19-4786; Rev 1; 11/98
UAL
IT MAN
TION K
A
HEET
EVALU
DATA S
LOWS
FOL
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Features
o
400MHz to 2.5GHz Operation
o
+2.7V to +5.5V Single-Supply Operation
o
Low Noise Figure: 6.3dB at 900MHz (MAX2680)
o
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)
o
<0.1µA Low-Power Shutdown Mode
o
Ultra-Small Surface-Mount Packaging
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 a
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 sin-
gle +2.7V to +5.5V supply, allowing them to be pow-
ered 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 performance. 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 cur-
rent.
The MAX2680/MAX2681/MAX2682 are manufactured
on a high-frequency, low-noise, advanced silicon-ger-
manium process and are offered in the space-saving
6-pin SOT23 package.
MAX2680/MAX2681/MAX2682
Ordering Information
PART
MAX2680EUT-T
MAX2681EUT-T
MAX2682EUT-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
SOT
PACKAGE
TOP MARK
6 SOT23-6
6 SOT23-6
6 SOT23-6
AAAR
AAAS
AAAT
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
GND
2
Pin Configuration
TOP VIEW
LO
1
6
SHDN
MAX2680
MAX2681
MAX2682
5
V
CC
RFIN
3
4
IFOUT
Typical Operating Circuit appears at end of data sheet.
SOT23-6
Selector Guide
FREQUENCY
PART
I
CC
(mA)
900MHz
IIP3
(dBm)
-12.9
-6.1
-1.8
NF
(dB)
6.3
7.0
6.5
GAIN
(dB)
11.6
14.2
14.7
IIP3
(dBm)
-8.2
+0.5
+4.4
1950MHz
NF
(dB)
8.3
11.1
10.2
GAIN
(dB)
7.6
8.4
10.4
IIP3
(dBm)
-6.9
+1.0
+3.2
2450MHz
NF
(dB)
11.7
12.7
13.4
GAIN
(dB)
7.0
7.7
7.9
1
MAX2680
MAX2681
MAX2682
5.0
8.7
15.0
________________________________________________________________
Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
MAX2680/MAX2681/MAX2682
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ..........................................................-0.3V to +6.0V
RFIN Input Power (50Ω Source).....................................+10dBm
LO Input Power (50Ω Source) ........................................+10dBm
SHDN,
IFOUT, RFIN to GND ......................-0.3V to (V
CC
+ 0.3V)
LO to GND..........................................(V
CC
- 1V) to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
SOT23-6 (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, 10sec) .............................+300°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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V,
SHDN
= +2V, T
A
= T
MIN
to T
MAX
unless otherwise noted. Typical values are at V
CC
= +3V and T
A
= +25°C.
Minimum and maximum values are guaranteed over temperature by design and characterization.)
PARAMETER
Operating Supply Current
Shutdown Supply Current
Shutdown Input Voltage High
Shutdown Input Voltage Low
Shutdown Input Bias Current
SYMBOL
MAX2680
I
CC
I
CC
V
IH
V
IL
I
SHDN
0 <
SHDN
< V
CC
0.2
MAX2681
MAX2682
SHDN
= 0.5V
2.0
0.5
CONDITIONS
MIN
TYP
5.0
8.7
15.0
0.05
MAX
7.7
12.7
21.8
5
µA
V
V
µA
mA
UNITS
AC ELECTRICAL CHARACTERISTICS
(MAX2680/1/2 EV Kit, V
CC
= SHDN = +3.0V, T
A
= +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. P
LO
= -5dBm,
P
RFIN
= -25dBm.)
PARAMETER
MAX2680
RF Frequency Range
LO Frequency Range
IF Frequency Range
(Notes 1, 2)
(Notes 1, 2)
(Notes 1, 2)
f
RF
= 400MHz, f
LO
= 445MHz, f
IF
= 45MHz
Conversion Power Gain
f
RF
= 900MHz, f
LO
= 970MHz, f
IF
= 70MHz
f
RF
= 1950MHz, f
LO
= 1880MHz, f
IF
= 70MHz (Note 1)
f
RF
= 2450MHz, f
LO
= 2210MHz, f
IF
= 240MHz
Gain Variation Over Temperature
Input Third-Order Intercept Point
(Note 3)
f
RF
= 1950MHz, f
LO
= 1880MHz, f
IF
= 70MHz,
T
A
= T
MIN
to T
MAX
(Note 1)
f
RF
= 900MHz, 901MHz, f
LO
= 970MHz, f
IF
= 70MHz
f
RF
= 1950MHz, 1951MHz, f
LO
= 1880MHz, f
IF
= 70MHz
f
RF
= 2450MHz, 2451MHz, f
LO
= 2210MHz, f
IF
= 240MHz
f
RF
= 900MHz, f
LO
= 970MHz, f
IF
= 70MHz
Noise Figure (Single Sideband)
LO Input VSWR
LO Leakage at IFOUT Port
LO Leakage at RFIN Port
IF/2 Spurious Response
2
f
RF
= 1950MHz, f
LO
= 2020MHz, f
IF
= 70MHz
f
RF
= 2450MHz, f
LO
= 2210MHz, f
IF
= 240MHz
50Ω source impedance
f
LO
= 1880MHz
f
LO
= 1880MHz
f
RF
= 1915MHz, f
LO
= 1880MHz, f
IF
= 70MHz (Note 4)
5.7
400
400
10
7.3
11.6
7.6
7.0
1.9
-12.9
-8.2
-6.9
6.3
8.3
11.7
1.5:1
-22
-26
-51
dBm
dBm
dBm
dB
dBm
2.4
dB
8.6
dB
2500
2500
500
MHz
MHz
MHz
CONDITIONS
MIN
TYP
MAX
UNITS
_______________________________________________________________________________________
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2680/1/2 EV Kit, V
CC
=
SHDN
= +3.0V, T
A
= +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. P
LO
= -5dBm,
P
RFIN
= -25dBm.)
PARAMETER
MAX2681
RF Frequency Range
LO Frequency Range
IF Frequency Range
(Notes 1, 2)
(Notes 1, 2)
(Notes 1, 2)
f
RF
= 400MHz, f
LO
= 445MHz, f
IF
= 45MHz
Conversion Power Gain
f
RF
= 900MHz, f
LO
= 970MHz, f
IF
= 70MHz
f
RF
= 1950MHz, f
LO
= 1880MHz, f
IF
= 70MHz (Note 1)
f
RF
= 2450MHz, f
LO
= 2210MHz, f
IF
= 240MHz
Gain Variation Over Temperature
Input Third-Order Intercept Point
(Note 3)
f
RF
= 1950MHz, f
LO
= 1880MHz, f
IF
= 70MHz,
T
A
= T
MIN
to T
MAX
(Note 1)
f
RF
= 900MHz, 901MHz, f
LO
= 970MHz, f
IF
= 70MHz
f
RF
= 1950MHz, 1951MHz, f
LO
= 1880MHz, f
IF
= 70MHz
f
RF
= 2450MHz, 2451MHz, f
LO
= 2210MHz, f
IF
= 240MHz
f
RF
= 900MHz, f
LO
= 970MHz, f
IF
= 70MHz
Noise Figure (Single Sideband)
LO Input VSWR
LO Leakage at IFOUT Port
LO Leakage at RFIN Port
IF/2 Spurious Response
MAX2682
RF Frequency Range
LO Frequency Range
IF Frequency Range
(Notes 1, 2)
(Notes 1, 2)
(Notes 1, 2)
f
RF
= 400MHz, f
LO
= 445MHz, f
IF
= 45MHz
Conversion Power Gain
f
RF
= 900MHz, f
LO
= 970MHz, f
IF
= 70MHz
f
RF
= 1950MHz, f
LO
= 1880MHz, f
IF
= 70MHz (Note 1)
f
RF
= 2450MHz, f
LO
= 2210MHz, f
IF
= 240MHz
Gain Variation Over Temperature
Input Third-Order Intercept Point
(Note 3)
f
RF
= 1950MHz, f
LO
= 1880MHz, f
IF
= 70MHz,
T
A
= T
MIN
to T
MAX
(Note 1)
f
RF
= 900MHz, 901MHz, f
LO
= 970MHz, f
IF
= 70MHz
f
RF
= 1950MHz, 1951MHz, f
LO
= 1880MHz, f
IF
= 70MHz
f
RF
= 2450MHz, 2451MHz, f
LO
= 2210MHz, f
IF
= 240MHz
f
RF
= 900MHz, f
LO
= 970MHz, f
IF
= 70MHz
Noise Figure (Single Sideband)
f
RF
= 1950MHz, f
LO
= 2020MHz, f
IF
= 70MHz
f
RF
= 2450MHz, f
LO
= 2210MHz, f
IF
= 240MHz
8.7
400
400
10
13.4
14.7
10.4
7.9
2.1
-1.8
+4.4
+3.2
6.5
10.2
13.4
dB
dBm
3.2
dB
11.7
dB
2500
2500
500
MHz
MHz
MHz
f
RF
= 1950MHz, f
LO
= 2020MHz, f
IF
= 70MHz
f
RF
= 2450MHz, f
LO
= 2210MHz, f
IF
= 240MHz
50Ω source impedance
f
LO
= 1880MHz
f
LO
= 1880MHz
f
RF
= 1915MHz, f
LO
= 1880MHz, f
IF
= 70MHz (Note 4)
6.7
400
400
10
11.0
14.2
8.4
7.7
1.7
-6.1
+0.5
+1.0
7.0
11.1
12.7
1.5:1
-23
-27
-65
dBm
dBm
dBm
dB
dBm
2.3
dB
9.4
dB
2500
2500
500
MHz
MHz
MHz
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2680/MAX2681/MAX2682
_______________________________________________________________________________________
3
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
MAX2680/MAX2681/MAX2682
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2680/1/2 EV Kit, V
CC
=
SHDN
= +3.0V, T
A
= +25°C, unless otherwise noted. RFIN and IFOUT matched to 50Ω. P
LO
= -5dBm,
P
RFIN
= -25dBm.)
PARAMETER
LO Input VSWR
LO Leakage at IFOUT Port
LO Leakage at RFIN Port
IF/2 Spurious Response
Note 1:
Note 2:
Note 3:
Note 4:
f
LO
= 1880MHz
f
LO
= 1880MHz
f
RF
= 1915MHz, f
LO
= 1880MHz, f
IF
= 70MHz (Note 4)
CONDITIONS
50Ω source impedance
MIN
TYP
1.5:1
-23
-27
-61
dBm
dBm
dBm
MAX
UNITS
Guaranteed by design and characterization.
Operation outside of this specification is possible, but performance is not characterized and is not guaranteed.
Two input tones at -25dBm per tone.
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 Characteristics
(Typical Operating Circuit, V
CC
=
SHDN
= +3.0V, P
RFIN
= -25dBm, P
LO
= -5dBm, T
A
= +25°C, unless otherwise noted.)
MAX2680
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-01
MAX2681
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-02
MAX2682
SUPPLY CURRENT vs. SUPPLY VOLTAGE
17
16
SUPPLY CURRENT (mA)
15
14
13
12
11
10
9
T
A
= +25°C
T
A
= -40°C
T
A
= +85°C
SHDN = V
CC
MAX2680/1/2-03
7
SHDN = V
CC
6
SUPPLY CURRENT (mA)
T
A
= +85°C
5
T
A
= +25°C
10
SHDN = V
CC
9
SUPPLY CURRENT (mA)
T
A
= +85°C
18
8
T
A
= +25°C
7
T
A
= -40°C
4
T
A
= -40°C
3
6
2
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
8
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Typical Operating Characteristics (continued)
(Typical Operating Circuit, V
CC
=
SHDN
= +3.0V, P
RFIN
= -25dBm, P
LO
= -5dBm, T
A
= +25°C, unless otherwise noted.)
MAX2680
SHUTDOWN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-04
MAX2680/MAX2681/MAX2682
MAX2681
SHUTDOWN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX2680/1/2-05
MAX2682
SHUTDOWN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
SHUTDOWN SUPPLY CURRENT (µA)
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
SHDN = GND
MAX2680/1/2-06
0.10
SHUTDOWN SUPPLY CURRENT (µA)
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
2.5
3.0
3.5
4.0
4.5
5.0
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
SHDN = GND
0.10
SHUTDOWN SUPPLY CURRENT (µA)
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
SHDN = GND
0.10
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
MAX2680
CONVERSION POWER GAIN vs. LO POWER
MAX2680/1/2-07
MAX2681
CONVERSION POWER GAIN vs. LO POWER
MAX2680/1/2-08
MAX2682
CONVERSION POWER GAIN vs. LO POWER
14
CONVERSION POWER GAIN (dB)
12
10
8
f
RF
= 2450MHz
6
4
2
0
f
RF
f
IF
f
LO
900MHz 970MHz 70MHz
1950MHz 1880MHz 70MHz
2450MHz 2210MHz 240MHz
-14
-12
-10
-8
-6
-4
-2
0
f
RF
= 900MHz
f
RF
= 1950MHz
MAX2680/1/2-09
15
13
CONVERSION POWER GAIN (dB)
11
f
RF
= 1950MHz
9
7
5
3
1
-1
-14
-12
-10
-8
-6
-4
-2
0
LO POWER (dBm)
f
RF
f
LO
f
IF
900MHz 970MHz 70MHz
1950MHz 1880MHz 70MHz
2450MHz 2210MHz 240MHz
f
RF
= 2450MHz
f
RF
= 900MHz
16
14
CONVERSION POWER GAIN (dB)
12
10
8
6
4
2
0
-14
-12
-10
-8
-6
-4
-2
0
LO POWER (dBm)
f
RF
= 2450MHz
f
RF
f
IF
f
LO
900MHz 970MHz 70MHz
1950MHz 1880MHz 70MHz
2450MHz 2210MHz 240MHz
f
RF
= 1950MHz
f
RF
= 900MHz
16
LO POWER (dBm)
MAX2680
CONVERSION POWER GAIN vs. TEMPERATURE
MAX2680/1/2-10
MAX2681
CONVERSION POWER GAIN vs. TEMPERATURE
MAX2680/1/2-11
MAX2682
CONVERSION POWER GAIN vs. TEMPERATURE
15
CONVERSION POWER GAIN (dB)
13
11
9
7
5
3
1
f
RF
= 2450MHz
f
RF
= 1950MHz
f
RF
= 900MHz
MAX2680/1/2-12
16
14
CONVERSION POWER GAIN (dB)
12
10
8
6
4
2
0
-40
-20
0
20
40
60
80
f
RF
= 2450MHz
f
RF
f
IF
f
LO
900MHz 970MHz 70MHz
1950MHz 1880MHz 70MHz
2450MHz 2210MHz 240MHz
f
RF
= 1950MHz
f
RF
= 900MHz
16
14
CONVERSION POWER GAIN (dB)
12
10
8
6
4
2
0
f
RF
= 2450MHz
f
RF
= 1950MHz
f
RF
= 900MHz
17
100
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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