19-4588; Rev 1; 5/10
KIT
ATION
EVALU
BLE
AVAILA
2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
General Description
Features
o
2.3GHz to 2.7GHz Wideband Operation
o
Dual Receivers for MIMO, Single Transmitter
o
Complete RF Transceiver, PA Driver, and Crystal
Oscillator
3.5dB Rx Noise Figure on Each Receiver with
Balun
-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 28.61Hz
Minimum Step Size
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
o
+2.7V to +3.6V Transceiver Supply
o
Low-Power Shutdown Current
o
Small WLP Package (5.16mm x 3.66mm x 0.5mm)
MAX2839AS
The MAX2839AS direct conversion, zero-IF, RF transceiver
is designed specifically for 2.3GHz to 2.7GHz 802.16e
MIMO mobile WiMAX™ systems. The device incorpo-
rates one transmitter and two receivers, with > 40dB iso-
lation between each receiver. The MAX2839AS
completely integrates all circuitry required to implement
the RF transceiver function, providing RF to baseband
receive path, and baseband to RF transmit path, VCO,
frequency synthesizer, crystal oscillator, and base-
band/control interface. The device includes a fast-set-
tling sigma-delta RF synthesizer with smaller than 40Hz
frequency steps and a crystal oscillator that allows the
use of a low-cost crystal in place of a TCXO. The trans-
ceiver 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 calibration. 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 MAX2839AS completely eliminates the need for an
external SAW filter by implementing on-chip program-
mable monolithic filters for both the receiver and trans-
mitter, 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 fil-
ters for 3.5MHz to 20MHz RF channel bandwidths. The
transceiver requires only 2µs Tx-Rx switching time. The
IC is available in a small wafer-level package (WLP)
measuring 5.16mm x 3.66mm x 0.5mm.
Applications
802.16e Mobile WiMAX Systems
Korean WiBro Systems
Proprietary Wireless Broadband Systems
802.11g or n WLAN with MRC or MIMO Down Link
Ordering Information
PART
MAX2839ASEWO+T
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
73 WLP
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
WiMAX is a trademark of the WiMAX Forum.
SPI is a trademark of Motorola, Inc.
Bump Configuration and Typical Operating Circuit appear at
end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
MAX2839AS
ABSOLUTE MAXIMUM RATINGS
V
CC_
Pins to GND..................................................-0.3V to +3.9V
RF Inputs: RXINA+, RXINA-, RXINB+,
RXINB- to GND ............................................AC-Coupled Only
RF Outputs: TXOUT+, TXOUT- to GND.................-0.3V to +3.9V
Analog Inputs: TXBBI+, TXBBI-, TXBBQ+,
TXBBQ- to GND.................................................-0.3V to +3.9V
Analog Input: REFCLK, XTAL1 .........................-0.3V to +3.9V
P-P
Analog Outputs: RXBBIA+, RXBBIA-, RXBBQA+, RXBBQA-,
RXBBIB+, RXBBIB-, RXBBQB+, RXBBQB-, CPOUT+,
CPOUT-, PABIAS, RSSI to GND........................-0.3V to +3.9V
Digital Inputs: TXRX,
CS,
SCLK, DIN, B7:B0,
CLKOUT_DIV, RXHP, ENABLE to GND ............-0.3V to +3.9V
Digital Outputs: DOUT, CLKOUT ..........................-0.3V to +3.9V
Bias Voltages: VCOBYP .......................................-0.3V to +3.9V
Short-Circuit Duration on All Output Pins ...............................10s
RF Input Power: All RXIN_ ..............................................+10dBm
RF Output Differential Load VSWR: All TXOUT .......................6:1
Continuous Power Dissipation (T
A
= +70°C)
73-Bump WLP (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
Soldering Temperature (reflow) .........................(Note 1) +260°C
Note 1:
Refer to Application Note 1891:
Understanding the Basics of the Wafer-Level Chip-Scale Package (WL-CSP)
available at
www.maxim-ic.com.
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.
CAUTION!
ESD SENSITIVE DEVICE
DC ELECTRICAL CHARACTERISTICS
(MAX2839AS Evaluation Kit. Unless otherwise noted, V
CC
_ = 2.7V to 3.6V, T
A
= -40°C to +85°C, Rx set to the maximum gain.
ENABLE and TXRX set according to operating mode.
CS
= high, SCLK = DIN = low, no input signal at RF inputs, all RF inputs and
outputs terminated into 50Ω. 90mV
RMS
differential I and Q signals (1MHz) applied to I, Q baseband inputs of transmitter in transmit
mode, all registers set to recommended settings. Typical values are at V
CC_
= 2.8V, f
LO
= 2.5GHz, and T
A
= +25°C.) (Note 2)
PARAMETER
Supply Voltage
V
CC
_
Shutdown mode, T
A
= +25°C; all logic inputs equal 0 or
V
CC
Clock-out only mode
Standby mode
Supply Current
Rx mode
Tx mode
One receiver on
Both receivers on
16 QAM
64 QAM (Note 3)
CONDITIONS
MIN
2.7
2
2.7
33
79
120
116
145
153
102
0.8
1.05
1.15
1.25
1.45
0.5
10
V
CC
- 0.4
0.4
-1
+1
1.2
20
V
µA
V
V
µA
3.8
50
101
148
148
183
200
145
1.35
V
mA
TYP
MAX
3.6
UNITS
V
µA
Rx calibration mode, both receivers on
Tx calibration mode
D[9:8] = 00 in A[4:0] = 00100
Rx I/Q Output Common-Mode
Voltage
D[9:8] = 01 in A[4:0] = 00100
D[9:8] = 10 in A[4:0] = 00100
D[9:8] = 11 in A[4:0] = 00100
Tx Baseband Input Common-
Mode Voltage Operating Range
Tx Baseband Input Bias Current
Digital Input-Voltage High, V
IH
Digital Input-Voltage Low, V
IL
Digital Input-Current High, I
IH
DC-coupled
Source current
LOGIC INPUTS: TXRX, ENABLE, SCLK, DIN,
CS,
B7:B0, CLKOUT_DIV, RXHP
2
_______________________________________________________________________________________
2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2839AS Evaluation Kit. Unless otherwise noted, V
CC
_ = 2.7V to 3.6V, T
A
= -40°C to +85°C, Rx set to the maximum gain.
ENABLE and TXRX set according to operating mode.
CS
= high, SCLK = DIN = low, no input signal at RF inputs, all RF inputs and
outputs terminated into 50Ω. 90mV
RMS
differential I and Q signals (1MHz) applied to I, Q baseband inputs of transmitter in transmit
mode, all registers set to recommended settings. Typical values are at V
CC_
= 2.8V, f
LO
= 2.5GHz, and T
A
= +25°C.) (Note 2)
PARAMETER
Digital Input-Current Low, I
IL
LOGIC OUTPUTS: DOUT, CLKOUT
Digital Output-Voltage High, V
OH
Digital Output-Voltage Low, V
OL
Sourcing 100µA
Sinking 100µA
V
CC
- 0.4
0.4
V
V
CONDITIONS
MIN
-1
TYP
MAX
+1
UNITS
µA
MAX2839AS
AC ELECTRICAL CHARACTERISTICS—Rx MODE
(MAX2839AS Evaluation Kit. Unless otherwise noted, V
CC_
= 2.8V, T
A
= +25°C, f
RF
= 2.4999GHz, f
LO
= 2.5GHz; baseband output
signal frequency = 100kHz, f
REF
= 40MHz, ENABLE = TXRX =
CS
= high, SCLK = DIN = low, with power matching for the differential
RF pins using the
Typical Operating Circuit
and registers set to default settings. Lowpass filter is set to 10MHz RF channel BW.
Unmodulated single-tone RF input signal is used.) (Note 2)
PARAMETER
RF INPUT TO I, Q BASEBAND-LOADED OUTPUT
RF Input Frequency Range
Peak-to-Peak Gain Variation over
RF Input Frequency Range
RF Input Return Loss
Total Voltage Gain
Tested at band edges and band center
All LNA settings
T
A
= -40°C to
+85°C
Maximum gain, B7:B0 = 0000000
Minimum gain, B7:B0 = 1111111
92
2.3
1.5
12
99
4
8
16
32
200
ns
Any RF or baseband gain change; gain settling to within
±0.1dB of steady state; RXHP = 1
Baseband Gain Range
Baseband Gain Step Size
Voltage gain = 65dB with max RF gain (B7:B6 = 00)
Voltage gain = 50dB with max RF gain - 8dB (B7:B6 = 01)
DSB Noise Figure
(Including Balun Loss)
Voltage gain = 45dB with max RF gain - 16dB
(B7:B6 = 10)
Voltage gain = 15dB with max RF gain - 32dB
(B7:B6 = 11)
From maximum baseband gain (B5:B0 = 000000) to
minimum gain (B5:B0 = 111111), T
A
= -40°C to +85°C
60.5
2000
63
1
3.5
8.5
14.5
32
dB
65.5
dB
dB
dB
10
2.7
GHz
dB
dB
dB
CONDITIONS
MIN
TYP
MAX
UNITS
From max RF gain (B7:B6 = 00) to max RF gain - 8dB
(B7:B6 = 01)
RF Gain Steps
From max RF gain to max RF gain - 16dB (B7:B6 = 10)
From max RF gain to max RF gain - 32dB (B7:B6 = 11)
Any RF or baseband gain change; gain settling to within
±1dB of steady state; RXHP = 1
Gain Change Settling Time
_______________________________________________________________________________________
3
2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver
MAX2839AS
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(MAX2839AS Evaluation Kit. Unless otherwise noted, V
CC_
= 2.8V, T
A
= +25°C, f
RF
= 2.4999GHz, f
LO
= 2.5GHz; baseband output
signal frequency = 100kHz, f
REF
= 40MHz, ENABLE = TXRX =
CS
= high, SCLK = DIN = low, with power matching for the differential
RF pins using the
Typical Operating Circuit
and registers set to default settings. Lowpass filter is set to 10MHz RF channel BW.
Unmodulated single-tone RF input signal is used.) (Note 2)
PARAMETER
CONDITIONS
AGC set for -65dBm wanted signal, max RF gain
(B7:B6 = 00)
AGC set for -55dBm wanted signal, max RF gain - 8dB
(B7:B6 = 01)
Out-of-Band Input IP3 (Note 4)
AGC set for -40dBm wanted signal, max RF gain - 16dB
(B7:B6 = 10)
AGC set for -30dBm wanted signal, max RF gain - 32dB
(B7:B6 = 11)
Max RF gain (B7:B6 = 00)
Inband Input P-1dB
Max RF gain - 8dB (B7:B6 = 01)
Max RF gain - 16dB (B7:B6 = 01)
Max RF gain - 32dB (B7:B6 = 11)
Maximum Output Signal Level
I/Q Gain Imbalance
I/Q Phase Error
Rx I/Q Output Load Impedance
(R || C)
Loopback Gain (for Receiver I/Q
Calibration)
Over passband frequency range at VGA gain between
max and max - 54dB; 1dB compression point
100kHz IQ baseband output; 1
σ
variation
100kHz IQ baseband output; 1
σ
variation
Minimum differential resistance
Maximum differential capacitance
Transmitter I/Q input to receiver I/Q output; transmitter
B6:B1 = 000011, receiver B5:B0 = 101010 programmed
through SPI
After switching RXHP to 0; average over 1µs after any
gain change, or 2µs after receive enabled with 100Hz
AC-coupling
No RF input signal; measure at 3µs after receive enable;
RXHP = 1 for 0 to 2µs and set to 0 after 2µs, 1
σ
variation
Any RF gain settings
-6
-1
10
5
+4.5
-7
+16
-37
-29
-21
-4
1.15
0.05
0.25
V
P-P
dB
Degrees
kΩ
pF
dB
dBm
MIN
TYP
-13
-9
dBm
MAX
UNITS
I/Q Output DC Droop
1
V/s
I/Q Static DC Offset
Isolation Between Rx Channels A
and B
RECEIVER BASEBAND FILTERS
1
40
mV
dB
At 15MHz
Baseband Filter Rejection
At 20MHz
At > 40MHz
RXHP = 1 (used before AGC completion)
D[5:4] = 00
Baseband Highpass Filter Corner
Frequency
RXHP = 0 (used after AGC
completion) address A[4:0] = 01110
D[5:4] = 01
D[5:4] = 10
D[5:4] = 11
57
75
75
650
0.1
1
30
100
kHz
dB
4
_______________________________________________________________________________________
2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(MAX2839AS Evaluation Kit. Unless otherwise noted, V
CC_
= 2.8V, T
A
= +25°C, f
RF
= 2.4999GHz, f
LO
= 2.5GHz; baseband output
signal frequency = 100kHz, f
REF
= 40MHz, ENABLE = TXRX =
CS
= high, SCLK = DIN = low, with power matching for the differential
RF pins using the
Typical Operating Circuit
and registers set to default settings. Lowpass filter is set to 10MHz RF channel BW.
Unmodulated single-tone RF input signal is used.) (Note 2)
PARAMETER
CONDITIONS
A[4:0] = 00100 serial bits D[9:6] = 0000
A[4:0] = 00100 serial bits D[9:6] = 0001
A[4:0] = 00100 serial bits D[9:6] = 0010
A[4:0] = 00100 serial bits D[9:6] = 0011
A[4:0] = 00100 serial bits D[9:6] = 0100
A[4:0] = 00100 serial bits D[9:6] = 0101
A[4:0] = 00100 serial bits D[9:6] = 0110
RF Channel BW Supported by
Baseband Filter
A[4:0] = 00100 serial bits D[9:6] = 0111
A[4:0] = 00100 serial bits D[9:6] = 1000
A[4:0] = 00100 serial bits D[9:6] = 1001
A[4:0] = 00100 serial bits D[9:6] = 1010
A[4:0] = 00100 serial bits D[9:6] = 1011
A[4:0] = 00100 serial bits D[9:6] = 1100
A[4:0] = 00100 serial bits D[9:6] = 1101
A[4:0] = 00100 serial bits D[9:6] = 1110
A[4:0] = 00100 serial bits D[9:6] = 1111
Baseband Gain Ripple
Baseband Group Delay Ripple
Baseband Filter Rejection for
5MHz RF Channel BW
Baseband Filter Rejection for
10MHz RF Channel BW
RSSI
RSSI Minimum Output Voltage
RSSI Maximum Output Voltage
RSSI Slope
RSSI Output Settling Time
To within 3dB of steady state
+32dB signal step
-32dB signal step
R
LOAD
≥
10kΩ
R
LOAD
≥
10kΩ
0.6
2.1
29
200
800
V
V
mV/dB
ns
0 to 2.3MHz for RF BW = 5MHz
0 to 4.6MHz for RF BW = 10MHz
0 to 2.3MHz for RF BW = 5MHz
0 to 4.6MHz for RF BW = 10MHz
At 2.3MHz
At > 8.75MHz
At 4.6MHz
At > 17.5MHz
MIN
TYP
1.75
2.25
3.5
5.0
5.5
6.0
7.0
8.0
9.0
10.0
12.0
14.0
15.0
20.0
24.0
28.0
1.3
1.3
90
50
1.8
75
1.6
75
dB
P-P
ns
P-P
dB
dB
MHz
MAX
UNITS
MAX2839AS
_______________________________________________________________________________________
5
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