MAXIM MAX2851 Technical data

19-5121; Rev 1; 3/10

EVALUATION KIT

AVAILABLE

5GHz, 5-Channel MIMO Receiver

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 com­plete 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 synthe­sizer 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 in­channel 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 filter­ing 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.

Applications

5GHz Wireless HDMI (WHDI™)

5GHz FDD Backhaul and WiMAX™

5GHz MIMO Receiver Up to Five Spatial Streams

5GHz Beam Steering Receiver

Features

S 5GHz, 5x MIMO Downlink Receivers, Single-Uplink

IEEE 802.11a Transmitter

S 4900MHz to 5900MHz Frequency Range
S Coherent LO Among Receivers
S 4.5dB Rx Noise Figure
S 70dB Rx Gain Control Range with 2dB Step Size,

Digitally Controlled

S 60dB Dynamic Range Receiver RSSI
S RF Wideband Receiver RSSI
S Programmable 20MHz/40MHz Rx I/Q Lowpass

Channel Filters

S -5dBm Transmit Power (54Mbps OFDM)
S 31dB Tx Gain Control Range with 0.5dB Step Size,

Digitally Controlled

S Tx/Rx I/Q Error and LO Leakage Detection and

Adjustment

S Programmable 20MHz/40MHz Tx I/Q Lowpass

Anti-Aliasing Filter

S Analog Mux for PA Power Detect
S PA On/Off Control
S Sigma-Delta Fractional-N PLL with 76Hz

Resolution

S Monolithic Low-Noise VCO with -35dBc Integrated

Phase Noise

S 4-Wire SPIK
S I/Q Analog Baseband Interface
S Digital Tx/Rx Mode Control
S On-Chip Digital Temperature Sensor Readout
S Complete Baseband Interface
S Digital Tx/Rx Mode Control
S +2.7V to +3.6V Supply Voltage
S Small 68-Pin TQFN Package (10mm x 10mm)

Digital Interface

MAX2851

Ordering Information

PART TEMP RANGE PIN-PACKAGE

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

MAX2851ITK+

+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed paddle.

Typical Operating Circuit appears at end of data sheet.

-25NC to +85NC

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.

68 TQFN-EP*

5GHz, 5-Channel MIMO Receiver

ABSOLUTE MAXIMUM RATINGS

V

Pins to GND ................................................-0.3V to +3.9V

CC_

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-,

MAX2851

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

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
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
in transmit mode. Typical values measured at V
PA control pins open circuit, V

PARAMETER CONDITIONS MIN TYP MAX UNITS

Supply Voltage 2.7 3.6 V

Supply Current

Rx I/Q Output Common-Mode
Voltage

Tx Baseband Input Common­Mode Voltage Operating Range

Tx Baseband Input Bias Current Source current 10 20

CC_PA_BIAS

Shutdown mode

Clockout only mode
with load = 10pF at
CLKOUT pin

Standby mode 60
Transmit mode 183 212

Receive mode

Receive calibration
mode

Transmit calibration mode 256

CC

is disconnected.) (Note 1)

= 2.7V to 3.6V, T

CC

differential I and Q signals applied to I and Q baseband inputs of transmitters

RMS

= 2.85V, TA = +25NC, LO freq = 5.35GHz. Channel bandwidth is set to 40MHz.

T

A

XTAL oscillator, CLKOUT2 is off 3.7
XTAL oscillator, CLKOUT2 is on 4.6
TCXO input, CLKOUT2 is off 4.8 7.0
TCXO input, CLKOUT2 is on 6.1

One receiver is on 144 184
Five receivers are on 367 458
One receiver is on 248
Five receivers are on 435 517

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

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

= -25NC to +85NC, ENABLE set according to operating

A

= +25NC

= +85NC)

A

10

0.88 1.1 1.34 V

0.5 1.1 V

FA

mA

FA

2 ______________________________________________________________________________________

5GHz, 5-Channel MIMO Receiver

DC ELECTRICAL CHARACTERISTICS (continued)

(Operating conditions unless otherwise specified: V
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
in transmit mode. Typical values measured at V
PA control pins open circuit, V

PARAMETER CONDITIONS MIN TYP MAX UNITS

LOGIC INPUTS: ENABLE, SCLK, DIN, CS

Digital Input-Voltage High, V

Digital Input-Voltage Low, V
Digital Input-Current High, I
Digital Input-Current Low, I

LOGIC OUTPUTS: DOUT, CLKOUT

Digital Output-Voltage High, V

Digital Output-Voltage Low, V

Digital Output Voltage in
Shutdown Mode

CC_PA_BIAS

IH

IL

IH

IL

OH

OL

(Note 2) 0.3 V

Sourcing 1mA

Sinking 1mA 0.4 V

Sinking 1mA V

CC

is disconnected.) (Note 1)

= 2.7V to 3.6V, T

CC

differential I and Q signals applied to I and Q baseband inputs of transmitters

RMS

= 2.85V, TA = +25NC, LO freq = 5.35GHz. Channel bandwidth is set to 40MHz.

= -25NC to +85NC, ENABLE set according to operating

A

VCC -

0.4

-1 +1

-1 +1

-

V

CC

0.4

OL

V

FA
FA

V

V

MAX2851

AC ELECTRICAL CHARACTERISTICS—Rx MODE

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -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
load capacitance. RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
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 4.9 5.9 GHz

Peak-to-Peak Gain Variation
Over RF Frequency Range at
One Temperature

RF Input Return Loss All LNA settings -6 dB

Total Voltage Gain

RF Gain Steps Relative to
Maximum Gain

Baseband Gain Range

Baseband Gain Step 2 dB
RF Gain Change Settling Time

4.9GHz to 5.9GHz 1.8 4.2 dB

Maximum gain, Main address 1 D[7:0] = 11111111 61.8 68
Minimum gain, Main address 1 D[7:0] = 00000000 -2 +6.9
Main address 1 D[7:5] = 110 -8
Main address 1 D[7:5] = 101 -16
Main address 1 D[7:5] = 001 -32
Main address 1 D[7:5] = 000 -40

From maximum baseband gain (Main address 1 D[3:0]
= 1111) to minimum baseband gain (Main address 1
D[3:0] = 0000)

Gain settling to within Q0.5dB of steady state, RXHP = 1

loaded with 10kI differential load resistance and 10pF

RMS

= 2.85V, TA = +25NC,

CC

28 30 32 dB

400 ns

dB

dB

_______________________________________________________________________________________ 3

5GHz, 5-Channel MIMO Receiver

AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -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
load capacitance. RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
channel bandwidths of 40MHz.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Baseband Gain Change Settling

MAX2851

Time

DSB Noise Figure

Out-of-Band Input IP3

1dB Gain Desensitization by
Alternate Channel Blocker

Input 1dB Gain Compression

Gain settling to within Q0.5dB of steady state, RXHP = 1

Balun input referred,
integrated from 10kHz
to 9.5MHz at I/Q base­band output for 20MHz
RF bandwidth

Balun input referred,
integrated from 10kHz
to 19MHz at I/Q base­band output for 40MHz
RF bandwidth

20MHz RF channel,
two-tone jammers at
+25MHz and +48MHz
frequency offset with

-39dBm/tone

40MHz RF channel,
two-tone jammers at
+50MHz and +96MHz
frequency offset with

-39dBm/tone

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) -34
Max RF gain - 8dB (Main address 1 D[7:5] = 110) -25
Max RF gain - 16dB (Main address 1 D[7:5] = 101) -18
Max RF gain - 32dB (Main address 1 D[7:5] = 001) -1

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)

loaded with 10kI differential load resistance and 10pF

RMS

= 2.85V, TA = +25NC,

CC

200 ns

4.5

15

4.5

15

-13

-5

11

-13

-5

11

-24

-24

dB

dBm

dBm

dBm

4 ______________________________________________________________________________________

5GHz, 5-Channel MIMO Receiver

AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -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
load capacitance. RSSI pin is loaded with 10kI load resistance to ground. Typical values measured at V
channel bandwidths of 40MHz.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Output 1dB Gain Compression

Baseband -3dB Lowpass Corner
Frequency

Baseband Filter Stopband
Rejection

Baseband -3dB Highpass
Corner Frequency

Steady-State I/Q Output DC Error
with AC-Coupling

I/Q Gain Imbalance 1MHz baseband output, 1-sigma value 0.1 dB
I/Q Phase Imbalance 1MHz baseband output, 1-sigma value 0.2 deg
Sideband Suppression 1MHz baseband output 40 dB

Receiver Spurious Signal
Emissions

RF RSSI Output Voltage -25dBm input power 1.6 V
Baseband RSSI Slope 18 26.5 37 mV/dB

Baseband RSSI Maximum
Output Voltage

Baseband RSSI Minimum Output
Voltage

RF Loopback Conversion Gain

Over passband frequency range, at any gain setting,
1dB compression point

Main address 0 D1 = 0 9.5
Main address 0 D1 = 1 19
Rejection at 30MHz offset frequency for 20MHz channel 74
Rejection at 60MHz offset frequency for 40MHz channel 69
Main address 5 D1 = 1 600

Main address 5 D1 = 0, Main address 4 D3 = 0 (Note 3) 0.1

50Fs after enabling receive mode and togging RXHP
from 1 to 0, averaged over many measurements if I/Q
noise voltage exceeds 1mV
ting, no input signal, 1-sigma value

LO frequency -75
2O LO frequency
3O LO frequency
4O LO frequency

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)

RMS

loaded with 10kI differential load resistance and 10pF

RMS

= 2.85V, TA = +25NC,

CC

0.63 V

, at any given gain set-

-17.1 -10 -1.7 dB

2 mV

-62

-75

-54

2.3 V

0.5 V

P-P

MHz

dB

kHzMain address 5 D1 = 0, Main address 4 D3 = 1 10

dBm/

MHz

MAX2851

_______________________________________________________________________________________ 5

5GHz, 5-Channel MIMO Receiver

AC ELECTRICAL CHARACTERISTICS—Tx MODE

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -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 TXRF+ and TXRF- differential ports
using the Typical Operating Circuit; 100mV
DC-coupled). Typical values measured at V

PARAMETER CONDITIONS MIN TYP MAX UNITS

TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS
Includes Matching and Balun Loss

MAX2851

RF Output Frequency Range 4.9 5.9 GHz

Peak-to-Peak Gain Variation
Over RF Band

Maximum Output Power

Output 1dB Gain Compression

Input 1dB Gain Compression

Gain Control Range 24 31.5 34 dB
Gain Control Step 0.5 dB
RF Output Return Loss -3 dB

Unwanted Sideband

Carrier Leakage

Tx I/Q Input Impedance (R || C)

Baseband Filter Stopband
Rejection

Tx Calibration Ftone Level

Tx Calibration RF Gain Step
Relative to Maximum Gain

Tx Calibration Baseband Gain
Step Relative to Maximum Gain

At one temperature 0.7 1.55 dB

20MHz OFDM signal conforming to spectral emission
mask and -34dB EVM

40MHz OFDM signal confirming to spectral emission
mask and -34dB EVM

Relative to typical maximum output power at 9.5MHz
input frequency

At 19MHz input frequency, over input common-mode
voltage between 0.5V and 1.1V

Over RF channel, RF frequency, baseband frequency,
and gain settings (Note 4)

Over RF channel, RF frequency, and gain settings
(Note 4)

Minimum differential resistance 60 kI
Maximum differential capacitance 2 pF
At 30MHz frequency offset for 20MHz RF channel 86
At 60MHz frequency offset for 40MHz RF channel 67

At Tx gain code (Main address 9 D[9:4]) = 100010 and

-15dBc carrier leakage (Local address 27 D[2:0] = 110
and Main address 1 D[3:0] = 0000)

Local address 27 D[1:0] = 01 -14
Local address 27 D[1:0] = 00 -28

Local address 27 D2 = 0 -5 dB

sine and cosine signal applied to I/Q baseband inputs of transmitter (differential

RMS

= 2.85V, TA = +25NC, channel bandwidths of 40MHz.) (Note 1)

CC

-3

-3

11 dBc

380 mV

-40 dBc

-29 -15 dBc

-24 dBV

dBm

RMS

dB

RMS

dB

6 ______________________________________________________________________________________

5GHz, 5-Channel MIMO Receiver

AC ELECTRICAL CHARACTERISTICS—FREQUENCY SYNTHESIS

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -25NC to +85NC, freq = 5.35GHz. Reference freq = 40MHz,
ENABLE = high, CS = high, SCLK = DIN = low. Typical values measured at V

PARAMETER CONDITIONS MIN TYP MAX UNITS

FREQUENCY SYNTHESIZER

RF Channel Center Frequency 4.9 5.9 GHz

Channel Center Frequency
Programming Step

Closed-Loop Integrated Phase
Noise

Charge-Pump Output Current 0.8 mA

Spur Level

Reference Frequency 40 MHz

Reference Frequency Input
Levels

Maximum Crystal Motional
Resistance

Crystal Capacitance Tuning
Range

Crystal Capacitance Tuning Step 140 fF

CLKOUT Signal Level 10pF load capacitance

CLKOUT2 Signal Level 4pF load capacitance 0.3 V

Loop BW = 200kHz, integrate phase noise from 1kHz
to 10MHz

= 0 to 19MHz -42

f

OFFSET

= 40MHz -66

f

OFFSET

AC-coupled to XTAL pin 800 mV

Base-to-ground capacitance 30 pF

= 2.85V, TA = +25NC, LO freq = 5.35GHz.) (Note 1)

CC

76.294 Hz

-35 dBc

50

-

V

CC

0.8

VCC -

0.1

dBc

I

V

P-P

P-P

P-P

MAX2851

AC ELECTRICAL CHARACTERISTICS—MISCELLANEOUS BLOCKS

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -25NC to +85NC. Reference freq = 40MHz, ENABLE =
high, CS = high, SCLK = DIN = low. Typical values measured at V

PARAMETER CONDITIONS MIN TYP MAX UNITS

PA POWER-DETECTOR MUX

Output Voltage Drop

PA ON/OFF CONTROL

V

CC_PA_BIAS

V

CC_PA_BIAS

Output High Level 10mA load current, Main address 11 D[7:5] = 011 2.8 V
Output Low Level 1mA load current, Main address 11 D[7:5] = 011 25 mV
Turn-On Time

ON-CHIP TEMPERATURE SENSOR

Digital Output Code

Input Voltage Range 3.1 3.6 V

Supply Current With 10mA load at PA_BIAS 10.5 mA

_______________________________________________________________________________________ 7

= 2.0V, load resistance = 10kI to ground

V

IN

Measured from CS rising edge

Readout at DOUT pin
through Main address 3
D[4:0]

= 2.85V, TA = +25NC.) (Note 1)

CC

= +25NC

T

A

T

= +85NC

A

T

= -25NC

A

15 32 mV

0.3

13
22

2

Fs

5GHz, 5-Channel MIMO Receiver

AC ELECTRICAL CHARACTERISTICS—TIMING

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -25NC to +85NC, freq = 5.35GHz. Reference freq =
40MHz, ENABLE = high, CS = high, SCLK = DIN = low. Typical values measured at V
(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SYSTEM TIMING

Shutdown Time 2

MAX2851

Maximum Channel Switching
Time

Maximum Channel Switching
Time with Preselected VCO
Sub-Band

Rx/Tx Turnaround Time

Tx Turn-On Time (from Standby
Mode)

Tx Turn-Off Time (to Standby
Mode)

Rx Turn-On Time (from Standby
Mode)

Rx Turn-Off Time (to Standby
Mode)

Loop bandwidth = 200kHz, settling to
within Q1kHz from steady state

Loop bandwidth = 200kHz, settling to
within Q1kHz from steady state

Rx to Tx mode, Tx gain

Measured
from CS ris­ing edge

Measured from CS rising edge, Tx gain
settles to within 0.2dB of steady state

From CS rising edge

Measured from CS rising edge, Rx gain
settles to within 0.5dB of steady state

From CS rising edge

settles to within 0.2dB of
steady state

Tx to Rx mode with RXHP =
1, Rx gain settles to within

0.5dB of steady state

= 2.85V, TA = +25NC, LO freq = 5.35GHz.)

CC

2 ms

56

2

2

2

0.1

2

0.1

Fs

Fs

Fs

Fs

Fs

Fs

Fs

8 ______________________________________________________________________________________

5GHz, 5-Channel MIMO Receiver

AC ELECTRICAL CHARACTERISTICS—TIMING (continued)

(Operating conditions unless otherwise specified: VCC = 2.7V to 3.6V, TA = -25NC to +85NC, freq = 5.35GHz. Reference freq =
40MHz, ENABLE = high, CS = high, SCLK = DIN = low. Typical values measured at V
(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

4-WIRE SERIAL INTERFACE TIMING (Figure 1)

SCLK Rising Edge to CS Falling
Edge Wait Time

Falling Edge of CS to Rising
Edge of First SCLK Time

DIN to SCLK Setup Time t
DIN to SCLK Hold Time t
SCLK Pulse-Width High t
SCLK Pulse-Width Low t

Last Rising Edge of SCLK to
Rising Edge of CS or Clock to
Load Enable Setup Time

CS High Pulse Width

Time Between Rising Edge of
CS and the Next Rising Edge of
SCLK

SCLK Frequency f
Rise Time t
Fall Time t

Note 1: The MAX2851 is production tested at TA = +25NC, minimum/maximum limits at TA = +25NC are guaranteed by test unless

otherwise specified. Minimum/maximum limits at TA = -25NC and +85NC are guaranteed by design and characterization. There
is no power-on register settings self-reset; recommended register settings must be loaded after VCC is applied.

Note 2: Minimum/maximum limit is guaranteed by design and characterization.
Note 3: It is currently not recommended and not tested. For test coverage support, contact manufacturer.
Note 4: For optimal Rx and Tx quadrature accuracy over temperature, the user can utilize the Rx calibration and Tx calibration circuit

to assist quadrature calibration.

t

CSO

t

CSS

DS

DH

CH

CL

t

CSH

t

CSW

t

CS1

CLK

6 ns

R

F

= 2.85V, TA = +25NC, LO freq = 5.35GHz.)

CC

6 ns

6 ns

6 ns
6 ns
6 ns
6 ns

50 ns

6 ns

40 MHz

2.5 ns

2.5 ns

MAX2851

_______________________________________________________________________________________ 9

5GHz, 5-Channel MIMO Receiver

Typical Operating Characteristics

(VCC = 2.8V, TA = +25NC, f
output of balun, using the MAX2851 Evaluation Kit, unless otherwise noted.)

Rx MODE SINGLE-CHANNEL

SUPPLY CURRENT

152

MAX2851

150

(mA)

CC

I

148

146

144

142

140

138

TA = +85°C

2.6 3.6

Rx3 MAXIMUM GAIN vs. FREQUENCY

75

70

65

60

55

50

45

GAIN (dB)

40

35

30

25

20

4.9 5.9
FREQUENCY (GHz)

= 5.35GHz, f

LO

TA = +25°C

TA = -40°C

VCC (V)

LNA = MAX GAIN

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 24dB

LNA = MAX - 32dB

LNA = MAX - 40dB

= 40MHz, CS = high, SCLK = DIN = low, RF BW = 20MHz, Tx output at 50ω unbalanced

REF

RECEIVER

Rx NOISE FIGURE vs. VGA GAIN

Rx MODE 5-CHANNEL SUPPLY CURRENT

390

385

MAX2851 toc01

380

375

(mA)

CC

I

370

365

360

3.53.43.33.23.13.02.92.82.7

355

TA = +85°C

TA = +25°C

TA = -40°C

2.6 3.6
VCC (V)

MAX2851 toc02

3.53.43.33.23.13.02.92.82.7

Rx3 MAXIMUM GAIN

vs. TEMPERATURE AND FREQUENCY

74

73

MAX2851 toc04

72

71

70

69

GAIN (dB)

68

67

66

65

5.85.75.5 5.65.1 5.2 5.3 5.45.0

64

TA = -20°C

MAX2851 toc05

TA = +25°C

TA = +85°C

5.85.75.5 5.65.1 5.2 5.3 5.45.04.9 5.9

FREQUENCY (GHz)

SETTINGS (BALUN INPUT REFERRED)

45

40

35

30

25

20

NOISE FIGURE (dB)

15

10

5

0

0 14 15

Rx VGA GAIN SETTINGS

Rx2 MAXIMUM GAIN WITH FIXED

LNA SUB-BAND (MAIN ADDRESS 2 D[6:5])

75

73

71

69

67

65

GAIN (dB)

63

61

59

57

55

BAND 0

BAND 1

FREQUENCY (GHz)

BAND 2

BAND 3

MAX - 40dB

MAX - 32dB

MAX - 24dB

MAX - 16dB

MAX - 8dB

MAX2851 toc03

MAX

131210 113 4 5 6 7 8 91 2

MAX2851 toc06

5.85.75.5 5.65.1 5.2 5.3 5.45.04.9 5.9

Rx MAXIMUM GAIN vs. FREQUENCY

71

70

69

68

GAIN (dB)

67

66

65

64

Rx3

Rx2

Rx1

FREQUENCY (GHz)

Rx4

Rx5

5.85.75.5 5.65.1 5.2 5.3 5.45.04.9 5.9

MAX2851 toc07

Rx GAIN vs. BASEBAND VGA GAIN

80

70

60

50

40

30

GAIN (dB)

20

10

0

-10
0 16

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 24dB

BASEBAND VGA GAIN CODE

LNA = MAX - 32dB

LNA = MAX - 40dB

LNA = MAX

MAX2851 toc08

14128 104 62

Rx OUTPUT V

1.4

FBB = 1MHz

FBB = 19MHz

0

0 16

BASEBAND VGA GAIN CODE

)

(V

OUTPUT V

RMS

1dB

1.2

1.0

0.8

0.6

0.4

0.2

10 _____________________________________________________________________________________

vs. GAIN SETTING

1dB

TA = +25°C

TA = +85°C

TA = +25°C

MAX2851 toc09

TA = -20°CTA = -20°C

TA = +85°C

1412108642

5GHz, 5-Channel MIMO Receiver

Rx RF RSSI ATTACK TIME

Typical Operating Characteristics (continued)

(VCC = 2.8V, TA = +25NC, f
output of balun, using the MAX2851 Evaluation Kit, unless otherwise noted.)

Rx EVM vs. INPUT POWER

(CHANNEL BANDWIDTH = 20MHz)

-15

-20

-25

Rx EVM (dB)

-30

-35

-40

-90 10

LNA = MAX

LNA = MAX = -8dB

LNA = MAX = -16dB

LNA = MAX = -24dB

INPUT POWER (dBm)

Rx4 EMISSION SPECTRUM AT LNA INPUT

(LNA MAX GAIN)

0

-10

-20

-30

-40

-50

-60

OUTPUT POWER (dBm)

-70

-80

-90

-100
0Hz 2.65GHz

2 LO

2.65GHz/div

RF FREQUENCY

= 5.35GHz, f

LO

LNA = MAX = -40dB

LNA = MAX = -32dB

-10-30-50-70

4 LO

= 40MHz, CS = high, SCLK = DIN = low, RF BW = 20MHz, Tx output at 50ω unbalanced

REF

Rx EVM vs. OFDM JAMMER POWER AT

MAX2851 toc10

Rx EVM vs. Rx BASEBAND

OUTPUT LEVEL

12

10

8

6

Rx EVM (%)

4

2

0

-30 0

VGA GAIN = 2/4/6/8/10/12/14

VGA GAIN = 0

VGA GAIN =

3/5/7/9/11/13/15

Rx BASEBAND OUTPUT LEVEL (dBV

-5-10-15-20-25

RMS

MAX2851 toc11

)

20MHz AND 40MHz OFFSET FREQUENCY

WITH WANTED SIGNAL AT -66dBm

14

12

10

8

6

Rx EVM (%)

4

2

0

-40 10

20MHz OFFSET

40MHz OFFSET

INPUT POWER (dBm)

Rx INPUT IMPEDANCE

Rx3 INPUT RETURN LOSS

TA = -40°C

4.8 6.0
FREQUENCY (GHz)

TA = +25°C

TA = +85°C

MAX2851 toc13

60

AT MAX LNA GAIN

50

40

30

20

Rx2, 3, 4

REAL PART (I)

10

0

-10

-20

4.9 5.9

Rx5

Rx1

RF FREQUENCY (GHz)

Rx5

Rx1

Rx2, 3, 4

MAX2851 toc14

5.85.75.0 5.1 5.2 5.4 5.55.3 5.6

40

30

20

10

-10

-20

-30

-40

0

-2

-4

IMAGINARY PART (

-6

-8

0

-10

S11 (dB)

-12

I

)

-14

-16

-18

-20

50-5-10-15-20-25-30-35

5.85.65.45.25.0

MAX2851

MAX2851 toc12

MAX2851 toc15

0

-2

-4

-6

-8

-10

S11 (dB)

-12

-14

-16

-18

-20

4.8 6.0

Rx1, 2, 4

Rx5

FREQUENCY (GHz)

______________________________________________________________________________________ 11

Rx INPUT RETURN LOSS

Rx3

2.5

Rx RF RSSI OUTPUT

MAX2851 toc16

2.0

1.5

1.0

RF RSSI OUTPUT VOLTAGE (V)

0.5

5.85.65.45.25.0

0

LOW GAIN, TA = +85°C

LOW GAIN,
TA = +25°C

LOW GAIN,
TA = -20°C

HIGH GAIN, TA = -20°C

-50 0
RF INPUT POWER (dBm)

HIGH GAIN,
T

= +85°C

A

HIGH GAIN,
TA = +25°C

MAX2851 toc17

1.0V/div

0V

1.0V/div

0V

-5-10-15-20-25-30-35-40-45

(+40dB SIGNAL STEP)

D: 280ns
@: 192ns

GAIN CONTROL

V

RSSI

400ns/div

MAX2851 toc18

D: 1.32V
@: 1.84V

5GHz, 5-Channel MIMO Receiver

Typical Operating Characteristics (continued)

(VCC = 2.8V, TA = +25NC, f
output of balun, using the MAX2851 Evaluation Kit, unless otherwise noted.)

= 5.35GHz, f

LO

= 40MHz, CS = high, SCLK = DIN = low, RF BW = 20MHz, Tx output at 50ω unbalanced

REF

Rx RF RSSI DELAY TIME

(-40dB SIGNAL STEP)

MAX2851

1.0V/div

0V

1.0V/div

0V

2.7V

0V

2.0V

0.6V

GAIN CONTROL

V

RSSI

Rx BASEBAND RSSI

-32dB STEP RESPONSE

LNA GAIN CONTROL

RSSI OUTPUT

400ns/div

D: 1.18µs
@: 1.16

D: 216ns
@: 128ns

µs

MAX2851 toc19

D: 1.30V
@: 460mV

MAX2851 toc22

D: 1.62V
@: 480mV

BASEBAND RSSI VOLTAGE

vs. INPUT POWER

3.0

2.5

2.0

1.5

1.0

0.5

BASEBAND RSSI OUTPUT VOLTAGE (V)

0

-100 20

LNA = MAX

LNA = MAX - 8dB

RF INPUT POWER (dBm)

LNA = MAX - 40dB

MAX - 24dB

LNA = MAX - 32dB

LNA = MAX - 16dB

Rx LPF 20MHz CHANNEL BANDWIDTH

RESPONSE

-35

RESPONSE (dB)

LNA =

Rx BASEBAND RSSI

+40dB STEP RESPONSE

D: 460ns

1

µs/div

@: 440ns

MAX2851 toc20

2.7V

0V

2.4V

0.8V

0-20-40-60-80

LNA GAIN CONTROL

RSSI OUTPUT

MAX2851 toc21

D: 1.50V
@: 2.30V

Rx LPF 40MHz CHANNEL BANDWIDTH

RESPONSE

-35

MAX2851 toc23

RESPONSE (dB)

MAX2851 toc24

1

µs/div

Rx LPF 20MHz CHANNEL

BANDWIDTH GROUP DELAY

100

GROUP DELAY (ns)

0

10k 100M

FREQUENCY (Hz)

MAX2851 toc25

-135
10k 100M

BASEBAND FREQUENCY (Hz)

Rx LPF 40MHz CHANNEL

BANDWIDTH GROUP DELAY

100

GROUP DELAY (ns)

0

10k 100M

FREQUENCY (Hz)

MAX2851 toc26

-135
10k 100M

FREQUENCY (Hz)

Rx DC OFFSET SETTLING RESPONSE

(-30dB Rx VGA GAIN STEP)

GAIN-CONTROL
TOGGLE

0V

Rx BASEBAND

I/Q OUTPUT

50mV/div

12 _____________________________________________________________________________________

MAX2851 toc27

CH1 PEAK TO
PEAK: 81.9mV

200ns/div