MGA-87563-BLKG Avago Technologies US Inc., MGA-87563-BLKG Datasheet - Page 6

• Manufacturer Part Number: MGA-87563-BLKG
• Description: AMP RFIC LNA GAAS 3V LC SOT-363
• Manufacturer: Avago Technologies US Inc.
• Type: General Purpose Amplifierr
• Series: -r

Specifications of MGA-87563-BLKG

• P1db: 1.6dBm
• Noise Figure: 1.6dB
• Package / Case: SC-70-6, SC-88, SOT-363
• Current - Supply: 4.5mA
• Frequency: 500MHz ~ 4GHz
• Gain: 14dB
• Rf Type: ISM, PCS, GPS
• Test Frequency: 2.4GHz
• Voltage - Supply: 3V, 5V
• Mounting Style: SMD/SMT
• Technology: Low Noise Amplifier
• Number Of Channels: 1
• Operating Frequency: 4000 MHz
• Operating Supply Voltage: 3 V or 5 V
• Supply Current: 4.5 mA (Typ) @ 3 V
• Frequency (max): 4GHz
• Operating Supply Voltage (typ): 3/5V
• Package Type: SOT-363
• Mounting: Surface Mount
• Pin Count: 6
• Noise Figure (typ): 2@4000MHzdB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Output Matching
The output of the MGA-87563 is matched internally to 50
Ω above 1.8 GHz. The use of a conjugate matching circuit,
such as a simple series inductor, can increase the gain
considerably at lower frequencies. Matching the output
will not affect the noise figure.
Stability
If the MGA-87563 is cascaded with highly reactive stages
(such as filters) some precautions may be needed to en-
sure stability. The low frequency stability (under 1.5 GHz)
of the MGA-87563 can be enhanced by adding a series
R-L network in shunt with the output, as shown in Figure
12. The inductor can be either a chip component or a
high impedance transmission line as shown in the figure.
Compo nent values are selected such that the output of the
MGA-87563 will be resistively loaded at low frequen cies
while allowing high frequency signals to pass the stability
load with minimal loss.
Figure 12. Output Circuitry for Low Frequency Stability.
Typical values for the resistor are in the 25 to 50Ω range.
A suggested starting place for the inductor is a 0.35 to
0.40-inch long microstripline with a width of 0.020 inches,
using 0.031-inch thick FR-4 (H
substrate.
For applications near 1.5 GHz, gain (and output power)
may be traded off for increased stability.
Some precautions regarding the V
MGA-87563 are also recommended to ensure stability
within the operating frequency range of the device. It is
important that the connection to the power supply be
properly bypassed to realize full amplifier performance.
Refer to the Biasing section above for more information.
6
MGA
87563
25-50 Ω
HIGH IMPEDANCE
TRANSMISSION
OR INDUCTOR
DC BLOCKING
CAPACITOR
OUTPUT
RF
r
= 4.8) circuit board as the
dd
connection of the
SOT-363 PCB Layout
A PCB pad layout for the minia ture SOT-363 (SC-70) pack-
age is shown in Figure 13 (dimensions are in inches). This
layout pro vides ample allowance for package place ment by
automated assem bly equipment without adding para sitics
that could impair the high frequency RF performance of
the MGA-87563. The layout is shown with a nominal SOT-
363 package footprint superimposed on the PCB pads.
Figure 13. Recommended PCB Pad Layout for Avago’s SC70 6L/SOT-363
Products.
RF Layout
The RF layout in Figure 14 is suggested as a starting point
for designs using the MGA-87563 amplifier. Adequate
grounding is needed to obtain maximum per formance
and to obviate potential instability. All three ground pins
of the MMIC should be connected to RF ground by using
plated through holes (vias) near the package terminals.
Figure 14. RF Layout.

RF OUTPUT
50 Ω

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87
V
RF INPUT

DD
50 Ω