參數(shù)資料
型號: OPA2369AIDGKRG4
英文描述: 1.8V, 1レA max, Zer┆-Crossover RAIL-TO-RAIL I/O OPERATIONAL AMPLIFIER
中文描述: 1.8,1レ阿最大,澤爾┆-交叉軌至軌I / O運算放大器
文件頁數(shù): 11/20頁
文件大?。?/td> 644K
代理商: OPA2369AIDGKRG4
www.ti.com
WINDOW COMPARATOR
Figure 27
shows the OPA2369 used as a window
comparator. The threshold limits are set by V
H
and
V
L
, with V
H
> V
L
. When V
IN
<
VH
, the output of A1 is
low. When V
IN
>V
L
, the output of A2 is low.
Therefore, both op amp outputs are at 0V as long as
V
IN
is between V
H
and V
L
. This configuration results
in no current flowing through either diode, Q1 in
cutoff, with the base voltage at 0V, and V
OUT
forced
high.
V =
R
2
R +R
R
4
R +R
2
(5)
V =
4
(6)
3V
A1
A2
D1
(2)
D2
(2)
R
5
10k
W
R
6
5.1k
W
R
7
5.1k
W
R
IN
2k
W
(1)
3V
3V
Q1
(3)
R
1
V
H
V
L
R
2
1/2
OPA2369
1/2
OPA2369
3V
V
OUT
V
IN
3V
R
3
R
4
NOTES: (1) R
protects A1 and A2 from possible excess current flow.
(2) IN4446 or equivalent diodes.
(3) 2N2222 or equivalent NPN transistor.
IN
ADDITIONAL APPLICATION EXAMPLES
Figure 28
through
Figure 32
illustrate additional application examples.
R
1
V
EX
V
OUT
V
REF
R
1
OPA369
R
R
R R
+5V
OPA369
OPA2369
SBOS414A–AUGUST 2007–REVISED SEPTEMBER 2007
If V
IN
falls below V
L
, the output of A2 is high, current
flows through D2, and V
OUT
is low. Likewise, if V
IN
rises above V
H
, the output of A1 is high, current flows
through D1, and V
OUT
is low. The window comparator
threshold voltages are set as follows:
Figure 27. OPA2369 as a Window Comparator
Figure 28. Single Op Amp Bridge Amplifier
Copyright 2007, Texas Instruments Incorporated
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OPA369 OPA2369
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