HFA3421 Просмотр технического описания (PDF) - Intersil
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HFA3421 Datasheet PDF : 3 Pages
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HFA3421
Typical Performance Curves (Continued)
3.0
INPUT
2.5
TA = 25oC
5V, 8mA
OUTPUT
2.0
1.5
1.0
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
FREQUENCY (GHz)
FIGURE 3. VSWR vs FREQUENCY
2
0
5V, 20mA
-2
5V, 8mA
-4
3V, 8mA
-6
TA = 25oC
-8
1.70
1.75
1.80
1.85
1.90
1.95
2.00
FREQUENCY (GHz)
FIGURE 4. INPUT IP3 vs FREQUENCY
24
TA = 25oC
22
-40oC
25oC
20
2.4
85oC
2.1
1.8
5V, 8mA
25oC
18
85oC
16
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
FREQUENCY (GHz)
FIGURE 5. GAIN vs FREQUENCY
Typical Application Circuit
VBIAS (PIN 2)
NORMAL BIAS
EXTENDED BIAS
Open
30Ω to 35Ω to Ground
1.5
-40oC
1.2
1.70
1.75
1.80
1.85
1.90
1.95
2.00
FREQUENCY (GHz)
FIGURE 6. NOISE FIGURE vs FREQUENCY
500pF
15nH
+VDD
RF SIGNAL OUTPUT
2.4GHz
PIN 2 ALLOWS FOR AN EXTERNAL RESISTOR
RBB TO BE USED TO GROUND FOR AN OPTIONAL
20mA CURRENT OPERATION. RECOMMENDED
VALUES FOR THE CHIP RESISTOR ARE 30Ω TO 35Ω.
RBB
RF SIGNAL INPUT
2.4GHz
FIGURE 7. REFERENCE APPLICATION/TEST DESIGN SETUP SCHEMATIC: LOW NOISE AMPLIFIER
2-3
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