MAXIM MAX2839AS Technical data

General Description

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 incorpo­rates one transmitter and two receivers, with > 40dB iso­lation 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 base­band/control interface. The device includes a fast-set­tling 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 trans­ceiver 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 program­mable monolithic filters for both the receiver and trans­mitter, 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 lin­earity specifications. The device supports up to 2048
FFT OFDM and implements programmable channel fil­ters 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

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

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

________________________________________________________________

Maxim Integrated Products

1

19-4588; Rev 1; 5/10

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.

EVALUATION KIT

AVAILABLE

WiMAX is a trademark of the WiMAX Forum.

SPI is a trademark of Motorola, Inc.

Ordering Information

+

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Bump Configuration and Typical Operating Circuit appear at
end of data sheet.

PART TEMP RANGE PIN-PACKAGE

MAX2839ASEWO+T

-40°C to +85°C 73 WLP

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

2 _______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS

(MAX2839AS Evaluation Kit. Unless otherwise noted, VCC_ = 2.7V to 3.6V, TA= -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, fLO= 2.5GHz, and TA= +25°C.) (Note 2)

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.

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

.

CAUTION! ESD SENSITIVE DEVICE

Supply Voltage VCC_ 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 µA

LOGIC INPUTS: TXRX, ENABLE, SCLK, DIN, CS, B7:B0, CLKOUT_DIV, RXHP

Digital Input-Voltage High, V

Digital Input-Voltage Low, V

Digital Input-Current High, I

PARAMETER CONDITIONS MIN TYP MAX UNITS

IH

IL

IH

Shutdown mode, T
V

CC

Clock-out only mode 2.7 3.8

Standby mode 33 50

Rx mode

Tx mode

Rx calibration mode, both receivers on 153 200

Tx calibration mode 102 145

D[9:8] = 00 in A[4:0] = 00100 0.8 1.05 1.35

D[9:8] = 01 in A[4:0] = 00100 1.15

D[9:8] = 10 in A[4:0] = 00100 1.25

D[9:8] = 11 in A[4:0] = 00100 1.45

DC-coupled 0.5 1.2 V

= +25°C; all logic inputs equal 0 or

A

One receiver on 79 101

Both receivers on 120 148

16 QAM 116 148

64 QAM (Note 3) 145 183

2µA

VCC - 0.4 V

0.4 V

-1 +1 µA

mA

V

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(MAX2839AS Evaluation Kit. Unless otherwise noted, VCC_ = 2.7V to 3.6V, TA= -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, fLO= 2.5GHz, and TA= +25°C.) (Note 2)

AC ELECTRICAL CHARACTERISTICS—Rx MODE

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, TA= +25°C, fRF= 2.4999GHz, fLO= 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 MIN TYP MAX UNITS

Digital Input-Current Low, I

LOGIC OUTPUTS: DOUT, CLKOUT

Digital Output-Voltage High, V

Digital Output-Voltage Low, V

IL

OH

OL

Sourcing 100µA VCC - 0.4 V

Sinking 100µA 0.4 V

-1 +1 µA

RF INPUT TO I, Q BASEBAND-LOADED OUTPUT

RF Input Frequency Range 2.3 2.7 GHz

Peak-to-Peak Gain Variation over
RF Input Frequency Range

RF Input Return Loss All LNA settings 12 dB

Total Voltage Gain

RF Gain Steps

Gain Change Settling Time

Baseband Gain Range

Baseband Gain Step Size 1dB

DSB Noise Figure
(Including Balun Loss)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Tested at band edges and band center 1.5 dB

T
+85°C

From max RF gain (B7:B6 = 00) to max RF gain - 8dB
(B7:B6 = 01)

From max RF gain to max RF gain - 16dB (B7:B6 = 10) 16

From max RF gain to max RF gain - 32dB (B7:B6 = 11) 32

Any RF or baseband gain change; gain settling to within
±1dB of steady state; RXHP = 1

Any RF or baseband gain change; gain settling to within
±0.1dB of steady state; RXHP = 1

From maximum baseband gain (B5:B0 = 000000) to
minimum gain (B5:B0 = 111111), T

Voltage gain = 65dB with max RF gain (B7:B6 = 00) 3.5

V ol tag e g ai n = 50d B w i th m ax RF g ai n - 8d B ( B7:B6 = 01) 8.5

Voltage gain = 45dB with max RF gain - 16dB
(B7:B6 = 10)

Voltage gain = 15dB with max RF gain - 32dB
(B7:B6 = 11)

= -40°C to

A

Maximum gain, B7:B0 = 0000000 92 99

Minimum gain, B7:B0 = 1111111 4 10

8

200

2000

= -40°C to +85°C

A

60.5 63 65.5 dB

14.5

32

dB

dB

ns

dB

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, TA= +25°C, fRF= 2.4999GHz, fLO= 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)

Out-of-Band Input IP3 (Note 4)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Inband Input P-1dB

Maximum Output Signal Level

I/Q Gain Imbalance 100kHz IQ baseband output; 1 σ variation 0.05 dB

I/Q Phase Error 100kHz IQ baseband output; 1 σ variation 0.25 Degrees

Rx I/Q Output Load Impedance
(R || C)

Loopback Gain (for Receiver I/Q
Calibration)

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)

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) -37

Max RF gain - 8dB (B7:B6 = 01) -29

Max RF gain - 16dB (B7:B6 = 01) -21

Max RF gain - 32dB (B7:B6 = 11) -4

Over passband frequency range at VGA gain between
max and max - 54dB; 1dB compression point

Minimum differential resistance 10 kΩ

Maximum differential capacitance 5 pF

Transmitter I/Q input to receiver I/Q output; transmitter
B6:B1 = 000011, receiver B5:B0 = 101010 programmed
through SPI

-13

-9

-7

+16

1.15 V

-6 -1 +4.5 dB

dBm

dBm

P-P

After switching RXHP to 0; average over 1µs after any

I/Q Output DC Droop

I/Q Static DC Offset

Isolation Between Rx Channels A
and B

RECEIVER BASEBAND FILTERS

Baseband Filter Rejection

Baseband Highpass Filter Corner
Frequency

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 40 dB

At 15MHz 57

At 20MHz 75

At > 40MHz 75

RXHP = 1 (used before AGC completion) 650

D[5:4] = 00 0.1

RXHP = 0 (used after AGC
completion) address A[4:0] = 01110

D[5:4] = 01 1

D[5:4] = 10 30

D[5:4] = 11 100

1 V/s

1mV

dB

kHz

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver

_______________________________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, TA= +25°C, fRF= 2.4999GHz, fLO= 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)

RF Channel BW Supported by
Baseband Filter

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 R

RSSI Maximum Output Voltage R

RSSI Slope 29 mV/dB

RSSI Output Settling Time To within 3dB of steady state

PARAMETER CONDITIONS MIN TYP MAX UNITS

A[4:0] = 00100 serial bits D[9:6] = 0000 1.75

A[4:0] = 00100 serial bits D[9:6] = 0001 2.25

A[4:0] = 00100 serial bits D[9:6] = 0010 3.5

A[4:0] = 00100 serial bits D[9:6] = 0011 5.0

A[4:0] = 00100 serial bits D[9:6] = 0100 5.5

A[4:0] = 00100 serial bits D[9:6] = 0101 6.0

A[4:0] = 00100 serial bits D[9:6] = 0110 7.0

A[4:0] = 00100 serial bits D[9:6] = 0111 8.0

A[4:0] = 00100 serial bits D[9:6] = 1000 9.0

A[4:0] = 00100 serial bits D[9:6] = 1001 10.0

A[4:0] = 00100 serial bits D[9:6] = 1010 12.0

A[4:0] = 00100 serial bits D[9:6] = 1011 14.0

A[4:0] = 00100 serial bits D[9:6] = 1100 15.0

A[4:0] = 00100 serial bits D[9:6] = 1101 20.0

A[4:0] = 00100 serial bits D[9:6] = 1110 24.0

A[4:0] = 00100 serial bits D[9:6] = 1111 28.0

0 to 2.3MHz for RF BW = 5MHz 1.3

0 to 4.6MHz for RF BW = 10MHz 1.3

0 to 2.3MHz for RF BW = 5MHz 90

0 to 4.6MHz for RF BW = 10MHz 50

At 2.3MHz 1.8

At > 8.75MHz 75

At 4.6MHz 1.6

At > 17.5MHz 75

≥ 10kΩ 0.6 V

LOAD

≥ 10kΩ 2.1 V

LOAD

+32dB signal step 200

-32dB signal step 800

dB

ns

MHz

P-P

P-P

dB

dB

ns

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

6 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS—Tx MODE

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, TA= +25°C, fRF= 2.501GHz, fLO= 2.5GHz, f

REF

= 40MHz,

ENABLE = CS = high, TXRX = 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. 1MHz 90mV

RMS

cosine and sine signals applied

to I/Q baseband inputs of transmitter (differential DC-coupled)). (Note 2)

Tx BASEBAND I/Q INPUTS TO RF OUTPUTS

RF Output Frequency Range 2.3 2.7 GHz

Peak-to-Peak Peak Gain Variation
over RF Band

Total Voltage Gain Max gain - 3dB; at unbalanced 50Ω matched output 3.5 8 dB

Max Output Power over
Frequency

RF Output Return Loss 8dB

RF Gain Control Range B6:B1 = 000000 to 111111 62 dB

Unwanted Sideband Suppression

RF Gain Control Binary Weights

Carrier Leakage

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

Baseband Frequency Response
for 5MHz RF Channel BW

Baseband Frequency Response
for 10MHz RF Channel BW

Baseband Group Delay Ripple

PARAMETER CONDITIONS MIN TYP MAX UNITS

64 QAM OFDM signal conforming to spectral emission
mask and -36dB EVM after I/Q imbalance calibration by
modem (Note 5)

Without calibration by modem, and excludes modem I/Q
imbalance; P

B1 1

B2 2

B3 4

B4 8

B5 16

B6 32

Relative to 0dBm output power; without calibration by
modem

Differential resistance 100 kΩ

Differential capacitance 0.5 pF

0 to 3.333MHz 0.9

At > 9.45MHz 43

0 to 6.667MHz 0.9

At > 18.9MHz 43

0 to 3.333MHz (RF BW = 5MHz) 20

0 to 6.667MHz (RF BW = 10MHz) 12

OUT

= 0dBm

12dB

0 dBm

40 dB

-30 dBc

dB

dB

dB

ns

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver

_______________________________________________________________________________________ 7

AC ELECTRICAL CHARACTERISTICS—FREQUENCY SYNTHESIS

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, TA= +25°C, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, SCLK = DIN

= low, PLL closed-loop unity gain bandwidth = 120kHz. VCO and RF synthesis enabled.) (Note 2)

RF Channel Center Frequency
Range

Channel Center Frequency
Programming Minimum Step Size

Charge-Pump Comparison
Frequency

Reference Frequency Range 15 40 80 MHz

Reference Frequency Input
Levels

Reference Frequency Input
Impedance (R||C)

Programmable Reference Divider
Values

Closed-Loop Integrated Phase
Noise

Charge-Pump Output Current On each differential side 0.8 mA

Close-In Spur Level

Reference Spur Level -85 dBc

Turnaround LO Frequency Error

PARAMETER CONDITIONS MIN TYP MAX UNITS

AC-coupled to REFCLK pin 0.6 V

Resistance (REFCLK pin) 10 kΩ

Capacitance (REFCLK pin) 1 pF

Integrate phase noise from 200Hz to 5MHz; charge­pump comparison frequency = 40MHz

f

= 0 to 1.8MHz -40

OFFSET

f

= 1.8MHz to 7MHz -70

OFFSET

f

> 7MHz -80

OFFSET

Relative to steady state; measured 35µs after Tx-Rx or
Rx-Tx switching instant, and 4µs after any receiver gain
changes

2.3 2.7 GHz

28.61 Hz

40 MHz

124

-39 dBc

±50 Hz

P-P

dBc

Temperature Range Over Which
VCO Maintains Lock

Reference Output Clock Divider
Values

Output Clock Drive Level 20MHz output, A[4:0] = 10100, D5 = 0 2.4 V

Output Clock Load Impedance
(R||C)

Relative to the ambient temperature T

CLKOUT_DIV pin = 0 1

CLKOUT_DIV pin = 1 2

Resistance 10 kΩ

Capacitance 2 pF

at initial lock TA ±40 °C

A

P-P

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

8 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS—MISCELLANEOUS BLOCKS

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, f

REF

= 40MHz, CS = high, SCLK = DIN = low, and TA= +25°C.) (Note

AC ELECTRICAL CHARACTERISTICS—TIMING

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, SCLK = DIN = low, PLL

closed-loop unity gain bandwidth = 120kHz, and T

A

= +25°C.) (Note 2)

PA BIAS DAC: VOLTAGE MODE

Output High level 10mA source current VCC - 0.1 V

Output Low level 100µA sink current 0.1 V

Turn-On Time

CRYSTAL OSCILLATOR

On-Chip Tuning Capacitance
Range

On-Chip Tuning Capacitance
Step Size

ON-CHIP TEMPERATURE SENSOR

Digital Output Code

PARAMETER CONDITIONS MIN TYP MAX UNITS

Excludes programmable delay of 0 to 7µs in steps of

0.5µs

M axi m um cap aci tance, A[ 4:0] = 11000, D [ 6:0] = 1111111 15.5

Minimum capacitance, A[4:0] = 11000, D[6:0] = 0000000 0.5

Readout at DOUT pin through SPI
A[4:0] = 01011, D[4:0]

200 ns

0.12 pF

TA = +25°C 01111

TA = +85°C 11101

T

= -40°C 00001

A

pF

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SYSTEM TIMING

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)

Measured from Tx or
Rx enable edge;
signal settling to
within 2dB of steady
state

Measured from Tx-enable edge; signal
settling to within 2dB of steady state

From Tx-disable edge 0.1 µs

Measured from Rx-enable edge; signal
settling to within 2dB of steady state

From Rx-disable edge 0.1 µs

Rx to Tx 2

Tx to Rx, RXHP = 1 2

µs

2µs

2µs

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
BroadbandRF Transceiver

_______________________________________________________________________________________ 9

AC ELECTRICAL CHARACTERISTICS—TIMING (continued)

(MAX2839AS Evaluation Kit. Unless otherwise noted, V

CC_

= 2.8V, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, SCLK = DIN = low, PLL

closed-loop unity gain bandwidth = 120kHz, and T

A

= +25°C.) (Note 2)

Note 2: Min/max limits are production tested at T

A

= +85°C. Min/max limits at TA= -40°C and TA= +25°C are guaranteed by
design and characterization. The power-on default register settings are not production tested. Load register setting 10µs
after V

CC

is applied.

Note 3: Tx mode supply current is specified for 64 QAM while achieving the Tx output spectrum mask shown in the

Typical Operating

Characteristics

. The supply current can be reduced for 16 QAM signal by adjusting the Tx bias settings through the SPI.

Note 4: Two tones at +20MHz and +39MHz offset with -35dBm/tone. Measure IM3 at 1MHz.
Note 5: Gain adjusted over max gain and max gain -3dB.

4-WIRE SERIAL PARALLEL INTERFACE TIMING (see 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 t

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

Clock Frequency f

Rise Time t

Fall Time t

SCLK Falling Edge to Valid DOUT t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

t

CSO

t

CSS

DS

DH

CH

CL

t

CSH

CSW

t

CS1

CLK

R

F

D

6ns

6ns

6ns

6ns

6ns

6ns

6ns

20 ns

6ns

40 MHz

0.1/f

CLK

0.1/f

CLK

12.5 ns

ns

ns

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

10 ______________________________________________________________________________________

Typical Operating Characteristics

(V

CC_

= 2.8V, TA = +25°C, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω

unbalanced output of balun, using the MAX2839AS Evaluation Kit.)

DUAL Rx SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

MAX2839ASWO+T toc02

2.7 3.0 3.3 3.6

80

90

100

110

120

130

140

TA = -40°C

TA = +25°C

TA = +85°C

Rx MAX GAIN

vs. TEMPERATURE AND FREQUENCY

FREQUENCY (GHz)

RX MAX GAIN (dB)

MAX2939ASWO+T toc05

2.3 2.5 2.62.4 2.7

94

96

98

100

102

TA = -40°C

TA = +25°C

TA = +85°C

RX_B TO RX_A ISOLATION

vs. LNA GAIN SETTING

LNA GAIN SETTING (dB)

RECEIVER ISOLATION (dB)

MAX2839ASWO+T toc08

-35 -25 -15 -5-30 -20 -10 0 5

38

40

42

44

46

LNA = MAX GAIN

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 32dB

SINGLE Rx SUPPLY CURRENT

vs. SUPPLY VOLTAGE

90

85

80

75

TA = +85°C

MAX2839ASWO+T toc01

Rx NOISE FIGURE

vs. BASEBAND GAIN SETTING

40

30

20

LNA = MAX - 32dB

LNA = MAX - 16dB

MAX2839ASWO+T toc03

70

SUPPLY CURRENT (mA)

65

60

TA = +25°C

2.7 3.0 3.3 3.6
SUPPLY VOLTAGE (V)

TA = -40°C

Rx GAIN vs. FREQUENCY

110

LNA = MAX GAIN

100

90

GAIN (dB)

80

LNA = MAX - 32dB

70

60

2.30 2.50 2.602.35 2.55 2.652.40 2.45 2.70
FREQUENCY (GHz)

LNA = MAX - 8dB

LNA = MAX - 16dB

Rx OUTPUT V

1.6

MAX2839ASWO+T toc04

vs. GAIN SETTING

1dB

NOISE FIGURE (dB)

LNA = MAX - 8dB

10

LNA = MAX GAIN

0

0 9 18 27 36 45 54 63

BASEBAND VGA GAIN CODE

Rx VOLTAGE GAIN

vs. BASEBAND GAIN SETTING

120

LNA = MAX - 8dB

80

40

VOLTAGE GAIN (dB)

LNA = MAX - 16dB

LNA = MAX - 32dB

0

0 9 18 27 36 45 54 63

BASEBAND VGA CODE

LNA = MAX

MAX2839ASWO+T toc06

1.2

)

RMS

(V

1dB

0.8

OUTPUT V

0.4

0

0 9 18 27 36 45 54 63

BASEBAND VGA CODE

MAX2839ASWO+T toc07

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

______________________________________________________________________________________

11

Typical Operating Characteristics (continued)

(V

CC_

= 2.8V, TA = +25°C, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω

unbalanced output of balun, using the MAX2839AS Evaluation Kit.)

Rx EVM vs. P

IN

(CHANNEL BANDWIDTH = 10MHz,

64 QAM FUSC)

PIN (dBm)

EVM (%)

MAX2839ASWO+T toc09

-100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10

0

2

4

6

8

10

12

14

16

18

20

22

LNA = MAX

LNA = MAX

- 32dB

LNA = MAX

- 16dB

LNA = MAX

- 8dB

0 26.5

Rx EMISSION SPECTRUM AT LNA INPUT

(LNA = MAX GAIN)

MAX2839ASWO+T toc12

FREQUENCY (GHz)

(dBm)

-40

-45

-50

-55

-60

-65

-70

-75

-80

-85

-90

4/3 x LO

4 x LO

WiMAX EVM vs. OFDM JAMMER

(10MHz CHANNEL BANDWIDTH, 64 QAM FUSC)

P

WANTED

= P

SENSITIVITY

+ 3dB = -70.3dBm AT ANTENNA

(INCLUDING 4dB FRONT-END LOSS),

EVM AT P

14

f

12

SENSITIVITY

OFFSET

= 6.37%, WITHOUT JAMMER

=10MHz

Rx EVM vs. V

OUT

(CHANNEL BANDWIDTH = 10MHz,

64 QAM FUSC)

12

LNA = MAX

= -50dBm

P

IN

8

EVM (%)

4

0

-30 -26 -22 -18 -14 -10 -6
V

(dBV

RMS

)

OUT

MAX2839ASWO+T toc10

10

8

EVM (%)

6

4

f

= 20MHz

2

0

-70 -60 -50 -40 -30 -20
P

JAMMER

OFFSET

AT ANTENNA (dBm)

MAX2839ASWO+T toc11

MAX2839AS

2.3GHz to 2.7GHz MIMO Wireless
Broadband RF Transceiver

12 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V

CC_

= 2.8V, TA = +25°C, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω

unbalanced output of balun, using the MAX2839AS Evaluation Kit.)

RXINA± DIFFERENTIAL IMPEDANCE

55.8

55.6

55.4

55.2

55.0

REAL COMPONENT (Ω)

54.8

54.6

54.4

2.30 2.502.40 2.602.35 2.552.45 2.65 2.70

Rx INPUT RETURN LOSS vs. FREQUENCY

0

LNA = MAX GAIN

-5

-10

-15

-20

-25

Rx INPUT RETURN LOSS (dB)

-30
LNA = MAX - 16dB

-35

2300 2400 2500 26002350 2450 2550 2650 2700

vs. FREQUENCY

IMAGINARY

FREQUENCY (GHz)

LNA = MAX - 32dB

LNA = MAX - 8dB

FREQUENCY (MHz)

MAX2839ASWO+T toc13

REAL

-100

-105

-110

-115

-120

IMAGINARY COMPONENT (Ω)

-125

-130

MAX2839ASWO+T toc15

RXINB± DIFFERENTIAL IMPEDANCE

53.6

vs. FREQUENCY

53.4

53.2

53.0

52.8

52.6

REAL COMPONENT (Ω)

52.4

52.2

52.0

2.30 2.652.552.452.35 2.70

IMAGINARY

FREQUENCY (GHz)

MAX2839ASWO+T toc14

REAL

2.602.502.40

RSSI VOLTAGE vs. INPUT POWER

2.5

LNA = MAX

2.0
LNA = MAX - 8dB

1.5

1.0

RSSI VOLTAGE (V)

0.5

0

-110 -80 -50 -20 10

LNA = MAX - 16dB

LNA = MAX - 32dB

PIN (dBm)

-100

-105

-110

-115

-120

IMAGIANRY COMPONENT (Ω)

-125

-130

MAX2839ASWO+T toc16

Rx RSSI STEP RESPONSE

(-32dB SIGNAL STEP)

LNA GAIN
CONTROL

RSSI

200ns/div

MAX2839ASWO+T toc18

3V

0V

1.45V

0.45V

Rx RSSI STEP RESPONSE

(+32dB SIGNAL STEP)

LNA GAIN CONTROL

200ns/div

MAX2839ASWO+T toc17

3V

0V

1.45V

RSSI OUTPUT

0.45V