LMC7101_05 MICREL [Micrel Semiconductor], LMC7101_05 Datasheet - Page 10

• Manufacturer Part Number: LMC7101_05
• Description: Low-Power Operational Amplifier
• Manufacturer: MICREL [Micrel Semiconductor]

LMC7101
Typical Circuits
Some single-supply, rail-to-rail applications for which the
LMC7101 is well suited are shown in the circuit diagrams of
Figures 3 through 7.
LMC7101
Figure 3b. Noninverting Amplifier Behavior
Figure 3a. Noninverting Amplifier
0V to
0V to V+
V
Figure 4. Voltage Follower
100
V+
IN
V
0
IN
0
V +
A
V
3
4
3
4
R1
100k
A
V
V+
900k
V
R2
V+
= 1 +
2
5
IN
2
5
(V)
LMC7101
LMC7101
R2
R
1
1
1
≈
V
10
OUT
0V to V+
100
0V to V+
V
= V
V
OUT
OUT
IN
10
0V to 2V
V
V+
Figure 5. Voltage-Controlled Current Sink
IN
0.001µF
C
Figure 7. AC-Coupled Inverting Amplifier
IN
V+
33k
Change Q1 and R
for higher current
and/or different gain.
I
R1
330k
OUT
Figure 6. Square Wave Oscillator
C1
R3
3
4
100k
R2
=
V+
4
3
V
R
C1
1µF
IN
2
5
S
LMC7101
4
3
R3
100k
330k
330k
=
R2
R4
V+
100mA/V as shown
0.5V to Q1 V
1
2
5
100k
100k
R4
R4
S
V+
LMC7101
2
5
1
LMC7101
V
S
A
1
R
10Ω
1
Q1
2N3904
⁄
V
I
2
OUT
S
CEO(sus)
W
= −
C
0V to V+
OUT
R2
R1
V
R
V+
0V
OUT
{
L
V
I
=
C(max)
CEO
V
February 2005
0V
330k
V
33k
OUT
OUT
= 40V
= 200mA
Micrel, Inc.
= −
10