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

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

= +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

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

= +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

= +25°C 2 µA

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

MAX2839

2.3GHz to 2.7GHz MIMO Wireless Broadband RF Transceiver

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS TABLE (continued)

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

= +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,

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

Sourcing 100µA

Sinking 100µA 0.4 V

-1 +1 µA

0.4

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

= -40°C to

+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

58 63 66 dB

1dB

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,

REF

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

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

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

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,

REF

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

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

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

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

= 0 to 1.8MHz -40

OFFSET

= 1.8MHz to 7MHz -70

OFFSET

> 7MHz -80

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

Resistance 10 k

Capacitance 2 pF

, as long as the

±40 °C

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

= +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

200 ns

15.5

0.5

0.12 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

µs

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