June 1998

7

MIC7111

MIC7111

Micrel

change when changing from a breadboard to the final circuit

layout.

Typical Circuits

Some single-supply, rail-to-rail applications for which the

MIC7111 is well suited are shown in the circuit diagrams of

Figures 3 through 7.

R2

910k

R1

100k

0V to V+

V+

1.8V to 10V

2

5

1

3

4

MIC7111

0V to

V+

Figure 3a. Noninverting Amplifier

0

100

0

100

V

V+

A1

R2

R1

≈ 10

Figure 3b. Noninverting Amplifier Behavior

0V to V+

V+

1.8V to 10V

0V to V+

2

5

1

3

4

MIC7111

Figure 4. Voltage Follower/Buffer

0V to V+

V+

1.8V to 10V

0V to 2V

2

5

1

3

4

MIC7111

10

Ω

Q1

2N3904

{

for higher current

and/or different gain.

I

V

R

100mA/V as shown

OUT

IN

S

==

Figure 5. Voltage-Controlled Current Sink

V+

0V

R4

100k

R4

100k

R3

100k

V+

2

5

1

4

3

MIC7111

C1

0.001µF

R2

100k

V+

Figure 6. Square Wave Oscillator

R3

330k

R1

33k

0V

R2

330k

R4

330k

C1

1µF

V+

2

5

1

4

3

MIC7111

V+

A

R2

R1

330k

33k

10

=

= −

Figure 7. AC-Coupled Inverting Amplifier