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MAX2051ETP+
SiGe, High-Linearity, 850MHz to 1550MHz Up/Downconversion Mixer with LO Buffer
General DescriptionThe MAX2051 high-linearity, up/downconversion mixer
provides +35dBm input IP3, 7.8dB noise figure (NF), and
7.4dB conversion loss for 850MHz to 1550MHz wireless
infrastructure and multicarrier cable head-end down-
stream video, video-on-demand (VOD), and cable
modem termination systems (CMTS) applications. The
MAX2051 also provides excellent suppression of spuri-
ous intermodulation products (> 77dBc at an RF level of
-14dBm), making it an ideal downconverter for DOCSIS®
3.0 and Euro DOCSIS cable head-end systems. With an
LO circuit tuned to support frequencies ranging from
1200MHz to 2250MHz, the MAX2051 is ideal for high-
side LO injection applications over an IF frequency
range of 50MHz to 1000MHz.
In addition to offering excellent linearity and noise per-
formance, the MAX2051 also yields a high level of com-
ponent integration. The device integrates baluns in the
RF and LO ports, which allow for a single-ended RF
input and a single-ended LO input. The MAX2051
requires a typical LO drive of 0dBm and a supply cur-
rent guaranteed to below 130mA.
The MAX2051 is available in a compact 5mm x 5mm,
20-pin thin QFN package with an exposed pad.
Electrical performance is guaranteed over the extended
temperature range, from TC= -40°C to +85°C.
ApplicationsVideo-on-Demand and DOCSIS-Compatible
Edge QAM Modulation
Cable Modem Termination Systems
Microwave and Fixed Broadband Wireless
Access
Microwave Links
Military Systems
Predistortion Receivers
Private Mobile Radios
Integrated Digital Enhanced Network (iDEN®)
Base Stations
WiMAX™ Base Stations and Customer Premise
Equipment
Wireless Local Loop
Features850MHz to 1550MHz RF Frequency Range1200MHz to 2250MHz LO Frequency Range50MHz to 1000MHz IF Frequency RangeDOCSIS 3.0 and Euro DOCSIS Compatible7.4dB Typical Conversion Loss7.8dB Typical Noise Figure+24dBm Typical Input 1dB Compression Point+35dBm Typical Input IP388dBc Typical 2RF-LO Rejection at PRF= -14dBmIntegrated LO BufferIntegrated RF and LO Baluns for Single-Ended InputsLow LO Drive (0dBm Nominal)External Current-Setting Resistor Provides Option
for Operating Device in Reduced-Power/
Reduced-Performance Mode
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
TQFNTOP VIEW
*EXPOSED PAD. CONNECT EP TO GND.
LOBIAS
GNDGND
GNDIF-IF+GND
GND
GND
GND
GND
GND
GND
GND
GND
EP*VCCRF
MAX2051
Pin Configuration/
Functional Block Diagram
Ordering Information19-4582; Rev 0; 4/09
PARTTEMP RANGEPIN-PACKAGEMAX2051ETP+-40°C to +85°C20 Thin QFN-EP*
MAX2051ETP+T-40°C to +85°C20 Thin QFN-EP*
DOCSIS and CableLabs are registered trademarks of Cable
Television Laboratories, Inc. (CableLabs®).
iDEN is a registered trademark of Motorola, Inc.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
T = Tape and reel.
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(Typical Application Circuit, VCC= +4.75V to +5.25V, no input AC signals. TC= -40°C to +85°C, unless otherwise noted. Typical val-
ues are at VCC= +5.0V, TC= +25°C, unless otherwise noted.)
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.
Note 1:Based on junction temperature TJ= TC+ (θJCx VCCx ICC). This formula can be used when the temperature of the exposed
pad is known while the device is soldered down to a PCB. See the Applications Informationsection for details. The junction
temperature must not exceed +150°C.
Note 2:Junction temperature TJ= TA+ (θJAx VCCx ICC). This formula can be used when the ambient temperature of the PCB is
known. The junction temperature must not exceed +150°C.
Note 3:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to /thermal-tutorial.
Note 4:TCis the temperature on the exposed pad of the package. TAis the ambient temperature of the device and PCB.
VCCto GND...........................................................-0.3V to +5.5V
RF, LO to GND.........................................................-0.3V to 0.3V
IF+, IF-, LOBIAS to GND............................-0.3V to (VCC+ 0.3V)
RF, LO Input Power........................................................+20dBm
RF, LO Current (RF and LO is DC shorted to GND
through balun).................................................................50mA
Continuous Power Dissipation (Note 1) ........................2100mW
θJA(Notes 2, 3)..............................................................+33°C/W
θJC(Note 3)........................................................................8°C/W
Operating Case Temperature Range
(Note 4)...................................................TC= -40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSSupply VoltageVCC4.7555.25V
Supply CurrentICCTotal supply current105130mA
RECOMMENDED AC OPERATING CONDITIONS
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSRF FrequencyfRF(Notes 5, 6)8501550MHz
LO FrequencyfLO(Note 5)12002250MHz
IF FrequencyfIF
Meeting RF and LO frequency ranges; IF
matching components affect the IF
frequency range (Note 5)1000MHz
LO Drive LevelPLO-3+9dBm
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSConversion Power LossLCfRF = 1200MHz, fLO = 1700MHz,
fIF = 500MHz, TC = +25°C (Notes 8, 9)7.49dB
Conversion Power Loss
Temperature CoefficientTCLTC = -40°C to +85°C0.01dB/°C
Conversion Power Loss Variation
vs. FrequencyΔLCfLO = 1200MHz to 2250MHz± 0.5dB
Noise FigureNFSSBSingle sideband7.8dB
Input 1dB Compression PointIP1dB24dBm
Third-Order Input Intercept PointIIP3C C = + 5.0V ,
fR F1 = 1200M H z,
fR F2 = 1201M H z,R F = 0d Bm tone,
fLO = 1562M H z, P LO = 0d Bm , TC = +25°C,
fIF = 362M H z ( N otes 8, 9) 35dBm
PRF =
-14dBm7388
PRF =
-10dBm6984
Single tone, fRF =1200MHz,
fIF = 192.5MHz to 857.5MHz,
fLO = 1392.5MHz to 2057.5MHz,
PLO = +3dBm, resultant
fSPUR = 1007.5MHz to 342.5MHz
(Notes 8, 9, 10)PRF =
0dBm5974
PRF =
-14dBm7478
PRF =
-10dBm7074
2RF-LO Spurious Rejection2 x 1
Single tone, fRF =1200MHz,
fIF = 857.5MHz to 1000MHz,
fLO = 2057.5MHz to 2200MHz,
PLO = +3dBm, resultant
fSPUR = 342.5MHz to 200MHz
(Notes 8, 9, 10)PRF =
0dBm6064
dBc
PRF =
-14dBm6879
PRF =
-10dBm6475
Single tone, fRF =1200MHz,
fIF = 97.5MHz to 430MHz,
fLO = 1297.5MHz to 1630MHz,
PLO = +3dBm, resultant
fSPUR = 195MHz to 860MHz
(Notes 8, 9, 10)PRF =
0dBm5465
PRF =
-14dBm71.577.4
PRF =
-10dBm67.573.4
2LO-2RF Spurious Rejection2 x 2
Single tone, fRF =1200MHz,
fIF = 430MHz to 525MHz,
fLO = 1630MHz to 1725MHz,
PLO = +3dBm, resultant
fSPUR = 860MHz to 1050MHz
(Notes 8, 9, 10)PRF =
0dBm57.563.4
dBc
AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION)(Typical Application Circuit, VCC= +4.75V to +5.25V, RF and LO ports are driven from 50Ωsources, PLO= -3dBm to +3dBm,
PRF= 0dBm, fRF= 1000MHz to 1250MHz, fLO= 1200MHz to 2250MHz, fIF= 50MHz to 1000MHz, fRF< fLO, TC= -40°C to +85°C.
Typical values are at VCC= +5.0V, PRF= 0dBm, PLO= 0dBm, fRF=1200MHz, fLO= 1700MHz, fIF= 500MHz, TC= +25°C, unless
otherwise noted.) (Note 7)
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
AC ELECTRICAL CHARACTERISTICS (DOWNCONVERTER OPERATION) (continued)(Typical Application Circuit, VCC= +4.75V to +5.25V, RF and LO ports are driven from 50Ωsources, PLO= -3dBm to +3dBm,
PRF= 0dBm, fRF= 1000MHz to 1250MHz, fLO= 1200MHz to 2250MHz, fIF= 50MHz to 1000MHz, fRF< fLO, TC= -40°C to +85°C.
Typical values are at VCC= +5.0V, PRF= 0dBm, PLO= 0dBm, fRF=1200MHz, fLO= 1700MHz, fIF= 500MHz, TC= +25°C, unless
otherwise noted.) (Note 7)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSPRF =
-14dBm87.5101
PRF =
-10dBm79.5933LO-3RF Spurious Rejection3 x 3
Single tone, fRF = 1200MHz,
50MHz < fIF < 1000MHz,
1250MHz < fLO < 2200MHz
(Notes 8, 9)
PRF = 0dBm59.573
dBc
LO Leakage at RF PortPLO = +3dBm (Notes 6, 8)-33.5-27.5dBm
LO Leakage at IF PortPLO = +3dBm (Notes 8, 9)-26.3-22.9dBm
RF-to-IF IsolationfR F = 1200M H z, P L O = + 3d Bm ( N otes 8, 9) 2451dB
RF Input ImpedanceZRF50Ω
RF Input Return LossLO on and IF terminated with a matched
impedance12dB
LO Input ImpedanceZLO50Ω
LO Input Return LossRF and IF terminated with a matched
impedance (Note 11)11dB
IF Output ImpedanceZIFNominal differential impedance at the IC’s
IF outputs50Ω
IF Output Return Loss
RF ter m i nated i nto 50Ω , LO d r i ven b y 50Ω
sour ce, IF tr ansfor m ed to 50Ω si ng l e- end ed
usi ng exter nal com p onents show n i n the
Typ i cal Ap p l i cati on C i r cui tdB
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)(Typical Application Circuit, RF and LO ports are driven from 50Ωsources, fRF< fLO. Typical values are at VCC= +5.0V, PIF= 0dBm,
PLO= 0dBm, fRF= 1250MHz, fLO= 1600MHz, fIF= 350MHz, TC= +25°C, unless otherwise noted.) (Note 7)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSConversion Power LossLC7.5dB
Third-Order Input Intercept
PointIIP3fIF1 = 350M H z, fIF2 = 351M H z, P IF = 0d Bm /tone33.4dBm
LO-2IF Spurious Rejection61dBc
LO+2IF Spurious Rejection63.3dBc
LO-3IF Spurious Rejection78dBc
LO+3IF Spurious Rejection79dBc
LO Leakage at RF PortPLO = +3dBm-35.7dBm
IF Leakage at RF Port-52dBm
RF Return Loss12.3dB
IF Input Return LossfLO = 1200MHz18dB
Note 5:Operation outside this range is possible, but with degraded performance of some parameters. See the Typical Operating
Characteristics section.
Note 6:Not production tested.
Note 7:All values reflect losses of external components, including a 0.6dB loss at fIF= 350MHz and a 0.8dB loss at
fIF= 1000MHz due to the 1:1 transformer. Output measurements were taken at IF outputs of the Typical Application Circuit.
Note 8:Guaranteed by design and characterization.
Note 9:100% production tested for functionality.
Note 10:Additional improvements (of up to 4dB to 6dB) in spurious responses can be made by increasing the LO drive to +6dBm.
Note 11:The LO return loss can be improved by tuning C9 to offset any parasitics within the specific application circuit. Typical
range of C9 is 10pF to 50pF.
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
CONVERSION LOSS vs. IF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc01
IF FREQUENCY (MHz)
CONVERSION LOSS (dB)
TC = -40°C
TC = +25°CTC = +85°C1000
CONVERSION LOSS vs. IF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc02
IF FREQUENCY (MHz)
CONVERSION LOSS (dB)
PLO = -3dBm, 0dBm, +3dBm
CONVERSION LOSS vs. IF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc03
IF FREQUENCY (MHz)
CONVERSION LOSS (dB)
VCC = 4.75V, 5.0V, 5.25V
IIP3 vs. IF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc04
IIP3 (dBm)33
IF FREQUENCY (MHz)
TC = -40°C
TC = +25°C, +85°C
PRF = 0dBm/TONE
MAX2051 toc05
IIP3 vs. IF FREQUENCY
(DOWNCONVERSION MODE)IIP3 (dBm)33
IF FREQUENCY (MHz)
PRF = 0dBm/TONE
PLO = -3dBm, 0dBm, +3dBm
MAX2051 toc06
IIP3 vs. IF FREQUENCY
(DOWNCONVERSION MODE)IIP3 (dBm)33
IF FREQUENCY (MHz)
PRF = 0dBm/TONE
VCC = 5.0V
VCC = 5.25V
VCC = 4.75V
2RF-LO RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc07
IF FREQUENCY (MHz)
2RF-LO RESPONSE (dBc)
TC = -40°C
TC = +25°C
TC = +85°C
PRF = 0dBm
MAX2051 toc08
2RF-LO RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
2RF-LO RESPONSE (dBc)
PRF = 0dBm
PLO = +3dBm
PLO = 0dBm
PLO = -3dBm
MAX2051 toc09
2RF-LO RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
2RF-LO RESPONSE (dBc)
PRF = 0dBm
VCC = 4.75V, 5.0V, 5.25V
Typical Operating Characteristics(Typical Application Circuit, Downconversion mode, VCC= +5.0V, PLO= 0dBm, PRF= 0dBm, fRF= 1200MHz, LO is high-side
injected, TC= +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)(Typical Application Circuit, Downconversion mode, VCC= +5.0V, PLO= 0dBm, PRF= 0dBm, fRF= 1200MHz, LO is high-side
injected, TC= +25°C, unless otherwise noted.)
MAX2051
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO BufferMAX2051 toc10
2LO-2RF RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
PRF = 0dBm
TC = -40°C, +25°C, +85°C
MAX2051 toc11
2LO-2RF RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
PRF = 0dBm
PLO = +3dBm
PLO = 0dBmPLO = -3dBm
2LO-2RF RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc12
IF FREQUENCY (MHz)
2LO-2RF RESPONSE (dBc)
PRF = 0dBm
VCC = 4.75V, 5.0V, 5.25V
MAX2051 toc13
3LO-3RF RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
PRF = 0dBm
TC = -40°C, +25°C, +85°C
MAX2051 toc14
3LO-3RF RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
PRF = 0dBm
PLO = -3dBm, 0dBm, +3dBm
MAX2051 toc15
3LO-3RF RESPONSE vs. IF FREQUENCY
(DOWNCONVERSION MODE)IF FREQUENCY (MHz)
3LO-3RF RESPONSE (dBc)
PRF = 0dBm
VCC = 4.75V, 5.0V, 5.25V
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc16
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
TC = -40°C, +25°C, +85°C
MAX2051 toc17
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
PLO = -3dBm, 0dBm, +3dBmMAX2051 toc18
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT (dBm)
VCC = 4.75V, 5.0V, 5.25V
MAX2051
Typical Operating Characteristics (continued)(Typical Application Circuit,
Downconversion mode, VCC= +5.0V, PLO= 0dBm, PRF= 0dBm, fRF= 1200MHz, LO is high-side
injected, TC= +25°C, unless otherwise noted.)
SiGe, High-Linearity, 850MHz to 1550MHz
Up/Downconversion Mixer with LO Buffer
RF-TO-IF ISOLATION vs. LO FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc19
LO FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
TC = -40°C
TC = +25°C
TC = +85°C
fRF = 1200MHz
MAX2051 toc20
RF-TO-IF ISOLATION vs. LO FREQUENCY
(DOWNCONVERSION MODE)LO FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
PLO = -3dBm, 0dBm, +3dBm
fRF = 1200MHz
MAX2051 toc21
RF-TO-IF ISOLATION vs. LO FREQUENCY
(DOWNCONVERSION MODE)LO FREQUENCY (MHz)
RF-TO-IF ISOLATION (dB)
VCC = 4.75V, 5.0V, 5.25V
fRF = 1200MHz
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc22
LO LEAKAGE AT RF PORT (dBm)
LO FREQUENCY (MHz)
TC = -40°C
TC = +25°C
TC = +85°C
MAX2051 toc23
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)LO LEAKAGE AT RF PORT (dBm)
LO FREQUENCY (MHz)
PLO = -3dBm, 0dBm, +3dBm
MAX2051 toc24
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
(DOWNCONVERSION MODE)LO LEAKAGE AT RF PORT (dBm)
LO FREQUENCY (MHz)
VCC = 4.75V, 5.0V, 5.25V
RF PORT RETURN LOSS vs. RF FREQUENCY
(DOWNCONVERSION MODE)MAX2051 toc25
RF FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
fIF = 200MHz
PLO = -3dBm, 0dBm, +3dBm
MAX2051 toc26
RF PORT RETURN LOSS vs. LO FREQUENCY
(DOWNCONVERSION MODE)
LO FREQUENCY (MHz)
RF PORT RETURN LOSS (dB)
fIF = 50MHz TO 1000MHz
fRF = 1400MHzfRF = 1300MHz
fRF = 1100MHz
fRF = 1200MHz
MAX2051 toc27
IF PORT RETURN LOSS vs. IF FREQUENCY
(DOWNCONVERSION MODE)
IF FREQUENCY (MHz)
IF PORT RETURN LOSS (dB)
VCC = 4.75V, 5.0V, 5.25V
