MAX2674_V01 [MAXIM]
GPS/GNSS LNAs with Antenna Switch and Bias;
| 型号： | MAX2674_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | GPS/GNSS LNAs with Antenna Switch and Bias 全球定位系统 |
| 文件： | 总9页 (文件大小：1385K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
General Description
Features
S Eliminate Discrete Antenna Sensing, Switching,
and Bias Networks
The MAX2674/MAX2676 are ultra-small, high-IP3, low-
noise amplifiers (LNAs) designed for GPS L1, Galileo,
and GLONASS applications. Designed in Maxim’s
advanced SiGe process, the devices are also equipped
with an autosensing feature for applications that enable
the use of external antennas. These high-performance
LNAs provide high gain and an ultra-low noise figure
while optimizing the input-referred 2dB compression
point and 3rd-order intercept point.
Autodetect Antenna Connection
Provide Antenna Bias
Short-Circuit Protection
S Wide 1.6V to 3.6V Supply Voltage Range
S Ultra-Small Footprint (0.86mm x 1.26mm) WLP
Package
S For Applications Without Antenna Port, Use Pin-
Compatible 4-Bump MAX2686/MAX2687/MAX2688
LNA
The ultra-small size is ideal for front-end modules and
receiver applications in cellular phones, smartphones,
PDAs, PNDs, or other custom GNSS applications. The
MAX2674/MAX2676 operate from a 1.6V to 3.6V single
supply. The MAX2674 is optimized for high gain, while
the MAX2676 is optimized for high linearity. A shutdown
feature is present in both devices reducing the supply
current to less than 10FA. The antenna port automati-
cally senses when an external antenna is connected,
eliminating the need for additional control circuitry
while also providing improved short-circuit protection.
The MAX2674/MAX2676 are available in an ultra-small,
RoHS-compliant 0.86mm x 1.26mm x 0.64mm wafer-
level package (WLP).
Applications
Front-End SAW Modules
Receiver Modules
Cellular and Smartphones
Telematics (Asset Tracking and Management)
Personal Navigation Devices (PNDs)
Recreational, Marine Navigation
Ordering Information
PART
TEMP RANGE
-40NC to +85NC
-40NC to +85NC
PIN-PACKAGE
6 WLP
MAX2674EWT+T
MAX2676EWT+T
6 WLP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit
1.6V TO 3.6V
MAX2674
MAX2676
100pF
A1
A2
RFOUT
SHDN
10pF
V
CC
RFOUT/SHDN
25kI
39pF
OPTIONAL
100pF
88nH
B1
B2
RFIN
OPTIONAL
GNDAC
ANT
BIAS
ACTIVE
ANTENNA
C1
C2
ANT
GNDDC
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-5670; Rev 1; 7/15
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
ABSOLUTE MAXIMUM RATINGS
CC
Other Pins to GND_.................................. -0.3V to (V
Maximum Input Power.....................................................+5dBm
V
to GND_........................................................-0.3V to +3.9V
Operating Temperature Range.......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -65NC to +160NC
Soldering Temperature (reflow, Note 1)..........................+260NC
+ 0.3V)
CC
Continuous Power Dissipation (T = +70NC)
A
WLP (derate 10.5mW/NC above +70NC)......................840mW
Note 1: Refer to Application Note 1891: Wafer-Level Packaging (WLP) and its Applications.
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.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 1.6V to 3.6V, no RF signal applied, T = -40NC to +85NC. Typical values are at V
= 3.3V, T = +25NC, unless otherwise
CC A
A
noted.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
3.3
MAX
3.6
7
UNITS
V
Supply Voltage
1.6
Supply Current
4.5
mA
FA
V
Shutdown Current
Shutdown Logic-Low
Shutdown Logic-High
ANT Sense Threshold
ANT Current Limit
ANT Port Supply Drop
10
V
= 0V
SHDN
0.45
1.2
75
20
V
Causes autosense to switch to ANT
ANT connected to GND_
200
30
850
45
FA
mA
mV
Voltage drop from V
with 10mA load on ANT
75
CC
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 1.6V to 3.6V, f
= 1575.42MHz, T = -40NC to +85NC. Typical values are at V
= 3.3V, T = +25NC, unless otherwise
CC A
RFIN
A
noted.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum RF Input
Frequency
1575.42
MHz
Maximum RF Input
Frequency
1610
MHz
MAX2674
MAX2676
13
11
18
15
Power Gain
dB
dB
Noise Figure
In-Band Input IP3
0.75
-2
MAX2674, RF input = f Q2.5MHz at -40dBm each
O
dBm
dBm
MAX2676, RF input = f Q2.5MHz at -40dBm each
+5
O
ANT In-Band Input IP3
RF input = f Q2.5MHz at -25dBm each
+30
O
2
Maxim Integrated
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 1.6V to 3.6V, f
= 1575.42MHz, T = -40NC to +85NC. Typical values are at V
= 3.3V, T = +25NC, unless otherwise
CC A
RFIN
A
noted.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
MAX2674, RF input = 1713.42MHz, -17dBm and
1851.42MHz, -59dBm
3
Out-of-Band Input IP3
Input P2dB
dBm
MAX2676, RF input = 1713.42MHz, -17dBm and
1851.42MHz, -59dBm
5
MAX2674, f
MAX2676, f
= 1580.42MHz
= 1580.42MHz
-7
-4
RFIN
dBm
RFIN
Input Return Loss
Output Return Loss
Reverse Isolation
ANT Insertion Loss
RFIN to ANT Isolation
15
15
45
1.5
45
dB
dB
dB
dB
dB
Note 2: Guaranteed by test at T = +25NC, guaranteed by design and characterization at T = -40NC and T = +85NC.
A
A
A
Typical Operating Characteristics
= 3.3V, T = +25NC, unless otherwise specified.)
(MAX2674/MAX2676 EV Kit. Typical values are at V
CC
A
MAX2674 INPUT RETURN LOSS
vs. FREQUENCY
MAX2674 REVERSE ISOLATION
vs. FREQUENCY
MAX2674 GAIN vs. FREQUENCY
0
-5
25
20
15
10
5
0
-10
-20
-30
-40
-50
-60
-70
LNA
-10
-15
-20
-25
-30
-35
-40
-45
ANTENNA
LNA
LNA
ANTENNA
0
-5
-10
-15
ANTENNA
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
Maxim Integrated
3
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
Typical Operating Characteristics (continued)
(MAX2674/MAX2676 EV Kit. Typical values are at V
= 3.3V, T = +25NC, unless otherwise specified.)
CC
A
MAX2674 ACTIVE PATH IN-BAND IIP3
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz AND
2MHz OFFSET WITH -30dBm/TONE)
MAX2674 ANTENNA PATH IN-BAND IIP3
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz
MAX2674 OUTPUT RETURN LOSS
vs. FREQUENCY
AND 2MHz OFFSET WITH -10dBm/TONE)
0
-5
0
-1
-2
-3
-4
32.0
31.5
31.0
30.5
30.0
29.5
29.0
-40°C
+85°C
+25°C
-10
-15
-20
-25
-30
ANTENNA
+25°C
LNA
-40°C
+85°C
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
MAX2674 ACTIVE PATH OUT-OF-BAND IIP3
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TONE1 AT -27dBm/1713MHz, TONE2 AT -39dBm/1851MHz)
5
MAX2674 ACTIVE PATH INPUT P2dB
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TONE1 AT -27dBm/1713MHz, TONE2 AT -39dBm/1851MHz)
-4
+25°C
-5
-6
-40°C
4
3
-7
+85°C
2
-8
-9
1
+25°C
-10
-11
-12
-13
-14
0
+85°C
-1
-2
-3
-40°C
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
MAX2674 ACTIVE PATH 2dB GAIN
DESENSE vs. BLOCKER FREQUENCY
MAX2676 INPUT RETURN LOSS
vs. FREQUENCY
0
0
-5
LNA
-1
-2
-3
-4
-5
-6
-7
-8
-10
-15
-20
-25
-30
-35
-40
-45
ANTENNA
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
4
Maxim Integrated
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
Typical Operating Characteristics (continued)
(MAX2674/MAX2676 EV Kit. Typical values are at V
= 3.3V, T = +25NC, unless otherwise specified.)
CC
A
MAX2676 REVERSE ISOLATION
vs. FREQUENCY
MAX2676 OUTPUT RETURN LOSS
vs. FREQUENCY
MAX2676 GAIN vs. FREQUENCY
25
20
15
10
5
0
-10
-20
-30
-40
-50
-60
-70
0
-5
LNA
ANTENNA
LNA
-10
-15
-20
-25
-30
-35
-40
ANTENNA
LNA
0
-5
ANTENNA
-10
-15
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
MAX2676 ACTIVE PATH IN-BAND IIP3
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz
MAX2676 ANTENNA PATH IN-BAND IIP3
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TWO TONES LOCATED AT 1MHz
MAX2676 ACTIVE PATH OUT-OF-BAND IIP3
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TONE1 AT -27dBm/1713MHz,
AND 2MHz OFFSET WITH -30dBm/TONE)
AND 2MHz OFFSET WITH -10dBm/TONE)
TONE2 AT -39dBm/1851MHz)
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
32.0
31.5
31.0
30.5
30.0
29.5
29.0
8
+85°C
7
6
5
4
3
2
1
+85°C
+85°C
-40°C
+25°C
+25°C
-40°C
+25°C
-40°C
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
MAX2676 ACTIVE PATH INPUT P2dB
vs. SUPPLY VOLTAGE AND TEMPERATURE
(TONE1 AT -27dBm/1713MHz, TONE2 AT -39dBm/1851MHz)
-2
MAX2676 ACTIVE PATH 2dB GAIN
DESENSE vs. BLOCKER FREQUENCY
4
3
-3
-4
2
+85°C
-5
1
0
-6
-7
-8
-1
-2
-3
-4
-5
-6
-40°C
-9
-10
+25°C
-11
-12
500 750 1000 1250 1500 1750 2000 2250 2500
FREQUENCY (MHz)
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
SUPPLY VOLTAGE (V)
Maxim Integrated
5
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
Bump Configuration
TOP VIEW
MAX2674
MAX2676
RFOUT/SHDN
GNDAC
V
A1
B1
C1
A2
B2
C2
CC
RFIN
ANT
GNDDC
Bump Description
PIN
NAME
FUNCTION
A1
V
CC
V . Place bypass capacitor as close as possible to the pin.
CC
RFOUT/
SHDN
RF Output and Shutdown Logic Input. Output match is included on-chip. Couple SHDN logic control
through a 25kIresistor. DC logic-low shuts down the part.
A2
B1
B2
RFIN
RF Input. Requires a DC-blocking capacitor and an external inductor matching component.
Ground for RF Circuits. Connect to the 2nd layer PCB ground plane with a via next to the pad.
GNDAC
Ground for DC and Bias Circuits. Connect to the 2nd layer PCB ground plane with a via next to the
pad.
C1
C2
GNDDC
ANT
Antenna Input
6
Maxim Integrated
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
DC Supply Decoupling and Layout
Detailed Description
The MAX2674/MAX2676 are low-power LNAs designed
for GPS/GNSS receiver applications. The devices feature
low noise and high linearity in an ultra-small package.
They also include an antenna switch and circuitry sup-
porting bias to accommodate external LNA applications.
A properly designed PC board (PCB) is essential to any
RF microwave circuit. Use controlled-impedance lines
on all high-frequency inputs and outputs. Bypass V
CC
with a decoupling capacitor located close to the device.
For long V lines, it may be necessary to add additional
decoupling capacitors. Locate these additional capaci-
tors further away from the device package.
CC
Input and Output Matching
To achieve optimal performance in noise figure, gain,
and IIP3, the devices require one matching inductor at
RFIN in series with a DC-blocking capacitor. RFOUT/
SHDN is internally matched to 50I, eliminating the need
for external matching components. At RFOUT/SHDN, an
external DC-blocking capacitor should be used to isolate
the shutdown control function.
Proper grounding of GND_ pins is essential. If the PCB
uses a top-side RF ground, connect it directly to the
GND_ pins. For a board where the ground is not on the
component layer, connect the GND_ pins to the board
with multiple vias close to the package.
Antenna Switch Control
The MAX2674/MAX2676 ANT input includes an autode-
tection feature. When no current is drawn from ANT, the
switch defaults to normal LNA operation. The pin can be
directly connected to an external active antenna. The
device automatically switches to the ANT input when an
external active antenna is connected.
Shutdown Mode
To place the device in shutdown mode, apply logic-low
to RFOUT/SHDN through a 25kΩ resistor. An additional
DC-blocking capacitor or component is required at
RFOUT/SHDN in this case. Apply a logic-high state or no
DC bias to turn the part permanently on.
Refer to www.maximintegrated.com for the MAX2674/
MAX2676 EV Kit schematic, layout files, BOM information,
and S-parameters.
Table 1. MAX2674 Typical Noise Parameters (V
= 2.85V, T = +25°C)
CC
A
FREQUENCY (MHz)
NF
(dB)
Rn (I)
8.33
8.33
8.32
8.31
8.3
MIN
GAMMA_OPT MAG (°)
GAMMA_OPT PHASE (°)
1550
1560
1570
1580
1590
1600
0.651
0.652
0.654
0.655
0.656
0.657
0.446
0.445
0.445
0.444
0.444
0.443
44.1
44.3
44.6
44.8
45.1
45.4
8.3
Table 2. MAX2676 Typical Noise Parameters (V
= 2.85V, T = +25°C)
CC
A
FREQUENCY (MHz)
NF
(dB)
Rn (I)
8.7
MIN
GAMMA_OPT MAG (°)
GAMMA_OPT PHASE (°)
1550
1560
1570
1580
1590
1600
0.744
0.746
0.748
0.75
0.441
53.1
53.4
53.7
54
0.44
8.68
8.66
8.65
8.63
8.62
0.439
0.438
0.437
0.436
0.751
0.753
54.3
54.7
Maxim Integrated
7
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
Chip Information
Package Information
For the latest package outline information and land patterns, go
to www.maximintegrated.com/packages. Note that a “+”, “#”,
or “-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PROCESS: SiGe BiCMOS
PACKAGE PACKAGE
LAND
PATTERN NO.
OUTLINE NO.
21-0217
TYPE
CODE
Refer to
Application Note
1891
6 WLP
W61B1+1
8
Maxim Integrated
MAX2674/MAX2676
GPS/GNSS LNAs with Antenna Switch and Bias
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
12/10
7/15
0
1
Initial release
Removed Avionics and Military from Applications
—
1
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
9
©
2015 Maxim Integrated Products, Inc.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
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