mga-31189 Avago Technologies, mga-31189 Datasheet - Page 11

• Manufacturer Part Number: mga-31189
• Description: 70 To 500 Mhz Ampliier For If Applications Using The Avago Technologies Mga-31189 Ampliier
• Manufacturer: Avago Technologies

Performance of the MGA-31189 at 240MHz
With a +5 V supply, the MGA-31189’s small signal gain was
measured to be 21.1 dB, as shown in Figure 21. IRL was
-15.4 dB and ORL was -12.1 dB as shown in Figure 20. The
MGA-31189 delivered a noise figure of 2.6 dB at 240 MHz.
Figure 22 shows the MGA-31189’s reverse isolation to be
about -28 dB at 240 MHz. The nominal OIP3 was measured
to be 40.8 dBm, and OP1dB was observed to be 23.4 dBm
at 240 MHz. Table 9 shows the MGA-31189 performance
at 240 MHz.
Figure 20. Input and output return loss
Figure 22. Reverse isolation
11
-10
-12
-14
-16
-18
-20
-22
-24
-25
-26
-27
-28
-29
-30
-31
-32
-8
215
215
220 225 230 235 240 245 250 255 260
220 225 230 235 240 245 250 255 260
Frequency (MHz)
Frequency (MHz)
RED = Input Return Loss
BLUE = Output Return Loss
265
265
Table 9. MGA-31189 performance summary at 240 MHz
Figure 21. Small signal gain
Parameter
Frequency
Input Return Loss (IRL)
Small Signal Gain (SSGain)
Reverse Isolation (ISO)
Output Return Loss (ORL)
Noise Figure (NF)
Third-Order Intercept Point (OIP3)
1 dB Gain Compression Point (OP1dB) 23.4
22.0
21.5
21.0
20.5
20.0
19.5
215
220 225 230 235 240 245 250 255 260
Frequency (MHz)
Performance
240
-15.4
21.1
-28.0
-12.1
2.6
40.8
Unit
MHz
dB
dB
dB
dB
dB
dBm
dBm
265