltage Low, VIL0.4V
MAX28392.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
DC Electrical Characteristics Table
CAUTION! ESD SENSITIVE DEVICE
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.4999GHz, fLO = 2.5GHz; baseband output signal frequency = 100kHz,
fREF = 40MHz, ENABLE = RXTX = CS = high, SCLK = DIN = low, with power matching for the differential RF pins using the typical
applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. Lowpass filter is set
to 10MHz RF channel BW. Unmodulated single tone RF input signal is used with specifications which normally apply over the entire
operating conditions, unless otherwise indicated.) (Note 1)
(MAX2839 Evaluation Kit, VCC_ = 2.7V to 3.6V, TA = -40°C to +85°C, Rx set to the maximum gain. RXTX set according to operating
mode, ENABLE = CS = high, SCLK = DIN = low, no input signal at RF inputs, all RF inputs and outputs terminated into 50Ω. 90mVRMS
differential I and Q signals (1MHz) applied to I, Q baseband inputs of transmitter in transmit mode, all registers set to recommended
settings and corresponding test mode, unless otherwise noted. Typical values are at VCC_ = 2.8V, fLO = 2.5GHz and TA = +25°C,
unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS

Digital Input Current Low, IIL -1+1µA
LOGIC OUTPUTS: DOUT, CLKOUT

Digital Output Voltage High, VOHSourcing 100µAVCC - 0.4V
Digital Output Voltage Low, VOLSinking 100µA0.4V
PARAMETERCONDITIONSMINTYPMAXUNITS
RF INPUT TO I, Q BASEBAND-LOADED OUTPUT

RF Input Frequency Range2.32.7GHz
Peak-to-Peak Gain Variation over
RF Input Frequency RangeTested at band edges and band center0.8dB
RF Input Return LossAll LNA settings12dB
Total Voltage GainTA = -40°C to
+85°C
Maximum gain, B7:B0 = 00000009099Minimum gain, B7:B0 = 1111111513
RF Gain Steps
From max RF gain to max RF gain - 8dB 8From max RF gain to max RF gain - 16dB16
From max RF gain to max RF gain - 32dB32
Gain Change Settling Time
Any RF or baseband gain change; gain settling to within
±1dB of steady state; RXHP = 1200
Any RF or baseband gain change; gain settling to within
±0.1dB of steady state; RXHP = 12000
Baseband Gain RangeFrom maximum baseband gain (B5:B0 = 000000) to
minimum gain (B5:B0 = 111111), TA = -40°C to +85°C 586366dB
Baseband Gain Minimum
Step Size1dB
DSB Noise Figure
Voltage gain = 65dB with max RF gain (B7:B6 = 00)2.3
Voltage gain = 50dB with max RF gain - 8dB (B7:B6 = 01)5.5
Voltage gain = 45dB with max RF gain - 16dB
(B7:B6 = 10)13
Voltage gain = 15dB with max RF gain - 32dB 27
MAX28392.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
AC Electrical Characteristics Table—Rx MODE
DC Electrical Characteristics Table (continued)
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.4999GHz, fLO = 2.5GHz; baseband output signal frequency = 100kHz,
fREF = 40MHz, ENABLE = RXTX = CS = high, SCLK = DIN = low, with power matching for the differential RF pins using the typical
applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. Lowpass filter is set
to 10MHz RF channel BW. Unmodulated single tone RF input signal is used with specifications which normally apply over the entire
operating conditions, unless otherwise indicated.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS

Out-of-Band Input IP3 (Note 2)
AGC set for -65dBm wanted signal, max RF gain
(B7:B6 = 00)-13
dBm
AGC set for -55dBm wanted signal, max RF gain
- 8dB (B7:B6 = 01)-9
AGC set for -40dBm wanted signal, max RF gain
- 16dB (B7:B6 = 10)-7
AGC set for -30dBm wanted signal, max RF gain
- 32dB (B7:B6 = 11)+16
Inband Input P-1dB
Max RF gain (B7:B6 = 00)-37
dBmMax RF gain - 8dB (B7:B6 = 01)-29
Max RF gain - 16dB (B7:B6 = 01)-21
Max RF gain - 32dB (B7:B6 = 11)-4
Maximum Output Signal LevelOver passband frequency range; at any gain setting;
1dB compression point1.5VP-P
I/Q Gain Imbalance100kHz IQ baseband output; 1 σ variation0.1dB
I/Q Phase Error100kHz IQ baseband output; 1 σ variation0.125Degrees
Rx I/Q Output Load
Impedance (R || C)
Minimum differential resistance10kΩ
Maximum differential capacitance5pF
Loopback Gain (for Receiver I/Q
Calibration)
Transmitter I/Q input to receiver I/Q output; transmitter
B6:B1 = 000011, receiver B5:B0 = 101000 programmed
through SPI0+5dB
I/Q Output DC Droop
After switching RXHP to 0; average over 1µs after any
gain change, or 2µs after receive enabled with 100Hz
AC-couplingV/s
I/Q Static DC OffsetNo RF input signal; measure at 3µs after receive enable; RXHP = 1 for 0 to 2µs and set to 0 after 2µs, 1σ variation2mV
Isolation Between Rx
Channels A and BAny RF gain settings40dB
RECEIVER BASEBAND FILTERS

Baseband Filter Rejection
At 15MHz57At 20MHz75
At > 40MHz90
Baseband Highpass Filter Corner
Frequency
RXHP = 1 (used before AGC completion)650
kHzRXHP = 0 (used after AGC
completion) address A4:A0 = 01110
D5:D4 = 000.1
D5:D4 = 011
D5:D4 = 1030
MAX28392.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
AC Electrical Characteristics Table—Rx MODE (continued)
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.4999GHz, fLO = 2.5GHz; baseband output signal frequency = 100kHz,
fREF = 40MHz, ENABLE = RXTX = CS = high, SCLK = DIN = low, with power matching for the differential RF pins using the typical
applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. Lowpass filter is set
to 10MHz RF channel BW. Unmodulated single tone RF input signal is used with specifications which normally apply over the entire
operating conditions, unless otherwise indicated.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS

RF Channel BW Supported by
Baseband Filter
A4:A0 = 00100 serial bits D9:D6 = 00001.75
MHz
A4:A0 = 00100 serial bits D9:D6 = 00012.25
A4:A0 = 00100 serial bits D9:D6 = 00103.5
A4:A0 = 00100 serial bits D9:D6 = 00115.0
A4:A0 = 00100 serial bits D9:D6 = 01005.5
A4:A0 = 00100 serial bits D9:D6 = 01016.0
A4:A0 = 00100 serial bits D9:D6 = 01107.0
A4:A0 = 00100 serial bits D9:D6 = 01118.0
A4:A0 = 00100 serial bits D9:D6 = 10009.0
A4:A0 = 00100 serial bits D9:D6 = 100110.0
A4:A0 = 00100 serial bits D9:D6 = 101012.0
A4:A0 = 00100 serial bits D9:D6 = 101114.0
A4:A0 = 00100 serial bits D9:D6 = 110015.0
A4:A0 = 00100 serial bits D9:D6 = 110120.0
A4:A0 = 00100 serial bits D9:D6 = 111024.0
A4:A0 = 00100 serial bits D9:D6 = 111128.0
Baseband Gain Ripple
0 to 2.3MHz for BW = 5MHz 1.3
dBP-P0 to 4.6MHz for BW = 10MHz1.3
Baseband Group Delay Ripple0 to 2.3MHz for BW = 5MHz 90nsP-P
0 to 4.6MHz for BW = 10MHz50
Baseband Filter Rejection for
5MHz RF Channel BW
At 3.3MHz6dBAt > 21MHz85
Baseband Filter Rejection for
10MHz RF Channel BW
At 6.7MHz6dBAt > 41.6MHz85
RSSI

RSSI Minimum Output VoltageRLOAD ≥ 10kΩ0.4V
RSSI Maximum Output VoltageRLOAD ≥ 10kΩ2.2V
RSSI Slope30mV/dB
RSSI Output Settling TimeTo within 3dB of steady state +32dB signal step200ns
-32dB signal step800
MAX28392.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
AC Electrical Characteristics Table—Rx MODE (continued)
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