MAX2838ETM+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX2838ETM+ ,3.3GHz to 3.9GHz Wireless Broadband RF TransceiverApplicationsPin Configuration802.16-2004/802.16d Fixed WiMAX™802.16e MIMO Mobile WiMAX48 47 46 45 4 ..
MAX2839ETN+ ,2.3GHz to 2.7GHz MIMO Wireless Broadband RF TransceiverBlock Diagram/Typical Operating mark of the WiMAX Forum.Circuit appear at end of data sheet.19-3218 ..
MAX2839ETN+T ,2.3GHz to 2.7GHz MIMO Wireless Broadband RF TransceiverFeaturesThe MAX2839 direct conversion, zero-IF, RF transceiver ● 2.3GHz to 2.7GHz Wideband Operatio ..
MAX2851ITK , 5GHz, 5-Channel MIMO Receiver
MAX2900ETI+ ,200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM BandsApplicationsPART TEMP RANGE PIN-PACKAGEAutomatic Meter Reading MAX2900ETI+ -40°C to +85°C 28 QFN-EP ..
MAX2900ETI+ ,200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM BandsELECTRICAL CHARACTERISTICS(V = +2.7V to +4.5V, EN = OOKIN = REFEN = high, T = -40°C to +85°C. Typic ..
MAX6126AASA21 ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceFeaturesThe MAX6126 is an ultra-low-noise, high-precision, low- Ultra-Low 1.3µV Noise (0.1Hz to 10 ..
MAX6126AASA25+ ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceMAX6126 Ultra-High-Precision, Ultra-Low-Noise,Series Voltage Reference
MAX6126AASA50 ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceApplicationsGNDS 4 5 I.C.*High-Resolution A/D and D/A ConvertersATE EquipmentSO/µ MAXHigh-Accuracy ..
MAX6126B25+ ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceFeaturesThe MAX6126 is an ultra-low-noise, high-precision, low- ● Ultra-Low 1.3μV Noise (0.1Hz to 1 ..
MAX6126B30+ ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceElectrical Characteristics—MAX6126_21 (V = 2.048V)OUT(V = 5V, C = 0.1μF, I = 0, T = T to T , unless ..
MAX6126B50 ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceGeneral Description Beneits and

MAX2838ETM+
3.3GHz to 3.9GHz Wireless Broadband RF Transceiver
General Description
The MAX2838 direct-conversion, zero-IF, RF transceiv-
er is designed specifically for 3.3GHz to 3.9GHz wire-
less broadband systems. The MAX2838 completely
integrates all circuitry required to implement the RF
transceiver function, providing RF-to-baseband receive
path, baseband-to-RF transmit path, VCO, frequency
synthesizer, and baseband/control interface. The
device includes a fast-settling sigma-delta RF synthe-
sizer with smaller than 29Hz frequency steps. The
MAX2838 supports 2Tx, 2Rx MIMO applications with a
master device providing coherent LO to the slave
device. The transceiver IC also integrates circuits for
on-chip DC-offset cancellation, I/Q error, and carrier-
leakage detection circuits. Only an RF bandpass filter
(BPF), TCXO, RF switch, PA, and a small number of
passive components are needed to form a complete
wireless broadband RF radio solution.
The MAX2838 completely eliminates the need for an
external SAW filter by implementing on-chip monolithic
filters for both the receiver and transmitter. The base-
band filters along with the Rx and Tx signal paths are
optimized to meet the stringent noise figure and lineari-
ty specifications. The device supports up to 2048-FFT
OFDM and implements programmable channel filters
for 1.5MHz to 28MHz RF channel bandwidths. The
transceiver requires only 2µs Tx-Rx switching time. The
IC is available in a small 48-pin thin QFN package mea-
suring only 6mm x 6mm x 0.8mm.
Applications
802.16-2004/802.16d Fixed WiMAX™
802.16e MIMO Mobile WiMAX
WiMAXPico and Femto Basestations
NLOS Wireless Broadband Systems
Features3.3GHz to 3.9GHz Wide-Band OperationMaster-Slave Modes with Coherent LO for MIMOComplete RF Transceiver, and PA Driver
0dBm Linear OFDM Transmit Power
-70dBr Tx Spectral Emission Mask
2.8dB Rx Noise Figure
Tx/Rx I/Q Error and LO Leakage Detection and
Adjustment
Automatic Rx DCOffset Correction
Monolithic Low-Noise VCO with -39dBc Integrated
Phase Noise
Programmable Rx I/Q Lowpass Channel Filters
Programmable Tx I/Q Lowpass Anti-Aliasing Filter
Sigma-Delta Fractional-N PLL with29Hz Step Size
60dB Tx Gain Control Range with 1dB Step Size,
Digitally Controlled
94dB Rx Gain Control Range with 2dB Step Size,
Digitally Controlled
60dB Analog RSSI Instantaneous Dynamic Range
4-Wire SPI™Digital Interface
I/Q Analog Baseband Interface
Digital Tx/Rx/Shutdown Mode Control
Low-Power CLOCKOUTMode
On-Chip Digital Temperature Sensor Readout+2.7V to +3.6V Transceiver SupplyLow-Power Shutdown ModeSmall 48-Pin Thin QFN Package (6mm x 6mm x 0.8mm)
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver47464544434241403938371415161718192021222324
48 THIN QFN
MAX2838
GNDVCO
GNDCP
CPOUT+
CPOUT
VCCCP
REFCLKVCCDIG
CLKOUT
SCLK
VCCTMX
PABIAS
RXBBQ+
RXBBQ-
RSSI
DIN
DOUT
EXTVCO+
EXTVCO-
VCCLO
VCCVCO
VCOBYP
RXBBI-RXHPVCCRXVGARXBBI+VCCRXFLTXBBI-TXBBI+TXBBQ+TXBBQ-VCCRXMXRXTXENABLE
VCCRXLNA
GNDRXLNA
RXRF+
RXRF-
VCCTXPAD
TXRF+
TXRF-
Pin Configuration
Ordering Information
19-1049; Rev 1; 8/08
*EP = Exposed paddle.
+Denotes a lead-free package.
T = Tape and reel.
PARTTEMP RANGEPIN-PACKAGEAX 2838E TM + T- 40°C to + 85°C 48 TQ FN - E P *
WiMAX is a trademark of the WiMAX Forum.
SPI is a trademark of Motorola, Inc.
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(MAX2838 Evaluation Kit, VCC_ = 2.7V to 3.6V, TA= -40°C to +85°C, ENABLE and RXTX set according to operating mode, CS=
high, SCLK = DIN = low, transmitter and receiver in maximum gain, no input signal at RF inputs, all RF inputs and outputs terminated
into 50Ω, receiver baseband outputs are open. 90mVRMSdifferential I and Q signals (1MHz) applied to I and 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= 3.6GHz, and TA= +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.
VCC_Pins to GND..................................................-0.3V to +3.6V
RF Inputs: RXRF+, RXRF-, EXTVCO+,
EXTVCO- to GND................................................-0.3V to +3.6V
RF Outputs: TXRF+, TXRF-, EXTVCO+,
EXTVCO- to GND................................................-0.3V to +3.6V
Analog Inputs: TXBBI+, TXBBI-, TXBBQ+,
TXBBQ-, REFCLK to GND...................................-0.3V to +3.6V
Analog Outputs: RXBBI+, RXBBI-, RXBBQ+,
RXBBQ-, RSSI, VCOBYP, CPOUT+, CPOUT-,
PABIAS to GND...................................................-0.3V to +3.6V
Digital Inputs: ENABLE, RXTX, CS, SCLK,
DIN, RXHP B1–B7 to GND..................................-0.3V to +3.6V
Digital Outputs: DOUT, CLKOUT to GND.............-0.3V to +3.6V
Short-Circuit Duration
Analog Outputs: RXBBI+, RXBBI-, RXBBQ+,
RSSI, VCOBYP,RXBBQ-, CPOUT+, CPOUT-,
PABIAS, TXRF-, TXRF+......................................................10s
Digital Outputs: DOUT, CLKOUT.........................................10s
RF Input Power: RXRF+, RXRF-.....................................+15dBm
RF Output Differential Load VSWR: TXRF+, TXRF-.................6:1
Continuous Power Dissipation (TA= +70°C)
48-Pin Thin QFN (derate 37mW/°C above +70°C)......> 2.96W
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
PARAMETERSCONDITIONSMINTYPMAXUNITS
Supply VoltageVCC_2.72.83.6Vhutd ow n m odeTA = +25°C12µA
Single configuration3552
MIMO master configuration44
Standby mode,
see Tables
1 and 2MIMO slave configuration11
Single configuration103133
MIMO master configuration112Rx mode, see
Tables 1 and 2
MIMO slave configuration80
Single configuration152186
MIMO master configuration160Tx mode, see
Tables 1 and 2
MIMO slave configuration128
Single configuration142182
MIMO master configuration151
Rx calibration
mode, see
Tables 1 and 2MIMO slave configuration119
Single configuration111145
MIMO master configuration120
Supply Current
Tx calibration
mode, see
Tables 1 and 2MIMO slave configuration88
D9:D8 = 00 in A4:A0 = 001000.81.01.2
D9:D8 = 01 in A4:A0 = 001001.1
D9:D8 = 10 in A4:A0 = 001001.2
Rx I/Q Output Common-Mode
Voltage
D9:D8 = 11 in A4:A0 = 001001.35
CAUTION! ESD SENSITIVE DEVICE
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—Rx MODE
(MAX2838 Evaluation Kit, VCC_ = 2.8V, TA= +25°C, fLO= 3.6GHz, fRF= 3.601GHz, receiver baseband I/Q outputs at 90mVRMS, fREF
= 40MHz, CS= ENABLE = RXTX = high, SCLK = DIN = low, channel bandwidth BW = 7MHz, with power matching for the RF inputs
using the typical applications and registers set to default settings and corresponding test mode, unless otherwise noted.
Unmodulated single-tone RF input signal is used with specifications that normally apply over the entire operating conditions, unless
otherwise indicated. Rx I/Q differential output load impedance = 10kΩ|| 8pF.) (Note 1)
PARAMETERSCONDITIONSMINTYPMAXUNITS
Tx Baseband Input Common-
Mode Voltage Operating RangeDC-coupled0.51.2V
Tx Baseband Input Bias CurrentSource current820µA
LOGIC INPUTS: ENABLE, RXTX, SCLK, DIN, CS, B1:B7, RXHP
Digital Input Voltage High, VIHV C C - 0.4V
Digital Input Voltage Low, VIL0.4V
Digital Input Current High, IIH-1+1µA
Digital Input Current Low, IIL-1+1µA
LOGIC OUTPUTS: DOUT
Digital Output Voltage High, VOHSourcing 100µAV C C - 0.4V
Digital Output Voltage Low, VOLSinking 100µA0.4V
PARAMETERCONDITIONSMINTYPMAXUNITS
RECEIVER SECTION: LNA RF INPUT TO BASEBAND I/Q OUTPUTS
RF Input Frequency Range3.33.9GHz
Peak-to-Peak Gain Variation over
RF Input Frequency RangeTested at band edges and band center1.8dB
RF Input Return LossAll LNA settings10dB
Maximum gain, B7:B1 = 00000008898Total Voltage GainTA = -40°C to +85°C Minimum gain, B7:B1 = 1111111510dB
From max RF gain to max RF Gain - 8dB8
From max RF gain to max RF gain - 16dB16RF Gain Steps
From max RF gain to max RF gain - 32dB32
Any RF or baseband gain change; gain settling to within
±1dB of steady state; RXHP = 1200
Gain Change Settling TimeAny RF or baseband gain change; gain settling to within
±0.1dB of steady state; RXHP = 1500
Baseband Gain RangeFr om m axi m um b aseb and g ai n ( B5:B1 = 00000) to m i ni m um aseb and g ai n ( B5:B1 = 11111) 62dB
Baseb and Gai n M i ni m um S tep S i ze2dB
DC ELECTRICAL CHARACTERISTICS (continued)
(MAX2838 Evaluation Kit, VCC_ = 2.7V to 3.6V, TA= -40°C to +85°C, ENABLE and RXTX set according to operating mode, CS=
high, SCLK = DIN = low, transmitter and receiver in maximum gain, no input signal at RF inputs, all RF inputs and outputs terminated
into 50Ω, receiver baseband outputs are open. 90mVRMSdifferential I and Q signals (1MHz) applied to I and 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= 3.6GHz, and TA= +25°C, unless otherwise noted.) (Note 1)
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(MAX2838 Evaluation Kit, VCC_ = 2.8V, TA= +25°C, fLO= 3.6GHz, fRF= 3.601GHz, receiver baseband I/Q outputs at 90mVRMS, fREF
= 40MHz, CS= ENABLE = RXTX = high, SCLK = DIN = low, channel bandwidth BW = 7MHz, with power matching for the RF inputs
using the typical applications and registers set to default settings and corresponding test mode, unless otherwise noted.
Unmodulated single-tone RF input signal is used with specifications that normally apply over the entire operating conditions, unless
otherwise indicated. Rx I/Q differential output load impedance = 10kΩ|| 8pF.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
Voltage gain ≥ 65dB with max RF gain (B7:B6 = 00)2.9ol tag e g ai n = 50d B w i th m ax RF g ai n - 8d B ( B7:B6 = 01) 7.9ol tag e g ai n = 45d B w i th m ax RF g ai n - 16d B ( B7:B6 = 10) 13.7DSB Noise Figureol tag e g ai n = 15d B w i th m ax RF g ai n - 32d B ( B7:B6 = 11) 31.4
Max RF gain (B7:B6 = 00)-35
Max RF gain - 8dB (B7:B6 = 01)-27
Max RF gain - 16dB (B7:B6 = 10)-19In-Band Input P-1dB
Max RF gain - 32dB (B7:B6 = 11)-3
dBm
Maximum Output Signal LevelOver passband frequency range; at any gain setting;
1dB compression point, differential output2.5VP-P
Max RF gain (B7:B6 = 00), AGC set for -65dBm wanted
signal-10
Max RF gain - 8dB (B7:B6 = 01), AGC set for -55dBm
wanted signal-5
Max RF gain - 16dB (B7:B6 = 10), AGC set for -40dBm
wanted signal-4
Out-of-Band Input IP3 (Note 2)
Max RF gain - 32dB (B7:B6 = 11), AGC set for -30dBm
wanted signal+23
dBm
I/Q Phase Error1MHz baseband output; 1 σ variation, TA = +25°C0.15D eg r ees
I/Q Gain Imbalance1MHz baseband output; 1 σ variation, TA = +25°C0.05dB
I/Q Output DC DroopAfter completion of default power-on on-chip DC
cancellation, 1 σ variation±1V/s
I/Q Static DC OffsetN o RF i np ut si g nal ; B7:B1 = 0000000, after com p l eti on ofefaul t p ow er - on on- chi p D C cancel l ati on, 1 σ var i ati on±1.0mV
Loopback Gain (for Receiver I/Q
Calibration)
Tr ansm itter I/Q i nput to r ecei ver I/Q outp ut; tr ansm i tter B6:B1 =
000011, r ecei ver B5:B1 = 10011 p r og r am m ed thr oug h S P I-7.0-2+2.5dB
RECEIVER BASEBAND FILTERS
Corner frequency 1600
Corner frequency 2100
Corner frequency 330
Corner frequency 41
Baseband Highpass Filter Corner
Frequency
Corner frequency 50.1
kHz
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—Rx MODE (continued)
(MAX2838 Evaluation Kit, VCC_ = 2.8V, TA= +25°C, fLO= 3.6GHz, fRF= 3.601GHz, receiver baseband I/Q outputs at 90mVRMS, fREF
= 40MHz, CS= ENABLE = RXTX = high, SCLK = DIN = low, channel bandwidth BW = 7MHz, with power matching for the RF inputs
using the typical applications and registers set to default settings and corresponding test mode, unless otherwise noted.
Unmodulated single-tone RF input signal is used with specifications that normally apply over the entire operating conditions, unless
otherwise indicated. Rx I/Q differential output load impedance = 10kΩ|| 8pF.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
A4:A0 = 00010 serial bits D7:D4 = 00001.5
A4:A0 = 00010 serial bits D7:D4 = 00011.75
A4:A0 = 00010 serial bits D7:D4 = 00103.5
A4:A0 = 00010 serial bits D7:D4 = 00115.0
A4:A0 = 00010 serial bits D7:D4 = 01005.5
A4:A0 = 00010 serial bits D7:D4 = 01016.0
A4:A0 = 00010 serial bits D7:D4 = 01107.0
A4:A0 = 00010 serial bits D7:D4 = 01118.0
A4:A0 = 00010 serial bits D7:D4 = 10009.0
A4:A0 = 00010 serial bits D7:D4 = 100110.0
A4:A0 = 00010 serial bits D7:D4 = 101012.0
A4:A0 = 00010 serial bits D7:D4 = 101114.0
A4:A0 = 00010 serial bits D7:D4 = 110015.0
A4:A0 = 00010 serial bits D7:D4 = 110120.0
A4:A0 = 00010 serial bits D7:D4 = 111024.0
RF Channel BW Supported by
Baseband Filter
A4:A0 = 00010 serial bits D7:D4 = 111128.0
MHz
Baseband Gain Ripple0 to 3.2MHz for BW = 7MHz1dBP-P
Baseband Group Delay Ripple0 to 3.2MHz for BW = 7MHz65nsP-P
At 4.67MHz7
At > 10.5MHz53
At > 14MHz75
Baseband Filter Rejection for
7MHz RF Channel BW
At > 29.4MHz75
RSSI
RSSI Minimum Output VoltageRLOAD ≥ 10kΩ0.65V
RSSI Maximum Output VoltageRLOAD ≥ 10kΩ2.4V
RSSI Slope30mV/dB
+32dB signal step200RSSI Output Settling TimeTo within 3dB of steady
state-32dB signal step800ns
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—Tx MODE
(MAX2838 Evaluation Kit, VCC_ = 2.8V, TA= +25°C, fRF= 3.601GHz , fLO= 3.6GHz. fREF= 40MHz, ENABLE = CS= high, and RXTX
= SCLK = DIN = low, with power matching for the differential RF pins using the Typical Operating Circuit. Lowpass filter is set to
7MHz RF channel BW, 90mVRMSsine and cosine signal (or 90mVRMS64QAM 1024-FFT OFDMA FUSC I/Q signals wherever OFDM
is mentioned) applied to baseband I/Q inputs of transmitter (differential DC-coupled). Registers set to recommended settings and
corresponding test mode, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTS
RF Output Frequency Range3.33.9GHz
Peak-to-Peak Gain Variation over
RF Band2.6dB
Total Voltage GainMaximum gain; at unbalanced 50Ω matched output8dB
Maximum Output Power over
FrequencyFD M si g nal confor m i ng to sp ectr al em i ssi on m ask and 36d B EV M after I/Q i m bal ance cal i br ation by m od em ( N ote 3)0dBm
RF Output Return LossAll gain settings7dB
RF Gain Control Range60dB124816
RF Gain Control Binary Weights32
Unwanted Sideband SuppressionWithout calibration by modem, and excludes modem I/Q
imbalance; POUT = 0dBm-40dBc
Carrier LeakageRel ati ve to 0d Bm outp ut p ow er ; w i thout cal i b r ati on b y m od em -40dBc
Minimum differential resistance60kΩTx I/Q Input Impedance (R || C)Maximum differential capacitance0.5pF
0 to 4.67MHz-8Baseband Frequency Response
for 7MHz RF Channel BWAt > 13.23MHz-45dB
Baseband Group Delay Ripple0 to 4.9MHz (BW = 7MHz)15nsP-P
AC ELECTRICAL CHARACTERISTICS—FREQUENCY SYNTHESIS
(MAX2838 Evaluation Kit, VCC= 2.8V, TA= +25°C, fLO= 3.6GHz, fREF= 40MHz, CS= high, SCLK = DIN = low, PLL loop bandwidth
= 180kHz, charge-pump comparison frequency = 40MHz, TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
FREQUENCY SYNTHESIZER
RF Channel Center Frequency3.33.9GHz
Channel Center Frequency
Programming Minimum Step Size29Hz
Charge-Pump Comparison
Frequency1140MHz
Reference Frequency Range114080MHz
Refer ence Fr eq uency Inp ut Level sAC-coupled to REFCLK pin800mVP-P
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
AC ELECTRICAL CHARACTERISTICS—FREQUENCY SYNTHESIS (continued)
(MAX2838 Evaluation Kit, VCC= 2.8V, TA= +25°C, fLO= 3.6GHz, fREF= 40MHz, CS= high, SCLK = DIN = low, PLL loop bandwidth
= 180kHz, charge-pump comparison frequency = 40MHz, TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
A4:A0 = 10100, D2:D1 = 001Programmable Reference Divider
ValuesA4:A0 = 10100, D2:D1 = 012
Closed-Loop Integrated Phase
Noise
Loop BW = 180kHz, integrate phase noise from 200Hz to
5MHz-39dBc
Charge-Pump Output CurrentOn each differential side0.8mA
fOFFSET = 0 to 1.8MHz-45
fOFFSET = 1.8MHz to 7MHz-70Close-In Spur Level
fOFFSET > 7MHz-80
dBc
Reference Spur LevelfOFFSET ≥ 40MHz-73dBc
Turnaround LO Frequency ErrorRel ati ve to stead y state; m easur ed 35µs after Tx- Rx or Rx- Tx
sw i tchi ng i nstant, and 4µs after any r ecei ver g ai n chang es±50Hz
Temperature Range over which
VCO Maintains Lock
Rel ati ve to the i ni ti al am b i ent tem p er atur e TA , as l ong as
the fi nal tem p er atur e i s w i thi n op er ati ng tem p er atur e r ang eTA ± 40°CLKO U T Fr eq uency D i vi d er V al uesA4:A0 = 10100, D6:D5 = 01 ( N ote 4) 2
Low drive1.6CLKOUT Output SwingR = 10kΩ, C = 10pFHigh drive2.4VP-P
External VCO Input PowerMIMO slave mode only-10dBm
External VCO Output PowerMIMO master mode only-8dBm
AC ELECTRICAL CHARACTERISTICS—MISCELLANEOUS BLOCKS
(MAX2838 Evaluation Kit, VCC= 2.8V, fREF= 40MHz, CS= high, SCLK = DIN = low, and TA= +25°C, unless otherwise noted) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
PA BIAS DAC: CURRENT MODE
Numbers of bits6
Minimum Output Sink CurrentD5:D0 = 000000 in A4:A0 = 111000µA
Maximum Output Sink CurrentD5:D0 = 111111 in A4:A0 = 11100310µA
Compliance Voltage Range0.8V
Turn-On TimeE xcl ud es p r og r am m ab l e d el ay of 0 to 7µs i n step s of 0.5µs200ns
DNL1LSB
PA BIAS DAC: VOLTAGE MODE
Output High Level10mA source currentVCC - 0.2V
Output Low Level10mA sink current0.1V
Turn-On TimeE xcl ud es p r og r am m ab l e d el ay of 0 to 7µs i n step s of 0.5µs200ns
ON-CHIP TEMPERATURE SENSOR
TA = +25°C01111
TA = +85°C11001Digital Output CodeRead-out at DOUT pin through SPI
A4:A0 = 00111, D4:D0
TA = -40°C00100
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
Note 1:Min and max limits are guaranteed by test above TA= +25°C and are guaranteed by design and characterization at TA=
-40°C. The power-on register settings are not guaranteed. Recommended register setting must be loaded after VCCis supplied.
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.
Note 4:VCCrise time (0V to 2.7V) must be less than 1ms.
AC ELECTRICAL CHARACTERISTICS—TIMING
(MAX2838 Evaluation Kit, VCC= 2.8V, fLO= 3.6GHz, fREF= 40MHz, CS= high, SCLK = DIN = low, PLL loop bandwidth = 180kHz,
and TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SYSTEM TIMING
Automatic VCO sub-band selection2ms
Channel Switching Time
Frequency
error
settles to
±50HzManual VCO sub-band selection56µs
Rx to Tx2
Turnaround Time
Measured from Tx or Rx
enable rising edge, signal
settling to within 0.5dB of
steady stateTx to Rx2
Tx Turn-On Time (from Standby
Mode)easur ed fr om Tx enab l e r i si ng ed g e, si g nal
settl i ng to w i thi n 0.5d B of stead y state2µs
Tx Tur n- Off Ti m e ( to S tand b y M od e) From Tx-enable falling edge0.1µs
Rx Turn-On Time (from Standby
Mode)easur ed fr om Rx enab l e r i si ng ed g e, si g nal
settl i ng to w i thi n 0.5d B of stead y state2µs
Rx Tur n- Off Ti m e ( to S tand b y M od e) From Rx-enable falling edge0.1µs
4-WIRE SERIAL INTERFACE TIMING (See Figure 1)
SCLK Rising Edge to CS Falling
Edge Wait TimetCSO6ns
Falling Edge of CS to Rising
Edge of First SCLK TimetCSS6ns
DIN to SCLK Setup TimetDS6ns
DIN to SCLK Hold TimetDH6ns
SCLK Pulse-Width HightCH6ns
SCLK Pulse-Width LowtCL6ns
Last Rising Edge of SCLK to
Rising Edge of CS or Clock to
Load Enable Setup Time
tCSH6ns
CS High Pulse WidthtCSW20ns
Ti m e Betw een Ri si ng E d g e of C S
and the N ext Ri si ng E d g e of S C LKtCS16ns
Clock FrequencyfCLK45MHz
Rise TimetRfCLK / 10ns
Fall TimetFfCLK / 10ns
SCLK Falling Edge to Valid DOUTtD12.5ns
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
Rx SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2838toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
+85°C
-40°C+25°C
NOISE FIGURE vs. BASEBAND GAIN SETTING
MAX2838toc02
BASEBAND VGA CODE
NOISE FIGURE (dB)
LNA = MAX - 40dB
LNA = MAX - 32dB
LNA = MAX - 24dB
LNA = MAX - 16dB
LNA = MAX - 8dB
LNA = MAX
Rx VOLTAGE GAIN vs. FREQUENCY
MAX2838toc03a
FREQUENCY (GHz)
GAIN (dB)
LNA = MAX - 40dB
LNA = MAX - 32dB
LNA = MAX - 24dB
LNA = MAX - 16dB
LNA = MAX - 8dB
LNA = MAX
Rx VOLTAGE GAIN (MAXIMUM LNA GAIN)
vs. FREQUENCY
MAX2838toc03b
FREQUENCY (MHz)
GAIN (dB)
-40°C
+85°C+25°C
Rx VOLTAGE GAIN vs. BASEBAND
GAIN SETTING
MAX2838toc04
BASEBAND VGA CODE
VOLTAGE GAIN (dB)
LNA = MAX - 40dB
LNA = MAX - 32dB
LNA = MAX - 24dB
LNA = MAX - 16dB
LNA = MAX - 8dB
LNA = MAX
Rx OUTPUT V1dB vs. GAIN SETTING
MAX2838toc05
BASEBAND VGA CODE
OUTPUT V1dB (V
RMS
Rx EVM vs. PIN (CHANNEL
BANDWIDTH = 10MHz, 64 QAM FUSC)
MAX2838toc06
PIN (dBm)
EVM (%)
LNA = MAX - 40dB
LNA = MAX - 32dB
LNA = MAX - 24dB
LNA = MAX - 16dBLNA = MAX - 8dB
LNA = MAX
Rx EVM vs. VOUT (CHANNEL
BANDWIDTH = 10MHz, 64 QAM FUSC)
MAX2838toc07
VOUT(dBVRMS)
EVM (%)
WiMAX EVM vs. OFDM JAMMER
(7MHz CHANNEL BANDWIDTH, 64 QAM FUSC)
MAX2838toc08a
PJAMMER at ANTENNA (dBm)
EVM (%)
fOFFSET = 7MHzfOFFSET = 14MHz
PWANTED = PSENSITIVITY + 3dB = -71.4dBm AT
ANTENNA (INCLUDING 4dB FRONT-END LOSS).
EVM AT PSENSITIVITY = 6%, WITHOUT JAMMER.
Typical Operating Characteristics
(VCC= 2.8V, TA= +25°C, fLO = 3.6GHz, fREF = 40MHz, CS= high, RXHP = SCLK = DIN = low, RF BW = 7MHz, using the MAX2838
Evaluation Kit.)
RECEIVER
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
Typical Operating Characteristics (continued)
(VCC= 2.8V, TA= +25°C, fLO = 3.6GHz, fREF = 40MHz, CS= high, RXHP = SCLK = DIN = low, RF BW = 7MHz, using the MAX2838
Evaluation Kit.)
WiMAX EVM vs. OFDM JAMMER
(10MHz CHANNEL BANDWIDTH, 64 QAM FUSC)
MAX2838toc08b
PJAMMER AT ANTENNA (dBm)
EVM (%)
fOFFSET = 10MHz
fOFFSET = 20MHz
PWANTED = PSENSITIVITY + 3dB = -70.3dBm AT
ANTENNA (INCLUDING 4dB FRONT-END LOSS).
EVM AT PSENSITIVITY = 5.85%, WITHOUT JAMMER.
Rx EMISSION SPECTRUM, LNA INPUT
(Tx OFF, LNA = MAX)
MAX2838toc09
0Hz26.5GHz
(dBm)
Rx INPUT DIFFERENTIAL IMPEDANCE
vs. FREQUENCY
MAX2838toc10
FREQUENCY (GHz)
REAL COMPONENT (
IMAGINARY COMPONENT (
IMAGINARY
REAL
Rx INPUT RETURN LOSS vs. FREQUENCY
(LNA = MAX)
MAX2838toc11a
30kHz6.0GHz
(dB)
3.9GHz3.6GHz3.3GHz
RSSI VOLTAGE vs. INPUT POWER
MAX2838toc12
PIN (dBm)
RSSI VOLTAGE (V)
LNA = MAX - 40dB
LNA = MAX - 32dB
LNA = MAX - 24dB
LNA = MAX - 16dB
LNA = MAX - 8dB
LNA = MAX
Rx RSSI STEP RESPONSE
(+40dB SIGNAL STEP)
MAX2838toc13
200ns/div
1.45V
0.45V
LNA GAIN CONTROL
RSSI OUTPUT
Rx RSSI STEP RESPONSE
(-40dB SIGNAL STEP)
MAX2838toc14
200ns/div
1.5V
0.45V
LNA GAIN CONTROL
RSSI
Rx LPF GROUP DELAY vs. FREQUENCY
MAX2838toc15
FREQUENCY (MHz)
LPF GROUP DELAY (ns)
CHANNEL BW = 5MHz
CHANNEL BW = 8MHz
CHANNEL BW = 9MHz
CHANNEL BW = 10MHz
Rx INPUT RETURN LOSS vs. FREQUENCY
(LNA = MAX - 32dB)
MAX2838toc11b
30kHz6.0GHz
(dB)
3.9GHz3.6GHz3.3GHz
MAX2838
3.3GHz to 3.9GHz
Wireless Broadband RF Transceiver
Typical Operating Characteristics (continued)
(VCC= 2.8V, TA= +25°C, fLO = 3.6GHz, fREF = 40MHz, CS= high, RXHP = SCLK = DIN = low, RF BW = 7MHz, using the MAX2838
Evaluation Kit.)
Rx DC OFFSET SETTLING RESPONSE
(+8dB BB VGA GAIN STEP)
MAX2838toc16
10μs/div
2V/div
10mV/div
VGA GAIN CONTROL
Rx DC OFFSET SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)
MAX2838toc17
10μs/div
2V/div
10mV/div
VGA GAIN CONTROL
Rx DC OFFSET SETTLING RESPONSE
(-16dB BB VGA GAIN STEP)
MAX2838toc18
10μs/div
2V/div
10mV/div
VGA GAIN CONTROL
Rx DC OFFSET SETTLING RESPONSE
(-32dB BB VGA GAIN STEP)
MAX2838toc19
10μs/div
2V/div
10mV/div
VGA GAIN CONTROL
Rx BBVGA SETTLING RESPONSE
(+8dB GAIN STEP)
MAX2838toc20
200ns/div
100mV/div
2V/divVGA GAIN CONTROL
Rx BBVGA SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)
MAX2838toc21
200ns/div
100mV/div
2V/divVGA GAIN CONTROL
Rx BBVGA SETTLING RESPONSE
(-16dB GAIN STEP)
MAX2838toc22
200ns/div
500mV/div
2V/divVGA GAIN CONTROL
Rx BBVGA SETTLING RESPONSE
(-32dB GAIN STEP)
MAX2838toc23
200ns/div
1V/div
2V/divVGA GAIN CONTROL
Rx LNA SETTLING RESPONSE
(MAX TO MAX - 8dB)
MAX2838toc24
1μs/div
500mV/div
2V/divLNA GAIN CONTROL

Partno	Mfg	Dc	Qty	Available	Descript
MAX2838ETM+ \|MAX2838ETM	MAXIM	N/a	44	avai	3.3GHz to 3.9GHz Wireless Broadband RF Transceiver