MAX2641EUT ,300MHz to 2500MHz SiGe Ultra-Low-Noise AmplifiersELECTRICAL CHARACTERISTICS(V = +3.0V, P = -34dBm, Z = 50Ω , T = +25°C, unless otherwise noted.) (No ..
MAX2641EUT ,300MHz to 2500MHz SiGe Ultra-Low-Noise Amplifiersapplications, with a typical performance of 15.1dB gain, High Gaininput IP3 of -10dBm, and a noise ..
MAX2641EUT+T ,300MHz to 2500MHz SiGe Ultra-Low-Noise AmplifiersELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, T = T to T unless otherwise noted. Typical values ar ..
MAX2641EUT-T ,400MHz to 2500MHz SiGe Ultra-Low-Noise AmplifiersELECTRICAL CHARACTERISTICS(V = +3.0V, P = -34dBm, Z = 50Ω, T = +25°C, unless otherwise noted.) (Not ..
MAX2642EXT+ ,900MHz SiGe, High-Variable IP3, Low-Noise AmplifierApplications800MHz/900MHz Cellular PhonesPIN-TOPPART TEMP. RANGEPACKAGE MARK900MHz Cordless PhonesM ..
MAX2643EXT-T ,900MHz SiGe / High IP3 / Low-Noise Amplifiersfeatures a 13dB attenuation step, which On-Chip Output Matchingextends the LNA’s dynamic range. Bo ..
MAX5982BETE+ ,IEEE 802.3af/at-Compliant, Powered Device Interface Controllers with Integrated 70W High-Power MOSFETApplicationsThe devices detect the presence of a wall adapter power IEEE 802.3af/at Powered Devices ..
MAX5984AETI+ ,Single-Port, 40W, IEEE 802.3af/at PSE Controller with Integrated MOSFETApplications)PoE Repeaters PSE OUTPUTSwitches/RoutersAGNDIndustrial Automation EquipmentV-54V EEOUT ..
MAX6001EUR ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesMAX6001–MAX600513-1395; Rev 1; 4/99Low -Cost, Low -Pow er, Low -Dropout, SOT23-3 Voltage References
MAX6001EUR+T ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesApplicationsOrdering InformationPortable/Battery-Powered EquipmentNotebook ComputersPIN- SOTPART TE ..
MAX6001EUR+T ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesFeaturesThe MAX6001–MAX6005 family of SOT23, low-cost♦ 1% max Initial Accuracyseries voltage refere ..
MAX6001EUR-T ,Low-Cost / Low-Power / Low-Dropout / SOT23-3 Voltage ReferencesFeaturesThe MAX6001–MAX6005 family of SOT23, low-cost' 1% max Initial Accuracyseries voltage refere ..
MAX2640EUT-MAX2640EUT+T-MAX2641EUT-MAX2641EUT+T
300MHz to 2500MHz SiGe Ultra-Low-Noise Amplifiers
General DescriptionThe MAX2640/MAX2641 are low-cost, ultra-low-noise
amplifiers designed for applications in the cellular, PCS,
GPS, and 2.4GHz ISM frequency bands. Operatingfrom
a single +2.7V to +5.5V supply, these devices consume
only 3.5mA of current while providing a low noise fig-
ure, high gain, high input IP3, and an operating fre-
quency range that extends from 400MHz to 2500MHz.
The MAX2640 is optimized for 400MHz to 1500MHz
applications, with a typical performance of 15.1dB gain,
input IP3 of -10dBm, and a noise figure of 0.9dB at
900MHz. The MAX2641 is optimized for 1400MHz to
2500MHz applications, with a typical performance of
14.4dB gain, an input IP3 of -4dBm, and a noise figure
of 1.3dB at 1900MHz.
These devices are internally biased, eliminating the
need for external bias resistors and chokes. In a typical
application, the only external components needed are a
two-element input match, input and output blocking
capacitors, and a VCCbypass capacitor.
The MAX2640/MAX2641 are designed on a high-fre-
quency, low-noise, advanced silicon-germanium
process and are offered in the space-saving 6-pin
SOT23 package.
Applications400MHz/900MHz/2.4GHz ISM Radios
Cellular/PCS Handsets
GPS Receivers
Cordless Phones
Wireless LANs
Wireless Data
FeaturesWide Operating Frequency Range
MAX2640: 400MHz to 1500MHz
MAX2641: 1400MHz to 2500MHzLow Noise Figure
MAX2640: 0.9dB at 900MHz
MAX2641: 1.2dB at 1575MHz
1.3dB at 1900MHz
1.5dB at 2450MHzHigh Gain
MAX2640: 15.1dB at 900MHz
MAX2641: 15.7dB at 1575MHz
14.4dB at 1900MHz
13.5dB at 2450MHzHigh Reverse Isolation
MAX2640: 40dB at 900MHz
MAX2641: 31dB at 1575MHz
30dB at 1900MHz
24dB at 2450MHz+2.7V to +5.5V Single-Supply OperationLow 3.5mA Supply CurrentUltra-Small SOT23-6 Package
MAX2640/MAX2641
400MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
Typical Operating Circuits19-1384; Rev 2; 8/03
Ordering Information
Pin Configuration appears at end of data sheet.
MAX2640/MAX2641
400MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +2.7V to +5.5V, TA= TMINto TMAX,unless otherwise noted. Typical values are at VCC= +3.0V, TA= +25°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.
VCCto GND .............................................................-0.3V to +6V
RFIN Power (50Ωsource) (Note 1)..................................+5dBm
Continuous Power Dissipation (TA= +70°C)
SOT23-6 (derate 8.7mW/°C above +70°C)..................696mW
Operating Temperature Range...........................-40°C to +85°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10s).................................+300°C
RF ELECTRICAL CHARACTERISTICS(VCC= +3.0V, PRFIN= -34dBm, ZO= 50Ω, TA= +25°C, unless otherwise noted.) (Notes 2 and 3)
Note 1:Pin must be AC-coupled with a DC blocking capacitor.
MAX2640/MAX2641
400MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
Note 2:Guaranteed by design and characterization.
Note 3:Measured using typical operating circuit. Input and output impedance matching networks were optimized for best simulta-
neous gain and noise-figure performance.
Note 4:External component and circuit losses degrade noise-figure performance. Specification excludes external component and
circuit board losses.
Note 5:Measured with two input tones, f1= 899MHz, f2= 901MHz, both at -34dBm per tone.
Note 6:Measured with two input tones, f1= 1899MHz, f2= 1901MHz, both at -34dBm per tone.
Note 7:Measured with two input tones, f1= 1574MHz, f2= 1576MHz, both at -34dBm per tone.
Note 8:Measured with two input tones, f1= 2449MHz, f2= 2451MHz, both at -34dBm per tone.
RF ELECTRICAL CHARACTERISTICS (continued)(VCC= +3.0V, PRFIN= -34dBm, ZO= 50Ω, TA= +25°C, unless otherwise noted.) (Notes 2 and 3)
Typical Operating Characteristics(VCC= +3V, PRFIN= -34dBm, Typical Operating Circuits, TA = +25°C, unless otherwise noted.)
MAX2640/MAX2641
400MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
Typical Operating Characteristics (continued)(VCC= +3V, PRFIN= -34dBm, Typical Operating Circuits, TA = +25°C, unless otherwise noted.)
MAX2640/MAX2641
400MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
Detailed DescriptionThe MAX2640 and MAX2641 are ultra-low-noise ampli-
fiers that operate with RF input frequency ranges of
400MHz to 1500MHz (MAX2640) or 1400MHz to
2500MHz (MAX2641). These devices are available in
SOT23-6 packages and contain internal bias circuitry to
minimize the number of required external components.
Their small size and low external component count
make them ideal for applications where board space is
limited.
Applications Information
External Matching ComponentsThe MAX2640/MAX2641 are easy to use, generally
requiring only five external components as shown in the
Typical Operating Circuit. To reduce external compo-
nent count further, replace external inductors with
microstrip transmission lines. The high reverse isolation
allows the tuning of the input matching network without
affecting the output match, and vice versa. Select input
and output matching networks to obtain the desired
combination of gain, noise figure, and return loss per-
formance. The Typical Operating Circuitsshow the rec-
ommended input and output matching networks for
the MAX2640/MAX2641 at 900MHz and 1900MHz,
respectively. These values are optimized for best
simultaneous gain, noise figure, and return loss perfor-
mance. To aid in the design of matching networks for
other frequencies, Tables 1 and 2 list typical device S-
parameters and Tables 3 and 4 list typical device noise
parameters.
Pin Description
MAX2640/MAX2641
400MHz to 2500MHz SiGe
Ultra-Low-Noise Amplifiers
