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MAX2680AUT+TMAXIMN/a300avai400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers
MAX2680EUTMAXIMN/a4786avai400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers
MAX2681EUT+TMAXIMN/a1212avai400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers
MAX2682EUT+ |MAX2682EUTMAXIMN/a40avai400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers
MAX2682EUT+TMAXIM Pb-freeN/a12298avai400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers


MAX2682EUT+T ,400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixersfeatures a low-power shutdown mode in which it typically draws less than 0.1μA of supply current. C ..
MAX2682EUT-T ,400MHz to 2.5GHz / Low-Noise / SiGe Downconverter MixersFeaturesThe MAX2680/MAX2681/MAX2682 miniature, low-cost,' 400MHz to 2.5GHz Operationlow-noise downc ..
MAX2683EUE+ ,3.5GHz Downconverter Mixers with Selectable LO Doublerapplications in the 3.4GHz to 3.8GHz frequency band.The MAX2683 is optimized for downconversion to ..
MAX2683EUE+T ,3.5GHz Downconverter Mixers with Selectable LO DoublerApplications*Exposed padWireless Local Loop (WLL)Digital Microwave Radio (DMR)Typical Operating Cir ..
MAX2685EEE ,Low-Cost / 900MHz / Low-Noise Amplifier and Downconverter MixerApplicationsMAX2685EEE -40°C to +85°C 16 QSOPCellular/Cordless Phones 900MHz ISM-Band RadiosWireles ..
MAX2685EEE-T ,Low-Cost, 900MHz, Low-Noise Amplifier and Downconverter MixerApplicationsMAX2685EEE -40°C to +85°C 16 QSOPCellular/Cordless Phones 900MHz ISM-Band RadiosWireles ..
MAX6035AAUR50+ ,High-Supply-Voltage, Precision Voltage Reference in SOT23features a proprietary 10mA Source Current, 2mA Sink Currenttemperature coefficient curvature-corr ..
MAX6035AAUR50+T ,High-Supply-Voltage, Precision Voltage Reference in SOT23ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V)(V = 5V, I = 0, T = T to T , unless otherwise noted. ..
MAX6035BAUR25+ ,High-Supply-Voltage, Precision Voltage Reference in SOT23Applications PART VOLTAGE(ppm/°C) ACCURACY(V)4mA to 20mA Industrial Digital Multimeters (-40°C to + ..
MAX6035BAUR25+T ,High-Supply-Voltage, Precision Voltage Reference in SOT23FeaturesThe MAX6035 is a high-voltage, precision micropower  Wide Supply Voltage Range: Up to 33Vv ..
MAX6035BAUR25+T ,High-Supply-Voltage, Precision Voltage Reference in SOT23ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V) (continued)(V = 5V, I = 0, T = T to T , unless othe ..
MAX6035BAUR50-T , High-Supply-Voltage, Precision Voltage Reference in SOT23


MAX2680AUT+T-MAX2680EUT-MAX2681EUT+T-MAX2682EUT+-MAX2682EUT+T
400MHz to 2.5GHz, Low-Noise, SiGe Downconverter Mixers
General Description
The MAX2680/MAX2681/MAX2682 miniature, low-cost,
low-noise downconverter mixers are designed for low-
voltage operation and are ideal for use in portable com-
munications equipment. Signals at the RF input port are
mixed with signals at the local oscillator (LO) port using double-balanced mixer. These downconverter mixers
operate with RF input frequencies between 400MHz and
2500MHz, and downconvert to IF output frequencies
between 10MHz and 500MHz.
The MAX2680/MAX2681/MAX2682 operate from a single
+2.7V to +5.5V supply, allowing them to be powered
directly from a 3-cell NiCd or a 1-cell Lithium battery.
These devices offer a wide range of supply currents and
input intercept (IIP3) levels to optimize system perfor-
mance. Additionally, each device features a low-power shutdown mode in which it typically draws less than 0.1μA
of supply current. Consult the Selector Guide for various
combinations of IIP3 and supply current.
The MAX2680/MAX2681/MAX2682 are manufactured on
a high-frequency, low-noise, advanced silicon-germanium
process and are offered in the space-saving 6-pin SOT23
package.
Applications
●400MHz/900MHz/2.4GHz ISM-Band Radios●Personal Communications Systems (PCS)●Cellular and Cordless Phones●Wireless Local Loop●IEEE-802.11 and Wireless Data
Features
●400MHz to 2.5GHz Operation●+2.7V to +5.5V Single-Supply Operation●Low Noise Figure: 6.3dB at 900MHz (MAX2680)●High Input Third-Order Intercept Point
(IIP3 at 2450MHz) -6.9dBm at 5.0mA (MAX2680) +1.0dBm at 8.7mA (MAX2681) +3.2dBm at 15.0mA (MAX2682)●< 0.1μA Low-Power Shutdown Mode●Ultra-Small Surface-Mount Packaging
Typical Operating Circuit appears at end of data sheet.
PARTTEMP RANGEPIN-
PACKAGE
SOT
TOP MARK
MAX2680EUT-T
-40°C to +85°C6 SOT23AAAR
MAX2681EUT-T
-40°C to +85°C6 SOT23AAAS
MAX2682EUT-T
-40°C to +85°C6 SOT23AAAT
PARTICC
(mA)
FREQUENCY
900MHz1950MHz2450MHz
IIP3
(dBm)
(dB)
GAIN
(dB)
IIP3
(dBm)
(dB)
GAIN
(dB)
IIP3
(dBm)
(dB)
GAIN
(dB)

MAX26805.0-12.96.311.6-8.28.37.6-6.911.77.0
MAX26818.7-6.17.014.2+0.511.18.4+1.012.77.7
MAX268215.0-1.86.514.7+4.410.210.4+3.213.47.9
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Selector Guide
Ordering Information
EVALUATION KIT AVAILABLE
VCC to GND .........................................................-0.3V to +6.0VRFIN Input Power (50Ω source) .....................................+10dBmLO Input Power (50Ω source) ........................................+10dBm
SHDN, IFOUT, RFIN to GND ...................-0.3V to (VCC + 0.3V)
LO to GND.......................................(VCC - 1V) to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
SOT23 (derate 8.7mW/°C above +70°C) ....................696mW
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
(MAX2680/1/2 EV Kit, VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. PLO = -5dBm,
PRFIN = -25dBm.)
(VCC = +2.7V to +5.5V, SHDN = +2V, TA = TMIN to TMAX unless otherwise noted. Typical values are at VCC = +3V and TA = +25°C.
Minimum and maximum values are guaranteed over temperature by design and characterization.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS

Operating Supply CurrentICC
MAX26805.07.7MAX26818.712.7
MAX268215.021.8
Shutdown Supply CurrentICCSHDN = 0.5V0.05μA
Shutdown Input Voltage HighVIH2.0V
Shutdown Input Voltage LowVIL0.5V
Shutdown Input Bias CurrentISHDN0 < SHDN < VCC0.2μA
PARAMETERCONDITIONSMINTYPMAXUNITS
MAX2680

RF Frequency Range(Notes 1, 2)4002500MHz
LO Frequency Range(Notes 1, 2)4002500MHz
IF Frequency Range(Notes 1, 2)10500MHz
Conversion Power Gain
fRF = 400MHz, fLO = 445MHz, fIF = 45MHz7.3fRF = 900MHz, fLO = 970MHz, fIF = 70MHz11.6
fRF = 1950MHz, fLO = 1880MHz, fIF = 70MHz (Note 1)5.77.68.6
fRF = 2450MHz, fLO = 2210MHz, fIF = 240MHz7.0
Gain Variation Over TemperaturefRF = 1950MHz, fLO = 1880MHz, fIF = 70MHz,
TA = TMIN to TMAX (Note 1)1.92.4dB
Input Third-Order Intercept Point
(Note 3)
fRF = 900MHz, 901MHz, fLO = 970MHz, fIF = 70MHz-12.9
dBmfRF = 1950MHz, 1951MHz, fLO = 1880MHz, fIF = 70MHz-8.2
fRF = 2450MHz, 2451MHz, fLO = 2210MHz, fIF = 240MHz-6.9
Noise Figure (Single Sideband)
fRF = 900MHz, fLO = 970MHz, fIF = 70MHz6.3fRF = 1950MHz, fLO = 2020MHz, fIF = 70MHz8.3
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Absolute Maximum Ratings

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.
AC Electrical Characteristics
DC Electrical Characteristics
CAUTION! ESD SENSITIVE DEVICE
(MAX2680/1/2 EV Kit, VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. PLO = -5dBm,
PRFIN = -25dBm.)
PARAMETERCONDITIONSMINTYPMAXUNITS

LO Leakage at RFIN PortfLO = 1880MHz-26dBm
IF/2 Spurious ResponsefRF = 1915MHz, fLO = 1880MHz, fIF = 70MHz (Note 4)-51dBm
MAX2681

RF Frequency Range(Notes 1, 2)4002500MHz
LO Frequency Range(Notes 1, 2)4002500MHz
IF Frequency Range(Notes 1, 2)10500MHz
Conversion Power Gain
fRF = 400MHz, fLO = 445MHz, fIF = 45MHz11.0fRF = 900MHz, fLO = 970MHz, fIF = 70MHz14.2
fRF = 1950MHz, fLO = 1880MHz, fIF = 70MHz (Note 1)6.78.49.4
fRF = 2450MHz, fLO = 2210MHz, fIF = 240MHz7.7
Gain Variation Over TemperaturefRF = 1950MHz, fLO = 1880MHz, fIF = 70MHz,
TA = TMIN to TMAX (Note 1)1.72.3dB
Input Third-Order Intercept Point
(Note 3)
fRF = 900MHz, 901MHz, fLO = 970MHz, fIF = 70MHz-6.1
dBmfRF = 1950MHz, 1951MHz, fLO = 1880MHz, fIF = 70MHz+0.5
fRF = 2450MHz, 2451MHz, fLO = 2210MHz, fIF = 240MHz+1.0
Noise Figure (Single Sideband)
fRF = 900MHz, fLO = 970MHz, fIF = 70MHz7.0fRF = 1950MHz, fLO = 2020MHz, fIF = 70MHz11.1
fRF = 2450MHz, fLO = 2210MHz, fIF = 240MHz12.7
LO Input VSWR50Ω source impedance1.5:1
LO Leakage at IFOUT PortfLO = 1880MHz-23dBm
LO Leakage at RFIN PortfLO = 1880MHz-27dBm
IF/2 Spurious ResponsefRF = 1915MHz, fLO = 1880MHz, fIF = 70MHz (Note 4)-65dBm
MAX2682

RF Frequency Range(Notes 1, 2)4002500MHz
LO Frequency Range(Notes 1, 2)4002500MHz
IF Frequency Range(Notes 1, 2)10500MHz
Conversion Power Gain
fRF = 400MHz, fLO = 445MHz, fIF = 45MHz13.4fRF = 900MHz, fLO = 970MHz, fIF = 70MHz14.7
fRF = 1950MHz, fLO = 1880MHz, fIF = 70MHz (Note 1)8.710.411.7
fRF = 2450MHz, fLO = 2210MHz, fIF = 240MHz7.9
Gain Variation Over TemperaturefRF = 1950MHz, fLO = 1880MHz, fIF = 70MHz,
TA = TMIN to TMAX (Note 1)2.13.2dB
Input Third-Order Intercept Point
(Note 3)
fRF = 900MHz, 901MHz, fLO = 970MHz, fIF = 70MHz-1.8
dBmfRF = 1950MHz, 1951MHz, fLO = 1880MHz, fIF = 70MHz+4.4
fRF = 2450MHz, 2451MHz, fLO = 2210MHz, fIF = 240MHz+3.2
Noise Figure (Single Sideband)
fRF = 900MHz, fLO = 970MHz, fIF = 70MHz6.5fRF = 1950MHz, fLO = 2020MHz, fIF = 70MHz10.2
fRF = 2450MHz, fLO = 2210MHz, fIF = 240MHz13.4
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
AC Electrical Characteristics (continued)
(MAX2680/1/2 EV Kit, VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. PLO = -5dBm,
PRFIN = -25dBm.)
Note 1:
Guaranteed by design and characterization.
Note 2:
Operation outside of this specification is possible, but performance is not characterized and is not guaranteed.
Note 3:
Two input tones at -25dBm per tone.
Note 4:
This spurious response is caused by a higher-order mixing product (2x2). Specified RF frequency is applied and IF output
power is observed at the desired IF frequency (70MHz).
(Typical Operating Circuit, VCC = SHDN = +3.0V, PRFIN = -25dBm, PLO = -5dBm, TA = +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS

LO Input VSWR50Ω source impedance1.5:1
LO Leakage at IFOUT PortfLO = 1880MHz-23dBm
LO Leakage at RFIN PortfLO = 1880MHz-27dBm
IF/2 Spurious ResponsefRF = 1915MHz, fLO = 1880MHz, fIF = 70MHz (Note 4)-61dBm
MAX2681
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°CSHDN = VCC
TA = +25°C
TA = -40°C
MAX2682
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°C
TA = +25°CTA = -40°C
SHDN = VCC
MAX2680
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°CTA = +25°C
TA = -40°C
SHDN = VCC
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
AC Electrical Characteristics (continued)
Typical Operating Characteristics
(Typical Operating Circuit, VCC = SHDN = +3.0V, PRFIN = -25dBm, PLO = -5dBm, TA = +25°C, unless otherwise noted.)
MAX2680
CONVERSION POWER GAIN vs. LO POWER
MAX2680/1/2-07
LO POWER (dBm)
CONVERSION POWER GAIN (dB)
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
1880MHz
2210MHz
fIF
70MHz
70MHz
240MHz
fRF = 900MHz
fRF = 2450MHz
fRF = 1950MHz
MAX2681
CONVERSION POWER GAIN vs. LO POWER
MAX2680/1/2-08
LO POWER (dBm)
CONVERSION POWER GAIN (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
1880MHz
2210MHz
fIF
70MHz
70MHz
240MHz
MAX2682
CONVERSION POWER GAIN vs. LO POWER
MAX2680/1/2-09
LO POWER (dBm)
CONVERSION POWER GAIN (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
1880MHz
2210MHz
fIF
70MHz
70MHz
240MHz
MAX2680
CONVERSION POWER GAIN vs. TEMPERATURE
MAX2680/1/2-10
CONVERSION POWER GAIN (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
1880MHz
2210MHz
fIF
70MHz
70MHz
240MHz
MAX2681
CONVERSION POWER GAIN vs. TEMPERATURE
MAX2680/1/2-11
CONVERSION POWER GAIN (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
MAX2682
CONVERSION POWER GAIN vs. TEMPERATURE
MAX2680/1/2-12
CONVERSION POWER GAIN (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
MAX2680
SHUTDOWN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-04
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (µA)
TA = +85°CTA = +25°C
TA = -40°C
SHDN = GND
MAX2681
SHUTDOWN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-05
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (µA)
TA = +85°CTA = +25°C
TA = -40°C
SHDN = GND
MAX2682
SHUTDOWN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-06
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (µA)
TA = +85°CTA = +25°C
TA = -40°C
SHDN = GND
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Typical Operating Characteristics (continued)
(Typical Operating Circuit, VCC = SHDN = +3.0V, PRFIN = -25dBm, PLO = -5dBm, TA = +25°C, unless otherwise noted.)
MAX2680
INPUT IP3 vs. LO POWER
MAX2680/1/2-13
LO POWER (dBm)
INPUT IP3 (dBm)
fRF = 1950MHz, 1951MHz
fLO = 1880MHz
fIF = 70MHz
PRFIN = -25dBm PER TONE
MAX2681
INPUT IP3 vs. LO POWER
MAX2680/1/2-14
LO POWER (dBm)
INPUT IP3 (dBm)
fRF = 1950MHz, 1951MHz
fLO = 1880MHz
fIF = 70MHz
PRFIN = -25dBm PER TONE
MAX2682
INPUT IP3 vs. LO POWER
MAX2680/1/2-15
LO POWER (dBm)
INPUT IP3 (dBm)
fRF = 1950MHz, 1951MHz
fLO = 1880MHz
fIF = 70MHz
PRFIN = -25dBm PER TONE
MAX2680
NOISE FIGURE vs. LO POWER
MAX2680/1/2-16
LO POWER (dBm)
NOISE FIGURE (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
2020MHz
2210MHz
fIF
70MHz
70MHz
70MHz
MAX2681
NOISE FIGURE vs. LO POWER
MAX2680/1/2-17
LO POWER (dBm)
NOISE FIGURE (dB)
fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
2020MHz
2210MHz
fIF
70MHz
70MHz
70MHz
MAX2682
NOISE FIGURE vs. LO POWER
MAX2680/1/2-18
LO POWER (dBm)
NOISE FIGURE (dB)fRF = 900MHz
fRF = 1950MHz
fRF = 2450MHz
fRF
900MHz
1950MHz
2450MHz
fLO
970MHz
2020MHz
2210MHz
fIF
70MHz
70MHz
70MHz
MAX2680
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2680/1/2-19
REAL IMPEDANCE (
IMAGINARY IMPEDANCE (W)
IMAGINARY
REALfLO = 970MHz
PLO = -5dBm
MAX2681
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2680/1/2-20
REAL IMPEDANCE (
IMAGINARY
REALfLO = 970MHz
PLO = -5dBm
IMAGINARY IMPEDANCE (
MAX2682
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2680/1/2-21
REAL IMPEDANCE (
IMAGINARY IMPEDANCE (IMAGINARY
REALfLO = 970MHz
PLO = -5dBm
MAX2680/MAX2681/
MAX2682
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Typical Operating Characteristics (continued)
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