MAXIM MAX2839 Technical data

General Description

The MAX2839 direct conversion, zero-IF, RF transceiver
is designed specifically for 2GHz 802.16e MIMO mobile
WiMAX systems. The device incorporates one transmit­ter and two receivers, with >40dB isolation between
each receiver. The MAX2839 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 MAX2839 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 56-pin TQFN package
measuring 8mm x 8mm x 0.8mm.

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

♦ 2.3GHz to 2.7GHz Wideband Operation

♦ Dual Receivers for MIMO, Single Transmitter

♦ Complete RF Transceiver, PA Driver, and Crystal

Oscillator

2.3dB Rx Noise Figure on Each Receiver

-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 < 40Hz Step
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

♦ +2.7V to +3.6V Transceiver Supply

♦ Low-Power Shutdown Current

♦ Small, 56-Pin TQFN Package (8mm x 8mm x

0.8mm)

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

________________________________________________________________

Maxim Integrated Products

1

19-3218; Rev 1; 3/08

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.

WiMAX is a trademark of the WiMAX Forum.

SPI is a trademark of Motorola, Inc.

PART

TEMP RANGE

PIN­PACKAGE

PKG

CODE

MAX2839ETN+TD

T5688+2

Ordering Information

+

Denotes a lead-free package.

T = Tape and reel.

*

EP = Exposed paddle.

D = Dry pack.

Pin Configuration and Block Diagram/Typical Operating
Circuit appear at end of data sheet.

-40°C to +85°C 56 TQFN-EP*

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

2 _______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS TABLE

(MAX2839 Evaluation Kit, VCC_ = 2.7V to 3.6V, TA= -40°C to +85°C, Rx set to the maximum gain. RXTX set according to operating
mode, ENABLE = 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 rec-

ommended settings and corresponding test mode, unless otherwise noted. Typical values are at V

CC_

= 2.8V, fLO= 2.5GHz and

T

A

= +25°C, unless otherwise noted.) (Note 1)

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 +3.6V

RF Inputs: RXINA+, RXINA-, RXINB+,

RXINB- to GND .............................................AC-Coupled Only

RF Outputs: TXOUT+, TXOUT- to GND.................-0.3V to +3.6V

Analog Inputs: TXBBI+, TXBBI-, TXBBQ+,

TXBBQ- to GND..................................................-0.3V to +3.6V

Analog Input: REFCLK, XTAL1 .........................-0.3V to +3.6V

P-P

Analog Outputs: RXBBIA+, RXBBIA-, RXBBQA+, RXBBQA-,

RXBBIB+, RXBBIB-, RXBBQB+, RXBBQB-, CPOUT+,

CPOUT-, PABIAS, RSSI to GND.........................-0.3V to +3.6V

Digital Inputs: RXTX, CS, SCLK, DIN,

B0–B7, LOAD, RXHP, ENABLE to GND .............-0.3V to +3.6V

Digital Outputs: DOUT, CLKOUT ..........................-0.3V to +3.6V

Bias Voltages: VCOBYP .......................................-0.3V to +3.6V

Short-Circuit Duration on All Output Pins ...............................10s

RF Input Power: All RXIN_ ..............................................+15dBm

RF Output Differential Load VSWR: All TXOUT .......................6:1

Continuous Power Dissipation (T

A

= +70°C)

56-Pin TQFN (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

Lead Temperature (soldering, 10s) .................................+300°C

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: RXTX, ENABLE, SCLK, DIN, CS, B7:B0, LOAD, RXHP

Digital Input Voltage High, V

Digital Input Voltage Low, V

Digital Input Current High, I

PARAMETER CONDITIONS MIN TYP MAX UNITS

Shutdown mode, T

Clock-out only mode 1.4 3.5

Standby mode 32 45

Rx mode

Tx mode

Rx calibration mode, both receivers ON 153 195

Tx calibration mode 102 135

D9:D8 = 00 in A4:A0 = 00100 0.85 1.0 1.2

D9:D8 = 01 in A4:A0 = 00100 1.1

D9:D8 = 10 in A4:A0 = 00100 1.2

D9:D8 = 11 in A4:A0 = 00100 1.35

DC-coupled 0.5 1.2 V

IH

IL

IH

= +25°C 2 µA

A

One receiver ON 76 95

Both receivers ON 117 145

16 QAM 116

64 QAM (Note 4) 140 170

VCC -

0.4

0.4 V

-1 +1 µA

mA

V

V

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS TABLE (continued)

(MAX2839 Evaluation Kit, VCC_ = 2.7V to 3.6V, TA= -40°C to +85°C, Rx set to the maximum gain. RXTX set according to operating
mode, ENABLE = 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 rec-

ommended settings and corresponding test mode, unless otherwise noted. Typical values are at V

CC_

= 2.8V, fLO= 2.5GHz and

T

A

= +25°C, unless otherwise noted.) (Note 1)

AC ELECTRICAL CHARACTERISTICS TABLE—Rx MODE

(MAX2839 Evaluation Kit, V

CC_

= 2.8V, TA= +25°C, fRF= 2.4999GHz, fLO= 2.5GHz; baseband output signal frequency = 100kHz,

f

REF

= 40MHz, ENABLE = RXTX = CS = high, SCLK = DIN = low, with power matching for the differential RF pins using the typical

applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. Lowpass filter is set
to 10MHz RF channel BW. Unmodulated single tone RF input signal is used with specifications which normally apply over the entire
operating conditions, unless otherwise indicated.) (Note 1)

Digital Input Current Low, I

LOGIC OUTPUTS: DOUT, CLKOUT

Digital Output Voltage High, V

Digital Output Voltage Low, V

PARAMETER CONDITIONS MIN TYP MAX UNITS

IL

Sourcing 100µA

OH

Sinking 100µA 0.4 V

OL

V

-1 +1 µA

-

CC

0.4

V

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

Gain Change Settling Time

Baseband Gain Range

Baseband Gain Minimum Step
Size

DSB Noise Figure

PARAMETER CONDITIONS MIN TYP MAX UNITS

Tested at band edges and band center 0.8 dB

T

= -40°C to

A

+85°C

From max RF gain to max RF gain - 8dB 8

From max RF gain to max RF gain - 16dB 16RF Gain Steps

From max RF gain to max RF gain - 32dB 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) 2.3

V ol tag e g ai n = 50d B w i th m ax RF g ai n - 8d B ( B7:B6 = 01) 5.5

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

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

Maximum gain, B7:B0 = 0000000 90 99

Minimum gain, B7:B0 = 1111111 5 13

200

2000

= -40°C to +85°C

A

58 63 66 dB

1dB

13

27

dB

dB

ns

dB

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS TABLE—Rx MODE (continued)

(MAX2839 Evaluation Kit, V

CC_

= 2.8V, TA= +25°C, fRF= 2.4999GHz, fLO= 2.5GHz; baseband output signal frequency = 100kHz,

f

REF

= 40MHz, ENABLE = RXTX = CS = high, SCLK = DIN = low, with power matching for the differential RF pins using the typical

applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. Lowpass filter is set to
10MHz RF channel BW. Unmodulated single tone RF input signal is used with specifications which normally apply over the entire
operating conditions, unless otherwise indicated.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Out-of-Band Input IP3 (Note 2)

Inband Input P-1dB

Maximum Output Signal Level

I/Q Gain Imbalance 100kHz IQ baseband output; 1 σ variation 0.1 dB

I/Q Phase Error 100kHz IQ baseband output; 1 σ variation 0.125 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 any gain setting;
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 = 101000 programmed
through SPI

-5 0 +5 dB

-13

-9

-7

+16

1.5 V

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 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 75Baseband Filter Rejection

At > 40MHz 90

RXHP = 1 (used before AGC completion) 650

D5:D4 = 00 0.1

RXHP = 0 (used after AGC
completion) address A4:A0 = 01110

D5:D4 = 01 1

D5:D4 = 10 30

D5:D4 = 11 100

1 V/s

2mV

dB

kHz

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

_______________________________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS TABLE—Rx MODE (continued)

(MAX2839 Evaluation Kit, V

CC_

= 2.8V, TA= +25°C, fRF= 2.4999GHz, fLO= 2.5GHz; baseband output signal frequency = 100kHz,

f

REF

= 40MHz, ENABLE = RXTX = CS = high, SCLK = DIN = low, with power matching for the differential RF pins using the typical

applications circuit and registers set to default settings and corresponding test mode, unless otherwise noted. Lowpass filter is set to
10MHz RF channel BW. Unmodulated single tone RF input signal is used with specifications which normally apply over the entire
operating conditions, unless otherwise indicated.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

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 30 mV/dB

RSSI Output Settling Time To within 3dB of steady state

A4:A0 = 00100 serial bits D9:D6 = 0000 1.75

A4:A0 = 00100 serial bits D9:D6 = 0001 2.25

A4:A0 = 00100 serial bits D9:D6 = 0010 3.5

A4:A0 = 00100 serial bits D9:D6 = 0011 5.0

A4:A0 = 00100 serial bits D9:D6 = 0100 5.5

A4:A0 = 00100 serial bits D9:D6 = 0101 6.0

A4:A0 = 00100 serial bits D9:D6 = 0110 7.0

A4:A0 = 00100 serial bits D9:D6 = 0111 8.0

A4:A0 = 00100 serial bits D9:D6 = 1000 9.0

A4:A0 = 00100 serial bits D9:D6 = 1001 10.0

A4:A0 = 00100 serial bits D9:D6 = 1010 12.0

A4:A0 = 00100 serial bits D9:D6 = 1011 14.0

A4:A0 = 00100 serial bits D9:D6 = 1100 15.0

A4:A0 = 00100 serial bits D9:D6 = 1101 20.0

A4:A0 = 00100 serial bits D9:D6 = 1110 24.0

A4:A0 = 00100 serial bits D9:D6 = 1111 28.0

0 to 2.3MHz for BW = 5MHz 1.3

0 to 4.6MHz for BW = 10MHz 1.3

0 to 2.3MHz for BW = 5MHz 90

0 to 4.6MHz for BW = 10MHz 50

At 3.3MHz 6

At > 21MHz 85

At 6.7MHz 6

At > 41.6MHz 85

≥ 10kΩ 0.4 V

LOAD

≥ 10kΩ 2.2 V

LOAD

+32dB signal step 200

-32dB signal step 800

MHz

dB

ns

dB

dB

ns

P-P

P-P

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

6 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS TABLE—Tx MODE

(MAX2839 Evaluation Kit, V

CC_

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

REF

= 40MHz, ENABLE = CS = high, RXTX =

SCLK = DIN = low, with power matching for the differential RF pins using the typical applications and registers set to default settings
and corresponding test mode, unless otherwise noted. 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 1)

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 12 dB

Max Output Power over
Frequency for Any Given 200MHz
Band

PARAMETER CONDITIONS MIN TYP MAX UNITS

Output optimally matched over 200MHz RF BW 2.5 dB

64 QAM OFDM signal conforming to spectral emission
mask and -36dB EVM after I/Q imbalance calibration by
modem (Note 3)

0 dBm

RF Output Return Loss

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

Given 200MHz band in the 2.3GHz to 2.7GHz range, for
which the matching has been optimized

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
modern

Differential resistance 100 kΩ

Differential capacitance 0.5 pF

0 to 2.3MHz 0.2

At > 25MHz 80

0 to 4.6MHz 0.2

At > 41.6MHz 80

0 to 2.3MHz (BW = 5MHz) 20

0 to 4.6MHz (BW = 10MHz) 12

OUT

= 0dBm

8dB

45 dBc

-35 dBc

dB

dB

ns

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

_______________________________________________________________________________________ 7

AC ELECTRICAL CHARACTERISTICS TABLE—FREQUENCY SYNTHESIS

(MAX2839 Evaluation Kit, V

CC_

= 2.8V, TA= +25°C, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, SCLK = DIN = low, PLL 3dB loop noise

bandwidth = 120kHz. VCO and RF synthesis enabled, unless otherwise noted.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

RF Channel Center Frequency
Range

Channel Center Frequency
Programming Minimum Step Size

Charge-Pump Comparison
Frequency

Reference Frequency Range 11 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

2.3 2.7 GHz

39 Hz

11 40 MHz

AC-coupled to REFCLK pin 0.8 V

Resistance (REFCLK pin) 10 k

Capacitance (REFCLK pin) 1 pF

1 2 4

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

> 7MHz -80

f

OFFSET

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

-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, 1x drive setting 1.5 V

Output Clock Load Impedance
(R||C)

Relative to the ambient temperature T
VCO lock temperature range is within operating
temperature range

2

Resistance 10 k

Capacitance 2 pF

, as long as the

A

T

±40 °C

A

P-P

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

8 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS TABLE—MISCELLANEOUS BLOCKS

(MAX2839 Evaluation Kit, VCC= 2.8V, f

REF

= 40MHz, CS = high, SCLK = DIN = low, and TA= +25°C, unless otherwise noted.) (Note 1)

AC ELECTRICAL CHARACTERISTICS TABLE—TIMING

(MAX2839 Evaluation Kit, V

CC_

= 2.8V, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, SCLK = DIN = low, 3dB PLL noise bandwidth =

120kHz, and T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

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

Excludes programmable delay of 0 to 7μs in steps of

0.5μs

Maximum capacitance, A4:A0 = 11000, D6:D0 =
1111111

Minimum capacitance, A4:A0 = 11000, D6:D0 =
0000000

Readout at DOUT pin through SPI
A4:A0 = 01011, D4:D0

TA = +25°C 01111

TA = +85°C 11101

= -40°C 00001

T

A

200 ns

15.5

0.5

0.12 pF

pF

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)

TRANSMITTER AND RECEIVER PARALLEL GAIN CONTROL

LOAD Rising Edge Setup Time B7:B0 stable to LOAD rising edge 10 ns

LOAD Rising Edge Hold Time LOAD rising edge to B7:B0 stable 10 ns

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

2µs

2µs

µs

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

_______________________________________________________________________________________ 9

AC ELECTRICAL CHARACTERISTICS TABLE—TIMING (continued)

(MAX2839 Evaluation Kit, V

CC_

= 2.8V, fLO= 2.5GHz, f

REF

= 40MHz, CS = high, SCLK = DIN = low, 3dB PLL noise bandwidth =

120kHz, and T

A

= +25°C, unless otherwise noted.) (Note 1)

Note 1: 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 register settings are not production tested. Load register setting 500ns after
V

CC

is applied.

Note 2: Two tones at +20MHz and +39MHz offset with -35dBm/tone. Measure IM3 at 1MHz.
Note 3: Gain adjusted over max gain and max gain -3dB. Optimally matched over given 200MHz band.
Note 4: 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.

LOAD Falling Edge Setup Time B7:B0 stable to LOAD falling edge 10 ns

LOAD Falling Edge Hold Time LOAD falling edge to B7:B0 stable 10 ns

LOAD Rise and Fall Time Between 10% and 90% of static levels 100 ns

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

45 MHz

0.1/f

CLK

0.1/f

CLK

12.5 ns

ns

ns

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

10 ______________________________________________________________________________________

Typical Operating Characteristics

(VCC= 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 MAX2839 Evalutation Kit.)

SINGLE RX SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

MAX2839 toc01

2.7 3.0 3.3 3.6

60

65

70

75

80

85

90

TA = -40°C

TA = +25°C

TA = +85°C

DUAL RX SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

MAX2839 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

NOISE FIGURE

vs. BASEBAND GAIN SETTING

BASEBAND VGA CODE

NOISE FIGURE (dB)

MAX2839 toc03

0 9 18 27 36 45 54 63

0

10

20

30

40

50

LNA = MAX

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 32dB

RX VOLTAGE GAIN vs. FREQUENCY

FREQUENCY (MHz)

GAIN (dB)

MAX2839 toc04

2300 2380 2460 2540 2620 2700

40

50

60

70

80

90

100

110

LNA = MAX

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 32dB

RX VOLTAGE GAIN

vs. FREQUENCY (MAXIMUM LNA GAIN)

FREQUENCY (MHz)

GAIN (dB)

MAX2939 toc05

2300 2380 2460 2540 2620 2700

95

97

99

101

103

TA = -40°C

TA = +25°C

TA = +85°C

RX VOLTAGE GAIN

vs. BASEBAND GAIN SETTING

BASEBAND VGA CODE

VOLTAGE GAIN (dB)

MAX2839 toc06

0 9 18 27 36 45 54 63

0

40

80

120

LNA = MAX

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 32dB

RX OUTPUT V

1dB

vs. GAIN SETTING

BASEBAND VGA CODE

OUTPUT V

1dB

(V

RMS

)

MAX2839 toc07

0 9 18 27 36 45 54 63

0

0.4

0.8

1.2

1.6

RX ISOLATION vs. LNA GAIN SETTING

LNA GAIN SETTING (dB)

RECEIVER ISOLATION (dB)

MAX2839 toc08

-35 -25 -15 -5 5

30

35

40

45

50

LNA = MAX

LNA = MAX - 8dB

LNA = MAX - 16dB

LNA = MAX - 32dB

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________

11

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

RX EVM vs. P

IN

(CHANNEL BANDWIDTH = 10MHz,

64 QAM FUSC)

PIN (dBm)

EVM (%)

MAX2839 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

RX EVM vs. V

OUT

(CHANNEL BANDWIDTH = 10MHz,

64 QAM FUSC)

V

OUT

(dBV

RMS

)

EVM (%)

MAX2839 toc10

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

0

4

8

12

LNA = MAX
P

IN

= -50dBm

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

SENSITIVITY

= 6.37%, WITHOUT JAMMER.

P

JAMMER

AT ANTENNA (dBm)

EVM (%)

MAX2839 toc11

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

0

2

4

6

8

10

12

14

f

OFFSET

=10MHz

f

OFFSET

= 20MHz

-130

-110

-120

-90

-100

-70

-80

-60

-40

-50

-30

0 26.5G

RX EMISSION SPECTRUM AT LNA INPUT

(TX OFF, LNA GAIN = MAX)

MAX2839 toc12

FREQUENCY (Hz)

(dB)

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

12 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

RX A INPUT DIFFERENTIAL IMPEDANCE

vs. FREQUENCY

35.40

35.10

34.80

34.50

REAL COMPONENT (Ω)

34.20

33.90

2.3 2.52,4 2.6 2.7

IMAGINARY

FREQUENCY (GHz)

RX B INPUT DIFFERENTIAL IMPEDANCE

REAL

MAX2839 toc13

-69.0

-73.0

-77.0

-81.0

-85.0

-89.0

34.80

vs. FREQUENCY

34.70

34.60

34.50

34.40

34.30

34.20

34.10

IMAGINARY COMPONENT (Ω)

REAL COMPONENT (Ω)

34.00

33.90

33.80

2.3 2.7

IMAGINARY

FREQUENCY (GHz)

MAX2839 toc14

REAL

2.62.52.4

-66.0

-68.0

-70.0

-72.0

-74.0

-76.0

-78.0

-80.0

-82.0

-84.0

-86.0

IMAGIANRY COMPONENT (Ω)

RX INPUT RETURN LOSS vs. FREQUENCY

0

-10

-20

-30

-40

-50

RX INPUT RETURN LOSS (dB)

-60

-70

LNA = MAX - 8dB

2300 2400 2500 2600 2700

LNA = MAX - 32dB

LNA = MAX - 16dB

LNA = MAX

FREQUENCY (MHz)

RX RSSI STEP RESPONSE

(+32dB SIGNAL STEP)

3V

LNA GAIN CONTROL

0V

1.45V

RSSI OUTPUT

0.45V

MAX2839 toc17

MAX2839 toc15

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)

RX RSSI STEP RESPONSE

(-32dB SIGNAL STEP)

3V

0V

1.45V

0.45V

LNA GAIN
CONTROL

RSSI

MAX2839 toc16

MAX2839 toc18

200ns/div

200ns/div

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________

13

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

RX LPF GROUP DELAY

vs. FREQUENCY

350

300

250

200

150

CHANNEL BW = 5MHz

CHANNEL BW = 8MHz

CHANNEL BW = 9MHz

CHANNEL BW = 10MHz

RX DC OFFSET SETTLING RESPONSE

(+8dB BB VGA GAIN STEP)

2V/div

MAX2839 toc19

0V

0V

VGA GAIN
CONTROL

MAX2839 toc20

RX DC OFFSET SETTLING RESPONSE

2V/div

(-8dB BB VGA GAIN STEP)

0V

0V

VGA GAIN
CONTROL

MAX2839 toc21

100

LPF GROUP DELAY (ns)

50

0

0246810121416

FREQUENCY (MHz)

RX DC OFFSET SETTLING RESPONSE

(-16dB BB VGA GAIN STEP)

2V/div

0V

0V

5mV/div

VGA GAIN
CONTROL

10μs/div

RX BB VGA SETTLING RESPONSE

(-8dB BB VGA GAIN STEP)

2V/div

VGA GAIN CONTROL

MAX2839 toc22

MAX2839 toc25

5mV/div

2V/div

5mV/div

2V/div

10μs/div

RX DC OFFSET SETTLING RESPONSE

(-32dB BB VGA GAIN STEP)

0V

0V

VGA GAIN
CONTROL

10μs/div

RX BB VGA SETTLING RESPONSE

(-16dB BB VGA GAIN STEP)

VGA GAIN CONTROL

MAX2839 toc23

MAX2839 toc26

5mV/div

2V/div

0V

1V/div

2V/div

10μs/div

RX BB VGA SETTLING RESPONSE

(+8dB BB VGA GAIN STEP)

VGA GAIN CONTROL

200ns/div

MAX2839 toc24

RX BB VGA SETTLING RESPONSE

(-32dB BB VGA GAIN STEP)

VGA GAIN CONTROL

MAX2839 toc27

1V/div

0V

200ns/div

1V/div

0V

200ns/div

0V

1V/div

200ns/div

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

14 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

RX LNA SETTLING RESPONSE

(MAX TO MAX - 8dB)

2V/div

LNA GAIN CONTROL

MAX2839 toc28

0V

1V/div

200ns/div

RX LNA SETTLING RESPONSE

2V/div

1V/div

(MAX TO MAX - 32dB)

LNA GAIN CONTROL

0V

200ns/div

MAX2839 toc29

RESPONSE (dB)

RX BB FREQUENCY RESPONSE

10

0

-10

-20

CHANNEL BW
= 1.5MHz

-30
CHANNEL BW

-40

= 5MHz

-50

CHANNEL BW
= 10MHz

-60

-70

0.1 1 10 100
FREQUENCY (MHz)

CHANNEL BW = 28MHz

MAX2839 toc30

RX BB FREQUENCY RESPONSE

2

1

0

-1

CHANNEL BW
= 1.5MHz

-2

-3

RESPONSE (dB)

CHANNEL BW
= 5MHz

-4

CHANNEL BW

-5

= 10MHz

-6

0.1 1 10 100
FREQUENCY (MHz)

HISTOGRAM: RX STATIC DC OFFSET

996

MEAN = 0
DEV = 0.23981mV

830

SAMPLE SIZE = 7841

664

498

332

CHANNEL BW
= 28MHz

MAX2839 toc31

MAX2839 toc34

200mV/div

HISTOGRAM: IQ GAIN IMBALANCE

474

395

316

237

158

79

SAMPLE SIZE = 7839

1σ/div

POWER-ON DC OFFSET CANCELLATION

WITH INPUT SIGNAL

5V/div

ENABLE

0V

MEAN = 0

DEV = 51.8mV

MAX2839 toc35

MAX2839 toc32

HISTOGRAM: RX PHASE IMBALANCE

774

MEAN = 0
DEV = 0.11878°

645

SAMPLE SIZE = 7841

516

387

258

129

1σ/div

POWER-ON DC OFFSET CANCELLATION

WITHOUT INPUT SIGNAL

5V/div

ENABLE

0V

10mV/div

MAX2839 toc33

MAX2839 toc36

I/Q OUTPUT

166

1σ/div

VGA CODE = -36
LNA GAIN = MAX

1μs/div

I/Q OUTPUT

VGA CODE = -36
LNA GAIN = MAX

1μs/div

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________

15

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

TX SUPPLY CURRENT vs. SUPPLY VOLTAGE

150

146

142

138

SUPPLY CURRENT (mA)

134

130

2.7 3.0 3.3 3.6

TA = +85°C

TA = +25°C

SUPPLY VOLTAGE (V)

TA = -40°C

TX OUTPUT POWER vs. FREQUENCY

4

3

2

TA = -40°C

1

TA = +25°C

(dBm)

0

OUT

P

-1

-2

-3

-4
2300 2350 2400 2450 2500 2550 2600 2650 2700

TX GAIN SET TO MAX - 3dB

TA = +85°C

FREQUENCY (MHz)

MAX2839 toc37

MAX2839 toc40

TX BASEBAND FREQUENCY RESPONSE

10

0

-10

CHANNEL BW

-20
= 1.5MHz

-30
CHANNEL BW
= 5MHz

-40

RESPONSE (dB)

CHANNEL BW

-50
= 10MHz

-60

-70

0.1 1 10 100
FREQUENCY (MHz)

CHANNEL BW

= 28MHz

TX OUTPUT POWER vs. GAIN SETTING

10

-10

(dBm)

-30

OUT

P

TA = +85°C

-50

-70
0 16324864

TA = -40°C

TA = +25°C

TX GAIN CODE

TX BASEBAND FREQUENCY RESPONSE

2

MAX2839 toc38

1

0

-1

CHANNEL BW

-2
= 1.5MHz

-3

RESPONSE (dB)

CHANNEL BW
= 5MHz

-4
CHANNEL BW

-5

= 10MHz

-6

0.1 1 10 100

CHANNEL BW = 28MHz

FREQUENCY (MHz)

TX OUTPUT SPECTRUM

(10MHz CHANNEL BANDWIDTH, 16 QAM FUSC)

-70dBr

P

= 0dBm

MAX2839 toc41

10dB/div

OUT

0dBr

2.495GHz 2.5GHz 2.555GHz

MAX2839 toc39

MAX2839 toc42

MASK

(10MHz CHANNEL BANDWIDTH, 64 QAM FUSC)

TX OUTPUT SPECTRUM

-70dBr
P

= 0dBm

OUT

10dB/div

0dBr

2.495GHz 2.5GHz 2.555GHz

MASK

MAX2839 toc43

CARRIER LEAKAGE (dBc)

TX CARRIER LEAKAGE vs. FREQUENCY

-30

-35

-40

-45

TA = +85°C

-50

-55

-60
2300 2350 2400 2450 2500 2550 2600 2650 2700

TX GAIN SET TO MAX - 3dB

TA = -40°C

TA = +25°C

FREQUENCY (MHz)

TX CARRIER LEAKAGE vs. GAIN SETTING

-20

-25

MAX2839 toc44

-30

-35

-40

-45

-50

-55

CARRIER LEAKAGE (dBc)

-60

-65

-70

TA = +85°C

TA = -40°C

TA = +25°C

0 9 18 27 36 45 54 63

TX GAIN CODE

MAX2839 toc45

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

16 ______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

TX SIDEBAND LEVEL vs. FREQUENCY

-30

-35

-40

-45

-50

-55

-60

-65

SIDEBAND LEVEL (dBc)

-70

TA = +25°C

-75

-80
2300 2350 2400 2450 2500 2550 2600 2650 2700

TX GAIN SET TO MAX - 3dB

TA = +85°C

TA = -40°C

FREQUENCY (MHz)

EVM vs. TX OUTPUT POWER

(64 QAM FUSC, 10MHz CHANNEL BANDWIDTH)

3.0

2.5

MAX2839 toc47

2.0

1.5

EVM (%)

1.0

0.5

0

-50 -40 -30 -20 -10 0
P

(dBm)

OUT

MAX2839 toc46

SIDEBAND LEVEL (dBc)

TX SIDEBAND LEVEL vs. GAIN SETTING

-30

-40

TA = +85°C

-50

-60

-70

-80
0 9 18 27 36 45 54 63

TA = -40°C

TX GAIN CODE

TA = +25°C

MAX2839 toc48

TX OUTPUT EMISSION SPECTRUM

0

-10

-20

-30

-40

-50

(dBm)

-60

-70

-80

-90

-100
0Hz 26.5GHz

TX OUTPUT RETURN LOSS vs. FREQUENCY

25dB

5dB/div

-25dB
2GHz 3GHz

FREQUENCY

RBW = 200kHz

MAX2839 toc49

MAX2839 toc52

372

MEAN = -46.235dBc
DEV = 5.1577dB

310

SAMPLE SIZE = 7841

248

186

124

62

1σ/div

LO FREQUENCY vs.

DIFFERENTIAL TUNE VOLTAGE

2.8

2.7

2.6

2.5

2.4

LO FREQUENCY (GHz)

2.3

2.2

2.1

-1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5
DIFFERENTIAL TUNE VOLTAGE (V)

HISTOGRAM: TX LO LEAKAGE

504

420

MAX2839 toc50

336

252

168

84

-50

-60

MAX2839 toc53

-70

-80

-90

-100

-110

-120

PHASE NOISE (dBc/Hz)

-130

-140

-150

HISTOGRAM: TX SIDEBAND SUPPRESSION

MEAN = -47.856dBc
DEV = 2.8827dB
SAMPLE SIZE = 7841

1σ/div

PHASE NOISE vs. OFFSET FREQUENCY

0.0001 0.001 0.01

OFFSET FREQUENCY (MHz)

0.1 1 10

MAX2839 toc51

MAX2839 toc54

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________

17

(μs)

Typical Operating Characteristics (continued)

(VCC= 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 MAX2839 Evalutation Kit.)

VCO GAIN vs. DIFFERENTIAL TUNE VOLTAGE

80

60

40

VCO GAIN (MHz/V)

20

0

-1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 2.5
DIFFERENTIAL TUNE VOLTAGE (V)

CHANNEL-SWITCHING FREQUENCY SETTLING

(2.3GHz TO 2.7GHz,

MANUAL VCO SUB-BAND SELECTION)

100kHz

CHANNEL-SWITCHING FREQUENCY SETTLING

(2.3GHz TO 2.7GHz,

AUTOMATIC VCO SUB-BAND SELECTION)

100kHz

MAX2839 toc55

20kHz/div

-100kHz

0

MAX2839 toc58

TIME (ms)

CHANNEL-SWITCHING FREQUENCY SETTLING

(2.7GHz TO 2.3GHz,

AUTOMATIC VCO SUB-BAND SELECTION)

100kHz

MAX2839 toc56

20kHz/div

-100kHz

1.498

0

TIME (ms)

CHANNEL-SWITCHING FREQUENCY SETTLING

(2.7GHz TO 2.3GHz,

MANUAL VCO SUB-BAND SELECTION)

100kHz

MAX2839 toc57

1.498

MAX2839 toc59

20kHz/div

-100kHz

2V/div

10kHz/div

0

TIME (μs)

TX-TO-RX TURNAROUND FREQUENCY

GLITCH SETTLING

TX TO RX SWITCHING

FREQUENCY ERROR

1μs/div

MAX2839 toc60

199.89

20kHz/div

-100kHz

2V/div

10kHz/div

0

TIME

RX-TO-TX TURNAROUND FREQUENCY

GLITCHING SETTLING

RX TO TX SWITCHING

FREQUENCY ERROR

1μs/div

MAX2839 toc61

199.89

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

18 ______________________________________________________________________________________

Pin Description

PIN NAME FUNCTION

1 GNDRXLNA_A Receiver A LNA Ground

2 VCCRXLNA_A Receiver A LNA Supply Voltage. Bypass with a 22pF capacitor as close as possible to the pin.

3 B0 Receiver Gain-Control Logic Input Bit 0

4 LOAD

5 VCCRXLNA_B Receiver B LNA Supply Voltage. Bypass with a 22pF capacitor as close as possible to the pin.

6 GNDRXLNA_B Receiver B LNA Ground

7 RXINB+

8 RXINB-

9 B4 Receiver and Transmitter Gain-Control Logic Input Bit 4

10 B3 Receiver and Transmitter Gain-Control Logic Input Bit 3

11 VCCTXPAD Supply Voltage for Transmitter PA Driver. Bypass with a 22pF capacitor as close as possible to the pin.

12 B2 Receiver and Transmitter Gain-Control Logic Input Bit 2

13 TXOUT+

14 TXOUT-

15 B1 Receiver and Transmitter Gain-Control Logic Input Bit 1

16 B5 Receiver and Transmitter Gain-Control Logic Input Bit 5

17 PABIAS Transmit External PA Bias DAC Output

18 VCCTXMX Transmitter Upconverter Supply Voltage. Bypass with a 22pF capacitor as close as possible to the pin.

19 SCLK Serial-Clock Logic Input of 4-Wire Serial Interface

20 ENABLE Transceiver Enable

21 CLKOUT Reference Clock Buffer Output

22 REFCLK Crystal or Reference Clock Input. AC-couple a crystal or a reference clock to this analog input.

23 XTAL1 XTAL Input. Connect the other terminal of the XTAL to this pin.

24 VCCXTAL Crystal Oscillator Supply Voltage. Bypass with a 100nF capacitor as close as possible to the pin.

25 VCCCP PLL Charge-Pump Supply Voltage. Bypass with a 100nF capacitor as close as possible to the pin.

26 GNDCP Charge-Pump Circuit Ground

27 CPOUT+

28 CPOUT-

29 GNDVCO VCO Ground

30 VCOBYP

31 VCCVCO VCO Supply Voltage. Bypass with a 22nF capacitor as close as possible to the pin.
32 CS Chip-Select Logic Input of 4-Wire Serial Interface

33 DOUT Data Logic Output of 4-Wire Serial Interface

34 DIN Data Logic Input of 4-Wire Serial Interface

35 RXBBIB-

36 RXBBIB+

37 RXBBQB-

38 RXBBQB+

Receiver Gain Select. Positive edge trigger latches digital gain inputs B0–B7 to receive A. Negative
edge trigger latches digital gain inputs B0–B7 to receive B.

Receiver B LNA Differential Input. Input is internally DC-coupled.

Power Amplifier Driver Differential Output. The pins have internal AC blocking capacitors.

Differential Charge-Pump Output. Connect the frequency synthesizer’s loop filter between these pins
(see the Typical Operating Circuit).

On-Chip VCO Regulator Output Bypass. Bypass with a 1µF capacitor to GND. Do not connect other
circuitry to this pin.

Receiver B Baseband I-Channel Differential Outputs

Receiver B Baseband Q-Channel Differential Outputs

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________ 19

Pin Description (continued)

PIN NAME FUNCTION

39 RSSI Receiver Signal Strength Output

40 B7 Receiver Gain-Control Logic Input Bit 7

41 B6 Receiver and Transmitter Gain-Control Logic Input Bit 6

42 RXHP

43 RXBBQA-

44 RXBBQA+

45 RXBBIA-

46 RXBBIA+

47 VCCRXVGA Receiver VGA Supply Voltage. Bypass with a 100nF capacitor as close as possible to the pin.

48 VCCRXFL Recei ver Baseb and Fi l ter S up p l y V ol tag e. Byp ass w i th a 100nF cap aci tor as cl ose as p ossi b l e to the p i n.

49 TXBBI-

50 TXBBI+

51 TXBBQ+

52 TXBBQ-

53 VCCRXMX

54 RXTX Receive/Transmit Mode Enable

55 RXINA-

56 RXINA+

—EP

Receiver Baseband AC-Coupling Highpass Corner Frequency Control Logic Input. For typical WiMAX
application, connect pin to ground.

Receiver Baseband Q-Channel Differential Outputs

Receiver A Baseband I-Channel Differential Outputs

Transmitter Baseband I-Channel Differential Inputs

Transmitter Baseband Q-Channel Differential Inputs

Receiver Downconverters Supply Voltage. Bypass with a 22pF capacitor as close as possible to the
pin.

Receiver A LNA Differential Input. Input is internally DC-coupled.

Exposed Paddle. Internally connected to GND. Connect to a large ground plane for optimum RF
performance and enhanced thermal dissipation. Not intended as an electrical connection point.

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

20 ______________________________________________________________________________________

Detailed Description

Modes of Operation

The modes of operation for the MAX2839 are shutdown,
clock-out only, standby, receive, transmit, transmitter
calibration and receiver calibration. See Table 1 for a
summary of the modes of operation. When the parts are
active, various blocks can be shutdown individually by
programming different SPI registers.

Shutdown Mode

The MAX2839 features a low-power shutdown mode. In
shutdown mode, all circuit blocks are powered down,
except the 4-wire serial bus and its internal programma­ble registers.

Clock-Out Only

In clock-out mode, the entire transceiver is off except
the divided reference clock output on the CLKOUT pin
and the clock divider, which remains on.

Standby Mode

The standby mode is used to enable the frequency
synthesizer block while the rest of the device is pow­ered down. In this mode, PLL, VCO, and LO generator

are on so that Tx or Rx modes can be quickly enabled
from this mode. These and other blocks can be selec­tively enabled in this mode by programming different
SPI registers.

Receive (Rx) Mode

In receive mode, all Rx circuit blocks are powered on
and active. Antenna signal is applied; RF is downcon­verted, filtered, and buffered at Rx BB I and Q outputs.
Either receiver A or both receivers can be enabled.
Receiver B cannot be enabled by itself.

Transmit (Tx) Mode

In transmit mode, all Tx circuit blocks are powered on.
The external PA is powered on after a programmable
delay using the on-chip PA bias DAC.

Transmitter (Tx) Calibration Mode

All Tx circuit blocks except PA driver and external PA
are powered on and active. The AM detector and
receiver I/Q channel buffers are also ON, along with
multiplexers in receiver side to route this AM detector’s
signal to each I and Q differential outputs.

Table 1. Operating Mode

MODE CONTROL LOGIC INPUTS CIRCUIT BLOCK STATES

MODE

Shutdown 0 0 X XX Off Off Off None Off

Clock-Out Only 1 X X X0 Off Off Off None On

Clock-Out Only X 1 X X0 Off Off Off None On

Standby 0 1 X 01 Off Off On or Off None On

Rx (1x2 MIMO) 1 1 1 01 On Off On None On

Rx (1x1 SISO) 1 1 0 01 On (RxA) Off On None On

Tx 1 0 X 01 Off On On None On

Tx Calibration 1 0 X 11 Off

ENABLE

PIN

RXTX

PIN

SPI

REG1

D<3>

SPI

REG16

D<1:0>

Rx PATH Tx PATH

On (except

PA driver)

PLL, VCO, LO

GEN

On

CALIBRATION
SECTIONS ON

AM detector + Rx

I, Q buffers

CLOCK

OUTPUT

On

RxA Calibration
(Loopback)

RxB Calibration
(Loopback)

1 1 0 11

1 1 1 11

(except

(except

On

LNA)

On

LNA)

On (except

PA driver)

On (except

PA driver)

On Loopback On

On Loopback On

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________ 21

Receiver (Rx) Calibration or Loopback

Part of Rx and Tx circuit blocks except LNA and PA dri­ver are powered on and active. The transmitter I/Q
input signals are upconverted to RF, and the output of
the Tx gain control block (VGA) is fed to the receiver at
the input of the downconverter. Either receiver A or
both receivers can be connected to the transmitter and
powered on. The I/Q lowpass filters are not present in
the transmitter signal path (they are bypassed).

Programmable Registers

and 4-Wire SPI Interface

The MAX2839 includes 32 programmable 16-bit regis­ters. The most significant bit (MSB) is the read/write
selection bit. The next 5 bits are register address. The

10 least significant bits (LSBs) are register data.
Register data is loaded through the 4-wire
SPI/MICROWIRE™-compatible serial interface. Data at
DIN is shifted in MSB first and is framed by CS. When
CS is low, the clock is active, and input data is shifted
at the rising edge of the clock. During the read mode,
register data selected by address bits is shifted out to
DOUT at the falling edges of the clock. At the CS rising
edge, the 10-bit data bits are latched into the register
selected by address bits. See Figure 1. The register
values are preserved in shutdown mode as long as the
power-supply voltage is maintained. However, every
time the power-supply voltage is turned on, the regis­ters are reset to the default values.

Figure 1. 4-Wire SPI Serial-Interface Timing Diagram

MICROWIRE is a trademark of National Semiconductor Corp.

DOUT

DIN

SCLK

BIT 1

BIT 2

DON'T CARE

BIT 6

BIT 14 BIT 13 BIT 5

t

CS

DOUT

DIN

SCLK

CS

t

CSO

t

CSS

BIT 1

DS

BIT 2

t

DH

DON'T CARE

SPI REGISTER WRITE

BIT 5

SPI REGISTER READ

t

CSW

BIT 14

t

CS1

t

CH

t

CL

t

CSH

BIT 6

t

D

BIT 13

DON'T CARE

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

22 ______________________________________________________________________________________

Block Diagram/Typical Operating Circuit

Rx A INPUT

Rx B INPUT

Tx OUTPUT

Rx GAIN

CONTROL

Rx GAIN
SELECT

Rx/Tx GAIN

CONTROL

Rx/Tx GAIN

CONTROL

Rx/Tx GAIN

CONTROL

GNDRXLNA_A

VCCRXLNA_A

LOAD

VCCRXLNA_B

GNDRXLNA_B

RXINB+

RXINB-

VCCTXPAD

TXOUT+

TXOUT-

MODE

CONTROL

RXTX

RXINA-

RXINA+

56 55 54 53 52 51 50 49 48 47 46 45 44 43

VCCRXMX

TXBBQ-

Tx INPUTS

TXBBQ+

TXBBI+

TXBBI-

VCCRXFL

VCCRXVGA

RXBBIA+

Rx A OUTPUTS

RXBBIA-

RXBBQA+

RXBBQA-

+

42

41

40

39

38

37

36

35

34

33

32

31

30

29

RXHP

B6

B7

RSSI

RXBBQB+

RXBBQB-

RXBBIB+

RXBBIB-

DIN

DOUT

CS

VCCVCO

VCOBYP

GNDVCO

TEMP

SENSOR

IMUX

QMUX

RSSI

RSSI

MUX

QMUX

IMUX

SERIAL

INTERFACE

SCLK

÷

PLL

1

2

B0

3

4

5

MAX2839

6

7

8

B4

9

B3

10

11

B2

12

13

14

IMUX/QMUX

AM

DETECTOR

SERIAL

INTERFACE

÷

90°

0°

CRYSTAL

OSCILLATOR/

BUFFER

Rx BASBAND
HPF CONTROL

Rx/Tx GAIN
CONTROL

Rx GAIN
CONTROL

Rx B
OUTPUTS

SERIAL
INPUT
SERIAL
OUTPUT

SERIAL
INPUT

15 16 17 18 19 20 21 22 23 24 25 26 27 28

B5

B1

Rx/Tx GAIN

CONTROL

PABIAS

VCCTXMX

SERIAL

INPUT

SCLK

ENABLE

MODE

CONTROL

REFERENCE

CLKOUT

CLOCK

OUTPUT

REFCLK

XTAL1

VCCCP

GNDCP

VCCXTAL

CPOUT+

PLL

FILTER

CPOUT-

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________ 23

Chip Information

PROCESS: BiCMOS

Pin Configuration

GNDRXLNA_A

VCCRXLNA_A

LOAD

VCCRXLNA_B

GNDRXLNA_B

RXINB+

RXINB-

VCCTXPAD

VCCRXFL

TXBBI-

TXBBI+

TXBBQ+

TXBBQ-

VCCRXMX

RXTX

RXINA-

RXINA+

56 55 54 53 52 51 50 49 48 47 46 45 44 43

+

1

2

B0

3

4

5

6

7

8

9

B4

10

B3

11

MAX2839

VCCRXVGA

RXBBIA+

RXBBIA-

RXBBQA+

RXBBQA-

42

41

40

39

38

37

36

35

34

33

32

RXHP

B6

B7

RSSI

RXBBQB+

RXBBQB-

RXBBIB+

RXBBIB-

DIN

DOUT

CS

B2

TXOUT+

TXOUT-

*EP = EXPOSED PAD.

12

13

14

*EP

15 16 17 18 19 20 21 22 23 24 25 26 27 28

B5

B1

PABIAS

VCCTXMX

SCLK

ENABLE

CLKOUT

TQFN

REFCLK

XTAL1

VCCXTAL

VCCCP

GNDCP

31

VCCVCO

VCOBYP

30

GNDVCO

29

CPOUT-

CPOUT+

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

24 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

56L THIN QFN.EPS

PACKAGE OUTLINE
56L THIN QFN, 8x8x0.8mm

21-0135

1

F

2

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

______________________________________________________________________________________ 25

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages

.)

PACKAGE OUTLINE
56L THIN QFN, 8x8x0.8mm

21-0135

2

F

2

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

26

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

Revision History

REVISION

NUMBER

0 2/08 Init ial release —

1 3/08 Corrected Ordering Information and pin 42 in Pin Description 1, 19

REVISION

DATE

DESCRIPTION

PAGES

CHANGED