Datasheet

C4
0.01
PF
1N4731A
(4.3V)
D1
7
2
6
4
3
Input
-15V
R6
10k
(-0.7V)
-
+
R1
R7, 3.9k
R2
C2
3
2
6
7
4
LMP201X
U1
LM6171
U2
+
-
R5, 1M
(+2.5V)
Output
C5
0.01 PF
+15V
R4
3.9k
R3
20k
D2
1N4148
C3
0.01 PF
+15V
LMP2011, LMP2012
www.ti.com SNOSA71K –OCTOBER 2004–REVISED MARCH 2013
Figure 35. Composite Amplifier Configuration
Table 1. Composite Amplifier Measured Performance
A
V
R1 R2 C2 BW SR en p-p
(Ω) (Ω) (pF) (MHz) (V/μs) (mV
PP
)
50 200 10k 8 3.3 178 37
100 100 10k 10 2.5 174 70
100 1k 100k 0.67 3.1 170 70
500 200 100k 1.75 1.4 96 250
1000 100 100k 2.2 0.98 64 400
In terms of the measured output peak-to-peak noise, the following relationship holds between output noise
voltage, e
n
p-p, for different closed-loop gain, A
V
, settings, where −3 dB Bandwidth is BW:
(1)
Figure 36. Composite Amplifier Configuration
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