ACA2601 Datasheet, PDF (7/20 Pages) ANADIGICS, Inc – Fiber-to-the-Home RF Amplifier

All performance data measured using application circuit with input photodiode, as shown in Figure 16.
ACA2601
Figure 6: Gain Flatness To Best Fit Line over Temperature
(VCC = + 5 V, VAGC = +3.0 V)
2
1.5
1
Temperature
0.5
+115C
+100C
+60C
0
+40C
+15C
-5C
-0.5
-25C
-35C
-1
-1.5
-2
0
100
200
300
400
500
600
700
800
900
1000
Frequency (MHz)
Table 5: Gain Flatness to Best Fit Line
(VAGC = +3.0 V)
Temp (^oC)
Tilt (dB)
Flatness (dB)
115
3.5
2
100
3.8
1.8
60
4.4
1.5
40
4.7
1.4
15
5
1.3
-5
5.2
1.2
-25
5.4
1.2
-35
5.6
1.3
The best fit line is calculated
using the least mean squares
method:
y = m⋅x+b
m
=
∑
(x ⋅ y)−
∑^{x2 −}
∑^xâ‹âˆ‘
n
(_∑ x)²
n
y
b= ^∑y −m⋅^∑x
n
n
n = number of points
PRELIMINARY DATA SHEET - Rev 1.4
7
01/2006