19-5479; Rev 0; 8/10
TION KIT
EVALUA BLE
AVAILA
Tiny Low-Noise Amplifiers for HSPA/LTE
General Description
The MAX2666/MAX2668 are a family of low-noise ampli-
fiers (LNAs) intended for use in HSPA mobile handsets.
The LNAs provide three programmable gain states,
delivering superior optimization for linearity and sensitiv-
ity versus traditional two-gain-state LNAs.
The MAX2666 is optimized for use over the 2100MHz
to 2200MHz frequency range (bands 1, 4, and 10) and
offers a typical maximum gain of 14.5dB.
The MAX2668 is optimized for use over the 850MHz to
1000MHz frequency range (bands 5, 6, and 8) and pro-
vides a typical maximum gain of 17dB.
Each device is available in a tiny 1mm x 1.5mm, 6-pin
ultra-thin LGA package.
S
Thin Profile: 0.55mm
S
Low Noise Figure
Features
S
Small Footprint: 1mm x 1.5mm Package
MAX2666/MAX2668
1dB for MAX2668
1.1dB for MAX2666
S
Three Gain States for Optimum Blocker Handling
S
3.8mA Low Supply Current
S
Low Bill of Materials
Ordering Information
PART
MAX2666EYT+
MAX2668EYT+
TEMP RANGE
-40NC to +85NC
-40NC to +85NC
PIN-PACKAGE
6 Ultra-Thin LGA
6 Ultra-Thin LGA
Applications
HSPA/LTE Front-End Modules
HSPA/LTE Preamplification
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit
MAX2666
MAX2668
LNA_IN
GAIN CONTROL TABLE FOR TWO GAIN STEPS
GAIN1
6
V
CC
0
1
GAIN0
—
—
GAIN
LOW
HIGH
1
GAIN CONTROL TABLE FOR THREE GAIN STEPS
GAIN1
2
CHOKE +
MATCHING
5
GAIN1
GAIN0
0
0
1
1
3
4
LNA_OUT
GAIN0
0
1
0
1
GAIN
OFF
LOW
MID
HIGH
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Tiny Low-Noise Amplifiers for HSPA/LTE
MAX2666/MAX2668
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND..........................................................-0.3V to +3.6V
Other Pins to GND ................................... -0.3V to (V
CC
+ 0.3V)
Maximum Input Power................................................... +10dBm
Continuous Power Dissipation (T
A
= +70NC)
Ultra-Thin LGA (derate 2.1mW/NC above +70NC) .......167mW
CAUTION!
ESD SENSITIVE DEVICE
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.
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +160NC
Lead Temperature (soldering, 10s) ................................+260NC
Soldering Temperature (reflow) ......................................+260NC
DC ELECTRICAL CHARACTERISTICS
(Typical
Operating Circuit,
MAX2666/MAX2668 Evaluation Kit, GAIN1 = High, GAIN0 = High-Z, V
CC
= 2.7V to 3.3V, no RF signal
applied, T
A
= -40NC to +85NC. Typical values are at V
CC
= 2.85V, T
A
= +25NC, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage
Supply Current, High Gain
Supply Current, Mid Gain
Supply Current, Low Gain
Shutdown Current
Logic-High (V
IH
)
Logic-Low (V
IL
)
GAIN_ = 11
GAIN_ = 10
GAIN_ = 01
GAIN_ = 00
1.2
0.5
CONDITIONS
MIN
2.7
TYP
2.85
3.8
3.8
100
100
MAX
3.3
UNITS
V
mA
mA
FA
FA
V
V
AC ELECTRICAL CHARACTERISTICS
(MAX2666/MAX2668 Evaluation Kit, input matching network according to Table 1 (input matching network), GAIN1 = High, GAIN0 =
High-Z, V
CC
= 2.85V, T
A
= +25NC, unless otherwise noted.)
PARAMETER
MAX2666
Frequency Range
Gain
Bands 1, 4, 10
HG mode
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
HG mode
Noise Figure
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
HG mode
Input 3rd-Order Intercept (Note 2)
Phase Shift with Gain Step
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
2110
10
0
-15.5
2140
14.5
5
-12
1.1
3
12
-2
4
> 20
15
Degrees
dBm
dB
2170
17.5
8.5
-9
dB
MHz
CONDITIONS
MIN
TYP
MAX
UNITS
2
______________________________________________________________________________________
Tiny Low-Noise Amplifiers for HSPA/LTE
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2666/MAX2668 Evaluation Kit, input matching network according to Table 1 (input matching network), GAIN1 = High, GAIN0 =
High-Z, V
CC
= 2.85V, T
A
= +25NC, unless otherwise noted.)
PARAMETER
MAX2668 (BAND 8)
Frequency Range
Gain
Band 8
HG mode
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
HG mode
Noise Figure
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
HG mode
Input 3rd-Order Intercept (Note 2)
Phase Shift with Gain Step
MAX2668 (BAND 5, BAND 6)
Frequency Range
Gain
Bands 5 and 6
HG mode
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
HG mode
Noise Figure
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
HG mode
Input 3rd-Order Intercept (Note 2)
Phase Shift with Gain Step
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
869
13.5
0
-19
881.52
17
5
-16
1
5
16
-5
2
> 18
15
Degrees
dBm
dB
894
21
8
-13
dB
MHz
MG mode, GAIN_ = 10
LG mode, GAIN_ = 01
925
13.5
0
-19
942
17
5
-16
1
5
16
-4
2
> 18
15
Degrees
dBm
dB
960
21
8
-13
dB
MHz
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2666/MAX2668
Note 1:
Guaranteed by test at T
A
= +25NC; guaranteed by designed and characterization at T
A
= -40NC and T
A
= +85NC.
Note 2:
-25dBm/tone at high gain, -15dBm/tone at mid gain, -15dBm/tone at low gain. Tone separation less than 5MHz.
_______________________________________________________________________________________
3
Tiny Low-Noise Amplifiers for HSPA/LTE
MAX2666/MAX2668
Typical Operating Characteristics
(MAX2666/MAX2668 Evaluation Kit. Typical values are at V
CC
= 2.85V, T
A
= +25°C, unless otherwise noted.)
MAX2666 GAIN
vs. FREQUENCY AND TEMPERATURE
HIGH-GAIN MODE
MAX2666 toc01
MAX2666 GAIN
vs. FREQUENCY AND TEMPERATURE
MID-GAIN MODE
MAX2666 toc02
MAX2666 GAIN
vs. FREQUENCY AND TEMPERATURE
LOW-GAIN MODE
MAX2666 toc03
16
6.0
-11.0
-11.5
-12.0
T
A
= -40°C
15
GAIN (dB)
5.5
GAIN (dB)
T
A
= -40°C
GAIN (dB)
5.0
-12.5
-13.0
-13.5
T
A
= +25°C
T
A
= -40°C
14
T
A
= +25°C
T
A
= +25°C
4.5
T
A
= +85°C
T
A
= +85°C
13
2110
2120
2130
2140
2150
2160
2170
RF FREQUENCY (MHz)
4.0
2110
2120
2130
2140
T
A
= +85°C
2150
2160
2170
RF FREQUENCY (MHz)
-14.0
2110
2120
2130
2140
2150
2160
2170
RF FREQUENCY (MHz)
MAX2666 NOISE FIGURE
vs. FREQUENCY AND TEMPERATURE
HIGH-GAIN MODE
MAX2666 toc04
MAX2666 IIP3 vs. SUPPLY
VOLTAGE AND TEMPERATURE
MID BAND 10; 5MHz TONE'S SEPARATION
24
22
20
18
16
14
12
10
8
6
4
2
0
-2
2.7
MAX2666 toc05
MAX2666 S11
HIGH-GAIN MODE
-1
-2
-3
S11 (dB)
-4
-5
-6
-7
-8
-9
-10
1500
2000
2500
FREQUENCY (MHz)
3000
3500
MAX2666 toc06
1.70
1.60
1.50
1.40
NF (dB)
1.30
1.20
1.10
1.00
0.90
0.80
0.70
2110
2120
2130
2140
2150
2160
0
T
A
= +85°C
T
A
= +25°C
LOW GAIN; T
A
= +85°C
LOW GAIN; T
A
= -40°C
MID GAIN; T
A
= -40°C
MID GAIN; T
A
= +85°C
IIP3 (dBm)
T
A
= -40°C
HIGH GAIN; T
A
= +85°C
HIGH GAIN; T
A
= -40°C
2170
2.8
2.9
3.0
3.1
3.2
3.3
RF FREQUENCY (MHz)
SUPPLY VOLTAGE (V)
MAX2666 S22
HIGH-GAIN MODE
MAX2666 toc07
MAX2666 S21
HIGH-GAIN MODE
MAX2666 toc08
MAX2666 S12
HIGH-GAIN MODE
-22
-24
-26
S12 (dB)
-28
-30
-32
-34
-36
-38
-40
1500
2000
2500
FREQUENCY (MHz)
3000
3500
MAX2666 toc09
0
-1
-2
-3
S22 (dB)
-4
-5
-6
-7
-8
-9
-10
1500
2000
2500
FREQUENCY (MHz)
3000
20
15
10
S21 (dB)
5
0
-5
-10
-20
3500
1500
2000
2500
FREQUENCY (MHz)
3000
3500
4
______________________________________________________________________________________
Tiny Low-Noise Amplifiers for HSPA/LTE
Typical Operating Characteristics (continued)
(MAX2666/MAX2668 Evaluation Kit. Typical values are at V
CC
= 2.85V, T
A
= +25°C, unless otherwise noted.)
MAX2668 GAIN
vs. FREQUENCY AND TEMPERATURE
HIGH-GAIN MODE
MAX2668 toc10
MAX2666/MAX2668
MAX2668 GAIN
vs. FREQUENCY AND TEMPERATURE
MID-GAIN MODE
MAX2668 toc11
MAX2668 GAIN
vs. FREQUENCY AND TEMPERATURE
LOW-GAIN MODE
T
A
= -40°C
-15
MAX2668 toc12
20
19
18
17
7
-14
T
A
= -40°C
T
A
= +25°C
6
GAIN (dB)
GAIN (dB)
T
A
= +25°C
GAIN (dB)
T
A
= -40°C
-16
T
A
= +85°C
T
A
= +25°C
16
5
T
A
= +85°C
T
A
= +85°C
4
860 870 880 890 900 910 920 930 940 950 960
RF FREQUENCY (MHz)
860 870 880 890 900 910 920 930 940 950 960
RF FREQUENCY (MHz)
-17
15
-18
860 870 880 890 900 910 920 930 940 950 960
RF FREQUENCY (MHz)
MAX2668 NOISE FIGURE
vs. FREQUENCY AND TEMPERATURE
HIGH-GAIN MODE
MAX2668 toc13
MAX2668 IIP3 vs. SUPPLY
VOLTAGE AND TEMPERATURE
MID BAND 8; 5MHz TONE'S SEPARATION
22
20
18
16
14
12
10
8
6
4
2
0
-2
-4
-6
2.7
MAX2668 toc14
MAX2668 S11
HIGH-GAIN MODE
-2
-4
-6
S11 (dB)
-8
-10
-12
-14
-16
-18
-20
500
1000
1500
FREQUENCY (MHz)
2000
2500
MAX2668 toc15
1.4
1.3
1.2
1.1
NF (dB)
1.0
0.9
0.8
0.7
0.6
0
T
A
= +85°C
IIP3 (dBm)
LOW GAIN; T
A
= -40°C
LOW GAIN; T
A
= +85°C
MID GAIN; T
A
= -40°C
MID GAIN; T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
HIGH GAIN; T
A
= +85°C
HIGH GAIN; T
A
= -40°C
2.8
2.9
3.0
3.1
3.2
3.3
860 870 880 890 900 910 920 930 940 950 960
RF FREQUENCY (MHz)
SUPPLY VOLTAGE (V)
MAX2668 S22
HIGH-GAIN MODE
-2
-4
-6
-8
S22 (dB)
-10
-12
-14
-16
-18
-20
-22
500
1000
1500
FREQUENCY (MHz)
2000
2500
S21 (dB)
MAX2668 toc16
MAX2668 S21
HIGH-GAIN MODE
15
10
S12 (dB)
5
0
-5
-10
-15
-20
500
1000
1500
FREQUENCY (MHz)
2000
2500
-45
-50
500
-30
-35
-40
MAX2668 toc17
MAX2668 S12
HIGH-GAIN MODE
MAX2668 toc18
0
20
-20
-25
1000
1500
FREQUENCY (MHz)
2000
2500
_______________________________________________________________________________________
5
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