AM-1435MM Murata Power Solutions Inc, AM-1435MM Datasheet - Page 3

• Manufacturer Part Number: AM-1435MM
• Description: Amplifer
• Manufacturer: Murata Power Solutions Inc

TYPICAL CONNECTION AND COMPENSATION
The typical connection diagram (above) shows the AM-1435 in
a unity-gain inverting configuration. When used in any
conventional operational-amplifier configuration, the AM-1435
(as a non-inverting amplifier) requires a noise gain of at least
two (noise gain = 1 + R4/R1).
The 2pF compensation capacitor, C1, at pin 3 is required for
stable operation when the noise gain is less than 10.
Compensation for bias current is provided by R2 and its value
is determined by the formula:
®
120
100
-20
80
60
40
20
0
100 200 500 1k
Figure 3. Gain and Phase vs. Frequency
R2 =
PHASE ANGLE
INPUT
10k
(Uncompensated)
FREQUENCY (Hz)
(R1) x (R4)
®
R1 + R4
100k
1k
R1
1M
GAIN
500
2pF
R2
C1
10M
1µF
C2
3
7
8
+
1µF
100M
C3
Figure 2. Typical Connection Diagram
+
+
+15V
–15V
–
12
4
0°
40°
60°
100°
140°
180°
14
5
1k
R3
The offset adjust potentiometer R3 and the compensation
capacitor C4 are optional. Note, however, that C4 should be
implemented when driving capacitive loads to prevent
oscillation of the output stage.
Operation of the AM-1435 at low impedances requires careful
attention to include the feedback resistor as a part of the total
output load.
1k
R4
+
6
1
OFFSET
ADJUST
(OPT.)
1µF
C4 (OPT.)
120
100
-20
80
60
40
20
0
100 200 500 1k
PHASE ANGLE
2
13
Figure 4. Gain and Phase vs. Frequency
GAIN
10k
(Compensated 2pF)
FREQUENCY (Hz)
100k
OUTPUT
1M
10M
AM-1435
100M
Amplifiers
180°
140°
100°
60°
20°
0°
7-5