ISL55016_14 Datasheet, PDF (8/11 Pages) Intersil Corporation – MMIC Silicon Bipolar Differential Amplifier

ISL55016
Typical Performance (V) 50Ω Environment, Z_RSC = 50Ω, Z_LOAD Port 2 = 50Ω, Z_LOAD Port 3 = 50Ω, Measured on Evaluation Board. (Continued)
18
16
0Ω
14
12
27Ω
10
8
6
4
2
0
0
500M
1G
1.5G
2.0G
FREQUENCY (Hz)
FIGURE 25. DIFFERENTIAL P1dB vs FREQUENCY
70
60
0Ω
50
27Ω
40
30
20
10
0
0
500M
1G
1.5G
2.0G
FREQUENCY (Hz)
FIGURE 26. DIFFERENTIAL OIP2 vs FREQUENCY
12
10
8
6
4
2
0
0
500M 1G
1.5G 2.0G 2.5G 3.0G
FREQUENCY (Hz)
FIGURE 27. NOISE FIGURE vs FREQUENCY
Applications Information
Product Description
The ISL55016 Silicon Bipolar amplifier can match a 75Ω
single-ended source to a 100Ω differential load. This feature
makes the ISL55016 ideal for a wide range of general
purpose applications, such as Satellite TV.
Typical Application Circuit
ISL55016 is a true differential amplifier. Figure 29 shows the
Typical Application Circuit of ISL55016. Pins 2 and 3 are
equivalent.
The ISL55016 can configured so that it is driven with a
single-ended input. If either pin 2 or pin 3 is used as a
single-ended input, the other needs to be connected to an
AC ground. The input is internally matched to 75Ω
single-ended and the output is matched to 50Ω single-ended
or 100Ω differential.
35
30
0Ω
25
20
27Ω
15
10
5
0
0
500M
1G
1.5G
2.0G
FREQUENCY (Hz)
FIGURE 28. DIFFERENTIAL OIP3 vs FREQUENCY
The ISL55016 can be used as differential-in and differential-
out as well since pin 2 and pin 3 are equivalent, balanced
inputs.
+5V
C6
RF IN 1
C1
RF IN 2
C2
C3
1
6
ISL55016
2
5
3
4
R2
R1 _L2
RF Out 2
C5
L1
RF Out 1
C4
FIGURE 29. APPLICATION CIRCUIT
Balun Function
In many applications of ISL55012, the amplifier will be
followed with a Balun structure to transfer the single-ended
signal to a differential tuner. The ISL55016 will eliminate the
need for an external balun structure and provide significant
savings in BOM cost and PCB real-estate (see Figure 30).
8
FN6526.1
June 24, 2008