IAM-91563-TR1G Avago Technologies US Inc., IAM-91563-TR1G Datasheet - Page 10

• Manufacturer Part Number: IAM-91563-TR1G
• Description: MIXER RFIC GAAS 3V SOT-363
• Manufacturer: Avago Technologies US Inc.
• Series: IAM-91563r

Specifications of IAM-91563-TR1G

• Rf Type: Cellular, ISM, PCS, PHS, WLL
• Frequency: 800MHz ~ 6GHz
• Number Of Mixers: 1
• Gain: 7.7dB
• Noise Figure: 11dB
• Secondary Attributes: Down Converter
• Current - Supply: 12mA
• Voltage - Supply: 3V
• Package / Case: 6-TSSOP, SC-88, SOT-363
• Frequency Range: 0.8GHz To 6GHz
• Supply Voltage Range: 3V
• Rf Ic Case Style: SOT-363
• No. Of Pins: 6
• Peak Reflow Compatible (260 C): Yes
• Frequency Max: 6GHz
• Noise Figure Typ: 8.5dB
• Termination Type: SMD
• Rohs Compliant: Yes
• Operating Supply Voltage: 3V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Application Example
The printed circuit layout in Figure 8 is a general purpose
layout that will accommodate components for using the
IAM-9563 for RF inputs from 800 MHz to 6 GHz. This lay-
out is a microstripline design (solid groundplane on the
backside of the circuit board) with 50 Ω interfaces for the
RF input, IF output, and LO input. The circuit is fabricated
on 0.03-inch thick FR-4 dielectric material. Plated through
holes (vias) are used to bring the ground to the top side of
the circuit where needed. Multiple vias are used to reduce
the inductance of the paths to ground.
Figure 28. PCB Layout.
1.9 GHz Design Example
To illustrate a design approach for using the IAM-9563, a
PCS band downconverter with an RF of .9 GHz and IF of
0 MHz is presented. The PCB layout above was used to
assemble the mixer and verify performance.
A schematic diagram of the .9 GHz circuit is shown in Fig-
ure 9.
Input
Figure 29. Schematic of Example Application Circuit.
At the RF input port, series capacitor C and transmission
line MLIN form the input matching network and high pass
filter. (Note: The PCB layout above has provision for an in-
ductor, L, in series with MLIN. Inductor L is not used in
this design.)
Referring to the table of Reflection Coefficients, the RF
input port Γ
ted as Point A on the Smith chart in Figure 30. For reasons
previously discussed in the “RF Port” section above, a se-
0
RF
RF
IAM-91
L1 = 0
MLIN
C1
LO
C3
RF
91
= 0.8 ∠−37° at .9 GHz. This point is plot-
Input
C7
L3
LO
L2
C2
C5
RFC
C4
C6
Output
V
IF
d
+V
IF
ries C - shunt L network (from the 50 Ω source to Γ
be used to match Γ
inductance moves the impedance trajectory from Point A
to Point B. The match to 50 Ω is completed with a 0.6 pF
series capacitance, C, that moves the match to Point C,
the center of the Smith chart.
-0.2
Figure 30. RF Input Impedance Match.
For this example, the shunt inductor was realized with the
transmission line, MLIN in Figure 9 (Z
0.35 in.). A high quality capacitor should be selected for
C to minimize the effects of the capacitor’s parasitic in-
ductance and resistance. Series capacitor C also serves
to block any DC that may be present at the output of the
stage preceding the mixer.
At the IF output, the low pass filter and impedance match is
formed by shunt capacitor C and series inductor L. Refer-
ring again to the table of Reflection Coefficients, the IF out-
put port Γ
point closest to the desired IF of 0 MHz. Γ
Point A in Figure 3.
-0.2
Figure 31. IF Input Impedance Match.
0.2
0.2
0.2
0.2
-0.5
-0.5
0.5
0.5
Input
C
RF
IF
0.5
0.5
C1
= 0.64 ∠ -8° at 00 MHz, which is the frequency
B
C2
L
A
A
C
C
1
1
-1
-1
1
1
B
L2
RF
Output
to 50 Ω. Addition of a 6.5 nH shunt
C
IF
2
2
B
A
B
2
-2
2
-2
A
O
= 90Ω, length =
IF
is plotted as
RF
) will