MAX2831ETM+T ,2.4GHz to 2.5GHz, 802.11g RF Transceivers with Integrated PAELECTRICAL CHARACTERISTICS(MAX2831 EV kit: V = 2.7V to 3.6V, V = V = 2.7V to 4.2V, T = -40°C to +85 ..
MAX2831ETM+T ,2.4GHz to 2.5GHz, 802.11g RF Transceivers with Integrated PAApplications♦ Transceiver Operates from +2.7V to +3.6VWi-Fi, PDA, VOIP, and Cellular Handsets♦ PA O ..
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
MAX6125ESA ,SOT23 / Low-Cost / Low-Dropout / 3-Terminal Voltage References
MAX6125ESA ,SOT23 / Low-Cost / Low-Dropout / 3-Terminal Voltage References
MAX6125EUR ,SOT23 / Low-Cost / Low-Dropout / 3-Terminal Voltage References
MAX6126A21+ ,Ultra-High-Precision, Ultra-Low-Noise, Series Voltage ReferenceElectrical Characteristics—MAX6126_21 (V = 2.048V) (continued)OUT(V = 5V, C = 0.1μF, I = 0, T = T t ..
MAX6126A25 ,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 ..
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 ..
MAX2831ETM+-MAX2831ETM+T
2.4GHz to 2.5GHz, 802.11g RF Transceivers with Integrated PA
General DescriptionThe MAX2831/MAX2832 direct conversion, zero-IF, RF
transceivers are designed specifically for 2.4GHz to
2.5GHz 802.11g/b WLAN applications. The MAX2831
completely integrates all circuitry required to implement
the RF transceiver function, providing an RF power
amplifier (PA), RF-to-baseband receive path, baseband-
to-RF transmit path, VCO, frequency synthesizer, crystal
oscillator, and baseband/control interface. The MAX2832
integrates the same functional blocks except for the PA.
Both devices include a fast-settling sigma-delta RF syn-
thesizer with smaller than 20Hz frequency steps and a
digitally tuned crystal oscillator allowing use of a low-cost
crystal. The devices also integrate on-chip DC-offset
cancellation and I/Q errors and carrier leakage-detection
circuits. Only an RF bandpass filter (BPF), crystal, RF
switch, and a small number of passive components are
needed to form a complete 802.11g/b WLAN RF front-
end solution.
The MAX2831/MAX2832 completely eliminate the need
for an external SAW filter by implementing on-chip mono-
lithic filters for both the receiver and transmitter. The
baseband filters are optimized to meet the IEEE 802.11g
standard and proprietary turbo modes up to 40MHz
channel bandwidth. These devices are suitable for the full
range of 802.11g OFDM data rates (6Mbps to 54Mbps)
and 802.11b QPSK and CCK data rates (1Mbps to
11Mbps). The ICs are available in a small, 48-pin TQFN
package measuring only 7mm x 7mm x 0.8mm.
ApplicationsWi-Fi, PDA, VOIP, and Cellular Handsets
Wireless Speakers and Headphones
General 2.4GHz ISM Radios
Features2.4GHz to 2.5GHz ISM Band OperationIEEE 802.11g/b Compatible (54Mbps OFDM and
11Mbps CCK) Complete RF Transceiver, PA, and Crystal
Oscillator (MAX2831)
Best-in-Class Transceiver Performance
62mA Receiver Current
2.6dB Rx Noise Figure
-76dBm Rx Sensitivity (54Mbps OFDM)
No I/Q Calibration Required
0.1dB/0.35°Rx I/Q Gain/Phase Imbalance
33dB RF and 62dB Baseband Gain Control
Range
60dB Range Analog RSSI per RF Gain Setting
Fast Rx I/Q DC-Offset Settling
Programmable Baseband Lowpass Filter
20-Bit Sigma-Delta Fractional-N PLL with
< 20Hz Step Size
Digitally Tuned Crystal Oscillator
+18.5dBm Transmit Power (5.6% EVM with
54Mbps OFDM)
31dB Tx Gain Control Range
Integrated Power Detector (MAX2831)
Serial or Parallel Gain-Control Interface
> 40dB Tx Sideband Suppression without
Calibration
Tx/Rx I/Q Error DetectionTransceiver Operates from +2.7V to +3.6VPA Operates from +2.7V to +4.2V (MAX2831) Low-Power Shutdown Mode Small 48-Pin TQFN Package
(7mm x 7mm x 0.8mm)
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Ordering Information19-0363; Rev 2; 3/11
Pin Configuration appears at end of data sheet.
EVALUATION KIT
AVAILABLE
PARTTEMP RANGEPIN-PACKAGEA X2 8 3 1 E TM + T- 40°C to + 85°C 48 TQFN- EP*
A X2 8 3 2 E TM + T- 40°C to + 85°C 48 TQFN- EP*
*EP=Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(MAX2831 EV kit: VCC_= 2.7V to 3.6V, VCCPA= VCCTXPA= 2.7V to 4.2V, TA= -40°C to +85°C, Rx set to the maximum gain. CS=
high, RXHP = SCLK = DIN = low, RSSI and clock output buffer are off, no signal at RF inputs, all RF inputs and outputs terminated
into 50Ω, receiver baseband outputs are open. 100mVRMSdifferential I and Q signals (54Mbps IEEE 802.11g OFDM) applied to I/Q
baseband inputs of transmitter in transmit mode, fREF= 40MHz, and registers set to recommended settings and corresponding test
mode, unless otherwise noted. Typical values are at VCC= 2.8V, VCCPA= 3.3V, and TA= +25°C, LO frequency = 2.437GHz, unless
otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun,
and SMA connectors.) (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.
VCCTXPA, VCCPAand TXRF_ to GND....................-0.3V to +4.5V
VCCLNA, VCCTXMX, VCCPLL, VCCCP, VCCXTAL, VCCVCO,
VCCRXVGA, VCCRXFL, and VCCRXMX_ to GND....-0.3V to +3.9V
B6, B7, B3, B2, SHDN, B5, CS, SCLK, DIN, B1, TUNE, B4,
TXBBI_, TXBBQ_, RXHP, RXTX, RXBBI_, RXBBQ_, RSSI,
BYPASS, CPOUT, LD, CLOCKOUT, XTAL, CTUNE, RXRF_ to
GND.......................................-0.3V to (Operating VCC+ 0.3V)
RXBBI_, RXBBQ_, RSSI, BYPASS, CPOUT, LD, CLOCKOUT
Short-Circuit Duration..........................................................10s
RF Input Power...............................................................+10dBm
Continuous Power Dissipation (TA= +70°C)
48-Pin TQFN (derates 27.8mW/°C above +70°C)..........2.22W
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
Soldering Temperature (reflow).......................................+260°C
CAUTION! ESD SENSITIVE DEVICE
PARAMETERSCONDITIONSMINTYPMAXUNITSVCC_2.73.6Supply VoltageVCCPA, VCCTXPA2.74.2Vhutd own m od e,
B7: B1 = 0000000,efer ence osci ll ator not
ap pl i ed
TA = +25°C20µA
TA = +25°C2835Standby modeTA = -40°C to +85°C35
TA = +25°C6278Rx modeTA = -40°C to +85°C82
MAX2831, transmit section82104AX 2831, P A, P OU T = + 18.2d Bm 209258
Tx mode, TA = +25°C,
VCC = 2.8V, VCCPA =
3.3V, (Note 2)MAX283286
Rx calibration modeTA = +25°C101
Supply Current
Tx calibration modeTA = +25°C78
Rx I/Q Output Common-Mode
VoltageTA = +25°C at default common-mode setting0.981.21.33V
TA = -40°C (relative to TA = +25°C)-17Rx I/Q Output Common-Mode
Voltage VariationTA = +85°C (relative to TA = +25°C)15mV
Tx Baseband Input Common-
Mode Voltage Operating RangeDC-coupled0.91.3V
Tx Baseband Input Bias CurrentSource current22µA
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
DC ELECTRICAL CHARACTERISTICS (continued)(MAX2831 EV kit: VCC_= 2.7V to 3.6V, VCCPA= VCCTXPA= 2.7V to 4.2V, TA= -40°C to +85°C, Rx set to the maximum gain. CS=
high, RXHP = SCLK = DIN = low, RSSI and clock output buffer are off, no signal at RF inputs, all RF inputs and outputs terminated
into 50Ω, receiver baseband outputs are open. 100mVRMSdifferential I and Q signals (54Mbps IEEE 802.11g OFDM) applied to I/Q
baseband inputs of transmitter in transmit mode, fREF= 40MHz, and registers set to recommended settings and corresponding test
mode, unless otherwise noted. Typical values are at VCC= 2.8V, VCCPA= 3.3V, and TA= +25°C, LO frequency = 2.437GHz, unless
otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun,
and SMA connectors.) (Note 1)
PARAMETERSCONDITIONSMINTYPMAXUNITS
LOGIC INPUTS: SHDN, RXTX, SCLK, DIN, CS, B7:B1, RXHPDigital Input-Voltage High, VIHVCC -
0.4V
Digital Input-Voltage Low, VIL0.4V
Digital Input-Current High, IIH-1+1µA
Digital Input-Current Low, IIL-1+1µA
LOGIC OUTPUTS: LD, CLOCKOUTDigital Output-Voltage High, VOHSourcing 100µAVCC -
0.4V
Digital Output-Voltage Low, VOLSinking 100µA0.4V
AC ELECTRICAL CHARACTERISTICS—Rx Mode(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA=+25°C, fRF= 2.439GHz, fLO= 2.437GHz; receiver baseband I/Q out-
puts at 112 mVRMS(-19dBV), fREF= 40MHz, SHDN= 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.
Unmodulated single-tone RF input signal is used with specifications which normally apply over the entire operating conditions, unless
otherwise indicated. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB,
balun, and SMA connectors.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
RECEIVER SECTION: LNA RF INPUT-TO-BASEBAND I/Q OUTPUTSRF Input Frequency Range2.42.5GHz
High RF gain18
Mid RF gain11RF Input Return Loss
Low RF gain14
TA = +25°C8698Maximum gain, B7:B1 =
1111111TA = -40°C to +85°C83Total Voltage Gain
Minimum gain, B7:B1 =
0000000TA = +25°C38
From high-gain mode (B7:B6 = 11) to medium-gain
mode (B7:B6 = 10)-16
RF Gain Steps (Note 3)
From high-gain mode (B7:B6 = 11) to low-gain mode
(B7:B6 = 0X)-33
RF Gain-Change Settling Time
Gain change from high gain to medium gain, high gain to
low, or medium gain to low gain; gain settling to within
±2dB of steady state; RXHP = 1
0.2µs
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Rx Mode (continued)(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA=+25°C, fRF= 2.439GHz, fLO= 2.437GHz; receiver baseband I/Q out-
puts at 112 mVRMS(-19dBV), fREF= 40MHz, SHDN= 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.
Unmodulated single-tone RF input signal is used with specifications which normally apply over the entire operating conditions, unless
otherwise indicated. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB,
balun, and SMA connectors.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSBaseband Gain RangeFrom maximum baseband gain (B5:B1 = 11111) to
minimum baseband gain (B5:B1 = 00000)556267dB
Voltage gain = maximum with B7:B6 = 112.6
Voltage gain = 50dB with B7:B6 = 113.2
Voltage gain = 45dB with B7:B6 = 1016DSB Noise Figure
Voltage gain = 15dB with B7:B6 = 0X34
B7:B6 = 11-41
B7:B6 = 10-24In-Band Compression Point
Based on EVM
-19dBVRMS baseband
output EVM degrades toB7:B6 = 0X-6
dBm
In-Band Output P-1dBVoltage gain = 90dB, with B7:B6 = 112.5VP-P
B7:B6 = 11-12
B7:B6 = 10-4Out-of-Band Input IP3 (Note 4)
B7:B6 = 0X24
dBm
I/Q Phase Error1σ variation (without calibration)±0.35D eg r ees
I/Q Gain Imbalance1σ variation (without calibration)±0.1dB
Minimum differential resistance10kΩRX I/Q Output Load Impedance
(R || C)Maximum differential capacitance10pF
Tx-to-Rx Conversion Gain for Rx
I/Q CalibrationFor receiver gain, B7:B1 = 1101111 (Note 5)0.5dB
Baseband VGA Settling TimeGain change from B5:B1 = 10111 to B5:B1 = 00111; gain
settling to within ±2dB of steady state0.1µs
I/Q Output DC Step when RXHP
Transitions from 1 to 0 in
Presence of 802.11g Short
Sequence
After switching RXHP to logic 0 from initial logic 1, during
ideal short sequence data at -55dBm input in AWGN
channel, for -19dBV output; normalized to RMS signal on
I and Q outputs; transition point varied from 0 to 0.8µs in
steps of 0.1µsdBc
I/Q Output DC DroopAfter switching RXHP to 0, D13:D12, Register 7
(A3:A0 = 0111)±1V/s
I/Q Static DC OffsetRXHP = 1, B7:B1 = 1101110, 1σ variation±1mV
Spurious Signal Emissions from
LNA inputRF = 1GHz to 26.5GHz-51dBm
RECEIVER BASEBAND FILTERSGain Ripple in Passband10kHz to 8.5MHz at baseband±1.3DBP-Pr oup - D el ay Ri p p l e i n P assb and 10kHz to 8.5MHz at baseband±45nsP-P
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Rx Mode (continued)(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA=+25°C, fRF= 2.439GHz, fLO= 2.437GHz; receiver baseband I/Q out-
puts at 112 mVRMS(-19dBV), fREF= 40MHz, SHDN= 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.
Unmodulated single-tone RF input signal is used with specifications which normally apply over the entire operating conditions, unless
otherwise indicated. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB,
balun, and SMA connectors.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSAt 8.5MHz3.2
At 15MHz27
At 20MHz50
Baseband Filter Rejection
(Nominal Mode)
At > 40MHz80
RSSIRSSI Minimum Output VoltageRLOAD ≥ 10kΩ || 5pF0.4V
RSSI Maximum Output VoltageRLOAD ≥ 10kΩ || 5pF2.4V
RSSI Slope30mV/dB
+32dB signal step200RSSI Output Settling TimeTo within 3dB of steady
state-32dB signal step600ns
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Tx Mode(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fRF= 2.439GHz , fLO= 2.437GHz. fREF= 40MHz, SHDN=
RXTX = CS= high, and SCLK = DIN = low, with power matching for the differential RF pins using the typical applications circuit.
100mVRMSsine and cosine signal (or 100mVRMS54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to base-
band I/Q inputs of transmitter (differential DC-coupled). Registers set to recommend settings and corresponding test mode, unless
otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun,
and SMA connectors.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
TRANSMIT SECTION: Tx BASEBAND I/Q INPUTS TO RF OUTPUTSRF Output Frequency Range2.42.5GHz
Output power adjusted
to meet 5.6% EVM,
and spectral mask
18.554Mbps 802.11g
OFDM signal
B6:B1 = 000000-7.5
MAX2831
802.11b signal,
141mVRMS,
IEEE802.11b I/Q
signals
Output power adjusted
to meet spectral mask21
-3dB VGA back off-5.3
Output Power
MAX2832B6:B1 = 000000-31.5
dBmnw anted S i d eb and S up p r essi onWithout I/Q calibration, B6:B1 = 100001-42dBc
Carrier Leakage at Center
Frequency of ChannelWithout DC offset correction-30dBc
1/3 x fLO-67
< 1GHz-36
> 1GHz-47
2/3 x fLO-64
4/3 x fLO-42
5/3 x fLO-65
8/3 x fLO-51
2 x fLO-33
Transmitter Spurious Signal
Emissions (MAX2831)
B6:B1 = 111000,
OFDM signal
3 x fLO-54
dBm/
MHz
1/3 x fLO-78
< 1GHz-65
> 1GHz-72
2/3 x fLO-78
4/3 x fLO-46
5/3 x fLO-72
8/3 x fLO-46
2 x fLO-60
Transmitter Spurious Signal
Emissions (MAX2832)
B6:B1 = 111111,
OFDM signal
3 x fLO-75
dBm/
MHz
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Tx Mode (continued)(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fRF= 2.439GHz , fLO= 2.437GHz. fREF= 40MHz, SHDN=
RXTX = CS= high, and SCLK = DIN = low, with power matching for the differential RF pins using the typical applications circuit.
100mVRMSsine and cosine signal (or 100mVRMS54Mbps IEEE 802.11g I/Q signals wherever OFDM is mentioned) applied to base-
band I/Q inputs of transmitter (differential DC-coupled). Registers set to recommend settings and corresponding test mode, unless
otherwise noted. RF inputs/outputs specifications are referenced to device pins and do not include 1dB loss from EV kit PCB, balun,
and SMA connectors.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSMAX2831-20RF Output Return LossO ff- chi p b al un + m atch, si ng l e-
end ed MAX2832-10dB
Minimum differential resistance20kΩTx I/Q Input Load Impedance
(R || C)Maximum differential capacitance0.7pF
Baseband -3dB Corner
Frequency
D1:D0 = 01, Register 8
(A3:A0 = 1000)Nominal mode11MHz
Baseband Filter RejectionAt 30MHz, in nominal mode62dB
Minimum Power Detector Output
VoltageShort sequence transmitter power = +9dBm0.3V
Maximum Power Detector Output
VoltageShort sequence transmitter power = +19dBm1.2V
RF P ow er D etector Resp onse Ti m e0.3µs
TRANSMITTER LO LEAKAGE AND I/Q CALIBRATION USING LO LEAKAGE AND SIDEBAND DETECTOR (see the Tx/Rx
Calibration Mode section)
Tx BASEBAND I/Q INPUTS TO RECEIVER OUTPUTSOutput at 1 x fTONE
(for LO leakage = -29dBc),
fTONE = 2MHz, 100mVRMS
LO Leakage and Sideband
Detector Output
Calibration register,
D12:D11 = 00,
A3:A0 = 0110Output at 2 x fTONE
(for LO leakage = -240dBc),
fTONE = 2MHz, 100mVRMS
-44BV RM S
Amplifier Gain RangeD12:D11 = 00 to D12:D11 = 11, A3:A0 = 011030dB
Lower -3dB Corner Frequency1MHz
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Frequency Synthesis(MAX2831 EV kit: VCC_= 2.7V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, SCLK =
DIN = low, PLL loop bandwidth = 150kHz, and TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
FREQUENCY SYNTHESIZERRF Channel Center Frequency2.42.5GHz
Channel Center Frequency
Programming Minimum Step Size20Hz
Charge-Pump Comparison
Frequency20MHz
Reference Frequency Range2044MHz
Reference Frequency Input
LevelsAC-coupled to XTAL pin800mVP-P
Resistance (XTAL)5kΩReference Frequency Input
Impedance (R || C)Capacitance (XTAL)4pF
fOFFSET = 1kHz-86
fOFFSET = 10kHz-94
fOFFSET = 100kHz-94
fOFFSET = 1MHz-110
Closed-Loop Phase Noise
fOFFSET = 10MHz-120
dBc/Hz
Closed-Loop Integrated Phase
NoiseRMS phase jitter; integrate from 10kHz to 10MHz offset0.9D eg r ees
Charge-Pump Output Current1mA
Reference Spurs20MHz offset-55dBc
3µs to 9µs50VCO Frequency ErrorM easur ed fr om Tx- Rx or Rx- Tx
tr ansi ti on> 9µs1kHz
VOLTAGE-CONTROLLED OSCILLATORPushingReferred to 2400MHz LO, VCC varies by 0.3V210kHz
VCO Tuning Voltage Range0.52.2VVTUNE = 0.5V 103 LO Tuning Gain VTUNE = 2.2V 86 MHz/V
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Miscellaneous Blocks(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, fLO= 2.437GHZ, fREF= 40MHz, SHDN= CS= high, SCLK = DIN = low,
and TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
CRYSTAL OSCILLATORaxi m um cap aci tance, A3:A0 = 1110, D 6:D 0 = 111111115.4On-Chip Tuning Capacitance
RangeM i ni m um cap aci tance, A3:A0 = 1110, D 6:D 0 = 00000000.5pF
On-Chip Tuning Capacitance
Step Size0.12pF
ON-CHIP TEMPERATURE SENSORTA = -40°C0.35
TA = +25°C1Output VoltageA3:A0 = 1000, D 9:D 8 = 01
TA = +85°C1.6
AC ELECTRICAL CHARACTERISTICS—Timing(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA=+25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, SCLK =
DIN = low, PLL loop bandwidth = 150kHz, and TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
SYSTEM TIMING (See Figure 3)Turn-On TimeFrom SHDN rising edge to LO settled within 1kHz using
external reference frequency input60µs
Crystal Oscillator Turn-On Time90% of final output amplitude level1ms
Channel Switching TimeLoop BW = 150kHz, fRF = 2.5GHz to 2.4GHz25µs
Rx to Tx2
Rx/Tx Turnaround Time
Measured from Tx or Rx
enable rising edge; signal
settling to within ±2dB of
steady stateTx to Rx, RXHP = 12
Tx Turn-On Time (from Standby
Mode)
From Tx-enable active rising edge; signal settling to
within ±2dB of steady state1.5µs
Tx Turn-Off Time (from Standby
Mode)From Tx-enable inactive rising edge1µs
Rx Turn-On Time (from Standby
Mode)
From Rx-enable active rising edge; signal settling to
within ±2dB of steady state1.9µs
Rx Turn-Off Time (from Standby
Mode)From Rx-enable inactive rising edge0.1µs
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
AC ELECTRICAL CHARACTERISTICS—Timing (continued)(MAX2831 EV kit: VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA=+25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, SCLK =
DIN = low, PLL loop bandwidth = 150kHz, and TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
3-WIRE SERIAL-INTERFACE TIMING (See Figure 2)SCLK Rising Edge to CS Falling
Edge Wait Time, tCSO6ns
Falling Edge of CS to Rising
Edge of First SCLK Time, tCSS6ns
DIN to SCLK Setup Time, tDS6ns
DIN to SCLK Hold Time, tDH6ns
SCLK Pulse-Width High, tCH6ns
SCLK Pulse-Width Low, tCL6ns
Last Rising Edge of SCLK to
Rising Edge of CS or Clock to
Load Enable Setup Time, tCSH
6ns
CS High Pulse Width, tCSW20ns
Time Between the Rising Edge of
CS and the Next Rising Edge of
SCLK, tCS1
6ns
Clock Frequency, fCLK20MHz
Rise Time, tR2ns
Fall Time, tF2ns
Note 1:Min and max limits are guaranteed by test at TA= +25°C and +85°C and guaranteed by design and characterization at = -40°C. The power-on register settings are not production tested. Recommended register setting must be loaded after
VCCis supplied.
Note 2:Guaranteed by design and characterization.
Note 3:The nominal part-to-part variation of the RF gain step is ±1dB.
Note 4:Two tones at +25MHz and +48MHz offset with -35dBm/tone. Measure IM3 at 2MHz.
Note 5:Tx I/Q inputs = 100mVRMS.
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Rx ICC vs. VCCVCC (V)
ICC
(mA)
MAX2831/32 toc01
TA = +25°C
TA = -40°C
TA = +85°C
NOISE FIGURE
vs. BASEBAND GAIN SETTINGSBASEBAND GAIN SETTINGS
NF (dB)
MAX2831/32 toc02
LNA = HIGH GAIN
LNA = MEDIUM GAIN
LNA = LOW GAIN
Rx VOLTAGE GAIN
vs. BASEBAND GAIN SETTINGBASEBAND GAIN SETTINGS
GAIN (dB)
MAX2831/32 toc03
LNA = LOW GAIN
LNA = MEDIUM GAIN
LNA = HIGH GAIN
Rx IN-BAND OUTPUT P-1dB vs. GAINGAIN (dB)
OUTPUT P-1dB (dBV
RMS
MAX2831/32 toc0425354555758595
LNA MEDIUM/HIGH-
GAIN SWITCH POINT
LNA MEDIUM/LOW-
GAIN SWITCH POINT
Rx EVM vs. PINPIN (dBm)
EVM (%)
MAX2831/32 toc05
LNA = HIGH GAINLNA = LOW GAIN
LNA = MEDIUM GAIN
Rx EVM vs. VOUTVOUT (dBVRMS)
EVM (%)
MAX2831/32 toc06
PIN = -50dBm
LNA = HIGH GAIN
OFDM EVM WITH OFDM JAMMER
vs. OFFSET FREQUENCYPJAMMER (dBm)
EVM (%)
MAX2831/32 toc07
fOFFSET = 20MHz
fOFFSET = 25MHz
fOFFSET = 40MHz
PIN = -62dBm
Rx EMISSION SPECTRUM, LNA INPUTMAX2831/32 toc08
RBW = 300kHz
VCO LEAKAGE
1.5 VCO LEAKAGE
2x VCO LEAKAGE
3x VCO
4x VCO
dBM
-14026.5GHz
LNA = LOW GAIN
LNA INPUT RETURN LOSS
vs. RF FREQUENCYINPUT RETURN LOSS (dB)
MAX2831/32 toc09
MID GAIN
LOW GAIN
HIGH GAIN
Typical Operating Characteristics(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Typical Operating Characteristics (continued)(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
Rx RSSI OUTPUT vs. INPUT POWERPIN (dBm)
RSSI OUTPUT (V)
MAX2831/32 toc10
LNA = HIGH GAIN
LNA = MEDIUM GAIN
LNA = LOW GAIN
Rx RSSI STEP RESPONSE
(+32dB LNA GAIN STEP)1.45V
200ns/div
MAX2831/32 toc11
Rx RSSI STEP RESPONSE
(-32dB LNA GAIN STEP)1.5V
200ns/div
MAX2831/32 toc12
Rx I/Q DC OFFSET SETTLING RESPONSE
(+8dB BB VGA GAIN STEP)2.0V
5mV
40ns/div
10mV
MAX2831/32 toc13
Rx I/Q DC OFFSET SETTLING RESPONSE
(-8dB BB VGA GAIN STEP)MAX2831/32 toc14
2.5V
5mV
40ns/div
10mV
0mV
Rx I/Q DC OFFSET SETTLING RESPONSE
(-16dB BB VGA GAIN STEP)MAX2831/32 toc15
5mV
400ns/div
10mV
Rx I/Q DC OFFSET SETTLING RESPONSE
(-32dB BB VGA GAIN STEP)MAX2831/32 toc16
5mV
400ns/div
10mV
I/Q OUTPUT DC ERROR DROOP
(RxHP = 1→0; 100Hz MODE)MAX2831/32 toc17
-5mV
20ms/div
-10mV
Rx BB VGA SETTLING RESPONSE
(+8 GAIN STEP)500mV
-500mV
MAX2831/32 toc18
40ns/div
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Rx BB VGA SETTLING RESPONSE
(-8 GAIN STEP)MAX2831/32 toc19
500mV
-500mV
40ns/div
Rx BB VGA SETTLING RESPONSE
(-16 GAIN STEP)MAX2831/32 toc20
500mV
-500mV
40ns/div
Rx BB VGA SETTLING RESPONSE
(-32 GAIN STEP)MAX2831/32 toc21
500mV
-500mV
40ns/div
RF LNA SETTLING RESPONSE
(HIGH TO MEDIUM)MAX2831/32 toc22
500mV
-500mV
100ns/div
RF LNA SETTLING RESPONSE
(HIGH TO LOW)MAX2831/32 toc23
500mV
-500mV
100ns/div
Rx BB FREQUENCY RESPONSE vs.
FINE SETTING (COARSE SETTING = 8.5MHz)FREQUENCY (MHz)
MAX2831/32 toc24
Rx BB FREQUENCY RESPONSE vs.
COARSE SETTING (FINE SETTING = 010)
FREQUENCY (MHz)
MAX2831/32 toc25
RX BASEBAND FILTER
GROUP DELAY
MAX2831/32 toc26
FREQUENCY (MHz)
20ns/div1
HISTOGRAM: Rx STATIC DC OFFSETMAX2831/32 toc27
1σ/div
MEAN: 0mV
STD: 0.977mV
SAMPLE SIZE: 1006
Typical Operating Characteristics (continued)(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
Tx ICC vs. VCCVCC (V)
(mA)
MAX2831/32 toc30
TA = +25°C
TA = -40°C
TA = +85°C
HISTOGRAM: Tx LO LEAKAGEMAX2831/32 toc31
1σ/div
MEAN: -33.45dBc
STD: 6.31dB
SAMPLE SIZE: 999
HISTOGRAM: Tx SIDEBAND
SUPPRESSIONMAX2831/32 toc32
1σ/div
MEAN: -42dBc
STD: 1.9dB
SAMPLE SIZE: 1000
HISTOGRAM: Rx GAIN IMBALANCE
MAX2831/32 toc28
1σ/div
MEAN: 0dB
STD: 0.064dB
SAMPLE SIZE: 951
HISTOGRAM: Rx PHASE IMBALANCE
MAX2831/32 toc29
1σ/div
MEAN: 0.3°
STD: 0.314°
SAMPLE SIZE: 1013
HISTOGRAM: Tx OUTPUT POWER
VARIATIONMAX2831/32 toc33
0.1dB/div
MEAN: 18.5dBm
GAIN ADJUSTED
TO ACHIEVE 5.6%
EVM
Tx BASEBAND FREQUENCY RESPONSE
MAX2831/32 toc34
BASEBAND FREQUENCY (MHz)
FILTER RESPONSE (dB)
Tx OUTPUT POWER vs. FREQUENCY
(B6:B1 = 111111)
(MAX2832 ONLY)
FREQUENCY (GHz)
OUT
(dBm)
MAX2831/32 toc35
TA = +85°C
TA = +25°CTA = -40°C
Typical Operating Characteristics (continued)(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
Tx OUTPUT POWER vs. GAIN SETTING
(MAX2832 ONLY)GAIN SETTINGS
OUT
(dBm)
MAX2831/32 toc36481216202428323640444852566064
-10
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
11g SPECTRAL MASK
(MAX2832 ONLY)FREQUENCY (MHz)
dBm-59
MAX2831/32 toc37
POUT = -2.17dBm
EVM = 2.12%
PA SUPPLY CURRENT vs. POUTPOUT (dBm)
PA SUPPLY CURRENT (mA)
MAX2831/32 toc404681012141618202422
VCCPA = 2.7V, 3.0V, 3.3V
VCCPA = 4.2V
Tx GAIN VARIATION vs. FREQUENCY
(B6:B1 = 101001)FREQUENCY (GHz)
1dB/div
MAX2831/32 toc41
TA = -40°C
TA = +25°C
TA = +85°C
Tx OUTPUT POWER vs. FREQUENCYFREQUENCY (GHz)
OUT
(dBm)
MAX2831/32 toc42
TA = -40°C
TA = +25°C
TA = +85°C
GAIN ADJUSTED TO ACHIEVE 5.6% EVM
11g SPECTRAL MASKFREQUENCY (MHz)
POUT = 18.64dBm
EVM = 5.6%
dBm
MAX2831/32 toc43
dBm
Tx OUTPUT SPURS
(MAX2832 ONLY)
MAX2831/32 toc3826.5GHz
VCO
2x RF
2x VCO
3x VCO
4x VCO
RBW = 1MHz
802.11g SIGNAL
Tx EVM vs. POUTPOUT (dBm)
EVM (%)
MAX2831/32 toc39a46810121416182022
VCCPA = 2.7V
VCCPA = 3.0V
VCCPA = 3.3V
VCCPA = 4.2V
Typical Operating Characteristics (continued)(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
EVM vs. Tx OUTPUT POWER
(MAX2832 ONLY) OUTPUT POWER (dBm)
EVM (%)
MAX2831/32 toc36a
802.11g POUT vs. GAIN SETTING
(UPPER GAIN CONTROL RANGE)
GAIN SETTINGS
OUT
(dBm)
MAX2831/32 toc44444852566064
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
POWER DETECTOR OVER FREQUENCYOUTPUT POWER (dBm)
POWER DETECTOR (V)
MAX2831/32 toc45246810121416182022
fRF = 2.4GHz
fRF = 2.5GHz
POWER DETECTOR OVER SUPPLY VOLTAGEOUTPUT POWER (dBm)
POWER DETECTOR (V)
MAX2831/32 toc46246810121416182022
VCCPA = 2.7V, 3.0V
VCCPA = 3.3V, 4.2V
PA OUTPUT POWER HISTORGRAM
FOR 1.1V POWER DETECTOR OUTPUTMAX2831/32 toc50
0.1dB/div
MEAN = 18.5dBm
PA OUTPUT ENVELOPE RESPONSE1µs/div
MAX2831/32 toc49
-20dBm
20dBm
-50mV
50mV
PA ENVELOPE
TX I/Q INPUT
Tx OUTPUT SPURSMAX2831/32 toc52
26.5GHzDC
VCO
2x RF
2x VCO3x RF
4x RF
RBW = 1MHz
802.11g SIGNAL
POWER-DETECTOR OUTPUT100ns/div
MAX2831/32 toc48
300mV
-300mV
20dB GAIN STEPPA ENVELOPE
POWER DETECTOR
POWER DETECTOR OVER TEMPERATUREPOUT (dBm)
POWER DETECTOR (V)
MAX2831/32 toc47246810121416182022
TA = +85°C
TA = -40°C,
+25°C
PA OUTPUT RETURN LOSS
vs. RF FREQUENCYRF FREQUENCY (MHz)
OUTPUT RETURN LOSS (dB)
MAX2831/32 toc51
Typical Operating Characteristics (continued)
(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
MAX2831/MAX2832
2.4GHz to 2.5GHz 802.11g/b
RF Transceivers with Integrated PA
CHANNEL SWITCHING FREQUENCY
SETTLING (FROM 2500MHz TO 2400MHz)50kHz
-50kHz
250µs0
10kHz/
div
MAX2831/32 toc55
PLL SETTLING TIME FROM
SHUTDOWN TO STANDBY MODE50kHz
-50kHz2ms
10kHz/
div
MAX2831/32 toc56
PLL SETTLING TIME
FROM STANDBY TO Tx50kHz
-50kHz
030µs
10kHz/
div
MAX2831/32 toc57
LO FREQUENCY vs. VTUNEVTUNE (V)
LO FREQUENCY (MHz)
MAX2831/32 toc53
LO PHASE NOISE
vs. OFFSET FREQUENCY
OFFSET FREQUENCY (MHz)
PHASE NOISE
(dBc/Hz)
MAX2831/32 toc54
Typical Operating Characteristics (continued)
(MAX2831 EV kit, VCC_= 2.8V, VCCPA= VCCTXPA= 3.3V, TA= +25°C, fLO= 2.437GHz, fREF= 40MHz, SHDN= CS= high, RXHP =
SCLK = DIN = low.)
Rx TO Tx TURNAROUND
PLL SETTLING TIME25kHz
-25kHz
50µs0
5kHz/
div
MAX2831/32 toc58
CLOCK OUTPUT10ns/div
MAX2831/32 toc60
fCLOCK = 40MHz
CLOAD = 5pF
CRYSTAL-OSCILLATOR OFFSET FREQUENCY
vs. CRYSTAL-OSCILLATOR TUNING BITSCTUNE (DIGITAL BITS)
CRYSTAL OFFSET FREQUENCY (Hz)
MAX2831/32 toc61102030405060708090100110120130
800KYOCERA
(CX-3225SB)
Tx-Rx TURNAROUND PLL SETTLING TIME5kHz/div
-25kHz
050µs
25kHz
MAX2831/32 toc59
