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CA3094AT Datenblatt(PDF) 7 Page - Intersil Corporation

Teilenummer CA3094AT
Bauteilbeschribung  30MHz, High Output Current Operational Transconductance Amplifier (OTA)
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Hersteller  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CA3094AT Datenblatt(HTML) 7 Page - Intersil Corporation

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3-7
Typical Applications
NOTE: In single-ended output operation, the CA3094 may require a pull up or pull down resistor.
FIGURE 11A. INVERTING OP AMP
FIGURE 11B. NON-INVERTING MODE, AS A FOLLOWER
FIGURE 11. APPLICATION OF THE CA3094
FIGURE 12. RC TIMER
FIGURE 13. RC TIMER TRIGGERED BY EXTERNAL NEGATIVE PULSE
CA3094
-
+
EIN
EOUT
(NOTE)
Z1
Z2
CA3094
-
+
EIN
EOUT
(NOTE)
Where EOUT = EIN
Where
depends on the characteristics of Z1 and Z2
E
OU T
E
IN
-----------------
f
Z
2
Z
1
-------



=
CA3094
2
3
6
4
8
5
7
-
+
R2
220k
R1
100k
R
A
12V
EOUT
2k
PULL UP
RABC
220k
II
1N914
S1
V+ = 18V
+18
0
0
2/3V+
VOLTAGE A
VOLTAGE AT
TERMINAL 8
TIME DELAY (s) = RC (APPROX.)
Problem: To calculate the maximum value of R required to
switch a 100mA output current comparator
Given:
II = 500nA at IABC = 100µA (from Figure 3)
II = 5µA can be determined by drawing a line on Figure 3 through
IABC = 100µA and IB = 500nA parallel to the typical TA = 25
oC
curve.
Then: II = 33nA at IABC = 5µA
Ratio of II at TA = 25
oC to I
I at TA = -55
oC for any given value
of IABC
I
ABC
5
µA,
=
R
ABC
3.6M
18V
5
µA
-----------
=
R
MAX
18V
12V
33nA
----------------------------
180 M
Ω at T
A
25
o
C
==
=
R
MAX
180M
Ω 23
×
120M
Ω at T
A
55
o
C
==
=
C
CA3094
3
2
4
5
7
8
-
+
R3
1M
R1
1M
6
R2
2.2M
RLOAD
2k
C1
0.5
µF
EOUT
E
100
270
100
k
100
k
100
k
k
k
INPUT
A
12VDC
0.01
µF
B
C
V+
220k
On a negative going transient at input (A), a negative
pulse at C will turn “on” the CA3094, and the output (E)
will go from a low to a high level.
At the end of the time constant determined by C1, R1,
R2, R3, the CA3094 will return to the “off” state and the
output will be pulled low by RLOAD. This condition will
be independent of the interval when input (A) returns
to a high level.
V+
0
0
0
0
0
V+
3/
4V+
A
B
C
D
E
D
1N914
CA3094, CA3094A, CA3094B


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