19-5121; Rev 1; 3/10
TION KIT
EVALUA BLE
AVAILA
5GHz, 5-Channel MIMO Receiver
Features
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General Description
The MAX2851 is a single-chip, 5-channel RF receiver IC
designed for 5GHz wireless HDMI™ applications. The
IC includes all circuitry required to implement the com-
plete 5-channel MIMO RF receiver function and crystal
oscillator, providing a fully integrated receive path, VCO,
frequency synthesis, and baseband/control interface. It
includes a fast-settling sigma-delta RF fractional synthe-
sizer with 76Hz frequency programming step size. The
IC also integrates on-chip I/Q amplitude and phase-error
calibration circuits. The receiver includes both an in-
channel RSSI and also an RF RSSI.
On-chip monolithic filters are included for receiver I/Q
baseband signal channel selection, for supporting both
20MHz and 40MHz RF channels. The baseband filter-
ing and Rx signal paths are optimized to meet stringent
WHDI requirements. The downconverter local oscillator
is coherent among all the receiver channels.
The reverse-link control channel uses an on-chip 5GHz
OFDM transmitter. It shares the RF synthesizer and LO
generation circuit with the MIMO receivers. Dynamic
on/off control of the external PA is implemented with
programmable precision voltage. An analog mux routes
external PA power-detect voltage to the RSSI pin.
The MIMO receiver chip is housed in a small 68-pin
TQFN leadless plastic package with exposed paddle.
MAX2851
Applications
5GHz Wireless HDMI (WHDI™)
5GHz FDD Backhaul and WiMAX™
5GHz MIMO Receiver Up to Five Spatial Streams
5GHz Beam Steering Receiver
IEEE 802.11a Transmitter
4900MHz to 5900MHz Frequency Range
Coherent LO Among Receivers
4.5dB Rx Noise Figure
70dB Rx Gain Control Range with 2dB Step Size,
Digitally Controlled
60dB Dynamic Range Receiver RSSI
RF Wideband Receiver RSSI
Programmable 20MHz/40MHz Rx I/Q Lowpass
Channel Filters
-5dBm Transmit Power (54Mbps OFDM)
31dB Tx Gain Control Range with 0.5dB Step Size,
Digitally Controlled
Tx/Rx I/Q Error and LO Leakage Detection and
Adjustment
Programmable 20MHz/40MHz Tx I/Q Lowpass
Anti-Aliasing Filter
Analog Mux for PA Power Detect
PA On/Off Control
Sigma-Delta Fractional-N PLL with 76Hz
Resolution
Monolithic Low-Noise VCO with -35dBc Integrated
Phase Noise
4-Wire SPIK Digital Interface
I/Q Analog Baseband Interface
Digital Tx/Rx Mode Control
On-Chip Digital Temperature Sensor Readout
Complete Baseband Interface
Digital Tx/Rx Mode Control
+2.7V to +3.6V Supply Voltage
Small 68-Pin TQFN Package (10mm x 10mm)
Ordering Information
PART
MAX2851ITK+
TEMP RANGE
-25NC to +85NC
PIN-PACKAGE
68 TQFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed paddle.
HDMI is a trademark of HDMI Licensing, LLC.
WHDI is a trademark of WHDI Special Interest Group.
WiMAX is a trademark of the WiMAX Forum.
SPI is a trademark of Motorola, Inc.
_______________________________________________________________
Maxim Integrated Products
1
Typical Operating Circuit appears at end of data sheet.
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.
5GHz, 5-Channel MIMO Receiver
MAX2851
ABSOLUTE MAXIMUM RATINGS
V
CC_
Pins to GND ................................................-0.3V to +3.9V
RF Inputs Max Current: RXRF1+, RXRF1-, RXRF2+,
RXRF2-, RXRF3+, RXRF3-, RXRF4+, RXRF4-,
RXRF5+, RXRF5- to GND ................................. -1mA to +1mA
RF Outputs: TXRF+, TXRF- to GND .....................-0.3V to +3.9V
Analog Inputs: TXBBI+, TXBBI-, TXBBQ+, TXBBQ-, PA_DET,
XTAL, XTAL_CAP to GND ..................................-0.3V to +3.9V
Analog Outputs: RXBBI1+, RXBBI1-, RXBBQ1+, RXBBQ1-,
RXBBI2+, RXBBI2-, RXBBQ2+, RXBBQ2-, RXBBI3+, RXBBI3-,
RXBBQ3+, RXBBQ3-, RXBBI4+, RXBBI4-, RXBBQ4+,
RXBBQ4-, RXBBI5+, RXBBI5-, RXBBQ5+, RXBBQ5-, RSSI,
CLKOUT2, BYP_VCO, CPOUT+, CPOUT-, PA_BIAS to
GND ...................................................................-0.3V to +3.9V
Digital Inputs: ENABLE,
CS,
SCLK,
DIN to GND ........................................................-0.3V to +3.9V
Digital Outputs: DOUT, CLKOUT to GND ............-0.3V to +3.9V
Short-Circuit Duration
Analog Outputs ................................................................. 10s
Digital Outputs................................................................... 10s
RF Input Power .............................................................. +10dBm
RF Output Differential Load VSWR ........................................ 6:1
Continuous Power Dissipation (T
A
= +85NC)
68-Pin TQFN (derate 29.4mW/NC above +70NC) .......2352mW
Operating Temperature Range .......................... -25NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +160NC
Lead Temperature (soldering, 10s) ................................+300NC
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
(Operating conditions unless otherwise specified: V
CC
= 2.7V to 3.6V, T
A
= -25NC to +85NC, ENABLE set according to operating
mode,
CS
= high, SCLK = DIN = low, transmitter in maximum gain. Power matching and termination for the differential RF output
pins using the
Typical Operating Circuit;
100mV
RMS
differential I and Q signals applied to I and Q baseband inputs of transmitters
in transmit mode. Typical values measured at V
CC
= 2.85V, T
A
= +25NC, LO freq = 5.35GHz. Channel bandwidth is set to 40MHz.
PA control pins open circuit, V
CC_PA_BIAS
is disconnected.) (Note 1)
PARAMETER
Supply Voltage
Shutdown mode
Clockout only mode
with load = 10pF at
CLKOUT pin
Supply Current
Standby mode
Transmit mode
Receive mode
Receive calibration
mode
Rx I/Q Output Common-Mode
Voltage
Tx Baseband Input Common-
Mode Voltage Operating Range
Tx Baseband Input Bias Current
Source current
One receiver is on
Five receivers are on
One receiver is on
Five receivers are on
T
A
= +25NC
XTAL oscillator, CLKOUT2 is off
XTAL oscillator, CLKOUT2 is on
TCXO input, CLKOUT2 is off
TCXO input, CLKOUT2 is on
CONDITIONS
MIN
2.7
10
3.7
4.6
4.8
6.1
60
183
144
367
248
435
256
0.88
0.5
10
1.1
1.34
1.1
20
V
V
FA
517
212
184
458
mA
7.0
TYP
MAX
3.6
UNITS
V
FA
Transmit calibration mode
2
______________________________________________________________________________________
5GHz, 5-Channel MIMO Receiver
DC ELECTRICAL CHARACTERISTICS (continued)
(Operating conditions unless otherwise specified: V
CC
= 2.7V to 3.6V, T
A
= -25NC to +85NC, ENABLE set according to operating
mode,
CS
= high, SCLK = DIN = low, transmitter in maximum gain. Power matching and termination for the differential RF output
pins using the
Typical Operating Circuit;
100mV
RMS
differential I and Q signals applied to I and Q baseband inputs of transmitters
in transmit mode. Typical values measured at V
CC
= 2.85V, T
A
= +25NC, LO freq = 5.35GHz. Channel bandwidth is set to 40MHz.
PA control pins open circuit, V
CC_PA_BIAS
is disconnected.) (Note 1)
PARAMETER
LOGIC INPUTS: ENABLE, SCLK, DIN,
CS
Digital Input-Voltage High, V
IH
Digital Input-Voltage Low, V
IL
Digital Input-Current High, I
IH
(Note 2)
-1
-1
V
CC
-
0.4
0.4
V
OL
V
CC
-
0.4
0.3
+1
+1
V
V
FA
FA
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2851
Digital Input-Current Low, I
IL
LOGIC OUTPUTS: DOUT, CLKOUT
Digital Output-Voltage High, V
OH
Sourcing 1mA
Digital Output-Voltage Low, V
OL
Digital Output Voltage in
Shutdown Mode
Sinking 1mA
Sinking 1mA
V
V
V
AC ELECTRICAL CHARACTERISTICS—Rx MODE
(Operating conditions unless otherwise specified: V
CC
= 2.7V to 3.6V, T
A
= -25NC to +85NC, RF freq = 5.351GHz, LO freq = 5.35GHz.
Reference freq = 40MHz, ENABLE = high,
CS
= high, SCLK = DIN = low, with power matching at RXRF_+ and RXRF_- differential
ports using the
Typical Operating Circuit.
Receiver I/Q output at 100mV
RMS
loaded with 10kI differential load resistance and 10pF
load capacitance. RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
CC
= 2.85V, T
A
= +25NC,
channel bandwidths of 40MHz.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RECEIVER SECTION: RF INPUT TO I/Q BASEBAND LOADED OUTPUT
Includes 50I to 100I RF Balun and Matching
RF Input Frequency Range
Peak-to-Peak Gain Variation
Over RF Frequency Range at
One Temperature
RF Input Return Loss
Total Voltage Gain
4.9GHz to 5.9GHz
All LNA settings
Maximum gain, Main address 1 D[7:0] = 11111111
Minimum gain, Main address 1 D[7:0] = 00000000
Main address 1 D[7:5] = 110
RF Gain Steps Relative to
Maximum Gain
Main address 1 D[7:5] = 101
Main address 1 D[7:5] = 001
Main address 1 D[7:5] = 000
Baseband Gain Range
Baseband Gain Step
RF Gain Change Settling Time
Gain settling to within
Q0.5dB
of steady state, RXHP = 1
From maximum baseband gain (Main address 1 D[3:0]
= 1111) to minimum baseband gain (Main address 1
D[3:0] = 0000)
28
61.8
4.9
1.8
-6
68
-2
-8
-16
-32
-40
30
2
400
32
dB
dB
ns
dB
+6.9
5.9
4.2
GHz
dB
dB
dB
_______________________________________________________________________________________
3
5GHz, 5-Channel MIMO Receiver
MAX2851
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(Operating conditions unless otherwise specified: V
CC
= 2.7V to 3.6V, T
A
= -25NC to +85NC, RF freq = 5.351GHz, LO freq = 5.35GHz.
Reference freq = 40MHz, ENABLE = high,
CS
= high, SCLK = DIN = low, with power matching at RXRF_+ and RXRF_- differential
ports using the
Typical Operating Circuit.
Receiver I/Q output at 100mV
RMS
loaded with 10kI differential load resistance and 10pF
load capacitance. RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
CC
= 2.85V, T
A
= +25NC,
channel bandwidths of 40MHz.) (Note 1)
PARAMETER
Baseband Gain Change Settling
Time
CONDITIONS
Gain settling to within
Q0.5dB
of steady state, RXHP = 1
Balun input referred,
integrated from 10kHz
to 9.5MHz at I/Q base-
band output for 20MHz
RF bandwidth
DSB Noise Figure
Balun input referred,
integrated from 10kHz
to 19MHz at I/Q base-
band output for 40MHz
RF bandwidth
Maximum RF gain (Main
address 1 D[7:5] = 111)
Maximum RF gain - 16dB
(Main address 1 D[7:5] =
101)
Maximum RF gain (Main
address 1 D[7:5] = 111)
Maximum RF gain - 16dB
(Main address 1 D[7:5] =
101)
-65dBm wanted signal, RF
gain = max (Main address 1
D[7:0] = 11101001)
-49dBm wanted signal, RF
gain = max - 16dB (Main
address 1 D[7:0] = 10101001)
-45dBm wanted signal, RF
gain = max - 32dB (Main
address 1 D[7:0] = 00111111)
-65dBm wanted signal, RF
gain = max (Main address 1
D[7:0] = 11101001)
-49dBm wanted signal, RF
gain = max - 16dB (Main
address 1 D[7:0] = 10101001)
-45dBm wanted signal, RF
gain = max - 32dB (Main
address 1 D[7:0] = 00101001)
MIN
TYP
200
4.5
MAX
UNITS
ns
15
dB
4.5
15
-13
20MHz RF channel,
two-tone jammers at
+25MHz and +48MHz
frequency offset with
-39dBm/tone
-5
11
dBm
-13
Out-of-Band Input IP3
40MHz RF channel,
two-tone jammers at
+50MHz and +96MHz
frequency offset with
-39dBm/tone
-5
11
1dB Gain Desensitization by
Alternate Channel Blocker
Blocker at
Q40MHz
offset frequency for 20MHz RF
channel
Blocker at
Q80MHz
offset frequency for 40MHz RF
channel
Max RF gain (Main address 1 D[7:5] = 111)
Max RF gain - 8dB (Main address 1 D[7:5] = 110)
Max RF gain - 16dB (Main address 1 D[7:5] = 101)
Max RF gain - 32dB (Main address 1 D[7:5] = 001)
-24
dBm
-24
-34
-25
-18
-1
dBm
Input 1dB Gain Compression
4
______________________________________________________________________________________
5GHz, 5-Channel MIMO Receiver
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(Operating conditions unless otherwise specified: V
CC
= 2.7V to 3.6V, T
A
= -25NC to +85NC, RF freq = 5.351GHz, LO freq = 5.35GHz.
Reference freq = 40MHz, ENABLE = high,
CS
= high, SCLK = DIN = low, with power matching at RXRF_+ and RXRF_- differential
ports using the
Typical Operating Circuit.
Receiver I/Q output at 100mV
RMS
loaded with 10kI differential load resistance and 10pF
load capacitance. RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
CC
= 2.85V, T
A
= +25NC,
channel bandwidths of 40MHz.) (Note 1)
PARAMETER
Output 1dB Gain Compression
Baseband -3dB Lowpass Corner
Frequency
Baseband Filter Stopband
Rejection
Baseband -3dB Highpass
Corner Frequency
CONDITIONS
Over passband frequency range, at any gain setting,
1dB compression point
Main address 0 D1 = 0
Main address 0 D1 = 1
Rejection at 30MHz offset frequency for 20MHz channel
Rejection at 60MHz offset frequency for 40MHz channel
Main address 5 D1 = 1
Main address 5 D1 = 0, Main address 4 D3 = 1
Main address 5 D1 = 0, Main address 4 D3 = 0 (Note 3)
MIN
TYP
0.63
9.5
19
74
69
600
10
0.1
kHz
MAX
UNITS
V
P-P
MHz
dB
MAX2851
50Fs after enabling receive mode and togging RXHP
Steady-State I/Q Output DC Error from 1 to 0, averaged over many measurements if I/Q
with AC-Coupling
noise voltage exceeds 1mV
RMS
, at any given gain set-
ting, no input signal, 1-sigma value
I/Q Gain Imbalance
I/Q Phase Imbalance
Sideband Suppression
Receiver Spurious Signal
Emissions
RF RSSI Output Voltage
Baseband RSSI Slope
Baseband RSSI Maximum
Output Voltage
Baseband RSSI Minimum Output
Voltage
RF Loopback Conversion Gain
Tx VGA gain at max (Main address 9 D[9:4] = 111111), Rx
VGA gain at max - 24dB (Main address 1 D[3:0] = 0101)
-17.1
1MHz baseband output, 1-sigma value
1MHz baseband output, 1-sigma value
1MHz baseband output
LO frequency
2O LO frequency
3O LO frequency
4O LO frequency
-25dBm input power
18
2
mV
0.1
0.2
40
-75
-62
-75
-54
1.6
26.5
2.3
0.5
-10
-1.7
37
dB
deg
dB
dBm/
MHz
V
mV/dB
V
V
dB
_______________________________________________________________________________________
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