LMC7101
Micrel
Typical Circuits
VS
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.
0.5V to Q1 VCEO(sus)
VOUT
0V to V+
V+
V+
3
4
2
3
4
2
5
LMC7101
LMC7101
VIN
V +
VIN
0V to 2V
IOUT
1
1
VOUT
0V to V+
0V to
Q1
2N3904
A
V
CEO = 40V
V
5
{
IC(max) = 200mA
RS
R2
10Ω
Change Q1 and RS
for higher current
and/or different gain.
900k
1⁄2W
R1
100k
V
IN
IOUT
=
= 100mA/V as shown
RS
Figure 3a. Noninverting Amplifier
Figure 5. Voltage-Controlled Current Sink
100
V+
R4
100k
C1
V+
0.001µF
R2
R1
A
= 1 +
≈ 10
V
4
3
2
LMC7101
1
VOUT
V+
0V
0
5
0
100
V
(V)
IN
R4
R2
Figure 3b. Noninverting Amplifier Behavior
V+
100k
100k
R3
100k
V+
3
4
2
5
LMC7101
VIN
0V to V+
1
Figure 6. Square Wave Oscillator
VOUT
0V to V+
CIN
R1
R2
33k
330k
V+
VOUT = VIN
Figure 4. Voltage Follower
4
3
2
LMC7101
COUT
VOUT
1
0V
RL
5
R3
R4
R2 330k
= = −10
V+
A = −
V
330k
330k
R1 33k
C1
1µF
Figure 7. AC-Coupled Inverting Amplifier
LMC7101
10
September 1999
MICREL [ MICREL SEMICONDUCTOR ]
