MAXIM MAX2839ETN+TD

19-3218; Rev 1; 3/08
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
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
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)
802.16e Mobile WiMAX™ Systems
Ordering Information
Korean WIBRO Systems
Proprietary Wireless Broadband Systems
802.11g or n WLAN with MRC or MIMO Down Link
PART
TEMP RANGE
PINPACKAGE
MAX2839ETN+TD -40°C to +85°C 56 TQFN-EP*
PKG
CODE
T5688+2
+Denotes a lead-free package.
T = Tape and reel.
*EP = Exposed paddle.
D = Dry pack.
WiMAX is a trademark of the WiMAX Forum.
SPI is a trademark of Motorola, Inc.
Pin Configuration and Block Diagram/Typical Operating
Circuit appear at end of data sheet.
________________________________________________________________ Maxim Integrated Products
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.
1
MAX2839
General Description
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
ABSOLUTE MAXIMUM RATINGS
VCC_ 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 +3.6VP-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 (TA = +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
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
CAUTION! ESD SENSITIVE DEVICE
DC ELECTRICAL CHARACTERISTICS 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.
90mVRMS differential I and Q signals (1MHz) applied to I, Q baseband inputs of transmitter in transmit mode, all registers set to recommended settings and corresponding test mode, unless otherwise noted. Typical values are at VCC_ = 2.8V, fLO = 2.5GHz and
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage
CONDITIONS
VCC_
MIN
2.7
Shutdown mode, TA = +25°C
Tx mode
32
45
95
Both receivers ON
117
145
16 QAM
116
Tx calibration mode
D9:D8 = 00 in A4:A0 = 00100
0.85
140
170
153
195
102
135
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
Tx Baseband Input CommonMode Voltage Operating Range
DC-coupled
Tx Baseband Input Bias Current
Source current
0.5
10
V
3.5
76
64 QAM (Note 4)
UNITS
µA
One receiver ON
Rx calibration mode, both receivers ON
Rx I/Q Output Common-Mode
Voltage
3.6
1.4
Standby mode
Rx mode
MAX
2
Clock-out only mode
Supply Current
TYP
mA
V
1.2
V
20
µA
LOGIC INPUTS: RXTX, ENABLE, SCLK, DIN, CS, B7:B0, LOAD, RXHP
Digital Input Voltage High, VIH
VCC 0.4
Digital Input Voltage Low, VIL
Digital Input Current High, IIH
2
-1
_______________________________________________________________________________________
V
0.4
V
+1
µA
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
(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.
90mVRMS differential I and Q signals (1MHz) applied to I, Q baseband inputs of transmitter in transmit mode, all registers set to recommended settings and corresponding test mode, unless otherwise noted. Typical values are at VCC_ = 2.8V, fLO = 2.5GHz and
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
Digital Input Current Low, IIL
MIN
TYP
-1
MAX
UNITS
+1
µA
LOGIC OUTPUTS: DOUT, CLKOUT
Digital Output Voltage High, VOH
Sourcing 100µA
Digital Output Voltage Low, VOL
Sinking 100µA
VCC 0.4
V
0.4
V
AC ELECTRICAL CHARACTERISTICS TABLE—Rx MODE
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.4999GHz, fLO = 2.5GHz; baseband output signal frequency = 100kHz,
fREF = 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
2.7
GHz
RF INPUT TO I, Q BASEBAND-LOADED OUTPUT
RF Input Frequency Range
Peak-to-Peak Gain Variation over
RF Input Frequency Range
2.3
Tested at band edges and band center
RF Input Return Loss
All LNA settings
Total Voltage Gain
TA = -40°C to
+85°C
RF Gain Steps
Maximum gain, B7:B0 = 0000000
90
Minimum gain, B7:B0 = 1111111
0.8
dB
12
dB
99
5
From max RF gain to max RF gain - 8dB
8
From max RF gain to max RF gain - 16dB
16
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
200
Any RF or baseband gain change; gain settling to within
±0.1dB of steady state; RXHP = 1
2000
13
dB
Gain Change Settling Time
Baseband Gain Range
ns
From maximum baseband gain (B5:B0 = 000000) to
minimum gain (B5:B0 = 111111), TA = -40°C to +85°C
Baseband Gain Minimum Step
Size
DSB Noise Figure
dB
58
63
1
Voltage gain = 65dB with max RF gain (B7:B6 = 00)
2.3
Voltage gain = 50dB with max RF gain - 8dB (B7:B6 = 01)
5.5
Voltage gain = 45dB with max RF gain - 16dB
(B7:B6 = 10)
13
Voltage gain = 15dB with max RF gain - 32dB
(B7:B6 = 11)
27
66
dB
dB
dB
_______________________________________________________________________________________
3
MAX2839
DC ELECTRICAL CHARACTERISTICS TABLE (continued)
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
AC ELECTRICAL CHARACTERISTICS TABLE—Rx MODE (continued)
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.4999GHz, fLO = 2.5GHz; baseband output signal frequency = 100kHz,
fREF = 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
AGC set for -65dBm wanted signal, max RF gain
(B7:B6 = 00)
-13
AGC set for -55dBm wanted signal, max RF gain - 8dB
(B7:B6 = 01)
-9
AGC set for -40dBm wanted signal, max RF gain - 16dB
(B7:B6 = 10)
-7
AGC set for -30dBm wanted signal, max RF gain - 32dB
(B7:B6 = 11)
+16
MAX
UNITS
dBm
Out-of-Band Input IP3 (Note 2)
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
Maximum Output Signal Level
Over passband frequency range; at any gain setting;
1dB compression point
1.5
VP-P
I/Q Gain Imbalance
100kHz IQ baseband output; 1 σ variation
0.1
dB
0.125
Degrees
Inband Input P-1dB
I/Q Phase Error
100kHz IQ baseband output; 1 σ variation
Rx I/Q Output Load Impedance
(R || C)
Minimum differential resistance
dBm
10
kΩ
Maximum differential capacitance
5
pF
+5
dB
Loopback Gain (for Receiver I/Q
Calibration)
Transmitter I/Q input to receiver I/Q output; transmitter
B6:B1 = 000011, receiver B5:B0 = 101000 programmed
through SPI
I/Q Output DC Droop
After switching RXHP to 0; average over 1µs after any
gain change, or 2µs after receive enabled with 100Hz
AC-coupling
1
V/s
I/Q Static DC Offset
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
2
mV
Isolation Between Rx Channels A
and B
Any RF gain settings
40
dB
At 15MHz
57
At 20MHz
75
At > 40MHz
90
RXHP = 1 (used before AGC completion)
650
-5
0
RECEIVER BASEBAND FILTERS
Baseband Filter Rejection
Baseband Highpass Filter Corner
Frequency
4
RXHP = 0 (used after AGC
completion) address A4:A0 = 01110
D5:D4 = 00
0.1
D5:D4 = 01
1
D5:D4 = 10
30
D5:D4 = 11
100
_______________________________________________________________________________________
dB
kHz
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.4999GHz, fLO = 2.5GHz; baseband output signal frequency = 100kHz,
fREF = 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
RF Channel BW Supported by
Baseband Filter
Baseband Gain Ripple
Baseband Group Delay Ripple
CONDITIONS
MIN
TYP
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
MAX
UNITS
MHz
dBP-P
nsP-P
Baseband Filter Rejection for
5MHz RF Channel BW
At 3.3MHz
6
At > 21MHz
85
Baseband Filter Rejection for
10MHz RF Channel BW
At 6.7MHz
6
At > 41.6MHz
85
RSSI Minimum Output Voltage
RLOAD ≥ 10kΩ
0.4
RSSI Maximum Output Voltage
RLOAD ≥ 10kΩ
2.2
V
30
mV/dB
dB
dB
RSSI
RSSI Slope
RSSI Output Settling Time
To within 3dB of steady state
+32dB signal step
200
-32dB signal step
800
V
ns
_______________________________________________________________________________________
5
MAX2839
AC ELECTRICAL CHARACTERISTICS TABLE—Rx MODE (continued)
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
AC ELECTRICAL CHARACTERISTICS TABLE—Tx MODE
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fRF = 2.501GHz, fLO = 2.5GHz, fREF = 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 90mVRMS cosine and
sine signals applied to I/Q baseband inputs of transmitter (differential DC coupled)). (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
2.7
GHz
Tx BASEBAND I/Q INPUTS TO RF OUTPUTS
RF Output Frequency Range
2.3
Peak-to-Peak Peak Gain Variation
over RF Band
Output optimally matched over 200MHz RF BW
2.5
dB
Total Voltage Gain
Max gain -3dB; at unbalanced 50Ω matched output
12
dB
Max Output Power over
64 QAM OFDM signal conforming to spectral emission
Frequency for Any Given 200MHz mask and -36dB EVM after I/Q imbalance calibration by
Band
modem (Note 3)
0
dBm
RF Output Return Loss
Given 200MHz band in the 2.3GHz to 2.7GHz range, for
which the matching has been optimized
8
dB
RF Gain Control Range
B6:B1 = 000000 to 111111
62
dB
Unwanted Sideband Suppression
Without calibration by modem, and excludes modem I/Q
imbalance; POUT = 0dBm
45
dBc
B1
1
B2
2
B3
4
B4
8
B5
16
B6
32
Relative to 0dBm output power; without calibration by
modern
-35
dBc
Differential resistance
100
kΩ
pF
RF Gain Control Binary Weights
Carrier Leakage
Tx I/Q Input Impedance (R||C)
Differential capacitance
0.5
Baseband Frequency Response
for 5MHz RF Channel BW
0 to 2.3MHz
0.2
At > 25MHz
80
Baseband Frequency Response
for 10MHz RF Channel BW
0 to 4.6MHz
0.2
At > 41.6MHz
80
0 to 2.3MHz (BW = 5MHz)
20
0 to 4.6MHz (BW = 10MHz)
12
Baseband Group Delay Ripple
6
_______________________________________________________________________________________
dB
dB
ns
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
(MAX2839 Evaluation Kit, VCC_ = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, SCLK = DIN = low, PLL 3dB loop noise
bandwidth = 120kHz. VCO and RF synthesis enabled, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
RF Channel Center Frequency
Range
MIN
TYP
2.3
Channel Center Frequency
Programming Minimum Step Size
Reference Frequency Range
11
40
Charge-Pump Output Current
Close-In Spur Level
80
0.8
MHz
VP-P
Resistance (REFCLK pin)
10
k
Capacitance (REFCLK pin)
1
pF
Programmable Reference Divider
Values
Closed-Loop Integrated Phase
Noise
GHz
MHz
40
Reference Frequency Input
Impedance (R||C)
2.7
Hz
11
AC-coupled to REFCLK pin
UNITS
39
Charge-Pump Comparison
Frequency
Reference Frequency Input
Levels
MAX
1
Integrate phase noise from 200Hz to 5MHz; chargepump comparison frequency = 40MHz
2
4
-39
dBc
On each differential side
0.8
mA
fOFFSET = 0 to 1.8MHz
-40
fOFFSET = 1.8MHz to 7MHz
-70
fOFFSET > 7MHz
-80
Reference Spur Level
dBc
-85
dBc
Turnaround LO Frequency Error
Relative to steady state; measured 35μs after Tx-Rx or
Rx-Tx switching instant, and 4μs after any receiver gain
changes
±50
Hz
Temperature Range Over Which
VCO Maintains Lock
Relative to the ambient temperature TA, as long as the
VCO lock temperature range is within operating
temperature range
TA ±40
°C
Reference Output Clock Divider
Values
2
Output Clock Drive Level
20MHz output, 1x drive setting
1.5
VP-P
Output Clock Load Impedance
(R||C)
Resistance
10
k
Capacitance
2
pF
_______________________________________________________________________________________
7
MAX2839
AC ELECTRICAL CHARACTERISTICS TABLE—FREQUENCY SYNTHESIS
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
AC ELECTRICAL CHARACTERISTICS TABLE—MISCELLANEOUS BLOCKS
(MAX2839 Evaluation Kit, VCC = 2.8V, fREF = 40MHz, CS = high, SCLK = DIN = low, and TA = +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
Excludes programmable delay of 0 to 7μs in steps of
0.5μs
Turn-On Time
200
ns
Maximum capacitance, A4:A0 = 11000, D6:D0 =
1111111
15.5
CRYSTAL OSCILLATOR
On-Chip Tuning Capacitance
Range
pF
Minimum capacitance, A4:A0 = 11000, D6:D0 =
0000000
0.5
On-Chip Tuning Capacitance
Step Size
0.12
pF
ON-CHIP TEMPERATURE SENSOR
Digital Output Code
Readout at DOUT pin through SPI
A4:A0 = 01011, D4:D0
TA = +25°C
01111
TA = +85°C
11101
TA = -40°C
00001
AC ELECTRICAL CHARACTERISTICS TABLE—TIMING
(MAX2839 Evaluation Kit, VCC_ = 2.8V, fLO = 2.5GHz, fREF = 40MHz, CS = high, SCLK = DIN = low, 3dB PLL noise bandwidth =
120kHz, and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SYSTEM TIMING
Turnaround Time
Measured from Tx or
Rx enable edge;
signal settling to
within 2dB of steady
state
Rx to Tx
2
Tx to Rx, RXHP = 1
2
µs
Tx Turn-On Time
(from Standby Mode)
Measured from Tx-enable edge; signal
settling to within 2dB of steady state
Tx Turn-Off Time
(to Standby Mode)
From Tx-disable edge
Rx Turn-On Time
(from Standby Mode)
Measured from Rx-enable edge; signal
settling to within 2dB of steady state
Rx Turn-Off Time
(to Standby Mode)
From Rx-disable edge
2
µs
0.1
µs
2
µs
0.1
µs
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
8
_______________________________________________________________________________________
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
(MAX2839 Evaluation Kit, VCC_ = 2.8V, fLO = 2.5GHz, fREF = 40MHz, CS = high, SCLK = DIN = low, 3dB PLL noise bandwidth =
120kHz, and TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
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
tCSO
6
ns
Falling Edge of CS to Rising
Edge of First SCLK Time
tCSS
6
ns
DIN to SCLK Setup Time
tDS
6
ns
DIN to SCLK Hold Time
tDH
6
ns
SCLK Pulse-Width High
tCH
6
ns
SCLK Pulse-Width Low
tCL
6
ns
Last Rising Edge of SCLK to
Rising Edge of CS or Clock to
Load Enable Setup Time
tCSH
6
ns
CS High Pulse Width
tCSW
20
ns
Time Between Rising Edge of CS
and the Next Rising Edge of
SCLK
tCS1
6
ns
Clock Frequency
fCLK
45
MHz
Rise Time
tR
0.1/fCLK
ns
Fall Time
tF
0.1/fCLK
ns
SCLK Falling Edge to Valid DOUT
tD
12.5
ns
Note 1: Min/max limits are production tested at TA = +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
VCC 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.
_______________________________________________________________________________________
9
MAX2839
AC ELECTRICAL CHARACTERISTICS TABLE—TIMING (continued)
Typical Operating Characteristics
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
TA = -40°C
120
110
TA = +25°C
TA = -40°C
100
3.0
3.3
SUPPLY VOLTAGE (V)
2.7
3.6
103
MAX2839 toc04
LNA = MAX
100
TA = -40°C
MAX2839 toc03
9
60
99
TA = +25°C
80
LNA = MAX
40
97
LNA = MAX - 32dB
LNA = MAX - 16dB
50
TA = +85°C
40
LNA = MAX - 32dB
0
95
2300
2380
2460
2540
FREQUENCY (MHz)
2620
2700
2300
2380
2460
2540
FREQUENCY (MHz)
2620
9
18
27
36
45
BASEBAND VGA CODE
RX ISOLATION vs. LNA GAIN SETTING
50
MAX2839 toc07
LNA = MAX - 8dB
RECEIVER ISOLATION (dB)
1.2
OUTPUT V1dB (VRMS)
0
2700
RX OUTPUT V1dB vs. GAIN SETTING
1.6
0.8
0.4
LNA = MAX - 32dB
45
40
LNA = MAX - 16dB
LNA = MAX
35
30
0
0
9
18
27
36
45
BASEBAND VGA CODE
54
63
LNA = MAX - 8dB
VOLTAGE GAIN (dB)
GAIN (dB)
LNA = MAX - 16dB
70
54
120
LNA = MAX - 8dB
80
18
27
36
45
BASEBAND VGA CODE
RX VOLTAGE GAIN
vs. BASEBAND GAIN SETTING
101
90
10
LNA = MAX
0
3.6
RX VOLTAGE GAIN
vs. FREQUENCY (MAXIMUM LNA GAIN)
RX VOLTAGE GAIN vs. FREQUENCY
110
3.0
3.3
SUPPLY VOLTAGE (V)
MAX2939 toc05
2.7
LNA = MAX - 8dB
0
80
60
LNA = MAX - 16dB
20
10
90
65
LNA = MAX - 32dB
30
MAX2839 toc06
TA = +25°C
40
MAX2839 toc08
75
70
130
NOISE FIGURE (dB)
80
50
MAX2839 toc02
TA = +85°C
TA = +85°C
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
85
140
MAX2839 toc01
90
NOISE FIGURE
vs. BASEBAND GAIN SETTING
DUAL RX SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SINGLE RX SUPPLY CURRENT
vs. SUPPLY VOLTAGE
GAIN (dB)
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
63
-35
-25
-15
-5
LNA GAIN SETTING (dB)
______________________________________________________________________________________
5
54
63
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
RX EVM vs. VOUT
(CHANNEL BANDWIDTH = 10MHz,
64 QAM FUSC)
RX EVM vs. PIN
(CHANNEL BANDWIDTH = 10MHz,
64 QAM FUSC)
18
12
MAX2839 toc10
LNA = MAX
LNA = MAX
- 8dB
- 16dB
20
MAX2839 toc09
22
LNA = MAX
PIN = -50dBm
16
EVM (%)
EVM (%)
8
LNA = MAX
- 32dB
14
12
10
8
4
6
4
0
LNA = MAX
0
-30
-100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10
PIN (dBm)
WiMAX EVM vs. OFDM JAMMER
(10MHz CHANNEL BANDWIDTH, 64 QAM FUSC)
PWANTED = PSENSITIVITY + 3dB = -70.3dBm AT ANTENNA
(INCLUDING 4dB FRONT-END LOSS).
EVM AT PSENSITIVITY = 6.37%, WITHOUT JAMMER.
12
fOFFSET =10MHz
-30
-40
-50
10
-10
-6
-60
-70
8
(dB)
EVM (%)
-22
-18
-14
VOUT (dBVRMS)
RX EMISSION SPECTRUM AT LNA INPUT
(TX OFF, LNA GAIN = MAX)
MAX2839 toc11
14
-26
MAX2839 toc12
2
-80
6
-90
4
-100
-110
fOFFSET = 20MHz
2
-120
-130
0
-70
-60
-50
-40
-30
PJAMMER AT ANTENNA (dBm)
-20
0
26.5G
FREQUENCY (Hz)
______________________________________________________________________________________
11
MAX2839
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
RX B INPUT DIFFERENTIAL IMPEDANCE
vs. FREQUENCY
MAX2839 toc13
35.40
MAX2839 toc14
34.80
-69.0
-66.0
-68.0
-73.0
IMAGINARY
34.80
-77.0
34.50
-81.0
REAL
34.20
-85.0
IMAGINARY
34.60
REAL COMPONENT (Ω)
REAL COMPONENT (Ω)
35.10
IMAGINARY COMPONENT (Ω)
34.70
-70.0
34.50
-72.0
34.40
-74.0
34.30
-76.0
34.20
-78.0
34.10
-80.0
-82.0
34.00
33.90
33.90
33.80
-89.0
2,4
2.5
2.6
-86.0
2.3
2.7
2.4
2.5
FREQUENCY (GHz)
FREQUENCY (GHz)
RX INPUT RETURN LOSS vs. FREQUENCY
RSSI VOLTAGE vs. INPUT POWER
2.5
MAX2839 toc15
0
LNA = MAX - 32dB
-10
LNA = MAX
2.0
-20
RSSI VOLTAGE (V)
LNA = MAX - 8dB
LNA = MAX - 8dB
-30
LNA = MAX - 16dB
-40
-50
1.5
1.0
LNA = MAX
LNA = MAX - 16dB
0.5
-60
LNA = MAX - 32dB
-70
2300
2400
2500
2600
FREQUENCY (MHz)
2700
0
-110
-80
-50
PIN (dBm)
-20
RX RSSI STEP RESPONSE
(-32dB SIGNAL STEP)
RX RSSI STEP RESPONSE
(+32dB SIGNAL STEP)
MAX2839 toc18
MAX2839 toc17
3V
3V
LNA GAIN
CONTROL
LNA GAIN CONTROL
0V
0V
1.45V
1.45V
RSSI OUTPUT
RSSI
0.45V
0.45V
200ns/div
12
2.7
2.6
MAX2839 toc16
2.3
-84.0
REAL
200ns/div
______________________________________________________________________________________
10
IMAGIANRY COMPONENT (Ω)
RX A INPUT DIFFERENTIAL IMPEDANCE
vs. FREQUENCY
RX INPUT RETURN LOSS (dB)
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
RX LPF GROUP DELAY
vs. FREQUENCY
MAX2839 toc21
MAX2839 toc20
MAX2839 toc19
350
CHANNEL BW = 5MHz
300
LPF GROUP DELAY (ns)
RX DC OFFSET SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)
RX DC OFFSET SETTLING RESPONSE
(+8dB BB VGA GAIN STEP)
CHANNEL BW = 8MHz
0V
CHANNEL BW = 9MHz
250
200
CHANNEL BW = 10MHz
2V/div
2V/div
VGA GAIN
CONTROL
0V
0V
0V
5mV/div
5mV/div
VGA GAIN
CONTROL
150
100
50
0
0
2
4
6
8
10 12
FREQUENCY (MHz)
14
16
0V
MAX2839 toc24
MAX2839 toc23
MAX2839 toc22
2V/div
2V/div
VGA GAIN
CONTROL
RX BB VGA SETTLING RESPONSE
(+8dB BB VGA GAIN STEP)
RX DC OFFSET SETTLING RESPONSE
(-32dB BB VGA GAIN STEP)
RX DC OFFSET SETTLING RESPONSE
(-16dB BB VGA GAIN STEP)
2V/div
10μs/div
10μs/div
0V
VGA GAIN CONTROL
VGA GAIN
CONTROL
0V
0V
5mV/div
0V
1V/div
5mV/div
10μs/div
10μs/div
200ns/div
RX BB VGA SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)
RX BB VGA SETTLING RESPONSE
(-16dB BB VGA GAIN STEP)
RX BB VGA SETTLING RESPONSE
(-32dB BB VGA GAIN STEP)
MAX2839 toc25
2V/div
MAX2839 toc27
MAX2839 toc26
2V/div
2V/div
VGA GAIN CONTROL
VGA GAIN CONTROL
VGA GAIN CONTROL
0V
0V
1V/div
1V/div
0V
1V/div
200ns/div
200ns/div
200ns/div
______________________________________________________________________________________
13
MAX2839
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 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 - 32dB)
MAX2839 toc28
RX BB FREQUENCY RESPONSE
MAX2839 toc29
10
CHANNEL BW = 28MHz
2V/div
2V/div
0
LNA GAIN CONTROL
LNA GAIN CONTROL
MAX2839 toc30
RX LNA SETTLING RESPONSE
(MAX TO MAX - 8dB)
0V
0V
1V/div
1V/div
RESPONSE (dB)
-10
-20
CHANNEL BW
= 1.5MHz
-30
-40
CHANNEL BW
= 5MHz
-50
CHANNEL BW
= 10MHz
-60
-70
200ns/div
CHANNEL BW
= 28MHz
-1
-2
-3
-4
-5
CHANNEL BW
= 1.5MHz
CHANNEL BW
= 5MHz
CHANNEL BW
= 10MHz
MEAN = 0
DEV = 51.8mV
SAMPLE SIZE = 7839
395
MAX2839 toc32
MAX2839 toc31
1
474
1
10
FREQUENCY (MHz)
100
HISTOGRAM: RX PHASE IMBALANCE
HISTOGRAM: IQ GAIN IMBALANCE
RX BB FREQUENCY RESPONSE
2
0
0.1
774
645
316
516
237
387
158
258
79
129
MAX2839 toc33
200ns/div
RESPONSE (dB)
MEAN = 0
DEV = 0.11878°
SAMPLE SIZE = 7841
-6
0.1
1
10
FREQUENCY (MHz)
HISTOGRAM: RX STATIC DC OFFSET
996
830
1σ/div
1σ/div
POWER-ON DC OFFSET CANCELLATION
WITH INPUT SIGNAL
POWER-ON DC OFFSET CANCELLATION
WITHOUT INPUT SIGNAL
100
5V/div
5V/div
ENABLE
664
ENABLE
0V
0V
498
200mV/div
332
I/Q OUTPUT
10mV/div
166
VGA CODE = -36
LNA GAIN = MAX
1σ/div
14
MAX2839 toc36
MAX2839 toc35
MEAN = 0
DEV = 0.23981mV
SAMPLE SIZE = 7841
MAX2839 toc34
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
I/Q OUTPUT
1μs/div
VGA CODE = -36
LNA GAIN = MAX
1μs/div
______________________________________________________________________________________
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
TX BASEBAND FREQUENCY RESPONSE
TA = -40°C
CHANNEL BW
= 1.5MHz
-20
-30
CHANNEL BW
= 5MHz
-40
CHANNEL BW
= 10MHz
-50
134
3.0
3.3
SUPPLY VOLTAGE (V)
TX OUTPUT POWER vs. FREQUENCY
3
TA = +25°C
-1
-2
1
10
FREQUENCY (MHz)
MAX2839 toc39
100
TX OUTPUT SPECTRUM
(10MHz CHANNEL BANDWIDTH, 16 QAM FUSC)
-70dBr
POUT = 0dBm
10dB/div
TA = +25°C
-30
MASK
TA = +85°C
0dBr
TA = +85°C
-4
-70
0
TX OUTPUT SPECTRUM
(10MHz CHANNEL BANDWIDTH, 64 QAM FUSC)
0dBr
TA = -40°C
-40
-45
-50
TA = +85°C
-30
TA = -40°C
TA = +85°C
-35
-40
-45
-50
-55
TA = +25°C
-65
-70
-60
2.555GHz
-25
-60
-55
2.5GHz
2.555GHz
-20
MAX2839 toc44
TX GAIN SET TO MAX - 3dB
-35
2.5GHz
TX CARRIER LEAKAGE vs. GAIN SETTING
TA = +25°C
2.495GHz
2.495GHz
64
CARRIER LEAKAGE (dBc)
10dB/div
48
TX CARRIER LEAKAGE vs. FREQUENCY
CARRIER LEAKAGE (dBc)
MASK
32
TX GAIN CODE
-30
MAX2839 toc43
POUT = 0dBm
16
MAX2839 toc45
2300 2350 2400 2450 2500 2550 2600 2650 2700
FREQUENCY (MHz)
-70dBr
CHANNEL BW
= 10MHz
0.1
-50
-3
CHANNEL BW
= 5MHz
TA = -40°C
-10
TA = -40°C
1
0
10
POUT (dBm)
POUT (dBm)
2
-3
100
MAX2839 toc41
TX GAIN SET TO MAX - 3dB
1
10
FREQUENCY (MHz)
TX OUTPUT POWER vs. GAIN SETTING
MAX2839 toc40
4
CHANNEL BW
= 1.5MHz
-6
0.1
3.6
-2
-5
-70
2.7
-1
-4
-60
130
CHANNEL BW = 28MHz
0
RESPONSE (dB)
RESPONSE (dB)
142
TA = +25°C
1
-10
TA = +85°C
138
CHANNEL BW
= 28MHz
0
TX BASEBAND FREQUENCY RESPONSE
2
MAX2839 toc38
MAX2839 toc37
146
SUPPLY CURRENT (mA)
10
MAX2839 toc42
TX SUPPLY CURRENT vs. SUPPLY VOLTAGE
150
2300 2350 2400 2450 2500 2550 2600 2650 2700
FREQUENCY (MHz)
0
9
18
27
36
45
TX GAIN CODE
54
______________________________________________________________________________________
63
15
MAX2839
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
-45
-50
-55
-60
TA = -40°C
-65
-70
-40
TA = +25°C
MAX2839 toc47
TA = +85°C
3.0
TA = +85°C
2.5
2.0
-50
EVM (%)
SIDEBAND LEVEL (dBc)
-40
-30
SIDEBAND LEVEL (dBc)
TX GAIN SET TO MAX - 3dB
-35
MAX2839 toc46
-30
EVM vs. TX OUTPUT POWER
(64 QAM FUSC, 10MHz CHANNEL BANDWIDTH)
TX SIDEBAND LEVEL vs. GAIN SETTING
MAX2839 toc48
TX SIDEBAND LEVEL vs. FREQUENCY
-60
1.5
1.0
-70
TA = -40°C
TA = +25°C
0.5
-75
0
-80
2300 2350 2400 2450 2500 2550 2600 2650 2700
FREQUENCY (MHz)
0
54
-50
63
310
-30
MEAN = -46.235dBc
DEV = 5.1577dB
SAMPLE SIZE = 7841
-40
-30
-20
POUT (dBm)
-10
0
HISTOGRAM: TX SIDEBAND SUPPRESSION
504
MAX2839 toc50
RBW = 200kHz
-20
27
36
45
TX GAIN CODE
372
MAX2839 toc49
0
18
HISTOGRAM: TX LO LEAKAGE
TX OUTPUT EMISSION SPECTRUM
-10
9
420
248
336
186
252
124
168
62
84
MAX2839 toc51
-80
MEAN = -47.856dBc
DEV = 2.8827dB
SAMPLE SIZE = 7841
-40
(dBm)
-50
-60
-70
-80
-90
-100
LO FREQUENCY vs.
DIFFERENTIAL TUNE VOLTAGE
2.8
2.7
2.6
-60
-70
PHASE NOISE (dBc/Hz)
LO FREQUENCY (GHz)
5dB/div
PHASE NOISE vs. OFFSET FREQUENCY
-50
2.5
2.4
2.3
MAX2839 toc54
TX OUTPUT RETURN LOSS vs. FREQUENCY
25dB
1σ/div
1σ/div
26.5GHz
MAX2839 toc53
0Hz
MAX2839 toc52
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
-80
-90
-100
-110
-120
-130
2.2
3GHz
FREQUENCY
16
-140
2.1
-25dB
2GHz
-1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0
DIFFERENTIAL TUNE VOLTAGE (V)
2.5
-150
0.0001
0.001
0.01
0.1
OFFSET FREQUENCY (MHz)
______________________________________________________________________________________
1
10
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
100kHz
MAX2839 toc56
MAX2839 toc55
100kHz
MAX2839 toc57
VCO GAIN vs. DIFFERENTIAL TUNE VOLTAGE
80
CHANNEL-SWITCHING FREQUENCY SETTLING
(2.7GHz TO 2.3GHz,
AUTOMATIC VCO SUB-BAND SELECTION)
CHANNEL-SWITCHING FREQUENCY SETTLING
(2.3GHz TO 2.7GHz,
AUTOMATIC VCO SUB-BAND SELECTION)
20kHz/div
20kHz/div
40
20
-100kHz
0
2.5
-100kHz
0
1.498
0
1.498
TIME (ms)
TIME (ms)
CHANNEL-SWITCHING FREQUENCY SETTLING
(2.3GHz TO 2.7GHz,
MANUAL VCO SUB-BAND SELECTION)
MAX2839 toc58
100kHz
CHANNEL-SWITCHING FREQUENCY SETTLING
(2.7GHz TO 2.3GHz,
MANUAL VCO SUB-BAND SELECTION)
100kHz
20kHz/div
MAX2839 toc59
-1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0
DIFFERENTIAL TUNE VOLTAGE (V)
20kHz/div
VCO GAIN (MHz/V)
60
-100kHz
-100kHz
0
199.89
0
TIME (μs)
199.89
TIME (μs)
TX-TO-RX TURNAROUND FREQUENCY
GLITCH SETTLING
RX-TO-TX TURNAROUND FREQUENCY
GLITCHING SETTLING
MAX2839 toc60
2V/div
TX TO RX SWITCHING
MAX2839 toc61
2V/div
RX TO TX SWITCHING
10kHz/div
FREQUENCY ERROR
1μs/div
10kHz/div
FREQUENCY ERROR
1μs/div
______________________________________________________________________________________
17
MAX2839
Typical Operating Characteristics (continued)
(VCC = 2.8V, TA = +25°C, fLO = 2.5GHz, fREF = 40MHz, CS = high, RXHP = SCLK = DIN = low, RF BW = 10MHz, Tx output at 50Ω
unbalanced output of balun, using the MAX2839 Evalutation Kit.)
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
MAX2839
Pin Description
PIN
18
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
4
LOAD
Receiver Gain-Control Logic Input Bit 0
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.
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-
Receiver B LNA Differential Input. Input is internally DC-coupled.
9
B4
Receiver and Transmitter Gain-Control Logic Input Bit 4
10
B3
Receiver and Transmitter Gain-Control Logic Input Bit 3
11
VCCTXPAD
12
B2
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
18
VCCTXMX
Supply Voltage for Transmitter PA Driver. Bypass with a 22pF capacitor as close as possible to the pin.
Receiver and Transmitter Gain-Control Logic Input Bit 2
Power Amplifier Driver Differential Output. The pins have internal AC blocking capacitors.
Transmit External PA Bias DAC Output
Transmitter Upconverter Supply Voltage. Bypass with a 22pF capacitor as close as possible to the pin.
19
SCLK
20
ENABLE
Serial-Clock Logic Input of 4-Wire Serial Interface
Transceiver Enable
21
CLKOUT
Reference Clock Buffer Output
22
REFCLK
23
XTAL1
24
VCCXTAL
Crystal or Reference Clock Input. AC-couple a crystal or a reference clock to this analog input.
XTAL Input. Connect the other terminal of the XTAL to this pin.
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-
Differential Charge-Pump Output. Connect the frequency synthesizer’s loop filter between these pins
(see the Typical Operating Circuit).
29
GNDVCO
30
VCOBYP
31
VCCVCO
32
CS
33
DOUT
34
DIN
35
RXBBIB-
36
RXBBIB+
37
RXBBQB-
38
RXBBQB+
VCO Ground
On-Chip VCO Regulator Output Bypass. Bypass with a 1µF capacitor to GND. Do not connect other
circuitry to this pin.
VCO Supply Voltage. Bypass with a 22nF capacitor as close as possible to the pin.
Chip-Select Logic Input of 4-Wire Serial Interface
Data Logic Output of 4-Wire Serial Interface
Data Logic Input of 4-Wire Serial Interface
Receiver B Baseband I-Channel Differential Outputs
Receiver B Baseband Q-Channel Differential Outputs
______________________________________________________________________________________
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
PIN
NAME
39
RSSI
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
48
VCCRXFL
49
TXBBI-
50
TXBBI+
51
TXBBQ+
52
TXBBQ-
53
VCCRXMX
54
RXTX
55
RXINA-
56
RXINA+
—
EP
FUNCTION
Receiver Signal Strength Output
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
Receiver VGA Supply Voltage. Bypass with a 100nF capacitor as close as possible to the pin.
Receiver Baseband Filter Supply Voltage. Bypass with a 100nF capacitor as close as possible to the pin.
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.
Receive/Transmit Mode Enable
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.
______________________________________________________________________________________
19
MAX2839
Pin Description (continued)
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
Table 1. Operating Mode
MODE CONTROL LOGIC INPUTS
MODE
ENABLE
PIN
RXTX
PIN
SPI
REG1
D<3>
SPI
REG16
D<1:0>
CIRCUIT BLOCK STATES
Rx PATH
Tx PATH
PLL, VCO, LO
GEN
CALIBRATION
SECTIONS ON
CLOCK
OUTPUT
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
On (except
PA driver)
On
AM detector + Rx
I, Q buffers
On
RxA Calibration
(Loopback)
1
1
0
11
On
(except
LNA)
On (except
PA driver)
On
Loopback
On
RxB Calibration
(Loopback)
1
1
1
11
On
(except
LNA)
On (except
PA driver)
On
Loopback
On
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
20
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.
______________________________________________________________________________________
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
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.
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
DON'T CARE
DOUT
BIT 1
DIN
BIT 2
BIT 5
BIT 13
BIT 6
BIT 14
SCLK
tCS1
tCH
tDS
CS
tCL
tCSO
tDH
tCSS
tCSH
tCSW
SPI REGISTER WRITE
DON'T CARE
DOUT
BIT 6
BIT 13
BIT 14
tD
DIN
BIT 1
BIT 2
BIT 5
DON'T CARE
SCLK
CS
SPI REGISTER READ
Figure 1. 4-Wire SPI Serial-Interface Timing Diagram
MICROWIRE is a trademark of National Semiconductor Corp.
______________________________________________________________________________________
21
MAX2839
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).
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
MAX2839
Block Diagram/Typical Operating Circuit
Rx A INPUT
56
55
54
53
52
51
50
49
48
47
46
45
RXBBQA-
RXBBQA+
RXBBIA-
RXBBIA+
VCCRXVGA
VCCRXFL
Rx A OUTPUTS
TXBBI-
TXBBI+
TXBBQ+
TXBBQ-
Tx INPUTS
VCCRXMX
RXTX
RXINA-
RXINA+
MODE
CONTROL
44
43
+
B2
TXOUT+
TXOUT-
IMUX
8
35
9
10
SERIAL
INTERFACE
TEMP
SENSOR
IMUX/QMUX
AM
DETECTOR
90°
34
33
SCLK
11
32
0°
12
31
13
SERIAL
INTERFACE
14
B1
15
16
Rx/Tx GAIN
CONTROL
17
18
19
÷
20
21
CRYSTAL
OSCILLATOR/
BUFFER
22
MODE
CONTROL
SERIAL
INPUT
23
30
÷
PLL
29
24
25
26
27
RXHP
Rx BASBAND
HPF CONTROL
B6
Rx/Tx GAIN
CONTROL
Rx GAIN
CONTROL
B7
RSSI
RXBBQB+
RXBBQBRXBBIB+
DIN
DOUT
CS
VCCVCO
VCOBYP
GNDVCO
28
PLL
FILTER
REFERENCE
CLOCK
OUTPUT
22
Rx B
OUTPUTS
RXBBIB-
CPOUT-
Rx/Tx GAIN
CONTROL
37
36
GNDCP
Tx OUTPUT
7
CPOUT+
VCCTXPAD
QMUX
VCCCP
B3
38
6
XTAL1
B4
RSSI
MAX2839
VCCXTAL
Rx/Tx GAIN
CONTROL
Rx/Tx GAIN
CONTROL
5
REFCLK
RXINB-
39
RSSI
MUX
CLKOUT
RXINB+
40
4
SCLK
GNDRXLNA_B
Rx B INPUT
QMUX
3
ENABLE
VCCRXLNA_B
41
VCCTXMX
B0
LOAD
42
2
B5
VCCRXLNA_A
Rx GAIN
CONTROL
Rx GAIN
SELECT
IMUX
1
PABIAS
GNDRXLNA_A
______________________________________________________________________________________
SERIAL
INPUT
SERIAL
OUTPUT
SERIAL
INPUT
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
GNDRXLNA_A 1
RXINA+
RXINA-
RXTX
VCCRXMX
TXBBQ-
TXBBQ+
TXBBI+
TXBBI-
VCCRXFL
VCCRXVGA
RXBBIA+
RXBBIA-
RXBBQA+
RXBBQA-
56
55
54
53
52
51
50
49
48
47
46
45
44
43
+
42 RXHP
VCCRXLNA_A 2
41 B6
B0 3
40 B7
LOAD 4
39 RSSI
VCCRXLNA_B 5
38 RXBBQB+
GNDRXLNA_B 6
37 RXBBQB-
RXINB+ 7
36 RXBBIB+
MAX2839
RXINB- 8
35 RXBBIB-
B4 9
34 DIN
B3 10
33 DOUT
32 CS
VCCTXPAD 11
B2 12
31 VCCVCO
TXOUT+ 13
30 VCOBYP
29 GNDVCO
TXOUT- 14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
B1
B5
PABIAS
VCCTXMX
SCLK
ENABLE
CLKOUT
REFCLK
XTAL1
VCCXTAL
VCCCP
GNDCP
CPOUT+
CPOUT-
*EP
TQFN
*EP = EXPOSED PAD.
Chip Information
PROCESS: BiCMOS
______________________________________________________________________________________
23
MAX2839
Pin Configuration
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
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
PACKAGE OUTLINE
56L THIN QFN, 8x8x0.8mm
21-0135
24
______________________________________________________________________________________
F
1
2
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
PACKAGE OUTLINE
56L THIN QFN, 8x8x0.8mm
21-0135
F
2
2
______________________________________________________________________________________
25
MAX2839
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.)
MAX2839
2.3GHz to 2.7GHz MIMO Wireless Broadband
RF Transceiver
Revision History
REVISION
NUMBER
REVISION
DATE
0
2/08
Initial release
1
3/08
Corrected Ordering Information and pin 42 in Pin Description
DESCRIPTION
PAGES
CHANGED
—
1, 19
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.