Transcript
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.
• • • • • • • •
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.
• • • • • •
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
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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.
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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)
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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)
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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)
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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
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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
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