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
s
s
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
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