Maxim MAX2663 400mhz to 2.5ghz upconverter mixer Datasheet

19-1382; Rev 1; 9/99
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400MHz to 2.5GHz Upconverter Mixers
These devices offer a wide range of supply currents and
output intercept levels to optimize system performance.
Supply current is essentially constant over the specified
supply voltage range. Additionally, when the devices are
in a typical configuration with V SHDN = 0, a shutdown
mode reduces the supply current to less than 1µA.
The MAX2660/MAX2661/MAX2663/MAX2671 are
offered in the space-saving 6-pin SOT23 package. For
applications requiring balanced IF ports, choose the
MAX2673 in the 8-pin µMAX package.
Features
♦ RF Output Frequencies: 400MHz to 2.5GHz
♦ Low Noise Figure: 9.3dB (900MHz, MAX2671)
♦ +2.7V to +5.5V Single Supply
♦ High Output Intercept Point (OIP3)
5.9dBm at 4.8mA (MAX2660)
7.1dBm at 8.3mA (MAX2661)
0.7dBm at 3.0mA (MAX2663)
9.6dBm at 11.8mA (MAX2671)
7.6dBm at 20.5mA (MAX2673)
♦ 1µA Shutdown Mode
♦ Ultra-Small Surface-Mount Packaging
Pin Configurations
TOP VIEW
LO 1
Applications
GND 2
400MHz/900MHz/2.4GHz ISM
Hand-Held Radios
MAX2660
MAX2661
MAX2663
MAX2671
IFIN 3
Wireless Local Area Networks (WLANs)
IEEE 802.11 and Wireless Data
6
SHDN
5
VCC
4
RFOUT
SOT23-6
Personal Communications Systems (PCS)
Cellular and Cordless Phones
LO 1
Ordering Information
PART
TEMP.
RANGE
PINPACKAGE
TOP
MARK
MAX2660EUT-T
-40°C to +85°C
6 SOT23-6
AAAF
MAX2661EUT-T
MAX2663EUT-T
MAX2671EUT-T
MAX2673EUA
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
6 SOT23-6
6 SOT23-6
6 SOT23-6
8 µMAX
AAAG
AAAL
AAAJ
—
8
IFIN+
7
IFIN-
3
6
GND
VCC 4
5
RFOUT
GND 2
MAX2673
SHDN
µMAX
Typical Operating Circuits and Functional Diagram appear at
end of data sheet.
Selector Guide
PART
ICC
(mA)
OUTPUT IP3 (dBm)
AT 900MHz
GAIN (dB)
AT 2450MHz
LO BUFFER
SINGLE-ENDED OR
DIFFERENTIAL IF
MAX2660
4.8
5.9
4.6
No
Single Ended
6 SOT23
MAX2661
8.3
7.1
8.2
No
Single Ended
6 SOT23
MAX2663
3.0
0.7
1.4
No
Single Ended
6 SOT23
MAX2671
11.8
9.6
8.9
Yes
Single Ended
6 SOT23
MAX2673
20.5
7.6
8.6
Yes
Differential
8 µMAX
PACKAGE
________________________________________________________________ Maxim Integrated Products
1
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.
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
General Description
The MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
miniature, low-cost, low-noise upconverter mixers are
designed for low-voltage operation and are ideal for
use in portable consumer equipment. Signals at the IF
input port are mixed with signals at the local oscillator
(LO) port using a double-balanced mixer. These
upconverter mixers operate with IF input frequencies
between 40MHz and 500MHz, and upconvert to output
frequencies as high as 2.5GHz.
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +6.0V
IFIN_ Input Power (50Ω source).....................................+10dBm
LO Input Power (50Ω source) ........................................+10dBm
SHDN, RFOUT, IFIN_, LO to GND..............-0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW
6-Pin 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
(VCC = +2.7V to +5.5V, SHDN = +2V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = SHDN = +3.0V,
TA = +25°C. Minimum and maximum values are guaranteed over temperature by design and characterization.)
PARAMETER
Operating Supply Current
(LO and IFIN_ Unconnected)
Shutdown Supply Current
SYMBOL
ICC
ICC
CONDITIONS
MIN
TYP
MAX
MAX2660
4.8
6.6
MAX2661
8.3
11.3
MAX2663
3.0
4.1
MAX2671
11.8
16.6
MAX2673
20.5
26.8
SHDN = GND, MAX2660
0.1
SHDN = GND, MAX2661
0.2
SHDN = GND, MAX2663
0.1
SHDN = GND, MAX2671
0.2
SHDN = GND, MAX2673
0.8
5
SHDN = 0.5V, VCC = 3.6V to 5.5V
15
VIH
2
Shutdown Input Voltage Low
VIL
0
Shutdown Input Bias Current
IIN
-5
VCC
0.2
mA
µA
SHDN = 0.5V, VCC = 2.7V to 3.6V
Shutdown Input Voltage High
UNITS
V
0.5
V
5
µA
AC ELECTRICAL CHARACTERISTICS
(VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2660 (PLO = -5dBm, PIFIN = -30dBm, Circuit of Figure 1)
Conversion Gain
Gain Variation Over
Temperature
Output Third-Order
Intercept
2
fIF = 45MHz, fLO = 445MHz, fRF = 400MHz
7.0
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
7.0
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
3.9
5.9
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
4.6
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz,
TA = -40°C to +85°C
±1.2
TBD
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
5.9
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
5.7
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
4.1
_______________________________________________________________________________________
8.1
±1.6
dB
dB
dBm
400MHz to 2.5GHz Upconverter Mixers
(VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2660 (PLO = -5dBm, PIFIN = -30dBm, Circuit of Figure 1) (continued)
Output 1dB
Compression Point
Noise Figure
(Single Sideband)
LO Emission from RF Port
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-8.4
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-10.8
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-11.4
fIF = 70MHz, fLO = 970MHz, fRF = 1900MHz
9.9
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
11.8
fIF = 350MHz, fLO = 2100MHz, fRF = 2450MHz
11.9
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-22.0
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-20.7
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-22.5
dBm
dB
dBm
Maximum LO Input VSWR
f = 600MHz to 2500MHz, 50Ω source impedance
2.2
Maximum Output Spurious
Emissions
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz (Note 1)
-70
dBm
Turn-On Time
(Note 2)
2
µs
Turn-Off Time
From SHDN low to ICC < 100µA
2
µs
MAX2661 (PLO = -5dBm, PIFIN = -30dBm, Circuit of Figure 1)
Conversion Gain
fIF = 45MHz, fLO = 445MHz, fRF = 400MHz
10.2
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
10.7
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
Gain Variation Over
Temperature
Output Third-Order Intercept
Output 1dB
Compression Point
Noise Figure
(Single Sideband)
LO Emission from RF Port
7.0
8.5
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
8.2
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz,
TA = -40°C to +85°C
±1.2
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
7.1
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
6.0
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
7.3
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-6.0
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-7.2
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-6.2
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
9.8
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
11.6
fIF = 350MHz, fLO = 2100MHz, fRF = 2450MHz
11.8
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-22.9
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-21.6
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-23.5
Maximum LO Input VSWR
f = 600MHz to 2500MHz, 50Ω source impedance
Maximum Output Spurious
Emissions
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz (Note 1)
Turn-On Time
Turn-Off Time
10.2
±1.5
dB
dB
dBm
dBm
dB
dBm
2.2
-57.3
dBm
(Note 2)
2
µs
From SHDN low to ICC < 100µA
2
µs
_______________________________________________________________________________________
3
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
AC ELECTRICAL CHARACTERISTICS (continued)
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
AC ELECTRICAL CHARACTERISTICS (continued)
(VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2663 (PLO = -5dBm, PIFIN = -30dBm, Circuit of Figure 1)
Conversion Gain
Gain Variation Over
Temperature
Output Third-Order Intercept
Output 1dB
Compression Point
Noise Figure
(Single Sideband)
LO Emission from RF Port
fIF = 45MHz, fLO = 445MHz, fRF = 400MHz
2.0
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
3.4
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-0.1
2.1
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
1.4
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz,
TA = -40°C to +85°C
±1.1
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
0.7
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-1.4
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-2.8
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-12.3
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-13.3
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-14.3
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
10.7
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
12.2
fIF = 350MHz, fLO = 2100MHz, fRF = 2450MHz
12.7
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-22.7
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-21.0
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-21.6
4.2
±1.8
dB
dB
dBm
dBm
dB
dBm
Maximum LO Input VSWR
f = 600MHz to 2500MHz, 50Ω source impedance
2.1
Maximum Output Spurious
Emissions
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz (Note 1)
-67
dBm
Turn-On Time
(Note 2)
2
µs
Turn-Off Time
From SHDN low to ICC < 100µA
2
µs
MAX2671 (PLO = -10dBm, PIFIN = -30dBm, Circuit of Figure 1)
Conversion Gain
Gain Variation Over
Temperature
Output Third-Order Intercept
Output 1dB
Compression Point
4
fIF = 45MHz, fLO = 445MHz, fRF = 400MHz
10.0
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
11.2
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
6.7
9.3
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
8.9
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz,
TA = -40°C to +85°C
±1.1
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
9.6
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
8.3
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
9.4
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-5.5
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-6.4
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-6.0
_______________________________________________________________________________________
11.9
±1.3
dB
dB
dBm
dBm
400MHz to 2.5GHz Upconverter Mixers
(VCC = SHDN = +3.0V, TA = +25°C, unless otherwise noted. Minimum and maximum values are guaranteed by design and
characterization.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2671 (PLO = -10dBm, PIFIN = -30dBm, Circuit of Figure 1) (continued)
Noise Figure
(Single Sideband)
LO Emission from RF Port
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
9.3
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
10.7
fIF = 350MHz, fLO = 2100MHz, fRF = 2450MHz
11.3
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-40.3
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-35.7
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-36.8
dB
dBm
Maximum LO Input VSWR
f = 600MHz to 2500MHz, 50Ω source impedance
2.2
dBm
Maximum Output Spurious
Emissions
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz (Note 1)
-56
dBm
Turn-On Time
(Note 2)
2
µs
Turn-Off Time
From SHDN low to ICC < 100µA
2
µs
MAX2673 (PLO = -10dBm, PIFIN_ = -30dBm, Circuit of Figure 2)
12.6
fIF = 45MHz, fLO = 445MHz, fRF = 400MHz
12.3
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
Conversion Gain
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
Gain Variation Over
Temperature
Output Third-Order Intercept
Output 1dB
Compression Point
Noise Figure
(Single Sideband)
LO Emission from RF Port
7.8
9.2
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
8.6
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz,
TA = -40°C to +85°C
±1.0
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
7.6
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
5.9
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
4.5
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-2.1
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-5.9
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-8.3
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
9.7
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
10.1
fIF = 350MHz, fLO = 2100MHz, fRF = 2450MHz
10.4
fIF = 70MHz, fLO = 970MHz, fRF = 900MHz
-29.4
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz
-27.9
fIF = 240MHz, fLO = 2210MHz, fRF = 2450MHz
-26.6
Maximum LO Input VSWR
f = 600MHz to 2500MHz, 50Ω source impedance
Maximum Output Spurious
Emissions
fIF = 70MHz, fLO = 1830MHz, fRF = 1900MHz (Note 1)
Turn-On Time
Turn-Off Time
10.6
±1.4
dB
dB
dBm
dBm
dB
dBm
2.2
-59.7
dBm
(Note 2)
2
µs
From SHDN low to ICC < 100µA
2
µs
Note 1: Excluding LO harmonics and products of LO harmonics by first-order IF.
Note 2: From SHDN high to output within 1dB of final output power, fRF = 900MHz, fIF = 70MHz.
_______________________________________________________________________________________
5
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
AC ELECTRICAL CHARACTERISTICS (continued)
__________________________________________Typical Operating Characteristics
(VCC = SHDN = +3.0V, Typical Operating Circuits, PLO = -5dBm (MAX2660/MAX2661/MAX2663), PLO = -10dBm (MAX2671/MAX2673),
PIFIN = -30dBm, TA = +25°C, unless otherwise noted.)
MAX2660
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
4.0
3.5
3.0
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6
5
TA = +85°C
4
TA = +25°C
3
2
10
MAX2660-04
fRF = 900MHz
7
5
4
fRF = 1900MHz
fRF = 2450MHz
3
2
1
fIF
fRF
900MHz fIF = fLO - fRF
1900MHz fIF = fRF - fLO
2450MHz fIF = fRF - fLO
0
-1
0
MAX2660
IF PORT IMPEDANCE vs. IF FREQUENCY
450
fRF = 2450MHz
0
-5
fIF
fLO
fRF
900MHz 970MHz 70MHz
1900MHz 1830MHz 70MHz
2450MHz 2210MHz 240MHz
-20
250
-300
200
150
-400
100
REAL
100
200
300
IF FREQUENCY (MHz)
400
-500
500
1500
MAX2660-03
2000
2500
0
-5
0
5
-4
-6
-8
-10
-12
-14
-16
-18
-20
300
10
840
1380
1920
2460
MAX2660
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2660
LO-to-RF AND RF-to-LO ISOLATION
vs. LO OR RF FREQUENCY
MAX2660-08
IMAGINARY
-100
25
-200
24
-300
23
-400
600
500
-500
400
-600
300
-700
200
-800
-900
REAL
0
0
3000
-2
LO FREQUENCY (MHz)
100
0
1000
LO POWER (dBm)
700
REAL IMPEDANCE (Ω)
-200
300
IMAGINARY IMPEDANCE (Ω)
350
0
-10
800
-100
50
-15
900
IMAGINARY
400
6
0
500
MAX2660
LO PORT RETURN LOSS vs. FREQUENCY
fRF = 900MHz
-25
0
5.5
MAX2660
CONVERSION GAIN vs. LO POWER
IF FREQUENCY (MHz)
MAX2660-07
5.0
-15
50 100 150 200 250 300 350 400 450 500
500
4.5
fIF
45MHz
70MHz
70MHz
240MHz
fRF
fRF = fLO - fIF
fRF = fLO - fIF
fRF = fLO + fIF
fRF = fLO + fIF
RF FREQUENCY (MHz)
-10
-2
4.0
5.5V
SUPPLY VOLTAGE (V)
fRF = 1900MHz
5
CONVERSION GAIN (dB)
CONVERSION GAIN (dB)
6
3.5
RF MATCH
400MHz
900MHz
1900MHz
2450MHz
-4
-8
3.0
5.5V
5.5V
-2
-10
2.5
5.5V
0
0
MAX2660
CONVERSION GAIN vs. IF FREQUENCY
8
2
1
VCC (V)
2.7V
4
-6
TA = -40°C
2.7V
500
1000
1500
2000
RF FREQUENCY (MHz)
2500
-1000
3000
3000
MAX2660-09
TA = -40°C
CONVERSION GAIN (dB)
4.5
7
2.7V
2.7V
6
RETURN LOSS (dB)
TA = +25°C
8
8
IMAGINARY IMPEDANCE (Ω)
ISOLATION (dB)
ICC (mA)
5.0
10
MAX2660-02
TA = +85°C
SHDN = GND
9
MAX2660-05
5.5
10
SHUTDOWN SUPPLY CURRENT (µA)
MAX2660-01
6.0
MAX2660
CONVERSION GAIN vs. RF FREQUENCY
MAX2660-06
MAX2660
SUPPLY CURRENT vs. SUPPLY VOLTAGE
REAL IMPEDANCE (Ω)
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
RF-to-LO ISOLATION
POWER INTO RF PORT = -25dBm
22
21
20
19
18
17
16
LO-to-RF ISOLATION
POWER INTO LO PORT = -5dBm
15
500
1000
1500
2000
LO OR RF FREQUENCY (MHz)
_______________________________________________________________________________________
2500
400MHz to 2.5GHz Upconverter Mixers
fRF = 2450MHz
-30
fIF
fLO
fRF
900MHz 970MHz 70MHz
1900MHz 1830MHz 70MHz
2450MHz 2210MHz 240MHz
-50
-50
TA = -40°C
7.5
6.5
-40
-30
-20
-10
MAX2661toc02
7
6
TA = +85°C
5
4
TA = +25°C
3
TA = -40°C
2
1
0
2.5
0
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
3.5
4.0
4.5
5.0
IF INPUT POWER (dBm)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
MAX2661
CONVERSION GAIN vs. RF FREQUENCY
MAX2661
CONVERSION GAIN vs. IF FREQUENCY
MAX2661
CONVERSION GAIN vs. LO POWER
6
VCC = 2.7V
VCC = 2.7V
RF MATCH
400MHz
900MHz
1900MHz
2450MHz
0
-2
-4
0
500
1000
fRF
fRF = fLO - fIF
fRF = fLO - fIF
fRF = fLO + fIF
fRF = fLO + fIF
1500
2000
fIF
45MHz
70MHz
70MHz
240MHz
2500
10
8
fRF = 2450MHz
6
fRF = 1900MHz
4
fIF
fRF
900MHz fIF = fLO - fRF
1900MHz fIF = fRF - fLO
2450MHz fIF = fRF - fLO
2
15
fRF = 900MHz
10
fRF = 1900MHz
5
fRF = 2450MHz
0
fLO
970MHz
1830MHz
2210MHz
fRF
900MHz
1900MHz
2450MHz
-5
0
3000
5.5
MAX2661toc05
fRF = 900MHz
CONVERSION GAIN (dB)
8
4
12
MAX2661toc04
VCC = 5.5V
CONVERSION GAIN (dB)
fIF
70MHz
70MHz
240MHz
-10
0
50 100 150 200 250 300 350 400 450 500
-25
-20
-15
-10
-5
0
5
10
RF FREQUENCY (MHz)
IF FREQUENCY (MHz)
LO POWER (dBm)
MAX2661
LO PORT RETURN LOSS vs. FREQUENCY
MAX2661
IF PORT IMPEDANCE vs. IF FREQUENCY
MAX2661
RF PORT IMPEDANCE vs. RF FREQUENCY
0
700
REAL IMPEDANCE (Ω)
-2
-4
-6
-8
MAX2661toc07
800
MAX2661toc06
2
600
0
900
-50
800
-100
IMAGINARY
500
-150
REAL IMPEDANCE (Ω)
CONVERSION GAIN (dB)
8.0
7.0
10
RETURN LOSS (dB)
TA = +25°C
8.5
SHDN = GND
8
6.0
12
2
9.0
9
600
-400
500
-500
400
-600
300
-700
300
-250
200
-300
-16
100
-350
100
-18
0
-400
50 100 150 200 250 300 350 400 450 500
0
-14
250
800
1350
1900
LO FREQUENCY (MHz)
2450
3000
REAL
0
IF FREQUENCY (MHz)
-200
IMAGINARY
-300
-200
-12
-100
700
400
-10
MAX2661toc08
200
-800
-900
REAL
0
500
1000
1500
2000
2500
-1000
3000
RF FREQUENCY (MHz)
_______________________________________________________________________________________
7
IMAGINARY IMPEDANCE (Ω)
OUTPUT POWER
-20 fRF = 1900MHz
TA = +85°C
10
SHUTDOWN SUPPLY CURRENT (µA)
fRF = 900MHz
-40
9.5
SUPPLY CURRENT (mA)
0 fRF = 900MHz
fRF = 1900MHz fRF = 2450MHz
MAX2661toc01
CONVERSION GAIN
-10
10.0
MAX2660-10
10
MAX2661
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2661
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2661toc03
OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)
MAX2660
CONVERSION GAIN AND OUTPUT
POWER vs. IF INPUT POWER
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
Typical Operating Characteristics (continued)
(VCC = SHDN = +3.0V, Typical Operating Circuits, PLO = -5dBm (MAX2660/MAX2661/MAX2663), PLO = -10dBm (MAX2671/MAX2673),
PIFIN = -30dBm, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
22
LO-TO-RF ISOLATION
POWER INTO LO PORT = -5dBm
20
18
16
fLO
970MHz
1830MHz
2210MHz
fRF
900MHz
1900MHz
2450MHz
14
12
fIF
70MHz
70MHz
240MHz
10
500 750 1000 1250 1500 1750 2000 2250 2500
-15
fRF = 2450MHz
-20
fIF
fLO
fRF
900MHz 970MHz 70MHz
1900MHz 1830MHz 70MHz
2450MHz 2210MHz 240MHz
-25
-30
MAX2663toc1
TA = +25°C
2.5
TA = -40°C
2.0
1.5
1.0
-35
-30
-25 -20 -15
-10
-5
2.5
0
3.0
3.5
4.0
4.5
5.0
5.5
MAX2663
CONVERSION GAIN vs. RF FREQUENCY
MAX2663
CONVERSION GAIN vs. IF FREQUENCY
5
4
TA = +85°C
3
2
0
-2
VCC = +5.5V
fRF
RF MATCH
400MHz fRF = fLO - fIF
900MHz fRF = fLO - fIF
1900MHz fRF = fLO + fIF
2450MHz fRF = fLO + fIF
-4
-6
TA = +25°C
2
TA = -40°C
-8
-10
0
3.0
3.5
4.0
4.5
5.0
0
5.5
500
1000
1500
2000
fIF
45MHz
70MHz
70MHz
240MHz
MAX2663toc04
VCC = +2.7V
4
fRF = 900MHz
3
2
CONVERSION GAIN (dB)
6
4
MAX2663toc03
6
CONVERSION GAIN (dB)
7
1
fRF = 2450MHz
0
-1
fRF = 1900MHz
-2
-3
fIF
fRF
900MHz fIF = fLO - fRF
1900MHz fIF = fRF - fLO
2450MHz fIF = fRF - fLO
-4
-5
-6
2500
3000
0
100
200
300
400
500
SUPPLY VOLTAGE (V)
RF FREQUENCY (MHz)
IF FREQUENCY (MHz)
MAX2663
CONVERSION GAIN vs. LO POWER
MAX2663
LO PORT RETURN LOSS vs. LO FREQUENCY
MAX2663
IF PORT IMPEDANCE vs. IF FREQUENCY
4
0
fRF = 2450MHz
-4
fRF
900MHz
1900MHz
2450MHz
-6
-8
-2
RETURN LOSS (dB)
fRF = 1900MHz
0
fLO
970MHz
1830MHz
2210MHz
fIF
70MHz
70MHz
240MHz
-4
-6
-8
-10
-12
-14
-15
-10
-5
LO POWER (dBm)
0
5
10
IMAGINARY
700
-200
600
-300
500
-400
400
-500
300
-600
200
-700
-800
REAL
0
-18
-20
250
700
1150
1600
LO FREQUENCY (MHz)
2050
2500
0
-100
800
100
-16
-10
MAX2663toc07
900
REAL IMPEDANCE (Ω)
fRF = 900MHz
-2
2
MAX2663toc05
6
-25
3.0
MAX2663
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SHDN = GND
2.5
OUTPUT POWER
fRF = 1900MHz
-40 -35
MAX2663toc02
SHUTDOWN SUPPLY CURRENT (µA)
-10
TA = +85°C
SUPPLY VOLTAGE (V)
1
8
fRF = 1900MHz
fRF = 900MHz
-5
3.5
IF INPUT POWER (dBm)
8
2
0
fRF = 2450MHz
LO OR RF FREQUENCY (MHz)
10
9
fRF = 900MHz
5
4.0
-900
0
100
200
300
IF FREQUENCY (MHz)
_______________________________________________________________________________________
400
500
IMAGINARY IMPEDANCE (Ω)
24
CONVERSION GAIN
10
MAX2663toc06
ISOLATION (dB)
26
15
MAX2663
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT (mA)
RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm
28
MAX2661
CONVERSION GAIN AND OUTPUT
POWER vs. IF INPUT POWER
MAX2661toc10
30
MAX2661toc09
MAX2661
LO-to-RF AND RF-TO-LO ISOLATION
vs. LO OR RF FREQUENCY
OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)
(VCC = SHDN = +3.0V, Typical Operating Circuits, PLO = -5dBm (MAX2660/MAX2661/MAX2663), PLO = -10dBm (MAX2671/MAX2673),
PIFIN = -30dBm, TA = +25°C, unless otherwise noted.)
CONVERSION GAIN (dB)
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
400MHz to 2.5GHz Upconverter Mixers
-400
500
-500
400
-600
300
-700
-800
200
100
0
500
1000
1500
2000
LO-TO-RF ISOLATION
POWER INTO LO PORT = -5dBm
20
15
10
-1000
2500
fLO
970MHz
1830MHz
2210MHz
fRF
900MHz
1900MHz
2450MHz
5
-900
REAL
0
25
ISOLATION (dB)
600
RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm
30
0
500
1000
fIF
70MHz
70MHz
240MHz
1500
2000
CONVERSION GAIN
fRF = 900MHz
0
-5
fRF = 2450MHz
fRF = 1900MHz
-10
-15
fRF = 900MHz
-20
-25
fRF = 1900MHz
-30
-35
OUTPUT
POWER
fRF = 2450MHz
fIF
fLO
fRF
900MHz 970MHz 70MHz
1900MHz 1830MHz 70MHz
2450MHz 2210MHz 240MHz
-40
-45
-50
-50 -45 -40 -35 -30 -25 -20 -15 -10 -5
2500
0
IF INPUT POWER (dBm)
MAX2671
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2671
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX2671
CONVERSION GAIN vs. RF FREQUENCY
TA = -40°C
11
10
9
8
7
6
5
TA = +85°C
4
TA = +25°C
3
2
TA = -40°C
0
2.5
3.0
3.5
4.0
4.5
5.0
0
3.0
3.5
4.0
4.5
5.0
5.5
0
500
1000
fRF
fRF = fLO - fIF
fRF = fLO - fIF
fRF = fLO + fIF
fRF = fLO + fIF
1500
2000
fIF
45MHz
70MHz
70MHz
240MHz
2500
3000
MAX2671
CONVERSION GAIN vs. IF FREQUENCY
MAX2671
CONVERSION GAIN vs. LO POWER
MAX2671
LO PORT RETURN LOSS vs. LO FREQUENCY
fIF
fRF
900MHz fIF = fLO - fRF
1900MHz fIF = fRF - fLO
2450MHz fIF = fRF - fLO
0
50 100 150 200 250 300 350 400 450 500
fRF = 900MHz
6
fRF = 1900MHz
4
fRF = 2450MHz
0
-2
-4
-6
-8
fRF
900MHz
1900MHz
2450MHz
fLO
970MHz
1830MHz
2210MHz
fIF
70MHz
70MHz
240MHz
MAX2671toc06
MAX2671toc05
8
2
2
0
-2
RETURN LOSS (dB)
4
10
CONVERSION GAIN (dB)
fRF = 1900MHz
IF FREQUENCY (MHz)
12
MAX2671toc04
fRF = 2450MHz
0
RF MATCH
400MHz
900MHz
1900MHz
2450MHz
RF FREQUENCY (MHz)
10
2
VCC = +2.7V
2
SUPPLY VOLTAGE (V)
fRF = 900MHz
6
4
SUPPLY VOLTAGE (V)
12
8
6
-4
2.5
5.5
8
-2
1
8
VCC = +5.5V
10
CONVERSION GAIN (dB)
TA = +25°C
SHDN = GND
9
12
MAX2671toc02
12
MAX2671toc01
13
TA = +85°C
10
MAX2671toc03
LO AND RF FREQUENCY (MHz)
14
CONVERSION GAIN (dB)
10
5
RF FREQUENCY (MHz)
SHUTDOWN SUPPLY CURRENT (µA)
REAL IMPEDANCE (Ω)
-300
IMAGINARY IMPEDANCE (Ω)
IMAGINARY
700
SUPPLY CURRENT (mA)
35
-200
MAX2663
CONVERSION GAIN AND OUTPUT
POWER vs. IF INPUT POWER
MAX2663toc10
-100
800
OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)
MAX2663toc08
900
MAX2663toc09
MAX2663
LO-TO-RF AND RF-TO-LO ISOLATION
vs. LO AND RF FREQUENCY
MAX2663
RF PORT IMPEDANCE vs. RF FREQUENCY
-4
-6
-8
-10
-12
-14
-16
-18
-35 -30 -25 -20 -15 -10
-5
LO INPUT POWER (dBm)
0
5
10
250
800
1350
1900
2450
3000
LO FREQUENCY (MHz)
_______________________________________________________________________________________
9
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
Typical Operating Characteristics (continued)
(VCC = SHDN = +3.0V, Typical Operating Circuits, PLO = -5dBm (MAX2660/MAX2661/MAX2663), PLO = -10dBm (MAX2671/MAX2673),
PIFIN = -30dBm, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = SHDN = +3.0V, Typical Operating Circuits, PLO = -5dBm (MAX2660/MAX2661/MAX2663), PLO = -10dBm (MAX2671/MAX2673),
PIFIN = -30dBm, TA = +25°C, unless otherwise noted.)
600
-100
500
-150
400
-200
-400
300
-500
200
-600
-350
100
-700
-400
500
0
-300
REAL
200
300
400
2000
2500
22
RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm
20
-800
3000
18
500
1000
1500
2000
2500
OUTPUT POWER
fIF
fLO
fRF
900MHz 970MHz 70MHz
1900MHz 1830MHz 70MHz
2450MHz 2210MHz 240MHz
-40
-50
-50 -45 -40 -35 -30 -25 -20 -15 -10 -5
22
TA = +85°C
21
TA = +25°C
20
19
TA = -40°C
18
10
SHUTDOWN SUPPLY CURRENT (µA)
fRF = 900MHz
-30
23
SUPPLY CURRENT (mA)
fRF = 2450MHz
fRF = 1900MHz
24
MAX2673toc01
CONVERSION GAIN
17
SHDN = GND
8
7
6
TA = +85°C
5
4
TA = -40°C
3
2
TA = +25°C
1
0
16
0
9
MAX2673toc02
MAX2673
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
fRF = 2450MHz
2.5
3.0
3.5
4.0
4.5
5.0
2.5
5.5
3.0
3.5
4.0
4.5
5.0
IF INPUT POWER (dBm)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
MAX2673
CONVERSION GAIN vs. RF FREQUENCY
MAX2673
CONVERSION GAIN vs. IF FREQUENCY
MAX2673
CONVERSION GAIN vs. LO POWER
10
8
6
VCC = +5.5V
4
fRF
RF MATCH
400MHz fRF = fLO - fIF
900MHz fRF = fLO - fIF
1900MHz fRF = fLO + fIF
2450MHz fRF = fLO + fIF
2
0
-2
500
1000
1500
2000
RF FREQUENCY (MHz)
fIF
45MHz
70MHz
70MHz
240MHz
2500
3000
12
fRF = 1900MHz
10
8
fRF = 2450MHz
6
4
fIF
fRF
900MHz fIF = fLO - fRF
1900MHz fIF = fRF - fLO
2450MHz fIF = fRF - fLO
2
0
-2
0
14
50 100 150 200 250 300 350 400 450 500
IF FREQUENCY (MHz)
5.5
MAX2673toc05
VCC = +2.7V
fRF = 900MHz
12
CONVERSION GAIN (dB)
12
14
MAX2673toc04
VCC = +2.7V
CONVERSION GAIN (dB)
14
10
1500
24
MAX2673
SUPPLY CURRENT vs. SUPPLY VOLTAGE
fRF = 900MHz
0
1000
26
MAX2671
CONVERSION GAIN AND OUTPUT
POWER vs. IF INPUT POWER
10
-20
500
28
LO AND RF FREQUENCY (MHz)
fRF = 1900MHz
-10
0
30
RF FREQUENCY (MHz)
20
0
REAL
LO-TO-RF ISOLATION
POWER INTO LO PORT = -10dBm
IF FREQUENCY (MHz)
MAX2671toc10
OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)
100
32
400
200
0
-200
-300
-250
0
34
500
300
100
IMAGINARY
-100
ISOLATION (dB)
600
MAX2671toc08
IMAGINARY IMPEDANCE (Ω)
-50
REAL IMPEDANCE (Ω)
IMAGINARY
700
MAX2673toc03
REAL IMPEDANCE (Ω)
700
0
IMAGINARY IMPEDANCE (Ω)
MAX2671toc07
800
MAX2671
LO-TO-RF AND RF-TO-LO ISOLATION
vs. LO or RF FREQUENCY
MAX2671
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2671toc09
MAX2671
IF PORT IMPEDANCE vs. IF FREQUENCY
CONVERSION GAIN (dB)
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
fRF = 900MHz
10
8
fRF = 2450MHz
6
fRF = 1900MHz
4
fRF
900MHz
1900MHz
2450MHz
2
0
-25
-20
-15
-10
fLO
970MHz
1830MHz
2210MHz
-5
LO POWER (dBm)
______________________________________________________________________________________
fIF
70MHz
70MHz
240MHz
0
5
10
400MHz to 2.5GHz Upconverter Mixers
-2
50
0
600
REAL
REAL IMPEDANCE (Ω)
RETURN LOSS (dB)
-4
MAX2673toc07
700
MAX2673toc06
0
MAX2673
IF PORT IMPEDANCE vs. IF FREQUENCY
-6
-8
-10
-12
-14
500
-50
400
-100
300
-150
200
-200
-16
IMAGINARY
-20
0
250
800
1350
1900
2450
3000
0
-300
50 100 150 200 250 300 350 400 450 500
IF FREQUENCY (MHz)
MAX2673
RF PORT IMPEDANCE vs. RF FREQUENCY
MAX2673
LO-to-RF ISOLATION AND RF-to-LO ISOLATION
vs. LO OR RF FREQUENCY
45
-100
40
IMAGINARY
250
-200
200
-300
150
-400
100
-500
0
0
500
1000
1500
2000
2500
25
20
15
RF-TO-LO ISOLATION
POWER INTO RF PORT = -25dBm
10
-600
REAL
30
5
-700
3000
0
500
900
OUTPUT POWER (dBm) AND CONVERSION GAIN (dB)
RF FREQUENCY (MHz)
1300
1700
2100
2500
LO OR RF FREQUENCY (MHz)
MAX2673
CONVERSION GAIN AND OUTPUT
POWER vs. IF INPUT POWER
20
MAX2673toc10
50
LO-TO-RF ISOLATION
POWER INTO LO PORT = -10dBm
35
ISOLATION (dB)
300
0
IMAGINARY IMPEDANCE (Ω)
MAX2673toc08
MAX2673toc09
LO FREQUENCY (MHz)
350
REAL IMPEDANCE (Ω)
-250
100
-18
IMAGINARY IMPEDANCE (Ω)
MAX2673
LO PORT RETURN LOSS vs. LO FREQUENCY
CONVERSION GAIN
fRF = 900MHz
10
0
-10
-20
fRF = 1900MHz
fRF = 2450MHz
fRF = 900MHz
fRF = 1900MHz
OUTPUT POWER
fRF = 2450MHz
-30
-40
fIF
fLO
fRF
900MHz 970MHz 70MHz
1900MHz 1830MHz 70MHz
2450MHz 2210MHz 240MHz
-50
-40 -45 -40 -35 -30 -25 -20 -15 -10 -5
0
IF INPUT POWER (dBm)
______________________________________________________________________________________
11
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
Typical Operating Characteristics (continued)
(VCC = SHDN = +3.0V, Typical Operating Circuits, PLO = -5dBm (MAX2660/MAX2661/MAX2663), PLO = -10dBm (MAX2671/MAX2673),
PIFIN = -30dBm, TA = +25°C, unless otherwise noted.)
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
Pin Description
PIN
MAX2660
MAX2661
MAX2663
MAX2671
MAX2673
1
12
NAME
FUNCTION
1
LO
Local-Oscillator Input. Apply a local-oscillator signal with an amplitude of -10dBm to
+5dBm for the MAX2671/MAX2673 or -5dBm to +2dBm for the MAX2660/ MAX2661/
MAX2663. AC-couple to the oscillator with a DC blocking capacitor. Nominal DC voltage is VCC - 0.4V to VCC - 1.0V.
2
2, 6
GND
Mixer Ground. Connect to the ground plane with a low-inductance connection.
3
7, 8
IFIN
Intermediate Frequency Input. AC-couple to the input signal with a DC blocking
capacitor. Nominal DC voltage is 1.37V.
4
5
RFOUT
Radio Frequency Output. Open-collector output requires an inductor to VCC that is
part of an impedance-matching network. AC-couple to this pin using a blocking
capacitor that can be part of the impedance-matching network. See Applications
Information for details on impedance matching.
5
4
VCC
Voltage Supply Rail, +2.7V to +5.5V. Bypass with a capacitor to the ground plane.
Capacitor value depends on desired operating frequency.
6
3
SHDN
Active-Low Shutdown Pin. Drive low to deactivate all part functions and reduce the
supply current to less than 1µA. For normal operation, drive high or connect to VCC.
______________________________________________________________________________________
400MHz to 2.5GHz Upconverter Mixers
Power Supply and SHDN Bypassing
The MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
are 2.5GHz double-balanced upconverter mixers
designed to provide optimum linearity performance for
a specified supply current. These upconverter mixers
use single-ended RF, LO, and IF port connections,
except for the MAX2673, which uses a differential IF
port. An on-chip bias cell provides a low-power shutdown feature. See the Selector Guide for device features and comparison.
Proper attention to supply bypassing is essential for a
high-frequency RF circuit. Bypass V CC with a 10µF
capacitor in parallel with an RF capacitor (Table 2). Use
separate vias to the ground plane for each of the
bypass capacitors and minimize trace length to reduce
inductance. Use separate vias to the ground plane for
each ground pin. Use low-inductance ground connections.
Decouple SHDN with a 100pF capacitor to ground to
minimize noise on the internal bias cell. Use a series
resistor (typically 100Ω) to reduce coupling of high-frequency signals into the SHDN pin.
__________Applications Information
Local-Oscillator (LO) Input
The LO input is a single-ended broadband port with a
return loss of better than 8dB from 600MHz to 2.5GHz.
The LO signal is mixed with the input IF signal, and the
resulting upconverted output appears on the RFOUT
pin. AC-couple the LO pin with a capacitor having less
than 3Ω reactance at the LO frequency. The
MAX2671/MAX2673 include an internal LO buffer and
require an LO signal ranging from -10dBm to +5dBm,
while the MAX2660/MAX2661/MAX2663 require an LO
signal ranging from -5dBm to +2dBm.
IF Input
The MAX2660/MAX2661/MAX2663/MAX2671 have a
single-ended IF input port, while the MAX2673 has a
differential IF input port for high-performance interfaceto-differential IF filters. AC-couple the IF pin(s) with a
capacitor. The typical IF input frequency range is
40MHz to 500MHz. For further information, see the IF
Port Impedance vs. IF Frequency graph in the Typical
Operating Characteristics.
RF Output
The RF output frequency range extends from 400MHz
to 2.5GHz. RFOUT is a high-impedance, open-collector
output that requires an external inductor to V CC for
proper biasing. For optimum performance, implement
an impedance-matching network. The configuration
and values for the matching network depend on the frequency, performance, and desired output impedance.
For assistance in choosing components for optimal performance, see Table 1 as well as the RF Output
Impedance vs. RF Frequency graph in the Typical
Operating Characteristics.
______________________Layout Issues
A well-designed PC board is an essential part of an RF
circuit. For best performance, pay attention to powersupply issues as well as to the layout of the RFOUT
matching network.
Power-Supply Layout
To minimize coupling between different sections of the
IC, the ideal power-supply layout is a star configuration
with a large decoupling capacitor at a central V CC
node. The V CC traces branch out from this central
node, each going to a separate VCC node in the PC
board. At the end of each trace is a bypass capacitor
that has low ESR at the RF frequency of operation. This
arrangement provides local decoupling at each VCC
pin. At high frequencies, any signal leaking out of one
supply pin sees a relatively high impedance (formed by
the VCC trace inductance) to the central VCC node, and
an even higher impedance to any other supply pin, as
well as a low impedance to ground through the bypass
capacitor.
Impedance-Matching Network Layout
The RFOUT matching network is very sensitive to layout-related parasitics. To minimize parasitic inductance, keep all traces short and place components as
close as possible to the chip. To minimize parasitic
capacitance, use cutouts in the ground plane (and any
other plane) below the matching network components.
______________________________________________________________________________________
13
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
_______________Detailed Description
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
Table 1. RF Output Impedance
RF OUTPUT IMPEDANCE (Ω)
PART
MAX2660
AT 400MHz
480–j732
AT 900MHz
126–j459
AT 1900MHz
65–j190
MAX2661
MAX2663
AT 2450MHz
46–j124
357–j649
92–j375
54–j152
38–j99
485–j718
130–j453
65–j188
45–j123
MAX2671
333–j613
82–j360
46–j150
31–j95
MAX2673
220–j530
70–j290
35–j110
32–j70
Table 2. Typical Operating Circuit (External Component Values)
COMPONENT VALUE AT A GIVEN FREQUENCY (MHz)
MAX2660
COMPONENT
MAX2661/MAX2671
AT
AT
1900 2450
MAX2663
MAX2673
AT
400
AT
900
AT
1900
AT
2450
AT
400
AT
900
AT
1900
AT
2450
AT
400
AT
900
3.3
Short
33
8.2
3.3
Short
33
8.2
3.3
Short
27
5.6
3.9
2.7
2.2
39
18
2.7
1.8
39
18
1.8
1.8
39
18
4.7
6.8
47
47
47
470
47
47
47
470
47
47
47
3.3
220
10
15
3.3
220
220
15
3.3
220
100
220
3.3
220
100
220
6.8
1.5
1.5
1
C5 (pF)
6.8
1
1.5
Open
6.8
1
1.5
Open
6.8
1.8
1.8
Open
470
47
47
47
C6 (pF)
470
47
47
15
470
47
100
47
470
47
100
47
470
100
100
100
AT
400
AT
900
L1 (nH)
Short
33
8.2
L2 (nH)
39
18
C3 (pF)
470
C4 (pF)
AT
AT
1900 2450
Functional Diagram
LO
MAX2660
MAX2661
MAX2663
LO
MAX2671
MAX2673
MAX2660
MAX2661
MAX2663
MAX2671
MAX2673
VCC
BIAS
SHDN
GND
IFIN+
RFOUT
IFINMAX2673
ONLY
14
______________________________________________________________________________________
400MHz to 2.5GHz Upconverter Mixers
C1
220pF
1
LO INPUT
2
C2
220pF
3
IF INPUT
SHDN
LO
GND
IFIN
MAX2660
MAX2661
MAX2663
MAX2671
VCC
6
C8
100pF
SHUTDOWN
CONTROL
R1
100Ω
5
C3*
RFOUT
4
C4*
L1*
L2*
*THE VALUES OF L1, L2, C3, C4, C5, AND C6
DEPEND ON THE RF FREQUENCY AND PART NUMBER.
SEE TABLE 2.
VCC
+3.0V
C6*
C1
220pF
1
LO INPUT
2
SHUTDOWN
CONTROL
3
R2
100Ω
4
C8
100pF
IFIN+
LO
GND
SHDN
VCC
MAX2673
IFINGND
RFOUT
C9
10µF
C2
220pF
8
7
RF OUTPUT
C5*
C10
22pF
IF INPUT
C7
220pF
6
5
C5**
C3**
RF OUTPUT
L1**
**THE VALUES OF L1, L2, C3, C4, C5, AND C6
DEPEND ON THE RF FREQUENCY.
SEE TABLE 2.
L2**
C4**
VCC
+3.0V
C9
10µF
C6**
______________________________________________________________________________________
15
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
Typical Operating Circuits
6LSOT.EPS
________________________________________________________Package Information
8LUMAXD.EPS
MAX2660/MAX2661/MAX2663/MAX2671/MAX2673
400MHz to 2.5GHz Upconverter Mixers
16
______________________________________________________________________________________