19-5001; Rev 1; 5/10
TION KIT
EVALUA BLE
AVAILA
3.3GHz to 3.9GHz MIMO Wireless
Broadband RF Transceiver
Features
S
3.3GHz to 3.9GHz Operation
S
Complete RF Transceiver with PA Driver
General Description
The MAX2842 single-chip, direct-conversion, zero-IF
RF transceiver IC is designed for 3GHz NLOS wireless
broadband MIMO systems. It has two transmitters and
two receivers, with differential 100I RF inputs and out-
puts. The IC includes all circuitry required to implement
the complete RF transceiver function, providing fully
integrated receive paths, transmit path, VCO and tank,
frequency synthesis, and baseband/control interface. It
includes a fast-settling sigma-delta RF fractional synthe-
sizer with ~25Hz frequency step size. The IC also inte-
grates an on-chip AM detector for measuring transmitter
I/Q imbalance and LO leakage. An internal transmit-to-
receive loopback mode allows for receiver I/Q imbalance
calibration. The IC supports full duplex mode of opera-
tion for external loopback.
The MAX2842 completely eliminates the need for exter-
nal SAW filters by implementing on-chip programmable
monolithic filters for both receiver and transmitter, for
channel bandwidths from 3.5MHz to 10MHz. The base-
band filtering Rx and Tx signal paths are optimized to
meet stringent noise figure and linearity requirements.
The transceiver is housed in a small 56-pin TQFN, 7mm
x 7mm, leadless plastic package with exposed paddle.
MAX2842
Applications
3GHz 16d and 16e MIMO WiMAX
0dBm Linear OFDMA Transmit Power, 64-QAM,
-65dB Relative Spectral Emission Mask
3.8dB Receiver Noise Figure
Automatic On-Chip Receiver I/Q DC Cancellation
On-Chip Tx I/Q Gain/Phase Error and LO
Leakage Detection
Monolithic Low-Noise VCO with -38dBc
Integrated Phase Noise
Fully Integrated Programmable I/Q Lowpass
Rx Channel Filters for 3.5MHz, 5MHz, 7MHz,
and 10MHz Channels
Programmable Tx I/Q Lowpass Reconstruction
Filters
Fractional PLL with 50µs Channel Hopping
Time (Settling to 50Hz)
4-Wire Bidirectional SPI™ Interface
60dB Transmit Power Control Range, Digitally
Controlled by SPI
71dB Receive Gain Control Range, Digitally
Controlled by SPI
RSSI with 60dB Dynamic Range
Digital Control for Tx, Rx, Shutdown, and
Standby Modes
On-Chip Crystal Oscillator with Digital Tuning
Programable Logic Interface Voltages
Both Automatic and Modem-Assisted Receiver
I/Q DC Offset Correction
S
Single +2.7V to +3.6V Supply
S
Low Shutdown Mode Current
S
Small 56-Pin TQFN Package (7mm x 7mm)
Ordering Information
PART
MAX2842ETN+T
TEMP RANGE
-40NC to +85NC
PIN-PACKAGE
56 TQFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
*EP
= Exposed pad.
Typical Operating Circuit appears at end of data sheet.
SPI is a trademark of Motorola, Inc.
_______________________________________________________________
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.
3.3GHz to 3.9GHz MIMO Wireless
Broadband RF Transceiver
MAX2842
ABSOLUTE MAXIMUM RATINGS
V
CC_
Pins to GND ................................................-0.3V to +3.9V
RF Inputs: Maximum Current at RXINA+,
RXINA-, RXINB+, RXINB- ................................ -1mA to +1mA
RF Outputs: TXOUTA+, TXOUTA-, TXOUTB+,
TXOUTB- to GND ..............................................-0.3V to +3.9V
Analog Inputs: TXBBIA+, TXBBIA-,
TXBBQA+, TXBBQA-, TXBBIB+, TXBBIB-,
TXBBQB+, TXBBQB-, REF_DIG to GND ..........-0.3V to +3.9V
Analog Input: XTAL1, REF_OSC .....................AC-Coupled Only
Analog Outputs: Maximum Current at
RXBBIA+, RXBBIA-, RXBBQA+, RXBBQA-,
RXBBIB+, RXBBIB-, RXBBQB+,
RXBBQB-, CPOUT+, CPOUT- ......................... -1mA to +1mA
Analog Outputs: Maximum Current at
PABIAS_A, PABIAS_B.............................. -100mA to +100mA
Digital Inputs: TXRX,
CS,
SCLK, DIN,
ENABLE, CLKOUTEN to GND ..........................-0.3V to +3.9V
Digital Outputs: DOUT, CLKOUT .........................-0.3V to +3.9V
Bias Voltages: BYP_VCO .....................................-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
= +85NC)
56-Pin TQFN (derate 27.8mW/NC above +70NC) .....< 2222mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +160NC
Lead Temperature (soldering, 10s) ................................+260NC
Soldering Temperature (reflow) ......................................+260NC
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 TABLE
(MAX2842 Evaluation Kit, V
CC_
= 2.7V to 3.6V, T
A
= -40NC to +85NC, Rx set to the maximum gain. ENABLE and TXRX are set accord-
ing to operating mode,
CS
= high, SCLK = DIN = low, no input signal at RF inputs, all RF inputs and outputs terminated into 50I,
receiver baseband outputs are open. 90mV
RMS
differential I and Q signals (1MHz) applied to I and 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 V
CC_
= 2.8V, f
LO
= 3.6GHz, and T
A
= +25NC, unless otherwise noted. LOGIC_VREF = V
CC_
.) (Note 1)
PARAMETER
Supply Voltage, V
CC
Shutdown mode
Shutdown mode with 44.8MHz reference clock output
Shutdown mode with crystal oscillator enabled and
44.8MHz reference clock output
Standby mode
Supply Current
Rx mode
Tx mode
Receiver loopback I/Q
calibration
Transmitter calibration
with AM detector
Rx I/Q Output Common-Mode
Voltage
One receiver on
Both receivers on
One transmitter on
Both transmitters on
One receiver on
Both receivers on
One transmitter on
Both transmitters on
0.77
CONDITIONS
MIN
2.7
TYP
10
1.9
2.9
35
77
115
152
246
125
154
119
181
1.0
1.1
1.2
1.3
1.32
V
3.6
5.0
50
96
142
190
320
155
190
148
230
mA
MAX
3.6
UNITS
V
FA
D5:D4 = 00 in Local address 8
D5:D4 = 01 in Local address 8
D5:D4 = 10 in Local address 8
D5:D4 = 11 in Local address 8
2
______________________________________________________________________________________
3.3GHz to 3.9GHz MIMO Wireless
Broadband RF Transceiver
DC ELECTRICAL CHARACTERISTICS TABLE (continued)
(MAX2842 Evaluation Kit, V
CC_
= 2.7V to 3.6V, T
A
= -40NC to +85NC, Rx set to the maximum gain. ENABLE and TXRX are set accord-
ing to operating mode,
CS
= high, SCLK = DIN = low, no input signal at RF inputs, all RF inputs and outputs terminated into 50I,
receiver baseband outputs are open. 90mV
RMS
differential I and Q signals (1MHz) applied to I and 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 V
CC_
= 2.8V, f
LO
= 3.6GHz, and T
A
= +25NC, unless otherwise noted. LOGIC_VREF = V
CC_
.) (Note 1)
PARAMETER
CONDITIONS
MIN
0.5
10
V
CC
-
0.4V
0.4
-1
-1
V
CC
-
0.4V
0.4
V
OL
V
OL
+1
+1
TYP
MAX
1.2
25
UNITS
V
FA
Tx Baseband Input Common-Mode To achieve at least
+4dBm
Tx output P - 1dB with
Voltage Operating Range
maximum -3dB gain setting
Tx Baseband Input Bias Current
Source current
LOGIC INPUTS: TXRX, ENABLE, SCLK, DIN,
CS,
CLKOUTEN
Digital Input-Voltage High, V
IH
Digital Input-Voltage Low, V
IL
Digital Input-Current High, I
IH
Digital Input-Current Low, I
IL
LOGIC OUTPUTS: DOUT, CLKOUT
Digital Output-Voltage High, V
OH
Digital Output-Voltage Low, V
OL
DOUT Voltage in Shutdown Mode
or Disabled Mode
CLKOUT Voltage When Disabled
Sourcing 100FA
Sinking 100FA
D7:D5 = 000 in Main address 22
V
V
FA
FA
MAX2842
V
V
V
V
AC ELECTRICAL CHARACTERISTICS TABLE—Rx Mode
(MAX2842 Evaluation Kit, V
CC_
= 2.7V to 3.6V, T
A
= +25NC, f
RF
= 3.601GHz, f
LO
= 3.6GHz, baseband output signal frequency =
1MHz, receiver baseband I/Q output at 90mV
RMS,
REF_OSC frequency = 44.8MHz, ENABLE = TXRX =
CS
= high, SCLK = DIN
= low. Lowpass filter is set to 10MHz RF channel BW, with power matching for the differential RF pins using the
Typical Operating
Circuit.
RXBB_ pins are loaded with differential 10kI resistor and 10pF capacitance in parallel. Registers set to default settings and
corresponding test mode, unless otherwise noted. Unmodulated single-tone RF input signal is used with specifications that normally
apply over the entire operating conditions, unless otherwise indicated.) (Note 1)
PARAMETER
RF Input Frequency Range
Peak-to-Peak Gain Variation Over Tested at band edges and band center; at one tempera-
RF Input Frequency Range
ture
S11 of RF Input Port
All RF gains
Maximum gain; D7:D0 = 11111000
in Main address 2 for Rx1, in Main
address 3 for Rx2
Minimum gain; D7:D0 = 00000111
in Main address 2 for Rx1, in Main
address 3 for Rx2
70
CONDITIONS
MIN
3.3
3
-10
77
dB
6
14
TYP
MAX
3.9
UNITS
GHz
dB
dB
RECEIVER SYSTEM: RF INPUT TO I/Q BASEBAND LOADED OUTPUT
Total Voltage Gain
T
A
= -40NC to
+85NC
_______________________________________________________________________________________
3
3.3GHz to 3.9GHz MIMO Wireless
Broadband RF Transceiver
MAX2842
AC ELECTRICAL CHARACTERISTICS TABLE—Rx Mode (continued)
(MAX2842 Evaluation Kit, V
CC_
= 2.7V to 3.6V, T
A
= +25NC, f
RF
= 3.601GHz, f
LO
= 3.6GHz, baseband output signal frequency =
1MHz, receiver baseband I/Q output at 90mV
RMS,
REF_OSC frequency = 44.8MHz, ENABLE = TXRX =
CS
= high, SCLK = DIN
= low. Lowpass filter is set to 10MHz RF channel BW, with power matching for the differential RF pins using the
Typical Operating
Circuit.
RXBB_ pins are loaded with differential 10kI resistor and 10pF capacitance in parallel. Registers set to default settings and
corresponding test mode, unless otherwise noted. Unmodulated single-tone RF input signal is used with specifications that normally
apply over the entire operating conditions, unless otherwise indicated.) (Note 1)
PARAMETER
CONDITIONS
From maximum RF gain to maximum RF gain - 8dB (D2:0
= 001 in Main address 2 for Rx1, in Main address 3 for
Rx2)
From maximum RF gain to maximum RF gain - 16dB
(D2:0 = 010 in Main address 2 for Rx1, in Main address
3 for Rx2)
RF Gain Steps
From maximum RF gain to maximum RF gain - 24dB
(D2:0 = 011 in Main address 2 for Rx1, in Main address
3 for Rx2)
From maximum RF gain to maximum RF gain - 32dB
(D2:0 = 110 in Main address 2 for Rx1, in Main address
3 for Rx2)
From maximum RF gain to maximum RF gain - 40dB
(D2:0 = 111 in Main address 2 for Rx1, in Main address
3 for Rx2)
Any RF or baseband gain change; signal amplitude set-
tling to
Q0.5dB
of steady state, excludes I/Q path DC
offset settling
Any RF or baseband gain change; signal amplitude set-
tling to
Q0.1dB
of steady state, excludes I/Q path DC
offset settling
From maximum baseband gain (D7:D3 = 00000 in Main
address 2 for Rx1, in Main address 3 for Rx2) to mini-
mum gain (D7:D3 = 11111 in Main address 2 for Rx1, in
Main address 3 for Rx2)
MIN
TYP
8
MAX
UNITS
16
24
dB
32
40
300
ns
500
Gain Change Settling Time
Baseband Gain Range
28
31
34
dB
Baseband Gain Step Size
1
dB
4
______________________________________________________________________________________
3.3GHz to 3.9GHz MIMO Wireless
Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS TABLE—Rx Mode (continued)
(MAX2842 Evaluation Kit, V
CC_
= 2.7V to 3.6V, T
A
= +25NC, f
RF
= 3.601GHz, f
LO
= 3.6GHz, baseband output signal frequency =
1MHz, receiver baseband I/Q output at 90mV
RMS,
REF_OSC frequency = 44.8MHz, ENABLE = TXRX =
CS
= high, SCLK = DIN
= low. Lowpass filter is set to 10MHz RF channel BW, with power matching for the differential RF pins using the
Typical Operating
Circuit.
RXBB_ pins are loaded with differential 10kI resistor and 10pF capacitance in parallel. Registers set to default settings and
corresponding test mode, unless otherwise noted. Unmodulated single-tone RF input signal is used with specifications that normally
apply over the entire operating conditions, unless otherwise indicated.) (Note 1)
PARAMETER
CONDITIONS
Voltage gain
R
65dB with maximum
RF gain (D7:0 = 10111000 in Main
address 2 for Rx1, in Main address 3
for Rx2)
Voltage gain = 50dB with maximum
RF gain - 8dB (D7:0 = 10000001
in Main address 2 for Rx1, in Main
address 3 for Rx2)
Voltage gain = 45dB with maximum
RF gain - 16dB (D7:0 = 10011010
in Main address 2 for Rx1, in Main
address 3 for Rx2)
Voltage gain = 15dB with maximum
RF gain - 32dB (D7:0 = 00101110
in Main address 2 for Rx1, in Main
address 3 for Rx2)
AGC set for -65dBm wanted signal,
maximum RF gain (D7:0 = xxxxx000
in Main address 2 for Rx1, in Main
address 3 for Rx2)
AGC set for -55dBm wanted signal,
maximum RF gain - 8dB (D7:0 =
xxxxx001 in Main address 2 for Rx1,
in Main address 3 for Rx2)
MIN
TYP
MAX
UNITS
MAX2842
3.8
7.1
dB
13.3
DSB Noise Figure
Balun input
referred
28.2
-15
Out-of-Band Input IP3
Two tones at
+20MHz and
+39MHz offsets,
at -35dBm each; AGC set for -40dBm wanted signal,
measure IM3 at maximum RF gain - 16dB (D7:0 =
1MHz
xxxxx010 in Main address 2 for Rx1,
in Main address 3 for Rx2)
AGC set for -30dBm wanted signal,
maximum RF gain - 32dB (D7:0 =
xxxxx110 in Main address 2 for Rx1,
in Main address 3 for Rx2)
-9
dBm
-6
0
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