MAX2634_V01 [MAXIM]
315MHz/433MHz Low-Noise Amplifier for Automotive RKE;
| 型号： | MAX2634_V01 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 315MHz/433MHz Low-Noise Amplifier for Automotive RKE |
| 文件： | 总8页 (文件大小：634K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EVALUATION KIT AVAILABLE
MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
General Description
Features
● Optimized for 308MHz, 315MHz, 418MHz,
The MAX2634 low-noise amplifier (LNA) with low-power
shutdown mode is optimized for 315MHz and 433.92MHz
automotive remote keyless entry (RKE) applications. At
315MHz, the LNA achieves 15.5dB power gain and a
1.25dB noise figure while only consuming 2.5mA of
supply current from a 2.2V to 5.5V power supply. An
integrated logic-controlled low-power shutdown mode
reduces power consumption to 0.1µA and replaces the
two transistors typically required to implement the shut-
down function in discrete-based RKE LNA solutions. The
device further reduces component count by integrating
the output matching and DC-blocking components, and
only requires a single inductor to match the input for best
noise figure and input return loss.
and 433.92MHz
● 2.2V to 5.5V Supply Voltage Range
● Low Operating Supply Current
2.5mA (typ), 4mA (max)
● Logic-Controlled 1µA (max) Shutdown
● Typical Performance at 315MHz
1.25dB Noise Figure
-16dBm Input IP3
15.5dB Power Gain
● Automotive Temperature Range
-40°C to +125°C
● ESD Rating of ±2.0kV (HBM) on All Pins
● AEC-Q100 Qualification
The device is available in a small 6-pin (2.0mm x 2.2mm
x 0.9mm) lead-free SC70 package for automotive appli-
cations that require visual inspection of PCB solder con-
nections.
Ordering Information
PIN-
TOP
MARK
PART
TEMP RANGE
PACKAGE
Applications
● Remote Keyless Entry (RKE)
● Tire Pressure Monitoring Systems (TPMS)
● Security
-40°C to +125°C
6 SC70
+ADG
+ADG
MAX2634AXT+
MAX2634AXT/V+ -40°C to +125°C
6 SC70
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V Denotes an automotive qualified part.
● Garage Door Openers
● Telemetry Receivers
Pin Configuration
TOP VIEW
+
GND
SHDN
GND
6
5
4
1
2
3
RFOUT
V
MAX2634
CC
RFIN
SC70
Functional Diagram/Typical Operating Circuit appears at
end of data sheet.
Performance Table
SUPPLY
CURRENT
(mA)
FREQUENCY
(MHz)
L1
(nH)
GAIN
(dB)
NOISE FIGURE
(dB)
INPUT P1dB
(dBm)
INPUT IP3
(dBm)
308
315
56
56
33
33
2.5
2.5
2.5
2.5
15.5
15.5
13.5
13.5
1.25
1.25
1.25
1.25
-29
-29
-26
-26
-16
-16
-12
-12
418
433.92
19-4383; Rev 3; 11/15
MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
Absolute Maximum Ratings
V
CC
Pin to GND...................................................-0.3V to +6.0V
Junction-to-Ambient Thermal Resistance (θ
)
JA
RFIN ................Pin Must Be AC-Coupled with DC-Blocking Cap
RFOUT, SHDN ......................................... -0.3V to (V + 0.3V)
(Note 1)......................................................................326°C/W
Operating Temperature Range......................... -40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range............................ -65°C to +160°C
Lead Temperature (soldering, 10s) ...................................300°C
CC
RF Input Power ................................................................+5dBm
Continuous Power Dissipation (T = +70°C)
A
6-Pin SC70 (derate 3.1mW/°C above +70°C).............245mW
Junction-to-Case Thermal Resistance (θ
)
JC
(Note 1)......................................................................115°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
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.
CAUTION! ESD SENSITIVE DEVICE
DC Electrical Characteristics
(V
= +2.2V to +5.5V, T = -40°C to +125°C, Typical values are at V
= +3.0V, T = +25°C, unless otherwise noted. RFIN and
CC A
CC
A
RFOUT are AC-coupled and terminated to 50Ω. No RF input signals at RFIN and RFOUT.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
5.5
4
UNITS
V
Operating Supply Voltage
2.2
SHDN = high, T = +25°C
2.5
mA
mA
µA
A
Operating Supply Current
Shutdown Supply Current
SHDN = high, T = -40°C to +125°C
6
A
V
= 0, T = +25°C
1
SHDN
SHDN
A
V
= 0, T = -40°C to +125°C
10
µA
A
DIGITAL CONTROL INPUTS (SHDN)
Digital Input-Voltage High
1.1
V
V
Digital Input-Voltage Low
0.4
5
Digital Input-Current High
Digital Input-Current Low
SHUTDOWN MODE CONTROL
Enable Time
V
V
= V
= V
µA
µA
SHDN
IH
1
SHDN
IL
130
20
µs
µs
Disable Time
Maxim Integrated
│ 2
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MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
AC Electrical Characteristics
(MAX2634 EV Kit, V
= +2.2V to +5.5V, T = -40°C to +125°C. Typical values are at V
= +3.0V and T = +25°C, unless otherwise
CC
A
CC A
noted. P
= -40dBm, SHDN = high.) (Note 2)
RFIN
PARAMETER
= 315MHz
CONDITIONS
MIN
TYP
MAX
UNITS
f
RFIN
T
T
T
= +25°C
12.5
11.5
15.5
A
A
A
Power Gain
dB
= -40°C to +125°C, V
= +25°C
= +3.0V
CC
Noise Figure
1.25
-16
-29
10
dB
dBm
dBm
dB
Input Third-Order Intercept Point (Note 3)
Input 1dB Compression Point
Input Return Loss
Output Return Loss
8
dB
Reverse Isolation
60
dB
f
= 433.92MHz
RFIN
T
T
T
= +25°C (Note 4)
= -40°C to +125°C, V
= +25°C
11
10
13.5
A
A
A
Power Gain
dB
= +3.0V (Note 4)
CC
Noise Figure
1.25
-12
-26
11
dB
dBm
dBm
dB
Input Third-Order Intercept Point (Note 3)
Input 1dB Compression Point
Input Return Loss
Output Return Loss
8
dB
Reverse Isolation
60
dB
Note 2: Guaranteed by production test at T = +25°C. Guaranteed by design and characterization at T = -40°C and T = +125°C.
A
A
A
Note 3: Measured with two tones located at 315MHz and 316MHz or 433MHz and 434MHz at -40dBm/tone.
Note 4: Guaranteed by design and characterization.
Typical Operating Characteristics
(MAX2634 EV Kit, V
= +2.2V to +5.5V, T = -40°C to +125°C. Typical values are at V = +3.0V and T = +25°C, unless otherwise
CC
A
CC A
noted. f
= 315MHz/433MHz, P
= -40dBm, SHDN = high.)
RFIN
RFIN
S11, S22, S21 vs. FREQUENCY
S11, S22, S21 vs. FREQUENCY
(315MHz)
(433MHz)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
20
15
10
5
20
4.0
3.5
3.0
2.5
2.0
1.5
T
= +125°C
A
A
15
10
S21
S11
S21
5
0
T
= +25°C
S11
0
-5
-5
-10
-15
-20
-10
-15
-20
S22
T
= -40°C
A
S22
200
300
400
500
600
200
300
400
FREQUENCY (MHz)
500
600
2.2
3.3
4.4
5.5
FREQUENCY (MHz)
SUPPLY VOLTAGE (V)
Maxim Integrated
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MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
Typical Operating Characteristics (continued)
(MAX2634 EV Kit, V
= +2.2V to +5.5V, T = -40°C to +125°C. Typical values are at V
= +3.0V and T = +25°C, unless otherwise
A
CC
A
CC
noted. f
= 315MHz/433MHz, P
= -40dBm, SHDN = high.)
RFIN
RFIN
IIP3 vs. SUPPLY VOLTAGE
(315MHz)
IIP3 vs. SUPPLY VOLTAGE
NOISE FIGURE vs. SUPPLY VOLTAGE
(433MHz)
(433MHz)
-10
-12
-14
-16
-18
-20
-5
-8
2.5
T
T
= +125°C
T
T
= +125°C
= +25°C
A
A
A
A
T
= +125°C
A
2.0
1.5
1.0
0.5
0
= +25°C
-11
-14
-17
-20
T
= +25°C
A
T
= -40°C
A
T
= -40°C
4
A
T
= +40°C
4
A
2
3
4
5
6
2
3
5
6
2
3
5
6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
NOISE FIGURE vs. SUPPLY VOLTAGE
(315MHz)
GAIN vs. SUPPLY VOLTAGE
(433MHz)
GAIN vs. SUPPLY VOLTAGE
(315MHz)
2.5
2.0
1.5
1.0
0.5
0
17
16
15
14
13
12
11
17
16
15
14
13
12
11
T
= -40°C
T
= +125°C
A
A
T
= +25°C
A
T
= +25°C
A
T
= -40°C
A
T
= +25°C
A
T
A
= +125°C
T
A
= +125°C
5
T
A
= -40°C
4
2
3
5
6
2
3
4
6
2
3
4
5
6
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TURN-ON TIME
SHUTDOWN TIME
-20
-30
-20
-30
f
P
= 315MHz
= -43dBm
f
P
= 315MHz
RFIN
RFIN
-40
-50
-40
= -43dBm
RFIN
RFIN
-50
-60
-60
1AVG
-70
-70
-80
-80
1AVG
-90
-90
-100
-110
-120
-100
-110
-120
0
20 40 60 80 100 120 140 160 180 200
0
5
10 15 20 25 30 35 40 45 50
TIME (µs)
TIME (µs)
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MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
Pin Description
PIN
1, 3
2
NAME
FUNCTION
GND
Ground. Use minimum path to ground plane to minimize inductance.
SHDN
Shutdown Input. A logic-level high enables the LNA, and a logic-level low disables the LNA.
RF Input. Requires an inductor to match the input for best noise figure and return loss. A DC-blocking
capacitor is required if the RFIN input will see a DC voltage or ground. See the Functional Diagram/
Typical Operating Circuit.
4
RFIN
5
6
V
Supply Voltage. Bypass to ground with a 0.01µF capacitor as close as possible to the pin.
CC
RFOUT
RF Output. Internally matched to 50Ω and incorporates an internal DC-blocking capacitor.
Table 1. Typical Input and Output Impedances in R+jX Format
(V
= +3.0V, T = +25°C.)
A
CC
INPUT IMPEDANCE
OUTPUT IMPEDANCE
FREQUENCY (MHz)
R
X
R
X
100
200
308
315
418
434
500
600
58
-438
-216
-139
-137
-101
-96
92
-94
43
92.1
91.2
91
-50
29
-35.8
-35
29.4
29.2
28.5
26.4
26.7
90.5
89.5
91
-30
-29.3
-28.2
-27.3
-83
-69
87.5
Input Matching
Detailed Description
The MAX2634 requires an off-chip input matching net-
work. The Functional Diagram/Typical Operating Circuit
shows the recommended input-matching network com-
ponent values for operation at 315MHz and 433MHz.
These values are optimized for the best simultaneous
gain, noise figure, and return loss performance. Table 1
lists typical input and output impedances.
The MAX2634 LNA with low-power shutdown mode is
optimized for 308MHz, 315MHz, 418MHz, and 433MHz
automotive RKE applications, which are required to
operate over the -40°C to +125°C automotive tempera-
ture range. The device reduces component count by
integrating the output matching and DC-blocking com-
ponents, and only requires a single inductor to match
the input for best noise figure and input return loss. An
integrated logic-controlled low-power shutdown mode
reduces power consumption to 0.1µA and replaces the
two transistors typically required to implement the shut-
down function in discrete-based RKE LNA solutions.
Maxim Integrated
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MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
RF Input Coupling Capacitor
Table 2. MAX2634 Typical Noise
Parameters
Input IP3 vs. Enable Time
The value of the coupling capacitor affects input IP3 and
turn-on time. A larger coupling capacitor results in higher
input IP3 at the expense of longer turn-on time. See Table
3 for the typical amount of trade-off.
(V
= +3.0V, T = +25°C.)
A
CC
|G
|
FREQUENCY
(MHz)
FMIN
(dB)
OPT
|G
|
R (Ω)
N
OPT
ANGLE
308
315
418
434
0.64
0.65
0.78
0.80
0.50
0.49
0.44
0.44
27.0
9.78
9.78
9.87
9.88
Integrated Output Matching
27.7
Network and DC-Block
37.4
The MAX2634 integrates the output matching network
and DC-block, eliminating the need for external matching
components while providing a broadband match. See the
Functional Diagram/Typical Operating Circuit for compo-
nent values.
38.9
Table 3. RF Input Coupling Capacitor
Input IP3 vs. Enable Time
Shutdown
The MAX2634 features a shutdown pin to disable the
entire chip. Apply a logic-high to the SHDN pin to place
the part in the active mode, and a logic-low to place the
part in the shutdown mode.
INPUT DC-BLOCKING
CAPACITOR,
C1 (
ENABLE
TIME
INPUT IP3 AT
315MHz
(µs)
(dBm)
1
6
-19
-14
-12
-11
-11
3.3
20
Power-Supply Bypassing
22
130
600
6000
Bypassing the V
line is necessary for optimum gain/
CC
linearity performance. See the Functional Diagram/Typical
Operating Circuit for bypassing capacitor values.
100
1000
Layout Information
A properly designed PCB is essential to any RF/
microwave circuit. Use controlled-impedance lines on all
high-frequency inputs and outputs. Bypass with decou-
Chip Information
PROCESS: SiGe BiCMOS
pling capacitors located close to the device’s V
pin.
CC
For long V
lines, it may be necessary to add additional
CC
decoupling capacitors. These additional capacitors can
be located farther away from the device package. Proper
grounding of the GND pins is essential. If the PCB 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 plated through-hole located close to the
package.
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MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
Functional Diagram/Typical Operating Circuit
+
MAX2634
GND
RFOUT
1
2
6
5
RF
OUTPUT
V
CC
V
SHDN
CC
LOGIC
CONTROL
C3
100pF
C2
0.01F
C1**
22nF
BIAS
L1*
GND
RFIN
4
RF
INTPUT
3
*L1 = 56nH FOR 308MHz/315MHz.
*L1 = 33nH FOR 418MHz/433.92MHz.
**C1 = DC-BLOCK. OPTIONAL IF DC IS NOT APPLIED TO RFIN.
Package Information
For the latest package outline information and land patterns (footprints), 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.
LAND
PATTERN NO.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
21-0077
6 SC70
X6SN+1
90-0189
Maxim Integrated
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MAX2634
315MHz/433MHz Low-Noise
Amplifier for Automotive RKE
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
DESCRIPTION
0
10/08
Initial release
—
Updated the Features, Performance Table, Electrical Characteristics, and
Typical Operating Characteristics sections.
1
3/09
1, 3, 4
2
3
2/14
Added automotive grade package to Ordering Information
Updated package code in Package Information section
1
7
11/15
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2015 Maxim Integrated Products, Inc.
│ 8
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