micrf300

MICRF300
100MHz to 1000MHz, 1.8 to 3.6V,
Low-Noise Amplifier with Shutdown
General Description
Features
The MICRF300 is a low-noise amplifier (LNA) with lowpower shutdown mode, which operates over the
100MHz to 1000MHz frequency band. The device is
targeted for low-power, low-data rate applications at
315/433MHz, achieving a low 1.2dB noise figure with
18dB of gain, helping to improve receiver noise figure
and sensitivity. The device also performs well at
868/915MHz, achieving 13dB of gain and a noise figure
of 1.7dB. The device requires a simple input matching
network and output matching network to optimize
performance for the desired frequency band.
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•
•
•
•
•
•
•
The MICRF300 operates over the 1.8V to 3.6V voltage
range. Consuming a low 2.5mA of supply current during
operation and a typical 50nA of shutdown current, the
MICRF300 is an ideal solution for battery powered
equipment. The device is available in 6-pin SC70
package and is rated to operate over the -40˚C to
+125˚C temperature range.
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•
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1.8V to 3.6V supply voltage range
2.5mA operating supply current
1μA (Max) shutdown current over temperature
18.3dB gain at 315MHz/433.92MHz
1.15dB noise figure at 315MHz/433.92MHz
-25dBm input P1dB compression point at 433.92MHz
-40˚C to +125˚C operating temperature range
Small 6-pin SC70 package
Applications
Security systems
Remote keyless entry (RKE)
Tire pressure monitoring (TPMS)
Automated meter reading (AMR)
Garage door openers (GDO)
Remote weatherstations
Typical Application Circuit
Typical Performance and Matching Component Values
fRF
(MHz)
315
433.92
900
ICC
(mA)
2.5
2.5
2.5
Gain
(dB)
18.5
18.3
13.6
NF
(dB)
1.15
1.15
1.7
IP1dB
(dBm)
-26.5
-25
-21
IIP3
(dBm)
-15
-13
-10
L1
(nH)
33
22
2.7
C1
(pF)
1000
1000
270
L2
(nH)
47
33
10
C2
(pF)
5.6
3.9
1.8
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2012
M9999-041712-B
[email protected] or (408) 944-0800
Micrel, Inc.
MICRF300
Ordering Information
Part Number
MICRF300YC6
Temp. Range
Package
Top Mark
–40°C to +125°C
SC70-6
XE1
Notes:
1. Under bar symbol (_) may not be to scale.
Pin Configuration
SC70-6 (C6)
Pin Description
Pin
Number
Pin
Name
1
EN
2, 4
GND
Ground. Connect to PCB ground plane.
3
RFIN
RF Input. DC blocking and matching network is required.
5
RFOUT
6
VCC
April 2012
Pin Function
Enable Logic Input. Logic high enables the part. Logic low disables the part.
RF Output. Connect a pull-up inductor to the supply and a matching network to the load.
Supply Voltage. Connect a 0.1μF bypass capacitor as close to the pin as possible.
2
M9999-041712-B
Micrel, Inc.
MICRF300
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VCC)..................................-0.3V to +3.9V
EN Voltage (VEN). ............................. −0.3V to VCC + 0.3V
Maximum Junction Temperature (TJ)....................+150ºC
Storage Temperature (TS)......................−65ºC to +150°C
Lead Temperature (soldering, 10sec.)..................+260°C
Maximum Input Power .................. +10dBm (50Ω source)
ESD Rating (3)
HBM ...................................................................1.5kV
MM ..................................................................... 100V
Supply Voltage (VCC) ............................. +1.8V to +3.6V
EN Voltage (VEN) ............................................ 0V to VCC
Ambient Temperature (TA).................. –40°C to +125°C
RFIN DC voltage .........................................AC coupled
Frequency Range ........................ 100MHz to 1000MHz
Thermal Resistance (θJA) ................................ 260˚C/W
ELECTRICAL CHARACTERISTICS TABLE(4)
VCC = +2.7V, TA = +25°C, bold values indicate –40°C≤ TA ≤ +125°C, unless noted.
Parameter
Condition
Min
Shutdown Current (ISHDN)
VEN = 0V, TA = +25ºC
Typ
Max
0.05
0.5
VEN = 0V
Operating Supply Current (ICC)
1
VEN = VCC
2.5
EN Logic-Low (VIL)
EN Logic-High (VIH)
EN Input Current
Gain
Noise Figure (NF)
rd
Input 3 Order Intercept Point (IIP3)
(Note 5)
Input 1dB compression (P1dB)
μA
4
mA
0.2
V
V
1.2
VEN = 0.2V
20
VEN = 2.2V
28
fRF = 315MHz
Units
nA
40
μA
18.5
fRF = 433.92MHz
14
18.3
fRF = 900MHz
10
13.6
fRF = 315MHz
1.15
fRF = 433.92MHz
1.15
fRF = 900MHz
1.7
fRF = 315MHz
–15
fRF = 433.92MHz
–13
fRF = 900MHz
–10
fRF = 315MHz
–27
fRF = 433.92MHz
–25
fRF = 900MHz
–21
dB
dB
dBm
dBm
Enable Time
fRF = 315MHz; 433.92MHz
10
μs
Disable Time
fRF = 315MHz; 433.92MHz
10
μs
Notes:
1.
Exceeding the absolute maximum rating may damage the device.
2.
The device is not guaranteed to function outside its operating rating.
3.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4.
5.
Specification for packaged product only.
IIP3 is measured with two tones located at 433MHz and 433.92MHz or 899MHz and 900MHz with -40dBm/tone.
April 2012
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M9999-041712-B
Micrel, Inc.
MICRF300
Typical Characteristics
Supply Current
vs Enable Voltage
Supply Current vs Supply
Voltage
4.0
60
+125ºC
3.5
3.5
SUPPLY CURRENT (mA)
+85ºC
3.0
+25ºC
2.5
-40ºC
2.0
55
+85ºC
3.0
+25ºC
2.5
2.0
1.5
-40ºC
1.0
0.5
1.5
1.8
2.4
3
3.6
40
35
30
20
10
5
0.5
1.0
1.5
2.0
2.5
0.0
3.0
INPUT P1dB (dBm)
-14
+85ºC
-16
+25ºC
-18
2.4
2.7
3.0
-26
-27
+25ºC
+125ºC
18.0
17.5
-40ºC
17.0
16.5
16.0
15.5
-40ºC
3.3
3.6
1.8
SUPPLY VOLTAGE (V)
2.1
2.4
2.7
3.0
3.3
15.0
1.8
3.6
Input P1dB vs Supply Voltage
fRF = 433.92MHz
-9
+125ºC
+25ºC
-15
-16
-24
-25
+25ºC
-26
-28
2.7
3.0
SUPPLY VOLTAGE (V)
April 2012
3.3
3.6
17.5
-40ºC
17.0
15.5
-40ºC
-40ºC
2.4
18.0
16.0
-17
2.1
+125ºC
16.5
-27
-18
3.6
18.5
+85ºC
GAIN (dB)
INPUT P1dB (dBm)
-14
3.3
+25ºC
19.0
+85ºC
3.0
19.5
-23
-11
-13
2.7
20.0
+125ºC
-12
2.4
Gain vs Supply Voltage
fRF = 433.92MHz
-22
-10
2.1
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
IIP3 vs Supply Voltage
fRF = 433.92MHz
1.8
3.6
18.5
+85ºC
-29
2.1
3.0
+25ºC
19.0
-40ºC
-20
1.8
2.4
19.5
-28
-19
1.8
20.0
+125ºC
-13
1.2
Gain vs Supply Voltage
fRF = 315MHz
-25
-17
0.6
ENABLE VOLTAGE (V)
-24
+125ºC
-15
+25ºC
Input P1dB vs Supply Voltage
fRF = 315MHz
-12
-40ºC
+85ºC
15
ENABLE VOLTAGE (V)
-10
-11
+125ºC
25
0
0.0
IIP3 vs Supply Voltage
fRF = 315MHz
INPUT IP3 (dBm)
45
VCC = 2.7V
SUPPLY VOLTAGE (V)
INPUT IP3 (dBm)
50
0.0
GAIN (dB)
SUPPLY CURRENT (mA)
+125ºC
ENABLE CURRENT (μ A)
4.0
Enable Input Current
vs Enable Voltage
1.8
2.1
2.4
2.7
3.0
SUPPLY VOLTAGE (V)
4
3.3
3.6
15.0
1.8
2.1
2.4
2.7
3.0
3.3
3.6
SUPPLY VOLTAGE (V)
M9999-041712-B
Micrel, Inc.
MICRF300
Typical Characteristics (Continued)
16.0
-18
-7.0
15.5
+125ºC
+125ºC
-7.5
15.0
-19
-8.5
-9.0
+85ºC
-9.5
-10.0
-10.5
+25ºC
-11.0
-40ºC
14.5
+85ºC
-21
-22
+25ºC
2.7
3.0
3.3
3.6
1.8
2.1
SUPPLY VOLTAGE (V)
1
2
3
4
5
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
6
S11
0
15
S21
10
S-PARAMETERS (dB)
S-PARAMETERS (dB)
20
5
0
-5
-10
-15
S11
200
250
300
350
1
2
FREQUENCY (MHz)
April 2012
3
5
450
500
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
6
3.0
3.3
3.6
S21
S11
S22
S12
0
1
2
3
4
5
6
FREQUENCY (GHz)
S-Parameters vs Frequency
fRF = 900MHz (matched)
15
S21
10
5
0
-5
-10
-15
S22
-25
200
2.7
S-Parameters vs Frequency
fRF = 900MHz (matched)
S22
4
2.4
20
S11
-20
400
2.1
SUPPLY VOLTAGE (V)
S-Parameters vs Frequency
fRF = 433.92MHz (matched)
15
150
1.8
3.6
FREQUENCY (GHz)
20
-25
100
3.3
S21
S-Parameters vs Frequency
fRF = 315MHz (matched)
S22
3.0
S21
FREQUENCY (GHz)
-20
2.7
S-PARAMETERS (dB)
S-PARAMETERS (dB)
S-PARAMETERS (dB)
S22
S12
0
2.4
S-Parameters vs Frequency
fRF = 433MHz (matched)
S21
S11
-40ºC
SUPPLY VOLTAGE (V)
S-Parameters vs Frequency
fRF = 315MHz (matched)
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
-60
12.0
10.0
S-PARAMETERS (dB)
2.4
12.5
10.5
-24
2.1
13.0
11.0
-11.5
1.8
13.5
11.5
-40ºC
-23
-12.0
+25ºC
+125ºC
14.0
-20
GAIN (dB)
INPUT P1dB (dBm)
-8.0
INPUT IP3 (dBm)
Gain vs Supply Voltage
fRF = 900MHz
Input P1dB vs Supply Voltage
fRF = 900MHz
IIP3 vs Supply Voltage
fRF = 900MHz
250
300
350
400
450
S21
5
0
-5
-10
-15
-20
500
FREQUENCY (MHz)
5
10
550
600
-25
700
S11
S22
750
800
850
900
950 1000 1050 1100
FREQUENCY (MHz)
M9999-041712-B
Micrel, Inc.
MICRF300
Typical Characteristics (Continued)
Noise Figure Distribution
fRF = 433.92MHz
14
# OF BOARDS
12
10
8
6
4
2
0
05
1.
to
1
1.
1
1.
to
15
1.
15
1.
to
2
1.
2
1.
to
25
1.
25
1.
to
3
1.
NOISE FIGURE (dB)
April 2012
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M9999-041712-B
Micrel, Inc.
MICRF300
Functional Description
Output Bias and Matching
The MICRF300 is a low-noise amplifier (LNA) which
operates over the 100 to 1000MHz frequency range. The
device operates from a 1.8V to 3.6V voltage supply, where
it consumes 2.5mA of supply current during operation, and
1μA (max) of current in shutdown. A simple LC input
matching network is required to optimize the device for
best noise figure. A simple LC network is required to bias
the output stage and match the output to the following
stage. Recommended matching networks have been
provided for 315MHz, 433.92MHz and 900MHz. See
Evaluation Board and Bill of Materials for recommended
component values. See Figure 1 for Block Diagram of the
MICRF300.
The output stage has an internal pull-up resistor of 250Ω.
To resonate out any parasitic capacitance and to increase
output swing capability, a multi-layer ceramic inductor
should be connected from the RF output, RFOUT (Pin 5)
pin to VCC. See recommended component values in the
Typical Performance and Matching Component Values
table of the data sheet.
Input Matching
The RF input pin, RFIN (Pin 3) is directly connected to the
base of the RF input device. In normal operation, the DC
voltage of this pin is one diode above GND.
The
MICRF300 requires an input matching network for optimal
noise figure, gain and linearity. A series inductor and a DCblocking capacitor are required to implement this network.
A high-Q, wire-wound type inductor is recommended for
lowest noise figure at 315MHz and 433.92MHz.
A
standard multi-layer ceramic inductor can be used, but the
noise figure degrades by 0.2 dB. At 900MHz, a standard
multi-layer ceramic inductor may be used as the
inductance value is very low, and the Q does not make a
measurable difference. See recommended component
values in the Typical Performace and Matching Component
Values section of the data sheet.
Enable
The MICRF300 features a logic-level enable, EN (Pin 1). A
logic-level low disables the device. A logic-level High
enables the device. The value of the input DC-blocking
capacitor will affect the enable and disable time of the
device.
Power Supply Bypassing
Minimum supply bypassing is needed on PCB board to
filter out AC fluctuations in supply voltage. It is achieved by
placing a 0.1μF capacitor as close as possible between the
VCC (Pin 6) and GND (Pins 2 and 4). Refer to the
MICRF300 Evaluation Board for recommend layout.
Functional Diagram
Figure 1: Block Diagram
April 2012
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M9999-041712-B
Micrel, Inc.
MICRF300
Package Information
SC70-6 (C6)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2012 Micrel, Incorporated.
April 2012
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M9999-041712-B