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MAX2851 5GHz, 5-Channel MIMO Receiver
General Description Features
The MAX2851 is a single-chip, 5-channel RF receiver IC 5GHz, 5x MIMO Downlink Receivers, Single-Uplink
designed for 5GHz wireless HDMI applications. The IEEE 802.11a Transmitter
IC includes all circuitry required to implement the com-
4900MHz to 5900MHz Frequency Range
plete 5-channel MIMO RF receiver function and crystal
Coherent LO Among Receivers
oscillator, providing a fully integrated receive path, VCO,
4.5dB Rx Noise Figure
frequency synthesis, and baseband/control interface. It
includes a fast-settling sigma-delta RF fractional synthe-
70dB Rx Gain Control Range with 2dB Step Size,
sizer with 76Hz frequency programming step size. The
Digitally Controlled
IC also integrates on-chip I/Q amplitude and phase-error
60dB Dynamic Range Receiver RSSI
calibration circuits. The receiver includes both an in-
RF Wideband Receiver RSSI
channel RSSI and also an RF RSSI.
Programmable 20MHz/40MHz Rx I/Q Lowpass
On-chip monolithic filters are included for receiver I/Q
Channel Filters
baseband signal channel selection, for supporting both
20MHz and 40MHz RF channels. The baseband filtering
-5dBm Transmit Power (54Mbps OFDM)
and Rx signal paths are optimized to meet stringent WHDI
31dB Tx Gain Control Range with 0.5dB Step Size,
requirements. The downconverter local oscillator is coher-
Digitally Controlled
ent among all the receiver channels.
Tx/Rx I/Q Error and LO Leakage Detection and
The reverse-link control channel uses an on-chip 5GHz
Adjustment
OFDM transmitter. It shares the RF synthesizer and LO
Programmable 20MHz/40MHz Tx I/Q Lowpass
generation circuit with the MIMO receivers. Dynamic
Anti-Aliasing Filter
on/off control of the external PA is implemented with
programmable precision voltage. An analog mux routes
Analog Mux for PA Power Detect
external PA power-detect voltage to the RSSI pin.
PA On/Off Control
The MIMO receiver chip is housed in a small 68-pin TQFN
Sigma-Delta Fractional-N PLL with 76Hz Resolution
leadless plastic package with exposed paddle.
Monolithic Low-Noise VCO with -35dBc Integrated
Phase Noise
Applications
4-Wire SPI Digital Interface
5GHz Wireless HDMI (WHDI)
5GHz FDD Backhaul and WiMAX
I/Q Analog Baseband Interface
5GHz MIMO Receiver Up to Five Spatial Streams
Digital Tx/Rx Mode Control
5GHz Beam Steering Receiver
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 TEMP RANGE PIN-PACKAGE
HDMI is a trademark of HDMI Licensing, LLC.
MAX2851ITK+ -25C to +85C 68 TQFN-EP*
WHDI is a trademark of WHDI Special Interest Group.
+Denotes a lead(Pb)-free/RoHS-compliant package.
WiMAX is a trademark of the WiMAX Forum.
*EP = Exposed paddle.
Typical Operating Circuit appears at end of data sheet.
19-5121; Rev 1; 3/10MAX2851 5GHz, 5-Channel MIMO Receiver
Absolute Maximum Ratings
V Pins to GND ...............................................-0.3V to +3.9V
Digital Inputs: ENABLE, CS, SCLK,
CC_
RF Inputs Max Current: RXRF1+, RXRF1-, RXRF2+,
DIN to GND ......................................................-0.3V to +3.9V
RXRF2-, RXRF3+, RXRF3-, RXRF4+, RXRF4-,
Digital Outputs: DOUT, CLKOUT to GND ............-0.3V to +3.9V
RXRF5+, RXRF5- to GND................................ -1mA to +1mA
Short-Circuit Duration
RF Outputs: TXRF+, TXRF- to GND ....................-0.3V to +3.9V
Analog Outputs .................................................................. 10s
Analog Inputs: TXBBI+, TXBBI-, TXBBQ+, TXBBQ-, PA_DET,
Digital Outputs ................................................................... 10s
XTAL, XTAL_CAP to GND ................................-0.3V to +3.9V
RF Input Power ..............................................................+10dBm
Analog Outputs: RXBBI1+, RXBBI1-, RXBBQ1+, RXBBQ1-,
RF Output Differential Load VSWR ........................................6:1
RXBBI2+, RXBBI2-, RXBBQ2+, RXBBQ2-, RXBBI3+,
Continuous Power Dissipation (T = +85C)
A
RXBBI3-, RXBBQ3+, RXBBQ3-, RXBBI4+, RXBBI4-,
68-Pin TQFN (derate 29.4mW/C above +70C) ......2352mW
RXBBQ4+, RXBBQ4-, RXBBI5+, RXBBI5-, RXBBQ5+,
Operating Temperature Range ........................... -25C to +85C
RXBBQ5-, RSSI, CLKOUT2, BYP_VCO, CPOUT+, CPOUT-,
Junction Temperature ......................................................+150C
PA_BIAS to GND ..............................................-0.3V to +3.9V
Storage Temperature Range ............................ -65C to +160C
Lead Temperature (soldering, 10s) .................................+300C
Soldering Temperature (reflow) .......................................+260C
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 = 2.7V to 3.6V, T = -25C to +85C, ENABLE set according to operating mode,
CC A
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 differential I and Q signals applied to I and Q baseband inputs of transmitters in transmit
RMS
mode. Typical values measured at V = 2.85V, T = +25C, LO freq = 5.35GHz. Channel bandwidth is set to 40MHz. PA control pins
CC A
open circuit, V is disconnected.) (Note 1)
CC_PA_BIAS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage 2.7 3.6 V
Shutdown mode T = +25C 10 A
A
XTAL oscillator, CLKOUT2 is off 3.7
Clockout only mode
XTAL oscillator, CLKOUT2 is on 4.6
with load = 10pF at
TCXO input, CLKOUT2 is off 4.8 7.0
CLKOUT pin
TCXO input, CLKOUT2 is on 6.1
Standby mode 60
Supply Current
Transmit mode 183 212 mA
One receiver is on 144 184
Receive mode
Five receivers are on 367 458
One receiver is on 248
Receive calibration
mode
Five receivers are on 435 517
Transmit calibration mode 256
Rx I/Q Output Common-Mode
0.88 1.1 1.34 V
Voltage
Tx Baseband Input Common-
0.5 1.1 V
Mode Voltage Operating Range
Tx Baseband Input Bias Current Source current 10 20 A
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