CA3094 Просмотр технического описания (PDF) - Intersil
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CA3094 Datasheet PDF : 14 Pages
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CA3094, CA3094A, CA3094B
Test Circuits (Continued)
+15V
56kΩ
R2
R1
51Ω
5
7
8
2
-
CA3094A
3
+
6
4
1
2kΩ
RC
CC
-15V
R3
OUTPUT
CLOSED
LOOP GAIN
(dB)
0
20
40
R1
(kΩ)
10
10
1
R2
(kΩ)
∞
1
0.1
R3
(kΩ)
10
10
10
FIGURE 9. PHASE COMPENSATION TEST CIRCUIT
120VAC
V+ = 30V
RLOAD
R5
7
S2
8
S1
R6
(NOTE 12)
D1
5
3+
CA3094A
2-
6
4
R8
R7
C1
R1
EOUT
R2
R3
R4
MT2
MT1
COMMON
NOTES:
12. C1 = 0.5µF
D1 = 1N914
R1 = 0.51MΩ = 3 min.
R2 = 5.1MΩ = 30 min.
R3 = 22MΩ = 2 hrs.
R4 = 44MΩ = 4 hrs.
R5 = 1.5kΩ
R6 = 50kΩ
R7 = 5.1kΩ
R8 = 1.5kΩ
S1
29V
3V
30
27V
60
Time = 1 hr.
S2 Set to R4
13. Potentiometer required for initial time set to permit device inter-
connecting. Time variation with temperature <0.3%/oC.
FIGURE 10. PRESETTABLE ANALOG TIMER
Application Information
For additional application information, refer to
Application Note AN6048, “Some Applications of a
Programmable Power/Switch Amplifier IC” and AN6077
“An IC Operational Transconductance Amplifier (OTA)
with Power Capability”.
Design Considerations
The selection of the optimum amplifier bias current (IABC)
depends on:
1. The Desired Sensitivity - The higher the IABC, the higher
the sensitivity, i.e., a greater drive current capability at the
output for a specific voltage change at the input.
2. Required Input Resistance - The lower the IABC, the high-
er the input resistance.
If the desired sensitivity and required input resistance are
not known and are to be experimentally determined, or the
anticipated equipment design is sufficiently flexible to
tolerate a wide range of these parameters, it is
recommended that the equipment designer begin his
calculations with an IABC of 100µA, since the CA3094 is
characterized at this value of amplifier bias current.
The CA3094 is extremely versatile and can be used in a
wide variety of applications.
3-6
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