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RF2311
4
Typical Applications
* General Purpose High Bandwidth Gain Blocks * IF or RF Buffer Amplifiers * Broadband Test Equipment * Final PA for Medium Power Applications * Driver Stage for Power Amplifiers
GENERAL PURPOSE AMPLIFIER
Product Description
The RF2311 is a general purpose, low cost low power RF amplifier IC. The device is manufactured on an advanced Gallium Arsenide Heterojunction Bipolar Transistor (HBT) process, and has been designed for use as an easily cascadable 50 gain block. Applications include IF and RF amplification in wireless voice and data communication products operating in frequency bands up to 1600MHz. The gain flatness and high bandwidth make the device suitable for many other applications as well. The device is self-contained with 50 input and output impedances, and no external DC biasing elements are required to operate as specified.
4
.156 .152 .017 1 .195 .191 .050 .240 .232 .056 .052 .004 MIN
5
.022 .018
.008
Optimum Technology Matching(R) Applied
Si BJT Si Bi-CMOS
u
Package Style: SOP-8
GaAs HBT SiGe HBT
GaAs MESFET Si CMOS
Features
* DC to well over 1600MHz Operation * Internally Matched Input and Output * 14dB Small Signal Gain * 4.2dB Noise Figure * +9dBm Output Power * Single 2.7V to 6V Positive Power Supply
VCC 1 GND 2 GND 3 RF IN 4
8 RF OUT 7 GND 6 GND 5 GND
Ordering Information
RF2311 RF2311 PCBA General Purpose Amplifier Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA
Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Rev C3 010228
4-81
GENERAL PURPOSE AMPLIFIERS
RF2311
Absolute Maximum Ratings Parameter
Supply Voltage Input RF Power Operating Ambient Temperature Storage Temperature
Rating
-0.5 to +6 +10 -40 to +85 -40 to +150
Unit
VDC dBm C C Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. However, RF Micro Devices reserves the right to make changes to its products without notice. RF Micro Devices does not assume responsibility for the use of the described product(s).
Parameter
Specification Min. Typ. Max.
DC to 1600 14 13 4.2 4.0 <1.5:1 <1.3:1 +16 +8 +9 +1 20 2.7 to 6 17 8
Unit
MHz dB dB dB dB
Condition
T=25 C, VCC =5V, Freq=900MHz 3dB Bandwidth VCC =5V VCC =3.6V VCC =5V VCC =3.6V 300MHz to 1200MHz 900MHz, VCC =5V 900MHz, VCC =3.6V 900MHz, VCC =5V 900MHz, VCC =3.6V
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GENERAL PURPOSE AMPLIFIERS
Overall
Frequency Range Gain Noise Figure Input VSWR Output VSWR Output IP3 Saturated Output Power Reverse Isolation 12 16
+14 +8
dBm dBm dBm dBm dB V mA mA
Power Supply
Operating Voltage Operating Current Range 12 21 11 VCC =5V VCC =3.6V
4-82
Rev C3 010228
RF2311
Pin 1 2 3 4 Function VCC GND GND RF IN Description
Power supply pin. An external bypass capacitor is recommended. The total supply current is shared between this pin and pin 8 (through the inductor). Ground connection. Keep traces physically short and connect immediately to ground plane for best performance. Same as pin 2.
Interface Schematic
See pin 8.
Same as pin 2. RF output pin. Because DC is present on this pin, a DC blocking capacitor, suitable for the frequency of operation, should be used in most applications. The DC voltage on this pin is typically 2.4V. Alternatively, power supply may be connected to this pin. A series resistor and inductor should be used, in which case the L should be large enough to present a high impedance at the lowest operating frequency, and the R should be (VCC - 2.4) / I, where I is the desired device current (between 8mA and 20mA).
VCC
RF OUT RF IN
Rev C3 010228
4-83
GENERAL PURPOSE AMPLIFIERS
5 6 7 8
GND GND GND RF OUT
RF input pin. This pin is NOT internally DC blocked. A DC blocking See pin 8. capacitor, suitable for the frequency of operation, should be used in most applications. DC coupling of the input is not allowed, because this will override the internal feedback loop and cause temperature instability. Same as pin 2. Same as pin 2.
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RF2311
Application Schematic 5V Supply Voltage
VCC = 5V
100 nF
22 pF 22 pF 1 2 3 8 7 6 5 RF OUT
4
GENERAL PURPOSE AMPLIFIERS
22 pF RF IN
4
Application Schematic 2.7V Supply Voltage
VCC= 2.7 V
15 - 39
100 nH 22 pF 1 2 3 22 pF RF IN 4 5 8 7 6 RF OUT
4-84
Rev C3 010228
RF2311
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
P1 H3M P1-1 1 2 NC 3 C4 1 nF C2 1 F C3 1 nF 1 2 3 SMA J1 IN 50 strip 4 C1 330 pF 5 8 7 6 VCC GND
P1-1 VCC
50 strip
OUT
SMA J2
4
GENERAL PURPOSE AMPLIFIERS
Drawing 2311400 Rev B
Rev C3 010228
4-85
RF2311
Evaluation Board Layout 2" x 2"
4
GENERAL PURPOSE AMPLIFIERS
4-86
Rev C3 010228

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