General Description
The MAX2654/MAX2655/MAX2656 high third-order
intercept point (IP3), low-noise amplifiers (LNAs) are
designed for applications in GPS, PCS, WLL, and satel-
lite phone systems. The MAX2654/MAX2655/MAX2656
incorporate on-chip internal output matching to 50Ω,
eliminating the need for external matching components.
A shutdown feature in the MAX2654/MAX2655 reduces
the operating current to 0.1µA, eliminating the need for
an external supply switch.
The MAX2654 operates in the GPS frequency of
1575MHz with 15.1dB of gain, 1.5dB noise figure, and
only consumes 5.8mA. The MAX2655 is designed with
high-input IP3 to improve operation in cellular applica-
tions where the cellular power amplifier leaks into the
GPS receiver. The MAX2656 is designed for PCS
phone applications with 13.5dB of gain in high-gain
mode and 0.8dB of gain in low-gain mode (selected by
a logic control) and 1.9dB noise figure.
The IP3 of MAX2655/MAX2656 is adjustable by a single
external bias resistor (RBIAS), allowing supply current to
be optimized for a specific application.
The MAX2654/MAX2655/MAX2656 operate from a
+2.7V to +5.5V single supply and are available in the
miniature 6-pin SC70 package.
________________________Applications
GPS Receivers
GPS Receivers in Cell Phones
DCS/PCS Cell Phones
Satellite Phones
Wireless Local Loop
Features
♦Low Noise Figure
MAX2654: 1.5dB at 1575MHz
MAX2655: 1.45dB at 1575MHz
MAX2656: 1.9dB at 1960MHz
♦High Gain
MAX2654: 15.1dB at 1575MHz
MAX2655: 14.1dB at 1575MHz
MAX2656: 13.5dB at 1960MHz
♦12.7dB Gain Step (MAX2656 only)
♦Integrated 50ΩOutput Matching
♦Variable IP3 Set by One Bias Resistor
(MAX2655/MAX2656 only)
♦0.1µA Shutdown Mode (MAX2654/MAX2655 only)
♦+2.7V to +5.5V Single-Supply Operation
♦Ultra-Small 6-Pin SC70 Package
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
________________________________________________________________ Maxim Integrated Products 1
16
5
MAX2654
MAX2655
MAX2654
SC70-6
TOP VIEW
2
34
VCC
RFOUT
( ) ARE FOR MAX2654 ONLY
GND
GND
RFIN
BIAS (GND)
Pin Configuration
MAX2655
MAX2656
C2
3
4
6
10kΩ
Cb
(1)
1
25
C1
RBIAS
VCTRL/GND
VCC = +3.0V
RFOUT
RFIN L1
BIAS
( ) IS FOR MAX2654 ONLY
Typical Operating Circuit
19-1872; Rev 0; 1/01
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Ordering Information
PART TEMP.
RANGE
PIN-
PACKAGE
SOT
TOP-
MARK
MAX2654EXT-T -40°C to +85°C 6 SC70-6 AAI
MAX2655EXT-T -40°C to +85°C 6 SC70-6 AAJ
MAX2656EXT-T -40°C to +95°C 6 SC70-6 AAK
PART FREQUENCY L1 (nH) C1 (pF) C2 (pF)
MAX2654 1575 5.6 6 1.6
MAX2655 1575 5.6 1800 1.5
MAX2656 1960 4.7 1800 1.2
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
2 _______________________________________________________________________________________
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.
VCC to GND .............................................................-0.3V to +6V
RF Input Power .................................................................+5dBm
Continuous Power Dissipation (TA= +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature.........................................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, RBIAS = 511Ω±1%, TA= -40°C to +85°C. No RF signal applied. RFIN is AC coupled and terminated to 50Ω.
RFOUT is unconnected. Typical values are at VCC = +3.0V, TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNIT
Supply Voltage 2.7 5.5 V
TA = +25°C 5.8 8.2
VRFOUT = VCC TA = -40°C to +85°C 9.2 mA
TA = +25°C 0.1 1.0
Operating Supply Current
(MAX2654 only)
VRFOUT = GND TA= -40°C to +85°C 2.1 µA
RBIAS = 511Ω±1% 8.3 10.0
RBIAS = 698Ω±1% 5.9
RBIAS = 357Ω±1% 10.1
VRFOUT = VCC
TA= +25°C
RBIAS = 511Ω±1%,
TA = -40°C to +85°C 11.1
mA
TA = +25°C 0.1 1.0
Operating Supply Current
(MAX2655 only)
VRFOUT = GND TA= -40°C to +85°C 2.2 µA
RBIAS = 511Ω±1% 11.5 15.2
RBIAS = 715Ω±1% 8.5
VRFOUT = GND
TA= +25°C RBIAS = 511Ω±1%,
TA = +85°C 13.6
mA
TA = +25°C 12.3
Operating Supply Current
(MAX2656 only)
VRFOUT = VCC TA= +85°C 14.6 mA
Input Logic High at VRFOUT (Note 2) 2.0 V
Input Logic Low at VRFOUT (Note 3) 0.6 V
MAX2654/MAX2655 15.6
Input Logic High Current
at VRFOUT (Note 4) MAX2656 71 µA
MAX2654/MAX2655 1.0
Input Logic Low Current
at VRFOUT (Note 5) MAX2656 -24 µA
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS (MAX2654)
(MAX2654 Evaluation Kit, VCC = +3.0V, PIN = -30dBm, fIN = 1575MHz, VRFOUT = VCC through a 10kΩresistor, TA= +25°C. Typical
values are at VCC = +3.0V, TA= +25°C, unless otherwise noted.) (Note 6)
PARAMETER CONDITIONS MIN TYP MAX UNIT
Operating Frequency Range (Note 7) 1400 1700 MHz
Gain (Note 8) 12.7 15.1 dB
Gain Variation Over Temperature TA = -40°C to +85°C 0.15 1.0 dB
Input Third-Order Intercept Point
(Note 9) -7.2 dBm
Input 1dB Compression Point -18 dBm
Noise Figure (Note 10) 1.5 1.8 dB
Input Return Loss 9.7 dB
Output Return Loss 8.4 dB
Reverse Isolation 30 dB
AC ELECTRICAL CHARACTERISTICS (MAX2655)
(MAX2655 Evaluation Kit, VCC = +3.0V, PIN = -30dBm, fIN = 1575MHz, VRFOUT = VCC through a 10kΩresistor, RBIAS = 511Ω±1%,
TA= +25°C. Typical values are at VCC = +3.0V, TA= +25°C, unless otherwise noted.) (Note 6)
PARAMETER CONDITIONS MIN TYP MAX UNIT
Operating Frequency Range (Note 7) 1400 1700 MHz
Gain (Note 8) 12.0 14.1 dB
Gain Variation Over Temperature TA = -40°C to +85°C 0.6 1.1 dB
RBIAS = 511Ω±1% +2.8
RBIAS = 698Ω±1% +2.2 dBm
Input Third-Order Intercept Point
(Note 9) RBIAS = 357Ω±1% +3.8
Input 1dB Compression Point -12.2 dBm
Noise Figure (Note 10) 1.45 1.9 dB
Input Return Loss 16.1 dB
Output Return Loss 15.5 dB
Reverse Isolation 32 dB
_______________________________________________________________________________________ 3
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
AC ELECTRICAL CHARACTERISTICS (MAX2656)
(MAX2656 Evaluation Kit, VCC = +3.0V, PIN = -30dBm, fIN = 1960MHz, VRFOUT = GND through a 12kΩresistor, RBIAS = 511Ω±1%,
TA= +25°C. Typical values are at VCC = +3.0V, TA= +25°C, unless otherwise noted.) (Note 6)
PARAMETER CONDITIONS MIN TYP MAX UNIT
Operating Frequency Range (Note 7) 1800 2000 MHz
Gain, High-Gain Mode (Note 11) 12 13.5 dB
Gain, Low-Gain Mode (Note 12) 0.8 dB
Gain Variation Over Temperature TA = -40°C to +85°C 0.3 1.2 dB
Gain Step 12.7 dB
RBIAS = 511Ω± 1% +1.5
RBIAS = 715Ω± 1% -3
Input Third-Order Intercept Point
(Note 13)
Low-gain mode (Note 12) +7.2
dBm
High-gain mode (Note 11) -7.0
Input 1dB Compression Point Low-gain mode (Note 12) -1.2 dBm
High-gain mode (Note 11) 1.9 2.4
Noise Figure (Note 10) Low-gain mode (Note 12) 10.8 dB
High-gain mode (Note 11) 14.4
Input Return Loss Low-gain mode (Note 12) 19.3 dB
High-gain mode (Note 11) 10.7
Output Return Loss Low-gain mode (Note 12) 7.3 dB
High-gain mode (Note 11) 28
Reverse Isolation Low-gain mode (Note 12) 25 dB
Gain Step Response Time 3.2 µs
Note 1: Devices are production tested at TA= +25°C. Minimum and maximum values are guaranteed by design and characteriza-
tion over temperature and supply voltages to ±6 sigma.
Note 2: Minimum DC voltage through a 10kΩresistor that sets the MAX2654/MAX2655 to operate in normal mode and MAX2656 in
low-gain mode.
Note 3: Maximum DC voltage through a 10kΩresistor that sets the MAX2654/MAX2655 to operate in shutdown mode and
MAX2656 in high-gain mode.
Note 4: DC current required when VRFOUT is connected to VCC through a 10kΩresistor.
Note 5: DC current required when VRFOUT is connected to GND through a 10kΩresistor.
Note 6: Guaranteed by design and characterization to ±3 sigma.
Note 7: The part has been characterized at the specified frequency range. Operation outside of this range is possible, but not
guaranteed.
Note 8: Production tested at TA= +25°C.
Note 9: Measured with two input tones, f1= 1570MHz, f2= 1580MHz, both at -30dBm per tone.
Note 10: Excludes PC board losses of 0.2dB for MAX2654/MAX2655 and 0.25dB for MAX2656.
Note 11: High-gain mode is set up by connecting RFOUT to GND through a 12kΩresistor.
Note 12: Low-gain mode is set up by connecting RFOUT to VCC through a 12kΩresistor.
Note 13: Measured with two input tones, f1= 1955MHz, f2= 1965MHz, both at -30dBm per tone.
4 ______________________________________________________________________________________
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
Typical Operating Characteristics
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
0
1
2
3
4
5
6
7
8
23456
MAX2654
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = -40°C
TA = +25°C
TA = +85°C
40
45
50
55
60
-40 0 20-20 40 60 80
MAX2654
INPUT LOGIC CURRENT vs. TEMPERATURE
MAX2654 toc05
TEMPERATURE (°C)
INPUT LOGIC CURRENT (µA)
INPUT LOGIC LOW AT VRFOUT
0
6
4
2
8
10
14
12
16
1000 1200 1400 1600 1800 2000 2200
MAX2654
GAIN vs. FREQUENCY
MAX2654 toc07
FREQUENCY (MHz)
GAIN (dB)
1.6
2.0
1.8
2.2
2.8
3.0
2.6
2.4
3.2
1000 1200 1400 1600 1800 2000
MAX2654
NOISE FIGURE vs. FREQUENCY
MAX2654 toc09
FREQUENCY (MHz)
NOISE FIGURE (dB)
0
4
6
7
8
-40 0 20-20 40 60 80
MAX2654
INPUT LOGIC CURRENT vs. TEMPERATURE
MAX2654 toc04
TEMPERATURE (°C)
INPUT LOGIC CURRENT (µA)
INPUT LOGIC HIGH AT VRFOUT
10
11
13
12
14
15
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
MAX2654
GAIN vs. SUPPLY VOLTAGE
MAX2654 toc08
SUPPLY VOLTAGE (V)
GAIN (dB)
f0 = 1575MHz
TA = +85°CTA = +25°CTA = -40°C
4
5
6
7
8
9
10
11
12
13
14
15
-40 -20 0 20 40 8060
MAX2654
SHUTDOWN CURRENT vs. TEMPERATURE
MAX2654 toc02
TEMPERATURE (°C)
SHUTDOWN CURRENT (µA)
1
2
3
0
VCC = +6.0V
VCC = +3.0V
-40 0-20 20 40 60 80
MAX2654
INPUT LOGIC VOLTAGE vs. TEMPERATURE
MAX2654 toc03
TEMPERATURE (°C)
INPUT LOGIC VOLTAGE (V)
0.5
1.0
1.5
2.0
INPUT LOGIC HIGH AT V
RFOUT
INPUT LOGIC LOW AT V
RFOUT
_______________________________________________________________________________________ 5
-10
-9
-8
-7
-6
MAX2654
INPUT IP3 vs. TEMPERATURE
MAX2654 toc06
TEMPERATURE (°C)
INPUT IP3 (dBm)
-40 20 40-20 0 60 80
f1 = 1570 MHz
f2 = 1580 MHz
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
-10
-8
-6
-4
-2
0
1000 1200 1400 1600 1800 2000
MAX2654
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2654 toc11
FREQUENCY (MHz)
INPUT/OUTPUT RETURN LOSS (dB)
2200
INPUT RETURN LOSS
OUTPUT RETURN LOSS
-60
-45
-50
-55
-40
-35
-25
-30
-20
1000 1200 1400 1600 1800 2000 2200
MAX2654
REVERSE ISOLATION vs. FREQUENCY
MAX2654 toc12
FREQUENCY (MHz)
REVERSE ISOLATION (dB)
-14
-10
-12
-8
-6
-4
-2
0
2
4
6
8
-30 -26 -22 -18 -14 -10
MAX2654
OUTPUT POWER vs. INPUT POWER
MAX2654 toc13
INPUT POWER (dBm)
OUTPUT POWER (dBm)
-16
-6 -2 2
6 ______________________________________________________________________________________
0
1
2
3
4
5
6
7
8
23456
MAX2655
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2655 toc16
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
RBIAS = 698Ω±1%
TA = +85°C
TA = +25°C
TA = -40°C
0
3
2
1
4
5
6
7
8
9
10
23456
MAX2655
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2655 toc17
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
RBIAS = 511Ω±1%
TA = +85°C
TA = +25°C
TA = -40°C
-22
-21
-19
-20
-18
-17
-40 0-20 20 40 60 80
MAX2654
P1dB vs. TEMPERATURE
MAX2654 toc14
TEMPERATURE (°C)
P1dB (dBm)
f
IN
= 1575MHz
0
4
2
8
6
12
10
14
MAX2655
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2655 toc18
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
23456
RBIAS = 357Ω±1%
TA = +85°C
TA = +25°C
TA = -40°C
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
1.0
1.4
1.2
1.8
1.6
2.2
2.0
2.4
-40 0 20-20 40 60 80
MAX2654
NOISE FIGURE vs. TEMPERATURE
MAX2654 toc10
TEMPERATURE (°C)
NOISE FIGURE (dB)
f
IN
= 1575MHz
-100
-90
-80
-70
-50
-60
-40
-20
-30
-10
0
0 1.0 2.0 3.0 4.0
MAX2654
SHUTDOWN TIME
MAX2655 toc15
TIME (µs)
OUTPUT POWER (dBm)
2.8µs
US
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
MAX2655
INPUT IP3 vs. RBIAS
MAX2655 toc23
-10
-4
-6
-8
0
-2
6
8
4
2
10
INPUT IP3 (dBm)
200 600 800400 1000 1200 1400 1600
TEMPERATURE (°C)
TA = +85°C
PIN = -30dBm
f1 = 1570 MHz
f2 = 1580 MHz
TA = +25°C
TA = -40°C
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
-40 0 20-20 40 60 80
MAX2655
INPUT LOGIC VOLTAGE vs. TEMPERATURE
MAX2655 toc21
TEMPERATURE (°C)
INPUT LOGIC VOLTAGE (V)
0.5
1.0
1.5
2.0
INPUT LOGIC HIGH AT VRFOUT
INPUT LOGIC LOW AT VRFOUT
10
11
13
12
14
15
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
MAX2655 toc26
SUPPLY VOLTAGE (V)
GAIN (dB)
TA = -40°C
TA = +85°C
TA = +25°C
fIN = 1575MHz
RBIAS = 511Ω ±1%
MAX2655
GAIN vs. SUPPLY VOLTAGE
8
11
10
9
13
12
17
16
15
14
18
200 400 600 800 1000 1200 1400 1600
MAX2655
GAIN vs. RBIAS
MAX2655 toc25
RBIAS (Ω)
GAIN (dB)
fIN = 1575MHz
TA = -40°C
TA = +85°C
TA = +25°C
MAX2655
INPUT LOGIC CURRENT vs. TEMPERATURE
MAX2655 toc22
4
5
6
9
8
7
10
INPUT LOGIC CURRENT (µA)
-40 0 20-20 40 60 80
TEMPERATURE (°C)
INPUT LOGIC HIGH AT VRFOUT
INPUT LOGIC LOW AT VRFOUT
0
6
4
2
8
10
12
14
16
1000 1400 16001200 1800 2000 2200
MAX2655
GAIN vs. FREQUENCY
MAX2655 toc24
FREQUENCY (MHz)
GAIN (dB)
RBIAS = 511Ω±1%
RBIAS = 357Ω±1%
RBIAS = 698Ω±1%
_______________________________________________________________________________________ 7
MAX2655
SUPPLY CURRENT vs. RBIAS
MAX2655 toc19
0
2
6
4
12
14
10
8
16
SUPPLY CURRENT (mA)
200 600 800400 1000 1200 1400 1600
RBIAS (Ω)
TA = -40°C
TA = +25°C
TA = +85°C
14
20
18
16
22
24
26
28
30
MAX2655
SHUTDOWN CURRENT vs. TEMPERATURE
MAX2655 toc20
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
0
2
4
6
8
10
12
-40 0 20-20 40 60 80
VCC = +6.0V
VCC = +3.0V
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
8 _______________________________________________________________________________________
-100
-90
-80
-70
-50
-60
-40
-20
-30
-10
0
02.01.0 4.03.0 6.0 7.05.0 8.0
MAX2655
SHUTDOWN TIME
MAX2655 toc31
TIME (us)
OUTPUT POWER (dBm)
5.8µs
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
-4
-6
-8
-10
-12
-14
-16
0
-2
4
2
6
10
8
12
-30 -22 -18-26 -14 -10 -6 -2 2
MAX2655
OUTPUT POWER vs. INPUT POWER
MAX2655 toc32
INPUT POWER (dBm)
OUTPUT POWER (dBm)
fIN = 1575MHz
RBIAS = 698Ω±1%
RBIAS = 357Ω±1%
RBIAS = 511Ω±1%
-18
-15
-16
-17
-13
-14
-9
-10
-11
-12
-8
200 400 600 800 1000 1200 1400 1600
MAX2655
P1dB vs. RBIAS
MAX2655 toc33
RBIAS (Ω)
P1dB (dBm)
fIN = 1575MHz
TA = -40°C
TA = +85°C
TA = +25°C
0
4
5
3
2
1
6
7
8
9
10
11
12
13
14
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc35
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
RBIAS = 511Ω±1%
HIGH-GAIN MODE
TA = +85°C
TA = +25°C
TA = -40°C
0
6
4
2
8
10
12
14
16
18
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc36
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°C
TA = +25°C
TA = -40°C
RBIAS = 392Ω±1%
HIGH-GAIN MODE
0
3
2
1
4
5
6
7
8
9
10
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc34
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
RBIAS = 715Ω±1%
HIGH-GAIN MODE
TA= +85°C
TA= +25°C
TA= -40°C
-24
-20
-16
-12
-8
-4
0
1000 1200 1400 1600 1800 2000
MAX2655
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2655 toc29
FREQUENCY (MHz)
INPUT/OUTPUT RETURN LOSS (dB)
2200
INPUT RETURN LOSS
OUTPUT RETURN LOSS
MAX2655
REVERSE ISOLATION vs. FREQUENCY
MAX2655 toc30
-60
-55
-45
-50
-30
-25
-35
-40
-20
REVERSE ISOLATION (dB)
1000 1400 16001200 1800 2000 2200
FREQUENCY (MHz)
1.0
1.2
1.6
1.4
1.8
2.0
-40 0-20 20406080
MAX2655
NOISE FIGURE vs. TEMPERATURE
MAX2655 toc28
TEMPERATURE (°C)
NOISE FIGURE (dB)
fIN = 1575MHz
RBIAS = 511Ω±1%
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
_______________________________________________________________________________________ 9
0
6
8
2
4
14
16
10
12
22
24
18
20
26
200 600 800400 1000 1200 1400 1600
MAX2656
SUPPLY CURRENT vs. RBIAS
MAX2654 toc40
RBIAS (Ω)
SUPPLY CURRENT (mA)
HIGH-GAIN MODE
TA = +85°C
TA = -40°C
TA = +25°C
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
0
6
8
2
4
14
16
10
12
22
24
18
20
26
200 600 800400 1000 1200 1400 1600
MAX2656
SUPPLY CURRENT vs. RBIAS
MAX2654 toc41
RBIAS (Ω)
SUPPLY CURRENT (mA)
LOW-GAIN MODE
TA = +85°C
TA = -40°C
TA = +25°C
2.0
1.5
1.0
0.5
-40 20
-20 04060
MAX2656
INPUT LOGIC VOLTAGE vs. TEMPERATURE
MAX2654 toc42
TEMPERATURE (°C)
INPUT LOGIC VOLTAGE (V)
80
I
NPUT LOGIC HIGH AT VRFOUT
INPUT LOGIC LOW AT VRFOUT
-15
-11
-9
-13
-3
-7
-5
3
-1
1
5
200 600 800400 1000 1200 1400 1600
MAX2656
INPUT IP3 vs. RBIAS
MAX2654 toc44
RBIAS (Ω)
INPUT IP3 (dBm)
TA = -40°C
TA = +85°C
f1 = 1955MHz
f2 = 1965MHz
PIN = -20dBm
HIGH-GAIN MODE
TA = +25°C
-6
4
10
6
8
12
0
-4
-2
2
200 600 800400 1000 1200 1400 1600
MAX2656
INPUT IP3 vs. RBIAS
MAX2654 toc45
RBIAS (Ω)
INPUT IP3 (dBm)
f1 = 1955MHz
f2 = 1965MHz
PIN = -20dBm
LOW-GAIN MODE
TA = +25°C
TA = +85°C
TA = -40°C
10
0
-10
-20
-30
-40 20
-20 04060
MAX2656
INPUT LOGIC CURRENT vs. TEMPERATURE
MAX2654 toc43
TEMPERATURE (°C)
INPUT LOGIC CURRENT (µA)
80
INPUT LOGIC LOW AT VRFOUT
I
NPUT LOGIC HIGH AT VRFOUT
0
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc38
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°C
TA = +25°C
TA = -40°C
RBIAS = 511Ω±1%
LOW-GAIN MODE
0
16
14
18
20
8
6
10
12
2
4
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc39
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
RBIAS = 392Ω ±1%
LOW-GAIN MODE
TA = +25°C
TA = +85°C
TA = -40°C
0
4
3
2
1
5
6
7
8
9
10
11
12
23456
MAX2656
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX2654 toc37
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°C
TA = +25°C
TA = -40°C
RBIAS = 715Ω±1%
LOW-GAIN MODE
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
10 ______________________________________________________________________________________
0
16
15
14
13
12
11
10
9
8
7
6
5
4
2
1
3
1000 16001200 1400 20001800 2200
MAX2656
GAIN vs. FREQUENCY
MAX2654 toc46
FREQUENCY (MHz)
GAIN (dB)
HIGH-GAIN MODE
RBIAS = 392Ω±1%
RBIAS = 698Ω±1%
RBIAS = 511Ω±1%
-4
4
3
2
1
0
-1
-2
-3
1000 1600 18001200 1400 2000 2200
MAX2656
GAIN vs. FREQUENCY
MAX2654 toc47
FREQUENCY (MHz)
GAIN (dB)
LOW-GAIN MODE
RBIAS = 392Ω±1%
RBIAS = 715Ω±1%
RBIAS = 511Ω±1%
6
14
17
15
16
18
13
8
11
9
10
12
7
200 600 800400 1000 1200 1400 1600
MAX2656
GAIN vs. RBIAS
MAX2654 toc48
RBIAS (Ω)
GAIN (dB)
fIN = 1960MHz
HIGH-GAIN MODE
TA = +25°C
TA = +85°C
TA = -40°C
-2
2
3
4
-1
0
1
200 600 800400 1000 1200 1400 1600
MAX2656
GAIN vs. RBIAS
MAX2654 toc49
RBIAS (Ω)
GAIN (dB)
fIN = 1960MHz
LOW-GAIN MODE
TA = +25°C
TA = +85°C
TA = -40°C
0
1
2
3
2.5 4.0 4.53.0 3.5 5.0 5.5 6.0
MAX2656
GAIN vs. SUPPLY VOLTAGE
MAX2654 toc50
SUPPLY VOLTAGE (V)
GAIN (dB)
TA = +85°C
TA = +25°C
TA = -40°C
RBIAS = 511Ω ±1%
fIN = 1960MHz
LOW-GAIN MODE
14.0
14.5
15.0
15.5
16.0
2.5 4.0 4.53.0 3.5 5.0 5.5 6.0
MAX2656
GAIN vs. SUPPLY VOLTAGE
MAX2654 toc51
SUPPLY VOLTAGE (V)
GAIN (dB)
RBIAS = 511Ω ±1%
f1 = 1960MHz
HIGH-GAIN MODE
TA = +25°C
TA = +85°C
TA = -40°C
1.4
1.6
2.0
1.8
2.2
2.4
1500 1700 18001600 1900 2000 2100 2200 2300
MAX2656
NOISE FIGURE vs. FREQUENCY
MAX2654 toc52
FREQUENCY
(
MHz
)
NOISE FIGURE (dB)
RBIAS = 715Ω±1%
RBIAS = 511Ω±1%
RBIAS = 392Ω±1%
2.2
2.0
2.4
1.8
1.6
1.4
1.2
1.0
-40 20
-20 0406080
MAX2656
NOISE FIGURE vs. TEMPERATURE
MAX2654 toc53
TEMPERATURE
(
°C
)
NOISE FIGURE (dB)
f1 = 1960MHz
RBIAS = 511Ω±
1%
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
1000 1600 18001200 1400 2000 2200
MAX2656
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2654 toc54
FREQUENCY
(
MHz
)
INPUT/OUTPUT RETURN LOSS (dB)
LOW-GAIN MODE
INPUT
RETURN LOSS
OUTPUT
RETURN LOSS
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 11
0
-2
-4
-6
-8
-10
-12
-14
1000 1600 18001200 1400 2000 2200
MAX2656
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
MAX2654 toc55
FREQUENCY (MHz)
INPUT/OUTPUT RETURN LOSS (dB)
HIGH-GAIN MODE
INPUT
RETURN LOSS
OUTPUT
RETURN LOSS
-45
-50
-55
-60
-25
-20
-30
-35
-40
1000 1600 18001200 1400 2000 2200
MAX2656
REVERSE ISOLATION vs. FREQUENCY
MAX2654 toc56
FREQUENCY (MHz)
REVERSE ISOLATION (dB)
HIGH-GAIN MODE
LOW-GAIN MODE
-40
-30
-35
-20
-25
-15
-10
02.01.0 3.0 4.0
MAX2656
GAIN STEP TIME FROM LOW TO HIGH
MAX2654 toc57
TIME (µs)
OUTPUT POWER (dBm)
2.0µs
-40
-30
-35
-20
-25
-15
-10
02.01.0 3.0 4.0
MAX2656
GAIN STEP TIME FROM HIGH TO LOW
MAX2654 toc58
TIME (µs)
OUTPUT POWER (dBm)
2.0µs
-20
10
8
6
4
2
0
-2
-4
-6
-8
-10
-12
-14
-18
-16
-30 -15 -10-25 -20 -5 0
MAX2656
OUTPUT POWER vs. INPUT POWER
MAX2654 toc59
INPUT POWER (dBm)
OUTPUT POWER (dBm)
fIN = 1960MHz
HIGH-GAIN MODE
RBIAS = 715Ω ±1%
RBIAS = 511Ω ±1%
RBIAS = 392Ω ±1%
-30
2
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-26
-28
-24
-30 -15 -10-25 -20 -5 0
MAX2656
OUTPUT POWER vs. INPUT POWER
MAX2654 toc60
INPUT POWER (dBm)
OUTPUT POWER (dBm)
fIN = 1960MHz
LOW-GAIN MODE
RBIAS = 715Ω ±1%
RBIAS = 511Ω ±1%
RBIAS = 392Ω ±1%
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3.0V, TA= +25°C, high-gain, low-gain mode is applicable only to
the MAX2656, unless otherwise noted.)
-12
2
3
4
0
1
-1
-4
-3
-2
-6
-5
-7
-10
-9
-8
-11
200 600 800400 1000 1200 1400 1600
MAX2656
P1dB vs. RBIAS
MAX2654 toc62
RBIAS (Ω)
P1dB (dBm)
TA = +25°C
TA = -40°C
TA = +85°C
fIN = 1960MHz
HIGH-GAIN MODE
-10
2
3
4
0
1
-4
-3
-2
-1
-6
-5
-8
-9
-7
200 600 800400 1000 1200 1400 1600
MAX2656
P1dB vs. RBIAS
MAX2654 toc61
RBIAS (Ω)
P1dB (dBm)
TA = +25°C
TA = +40°C
fIN = 1960MHz
LOW-GAIN MODE
TA = +85°C
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
12 ______________________________________________________________________________________
Detailed Description
The MAX2654/MAX2655/MAX2656 are low-noise ampli-
fiers designed for applications in GPS receivers, satel-
lite and PCS phones. The MAX2655/MAX2656 feature
variable IP3s, adjusted by a single external bias resis-
tor. Another feature of the MAX2654/MAX2655 is a
power shutdown control mode, eliminating the need for
an external supply switch. The MAX2656 features a
high- and low-gain control mode selected by an exter-
nal logic control.
Input and Output Ports
The MAX2654/MAX2655/MAX2656 incorporate on-chip
matching networks to 50Ωat the output ports, eliminat-
ing the need for external matching components. (For
MAX2655, a shunt inductor is recommended for best
output return loss. Refer to the MAX2655 EV kit
schematic.) The MAX2654/MAX2655/MAX2656 require
simple matching networks at the input ports. The values
of these matching components are recommended in
the Typical Operating Circuit.
Variable IP3
The IP3 of MAX2655 and MAX2656 is adjusted through
an external resistor (RBIAS). Tables 1 and 2 summarize
the values of RBIAS for different IP3s for MAX2655 and
MAX2656.
Gain-Step Control (MAX2656)
The DC bias voltage at RFOUT of the MAX2656 serves
as a gain-step control input. When the applied DC volt-
age at RFOUT through a 10kΩresistor is less than
+0.6V, the device is in high-gain mode. When the
applied DC voltage is greater than +2.0V, the device
gain is attenuated by 13dB. A standard logic output
can be applied as shown in the Typical Operating
Circuit.
Shutdown-Enable (MAX2654/MAX2655)
The DC bias voltage at RFOUT of the MAX2654/
MAX2655 serves as a shutdown enable input. When the
applied DC voltage at RFOUT through a 10kΩresistor
is less than +0.6V, the device is in shutdown mode.
When the DC voltage is greater than +2.0V, the device
is enabled.
Pin Description
Table 1. RBIAS vs. IP3 for MAX2655
RBIAS (Ω) IP3 (dBm) ICC (mA)
698 +2.2 5.8
357 +3.8 10.1
Table 2. RBIAS vs. IP3 for MAX2656
RBIAS (Ω) IP3 (dBm) ICC (mA)
715 -3.0 8.5
511 +1.5 11.5
PIN
MAX2654 MAX2655/
MAX2656
NAME DESCRIPTION
1 ––– GND Ground. Connect to the PC board ground plane through a 0.017in width by 0.035in length
line.
2, 5 2, 5 GND Ground. Connect to the PC board ground plane with as low an inductance path as
possible.
––– 1 BIAS Bias Control. Connect a resistor RBIAS from BIAS to GND. RBIAS sets IP3 and
supply current.
3 3 RFIN Amplifier Input. Requires a DC blocking capacitor and external matching components.
44V
CC Supply Voltage. Bypass to ground with an appropriate capacitor as close to the IC as
possible. Refer to MAX2654/MAX2655/MAX2656 EV kits for capacitor values.
6 6 RFOUT
RF Output. Incorporates an internal DC blocking capacitor. RFOUT is internally
matched to 50Ω. DC bias on this pin selects gain-mode (MAX2656) or shutdown mode
(MAX2654/MAX2655) (see Applications Information).
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 13
Applications Information
Input Matching
For optimum performance, input matching is required.
The MAX2654/MAX2655/MAX2656 require a simple LC
matching network. The Typical Operating Circuit shows
the recommended input matching networks. These val-
ues are optimized for best simultaneous gain, noise fig-
ure, and return loss performance. To aid in the design
of the matching network for other frequencies, Tables 3
to 12 list typical device S parameters for various biases,
and Tables 13 to 19 list typical device noise parame-
ters.
Layout Issues
A properly designed PC board is essential to any RF-
microwave circuit. Use controlled impedance lines on
all high-frequency inputs and outputs. Bypass VCC
with decoupling capacitors located close to the device.
For long VCC lines, it may be necessary to add addi-
tional decoupling capacitors. Locate these additional
capacitors further away from the device package.
Proper grounding of the GND pins is essential. If the PC
board uses a topside RF ground, connect it directly to
all GND pins. For a board where the ground plane is
not on the component layer, the best technique is to
connect the GND pins to the board with a multiple vias
close to the package.
For MAX2654, connect Pin1 to the PC board ground
plane through a 0.017in width by 0.035in length line.
Chip Information
TRANSISTOR COUNT: 135
(Same for MAX2654, MAX2655, MAX2656)
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.89385 -74.912 1.2528 -82.605 0.002753 170.8 0.90701 -47.453
1100 0.80001 -97.884 2.0362 -104.54 0.002910 -130.71 0.878 -54.904
1200 0.73938 -104.55 2.5475 -117.79 0.005752 -125.12 0.83831 -63.446
1300 0.72262 -109.59 3.1159 -132.32 0.008972 -135.01 0.77334 -72.44
1400 0.7281 -114.65 3.4788 -146.86 0.01348 -124.91 0.67495 -82.018
1500 0.73978 -120.58 3.9157 -164.15 0.016427 -137.27 0.55261 -89.081
1575 0.74196 -119.99 3.8846 -172.96 0.020271 -137.19 0.46295 -86.402
1600 0.74377 -125.96 3.8651 179.29 0.021794 -143.89 0.43268 -89.301
1620 0.74343 -122.43 3.8653 -179.83 0.022595 -141.19 0.41893 -84.53
1700 0.74872 -131.39 3.7082 163.93 0.025757 -151.95 0.37494 -83.039
1800 0.73694 -136.12 3.2889 151.43 0.028723 -159.76 0.37623 -75.376
1900 0.72495 -140.5 2.8909 144.75 0.032248 -166.26 0.39672 -74.117
2000 0.71031 -143.68 2.5973 137.69 0.035033 -172.96 0.41935 -76.724
2100 0.70624 -145.83 2.3705 134.96 0.040913 -175.76 0.41706 -79.974
2200 0.70128 -148.39 2.1802 132.27 0.042424 -177.68 0.42505 -82.499
2300 0.68799 -150.21 2.1075 128.83 0.04447 178.79 0.41968 -85.106
Table 3. MAX2654 Typical Scattering Parameters, VCC = +3.0V, TA= +25°C
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
14 ______________________________________________________________________________________
Table 4. MAX2655 Typical Scattering Parameters at RBIAS = 511Ω±1%, VCC = +3.0V,
TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.59723 -79.498 0.91247 -34.897 0.001646 -99.959 0.88117 119.82
1100 0.59068 -83.632 1.5336 -45.588 0.001988 -51.718 0.83976 103.15
1200 0.5904 -87.65 2.3117 -61.383 0.004163 -82.928 0.76535 81.178
1300 0.58711 -92.428 3.2473 -83.97 0.009779 -84.17 0.6117 52.977
1400 0.57106 -94.34 3.5861 -101.87 0.011201 -86.383 0.50664 20.5
1500 0.57768 -98.258 4.3458 -123.9 0.014933 -97.965 0.34119 -28.685
1575 0.5781 -103.91 4.4302 -144.19 0.019118 -105.2 0.25507 -71.998
1600 0.57857 -104.48 4.4008 -145.38 0.021184 -104.74 0.2367 -80.898
1620 0.57926 -105.5 4.4007 -152.89 0.021729 -109.4 0.22368 -95.033
1700 0.58239 -105.06 4.2803 -163.13 0.025452 -113.29 0.18985 -127.47
1800 0.58188 -108.51 3.9687 -177.21 0.033166 -119.88 0.14956 -160.12
1900 0.58208 -112.6 3.6829 171.11 0.040325 -130.27 0.10041 176.36
2000 0.57675 -117.04 3.3552 161.3 0.04621 -137.07 0.051383 164.53
2100 0.57434 -121.08 3.0813 153.88 0.05145 -145.65 0.012452 -134.07
2200 0.56774 -125.61 2.8336 148.07 0.057267 -149.16 0.047711 -71.583
2300 0.55458 -130.74 2.6639 143.06 0.065198 -162.21 0.08445 -72.804
Table 5. MAX2655 Typical Scattering Parameters at RBIAS = 698Ω±1%, VCC = +3.0V,
TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.62911 -82.450 0.7970 -31.488 0.003002 -104.85 0.88535 119.82
1100 0.62089 -87.005 1.3504 -42.208 0.002523 -50.324 0.84118 103.08
1200 0.61345 -91.280 2.0452 -58.035 0.006107 -69.38 0.76587 80.942
1300 0.60597 -95.939 2.909 -80.743 0.007511 -83.194 0.61307 52.718
1400 0.58802 -98.286 3.2138 -99.165 0.009273 -87.97 0.50978 20.058
1500 0.59164 -102.20 3.9422 -121.36 0.015381 -93.01 0.34549 -30.318
1575 0.5791 -103.91 4.0102 -144.19 0.019118 -105.2 0.25507 -71.998
1600 0.58714 -105.34 3.9948 -143.14 0.019579 -106.65 0.24268 -82.625
1620 057926 -105.5 3.9947 -152.89 0.021729 -109.4 0.22368 -95.033
1700 058676 -108.86 3.9023 -161.16 0.024241 -112.37 019587 -128.98
1800 0.5838 -111.82 3.6272 -175.31 0.03086 -123.02 0.15783 -162.20
1900 0.58607 -116.03 3.3953 172.74 0.035557 -125.05 0.11288 173.18
2000 0.57619 -120.26 3.0665 162.89 0.044106 -139.82 0.062055 157.77
2100 0.57242 -124.54 2.8205 155.08 0.049281 -144.9 0.010666 179.03
2200 0.56566 -129.00 2.6196 148.86 0.05691 -150.75 0.035549 -70.369
2300 0.54936 -133.16 2.4634 144.01 0.062178 -160.01 0.072149 -70.836
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 15
Table 6. MAX2655 Typical Scattering Parameters at RBIAS = 357Ω±1%, VCC = +3.0V,
TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.56876 -75.638 1.0228 -38.37 0.001432 -136.5 0.8844 119.99
1100 0.57354 -79.615 1.7113 -48.788 0.002037 -47.677 0.83949 103.13
1200 0.5752 -83.616 2.5583 -64.464 0.003745 -50.552 0.76395 81.134
1300 0.57611 -88.862 3.5894 -86.844 0.009650 -90.04 0.61396 53.171
1400 0.56217 -90.251 3.9229 -104.69 0.010893 -89.806 0.51183 21.274
1500 0.57443 -94.617 4.739 -126.43 0.016353 -96.328 0.33751 -27.732
1575 0.5791 -103.91 4.4302 -144.19 0.019118 -105.2 0.25507 -71.998
1600 0.57728 -97.916 4.7639 -148.03 0.021107 -101.47 0.23015 -78.116
1620 0.57926 -105.5 4.4247 -152.89 0.021729 -109.4 0.22368 -95.033
1700 0.58263 -101.81 4.6153 -165.15 0.027176 -110.56 0.18109 -124.28
1800 0.58172 -104.76 4.2503 -179.13 0.03404 -122.93 0.14227 -156.86
1900 0.59021 -109.2 3.9613 169.66 0.038478 -129.77 0.093038 179.75
2000 0.58544 -113.89 3.5876 159.82 0.047157 -138.47 0.042695 170.54
2100 0.57845 -118.56 3.2684 152.7 0.051896 -148.68 0.01988 -102.15
2200 0.56916 -123.03 3.0232 147.26 0.059345 -152.11 0.056446 -73.103
2300 0.55644 -128.01 2.8345 142.19 0.068672 -160.17 0.089954 -74.995
Table 7. MAX2656 Typical Scattering Parameters, High-Gain Mode, at RBIAS = 511Ω±1%,
VCC = +3.0V, TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.63142 -73.825 2.4002 -129.06 0.004147 -162.52 0.87308 -41.315
1100 0.59051 -78.03 2.3671 -134.38 0.006135 -171.89 0.85424 -46.229
1200 0.56752 -81.06 2.6326 -135.42 0.007461 -167.15 0.83104 -52.424
1300 0.55826 -83.912 3.1307 -140.07 0.007440 -164.59 0.79537 -59.678
1400 0.56002 -87.34 3.5568 -147.38 0.007593 -150.02 0.73564 -67.835
1500 0.57586 -91.116 4.2531 -158.4 0.010095 -155.76 0.65006 -75.902
1600 0.5864 -96.435 4.4809 -171.35 0.014417 -152.43 0.54267 -81.344
1700 0.58857 -101.08 4.6783 177.69 0.016613 -151.45 0.45374 -84.916
1800 0.59955 -104.86 4.7700 166.1 0.020609 -148.24 0.35275 -85.393
1900 0.61044 -111.2 4.7424 154.87 0.027411 -153.76 0.27393 -74.748
1960 0.61106 -114.86 4.4121 147.65 0.030933 -160.6 0.2662 -65.175
2000 0.60275 -117.39 4.4603 142.14 0.031396 -160.69 0.27338 -58.225
2100 0.5816 -122.38 3.9604 134.23 0.038737 -171.08 0.31122 -52.379
2200 0.56282 -126.82 3.6073 129.18 0.040865 -174.7 0.34011 -51.974
2300 0.53861 -129.73 3.4632 125.01 0.046903 177.28 0.3558 -51.606
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
16 ______________________________________________________________________________________
Table 8. MAX2656 Typical Scattering Parameters, High-Gain Mode, at RBIAS = 715Ω±1%,
VCC = +3.0V, TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.65417 -76.577 2.0972 -126.37 0.004827 -157.3 0.87164 -41.347
1100 0.61223 -81.359 2.0662 -132.14 0.007646 -176.69 0.85387 -46.243
1200 0.58803 -85.416 2.3137 -133.26 0.006931 176.19 0.83157 -52.222
1300 0.57284 -88.662 2.7587 -138.05 0.008049 -179.37 0.79484 -59.365
1400 0.57177 -92.515 3.1439 -145.48 0.009242 -170.62 0.7368 -67.732
1500 0.57713 -96.934 3.7542 -157.21 0.01181 -160.49 0.65204 -75.241
1600 0.56974 -101.32 3.8899 -168.44 0.013005 -171.4 0.56417 -80.603
1700 0.58537 -105.27 4.2754 179.89 0.015009 -169.91 0.45972 -86.097
1800 0.58777 -109.47 4.3029 167.18 0.019254 -164.09 0.35674 -85.284
1900 0.59151 -115.49 4.2368 156.26 0.024689 -158.71 0.28461 -75.109
1960 0.5879 -118.67 4.1202 149.05 0.029772 -167.86 0.27526 -66.353
2000 0.58103 -120.91 4.0174 143.56 0.03169 -172.44 0.28076 -60.399
2100 0.56299 -125.3 3.5892 135.43 0.036496 -176.25 0.3117 -54.613
2200 0.5465 -129.47 3.2602 130.49 0.038616 176.92 0.33593 -53.21
2300 0.52688 -132.31 3.1497 126.01 0.044776 169.97 0.353 -52.387
Table 9. MAX2656 Typical Scattering Parameters, High-Gain Mode, at RBIAS = 392Ω±1%,
VCC = +3.0V, TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.61065 -72.856 2.5553 -131.54 0.006128 -171.3 0.87014 -41.226
1100 0.57072 -76.554 2.5192 -136.87 0.005300 -159.81 0.85598 -46.123
1200 0.55098 -79.353 2.8016 -137.78 0.006555 -160.42 0.83153 -52.211
1300 0.54175 -81.962 3.318 -142.29 0.004925 -157.18 0.79761 -59.51
1400 0.54805 -84.946 3.7332 -149.1 0.006003 -166.66 0.73996 -67.659
1500 0.56671 -88.907 4.4738 -160.26 0.011463 -150.77 0.65201 -76.141
1600 0.58825 -93.587 4.7762 -172.86 0.013282 -145.52 0.53975 -82.014
1700 0.59684 -100.54 4.9302 173.74 0.018755 -145.57 0.43867 -82.87
1800 0.58878 -104.67 4.8003 164.29 0.021457 -151.64 0.37327 -83.035
1900 0.5977 -109.52 4.8936 154.68 0.027487 -153.88 0.28342 -76.068
1960 0.60772 -112.82 4.5669 146.91 0.03057 -160.36 0.26886 -66.794
2000 0.59892 -115.77 4.654 141.44 0.033049 -161.14 0.27694 -59.226
2100 0.58053 -121.04 4.1382 133.34 0.03994 -167.55 0.31279 -52.821
2200 0.56181 -125.41 3.7644 128.16 0.04132 -175.02 0.34147 -52.217
2300 0.54051 -128.62 3.6083 123.89 0.046646 178.72 0.35893 -51.898
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 17
Table 10. MAX2656 Typical Scattering Parameters, Low-Gain Mode, at RBIAS = 511Ω±1%,
VCC = +3.0V, TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.56358 -88.715 0.84051 -149.67 0.015297 175.13 0.86855 -40.123
1100 0.52923 -92.674 0.75901 -155.8 0.018278 170.71 0.84663 -44.76
1200 0.51343 -96.676 0.778 -154.98 0.021931 171.79 0.81629 -50.425
1300 0.5009 -101.52 0.87339 -157.54 0.027437 166.27 0.77769 -56.827
1400 0.49349 -106.63 0.94312 -162.15 0.032736 164.54 0.71373 -63.478
1500 0.4779 -111.82 1.0788 -170.23 0.040246 156.47 0.63017 -68.924
1600 0.46179 -115.8 1.0969 -179.61 0.046081 148.9 0.54487 -70.976
1700 0.45273 -118.92 1.1205 171.9 0.048446 143.14 0.48753 -71.609
1800 0.44199 -121.58 1.0946 163.88 0.050701 135.71 0.43529 -69.697
1900 0.4371 -124.48 1.0608 159.43 0.050819 133.61 0.40827 -65.547
1960 0.4417 -125.66 1.0466 155.48 0.053261 128.84 0.3992 -64.245
2000 0.43465 -127.43 1.0571 152.57 0.051961 126.55 0.39624 -63.625
2100 0.42839 -129.89 1.0048 147.54 0.053704 124.59 0.40737 -59.963
2200 0.42111 -132.42 0.96251 144.32 0.055581 121.96 0.42112 -59.523
2300 0.41587 -134.52 0.98483 140.56 0.06043 122.24 0.4279 -59.786
Table 11. MAX2656 Typical Scattering Parameters, Low-Gain Mode, at RBIAS = 715Ω±1%,
VCC = +3.0V, TA= +25°C
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.6056 -88.657 0.75982 -146.06 0.015889 178.42 0.86446 -40.165
1100 0.5702 -93.113 0.68752 -152.25 0.017232 171.4 0.84454 -44.793
1200 0.55247 -97.548 0.70776 -151.47 0.021948 170.96 0.81898 -50.576
1300 0.53571 -102.64 0.80000 -153.99 0.025791 167.82 0.77568 -56.997
1400 0.52488 -107.75 0.86782 -159.15 0.031885 165.39 0.71084 -63.637
1500 0.5104 -113.16 0.99703 -167.72 0.040072 153.19 0.6273 -68.898
1600 0.49122 -116.88 1.0021 -177.05 0.043433 146.52 0.55193 -71.01
1700 0.4807 -120.74 1.0431 174.8 0.045797 137.82 0.47844 -73.067
1800 0.46643 -123.25 1.0207 166.35 0.048667 132.14 0.42493 -69.56
1900 0.46269 -126.4 0.99176 161.64 0.048765 128.39 0.40306 -65.393
1960 0.47755 -125.65 0.92385 157.45 0.05108 127.14 0.38593 -64.729
2000 0.45517 -129.51 0.98886 154.71 0.051638 122.9 0.39072 -63.064
2100 0.44712 -131.82 0.93888 149.53 0.052747 121.07 0.39978 -59.492
2200 0.44352 -134.29 0.90581 146.34 0.052671 122.67 0.41386 -59.001
2300 0.43357 -136.57 0.92722 142.19 0.057307 116.37 0.42251 -59.433
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
18 ______________________________________________________________________________________
FREQ.
(MHz) S11 MAG S11 PHASE
(Degrees) S21 MAG S21 PHASE
(Degrees) S12 MAG S12 PHASE
(Degrees) S22 MAG S22 PHASE
(Degrees)
1000 0.53264 -88.293 0.88824 -152.39 0.016235 -178.61 0.86648 -40.242
1100 0.50072 -91.951 0.7982 -158.26 0.017245 173.56 0.84349 -44.872
1200 0.48919 -95.727 0.81624 -157.63 0.021876 174.25 0.81736 -50.593
1300 0.47763 -100.56 0.9124 -159.79 0.024819 169.5 0.77697 -56.992
1400 0.46996 -105.52 0.97835 -164.35 0.031537 165.94 0.7125 -63.162
1500 0.45962 -110.53 1.1147 -172.07 0.039354 157.02 0.63149 -68.884
1600 0.44558 -114.16 1.1435 179.16 0.043858 150.97 0.54309 -71.323
1700 0.43752 -117.82 1.1673 170.03 0.048587 142.5 0.48004 -70.756
1800 0.42628 -120.34 1.1355 162.29 0.051739 135.63 0.44669 -68.481
1900 0.42389 -123.02 1.1015 157.68 0.053776 132.1 0.41378 -66.261
1960 0.43163 -123.7 1.3169 152.69 0.052288 130.37 0.39665 -64.55
2000 0.42186 -126.21 1.0881 150.97 0.053244 125 0.39825 -63.294
2100 0.41708 -128.29 1.0382 146.08 0.055868 126.22 0.40867 -59.626
2200 0.41316 -131.21 0.98792 143.08 0.055845 123.81 0.4238 -59.446
2300 0.40531 -132.94 1.0068 139.47 0.061111 121.9 0.42905 -59.37
Table 13. MAX2654 Typical Noise Parameters, VCC = +3.0V, TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 0.979185 0.325805 63.6899 65.3207
1100 1.00543 0.311346 70.7686 60.4145
1200 1.0429 0.299983 78.5972 55.7724
1300 1.09161 0.291978 87.1956 51.3341
1400 1.15308 0.288025 96.5545 47.0509
1500 1.22964 0.289009 106.565 42.8944
1575 1.29821 0.29339 114.342 39.8666
1600 1.32323 0.295542 116.952 38.8794
1620 1.34399 0.297509 119.036 38.0995
1700 1.4328 0.307178 127.265 35.0936
1800 1.55051 0.321605 136.997 31.7107
1900 1.66007 0.334857 145.771 28.9489
2000 1.74337 0.343223 153.463 26.9638
2100 1.79294 0.345512 160.179 25.7497
2200 1.81624 0.343289 166.128 25.1452
2300 1.82749 0.339207 171.504 24.9322
Table 12. MAX2656 Typical Scattering Parameters, Low-Gain Mode, at RBIAS = 392Ω±1%,
VCC = +3.0V, TA= +25°C
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 19
Table 14. MAX2655 Typical Noise Parameters, RBIAS = 511Ω±1%, VCC = +3.0V,
TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 1.07078 0.20268 58.6096 61.4167
1100 1.1004 0.185133 66.3785 57.7698
1200 1.14332 0.17169 75.3428 54.4141
1300 1.20144 0.163399 85.5832 51.241
1400 1.27902 0.161846 96.8769 48.1459
1500 1.38209 0.168551 108.539 45.0343
1575 1.47957 0.179266 116.958 42.6584
1600 1.51609 0.183813 119.635 41.8603
1620 1.54671 0.187747 121.72 41.2213
1700 1.67956 0.205317 129.542 38.6947
1800 1.85425 0.227554 138.264 35.7715
1900 2.00371 0.243698 146.235 33.4173
2000 2.09593 0.249742 153.934 31.8644
2100 2.13004 0.246809 161.641 31.1189
2200 2.13006 0.239032 169.387 31.0069
2300 2.12127 0.230293 177.009 31.3045
Table 15. MAX2655 Typical Noise Parameters, RBIAS = 357Ω±1%, VCC = +3.0V,
TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 1.09982 0.148395 58.9284 58.1506
1100 1.12955 0.133791 67.8012 55.2392
1200 1.17248 0.12367 78.2767 52.5393
1300 1.23093 0.119347 90.2698 49.9446
1400 1.30945 0.122497 103.037 47.3479
1500 1.4141 0.134308 115.29 44.6485
1575 1.513 0.148721 123.496 42.522
1600 1.54997 0.154421 126.008 41.7955
1620 1.58092 0.159239 127.94 41.2099
1700 1.71459 0.179965 135.058 38.8633
1800 1.88848 0.205269 142.995 36.1035
1900 2.03494 0.223676 150.524 33.8713
2000 2.12324 0.231506 158.139 32.4267
2100 2.1538 0.230145 166.018 31.7928
2200 2.15105 0.223842 174.051 31.7989
2300 2.14016 0.216468 181.947 32.2145
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
20 ______________________________________________________________________________________
Table 16. MAX2655 Typical Noise Parameters, RBIAS = 698Ω±1%, VCC = +3.0V,
TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 1.07022 0.252072 59.5039 63.9045
1100 1.09989 0.232117 66.7513 59.6017
1200 1.1435 0.216167 74.9793 55.6721
1300 1.2025 0.205039 84.2738 52.0034
1400 1.28093 0.200132 94.5649 48.4913
1500 1.38483 0.202967 105.469 45.0448
1575 1.48313 0.210624 113.637 42.4731
1600 1.52003 0.214164 116.293 41.62
1620 1.551 0.217306 118.382 40.9407
1700 1.68587 0.231911 126.349 38.2818
1800 1.86477 0.251081 135.356 35.2455
1900 2.01955 0.2649 143.506 32.8111
2000 2.1163 0.269182 151.19 31.186
2100 2.15311 0.264831 158.724 30.3614
2200 2.15452 0.255836 166.217 30.161
2300 2.14655 0.246007 173.591 30.3681
Table 17. MAX2656 Typical Noise Parameters, RBIAS = 511Ω±1%, VCC = +3.0V,
TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 1.19551 0.169443 44.0607 63.6454
1100 1.25513 0.160031 50.0233 61.2689
1200 1.36496 0.157156 53.9632 60.0078
1300 1.41944 0.139411 55.9695 58.3406
1400 1.42267 0.116105 64.9694 55.1066
1500 1.46779 0.104328 78.4081 52.1186
1600 1.54085 0.100413 92.5998 49.5511
1700 1.62591 0.100408 105.865 47.3525
1800 1.71232 0.101354 117.69 45.5365
1900 1.79336 0.101439 128.291 44.1212
1960 1.83815 0.100789 134.246 43.4616
2000 1.86641 0.10007 138.099 43.0969
2100 1.93225 0.0974895 147.452 42.4256
2200 1.99354 0.0942623 156.495 42.0541
2300 2.05347 0.0909155 165.19 41.9247
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
______________________________________________________________________________________ 21
Table 18. MAX2656 Typical Noise Parameters, RBIAS = 392Ω±1%, VCC = +3.0V,
TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 1.25828 0.127169 43.4181 60.0914
1100 1.31712 0.119749 49.6564 58.328
1200 1.42071 0.118918 53.0395 57.6261
1300 1.47047 0.102868 54.249 56.3473
1400 1.47793 0.0808445 65.2714 53.4808
1500 1.52693 0.0714433 82.9841 50.8759
1600 1.60271 0.07102 101.079 48.6601
1700 1.68966 0.0747457 116.687 46.766
1800 1.77731 0.0790839 129.705 45.2077
1900 1.85912 0.082153 141.03 44.0114
1960 1.90423 0.0831517 147.358 43.4686
2000 1.93266 0.0834911 151.457 43.177
2100 1.99887 0.0834491 161.414 42.6749
2200 2.06055 0.0826143 171.004 42.457
2300 2.12098 0.081456 180.109 42.4679
Table 19. MAX2656 Typical Noise Parameters, RBIAS = 715Ω±1%, VCC = +3.0V,
TA= +25°C
FREQUENCY
(MHz) NFMIN (dB) IΓoptIΓopt (ANGLE) RN(Ω)
1000 1.13783 0.224059 45.2905 68.1525
1100 1.2001 0.212085 51.1614 64.8648
1200 1.32167 0.206499 55.7433 62.7276
1300 1.38403 0.186443 58.447 60.5143
1400 1.38075 0.161577 66.0016 56.8728
1500 1.42109 0.147473 76.7421 53.4273
1600 1.49177 0.140468 88.2322 50.4268
1700 1.57596 0.137104 99.3829 47.8521
1800 1.66249 0.134825 109.699 45.7189
1900 1.74421 0.131957 119.148 44.0357
1960 1.78956 0.129654 124.484 43.2336
2000 1.81821 0.12787 127.937 42.78
2100 1.88506 0.122729 136.303 41.9037
2200 1.94729 0.117055 144.391 41.3473
2300 2.00801 0.111392 152.221 41.0509
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
22 ______________________________________________________________________________________
Package Information
SC70, 6L.EPS