clc451 National Semiconductor Corporation, clc451 Datasheet - Page 8

• Manufacturer Part Number: clc451
• Description: Single Supply, Low-power, High Output, Programmable Buffer
• Manufacturer: National Semiconductor Corporation

AC Coupled Single Supply Operation
Figures 4, 5, and 6 show possible non-inverting and invert-
ing configurations for input signals that go below 0.8V DC.
http://www.national.com
V
Note: R
R
consumption and maximum output swing.
V
in
Note: R
consumption and maximum output swing.
Figure 2: DC Coupled, A
Figure 3: DC Coupled, A
b
Figure 1: DC Coupled, A
Figure 4: AC Coupled, A
V
in
, R
Note: R
consumption and maximum output swing.
in
V
L
V
and R
in
C
cm
b
t
V
provides DC bias for the non-inverting input.
C
R
and R
cm
t
V
t
, R
V
t
are tied to V
R
cm
CC
V
L
V
L
t
and R
R
cm
R
R
are tied to V
cm
t
R
b
g
are tied to V
cm
3
1
2
4
2
3
1
4
for minimum power
cm
2
3
1
4
2
3
1
4
for minimum power
1k
1k
Select R
CLC451
CLC451
Low frequency cutoff
where R g = 1k .
1k
V
cm
1k
CLC451
o
CLC451
for minimum power
1k
1k
t
to yield desired R
V
v
1k
v
v
v
1k
in
= +1V/V Configuration
= +2V/V Configuration
= -1V/V Configuration
= -1V/V Configuration
2.5
8
7
6
5
8
7
6
5
8
7
6
5
8
7
6
5
in
V
V
V
= R
CC
CC
V
V
cm
V
V
CC
V
t
o
2 R C
||R
R
CC
cm
cm
6.8 F
0.1 F
g
L
R
6.8 F
0.1 F
, where R
R
+
1
+
L
g C
6.8 F
0.1 F
V
L
6.8 F
0.1 F
+
o
+
V
V
o
,
o
g
= 1k .
8
The input is AC coupled to prevent the need for
level shifting the input signal at the source. The resistive
voltage divider biases the non-inverting input to V
= 2.5V (For V
V
Dual Supply Operation
The CLC451 operates on dual supplies as well as single
supplies. The non-inverting and inverting configurations
are shown in Figures 7, 8 and 9.
V
in
V
Figure 5: AC Coupled, A
in
Figure 6: AC Coupled, A
Figure 7: Dual Supply, A
in
C
C
C
C
V
V
CC
R
CC
R
R
t
R
R
CC
R
C
b
V
3
2
4
1
EE
= +5V).
1k
2
3
3
1
4
2
4
6.8 F
0.1 F
1
CLC451
Low frequency cutoff
V
where R
+
o
1k
1k
CLC451
CLC451
1k
Low frequency cutoff
V
V
where R
in
o
in
v
v
1k
1k
v
2V
2.5
= +1V/V Configuration
= +2V/V Configuration
= -1V/V Configuration
R
in
2
8
7
6
5
in
Note: R
non-inverting input. Select R
yield desired R
2.5
R
2
8
7
6
5
8
7
6
5
R
V
CC
b
V
provides DC bias for the
o
2 R C
R
R
V
V
source
CC
6.8 F
0.1 F
CC
V
in
+
1
in C
= R
o
2 R C
R
V
source
6.8 F
0.1 F
o
6.8 F
0.1 F
t
||1k .
+
+
1
in C
,
CC
t
,
to
÷ 2