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Электронный компонент: CA3078AE

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1
CA3078, CA3078A
2MHz, Micropower Operational Amplifier
The CA3078 and CA3078A are high gain monolithic
operational amplifiers which can deliver milliamperes of
current yet only consume microwatts of standby power. Their
operating points are externally adjustable and frequency
compensation may be accomplished with one external
capacitor. The CA3078 and CA3078A provide the designer
with the opportunity to tailor the frequency response and
improve the slew rate without sacrificing power. Operation
with a single 1.5V battery is a practical reality with these
devices.
The CA3078A is a premium device having a supply voltage
range of V
= 0.75V to V
= 15V. The CA3078 has the same
lower supply voltage limit but the upper limit is V+ = +6V and
V- = -6V.
Features
Low Standby Power . . . . . . . . . . . . . . . As Low As 700nW
Wide Supply Voltage Range. . . . . . . . . . .
0.75V to
15V
High Peak Output Current . . . . . . . . . . . . . . . 6.5mA (Min)
Adjustable Quiescent Current
Output Short Circuit Protection
Applications
Portable Electronics
Intrusion Alarms
Telemetry
Instrumentation
Medical Electronics
Pinouts
CA3078 (PDIP, SOIC)
TOP VIEW
CA3078 (METAL CAN)
TOP VIEW
NOTE: Case Voltage = Floating
Schematic Diagram
Ordering Information
PART NUMBER
(BRAND)
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
CA3078AE
-55 to 125
8 Ld PDIP
E8.3
CA3078AM
(3078A)
-55 to 125
8 Ld SOIC
M8.15
CA3078AM96
(3078A)
-55 to 125
8 Ld SOIC Tape and Reel M8.15
CA3078AT
-55 to 125
8 Pin Metal Can
T8.C
CA3078E
0 to 70
8 Ld PDIP
E8.3
CA3078M
(3078)
0 to 70
8 Ld SOIC
M8.15
CA3078T
0 to 70
8 Pin Metal Can
T8.C
8
7
6
5
1
2
3
4
COMP
INV. INPUT
NON-INV.
INPUT
COMP
OUTPUT
BIAS
V+
V-
+
-
COMP
OUTPUT
BIAS
2
4
6
1
3
7
5
8
+
TAB
R
SET
V+
V-
NON-INV.
INPUT
INV.
INPUT
V+
3
Q
1
Q
3
Q
4
Q
6
D
9
2
5
1
4
6
7
Q
10
Q
12
50
Q
18
OUTPUT
Q
16
Q
11
Q
13
Q
15
Q
17
D
8
Q
9
Q
14
50
V+
V-
COMPENSATION
D
6
D
7
Q
5
D
4
Q
2
D
1
BIAS
INVERTING
D
2
D
3
D
5
NON-
INVERTING
Q
7
Q
8
8
Data Sheet
December 1998
File Number
535.5
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Copyright
Intersil Corporation 1999
2
Absolute Maximum Ratings
Thermal Information
Supply Voltage (Between V+ and V- Terminal)
CA3078 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14V
CA3078A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36V
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V-
Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.1mA
Output Short Circuit Duration (Note 1). . . . . . . . . . . . . No Limitation
Operating Conditions
Temperature Range
CA3078 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
o
C to 70
o
C
CA3078A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to 125
o
C
Thermal Resistance (Typical, Note 2)
JA
(
o
C/W)
JC
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . .
130
N/A
SOIC Package . . . . . . . . . . . . . . . . . . .
165
N/A
Metal Can Package . . . . . . . . . . . . . . .
175
100
Maximum Junction Temperature (Metal Can Package). . . . . . . .175
o
C
Maximum Junction Temperature (Plastic Package) . . . . . . . .150
o
C
Maximum Storage Temperature Range . . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300
o
C
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Short circuit may be applied to ground or to either supply.
2.
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
For Equipment Design
PARAMETER
TEST CONDITIONS
CA3078 LIMITS
CA3078A LIMITS
UNITS
R
SET
= 1M
R
SET
= 5.1M
V+
and V-
R
S
(k
)
R
L
(k
)
T
A
= 25
o
C
T
A
= 0
o
C to
70
o
C
T
A
= 25
o
C
T
A
= -55
o
C to
125
o
C
MIN
TYP
MAX
MIN
MAX
MIN
TYP
MAX
MIN
MAX
V
IO
6V
10
-
-
1.3
4.5
-
5
-
0.70
3.5
-
4.5
mV
I
IO
-
-
-
6
32
-
40
-
0.50
2.5
-
5.0
nA
I
IB
-
-
-
60
170
-
200
-
7
12
-
50
nA
A
OL
-
10
88
92
-
86
-
92
100
-
90
-
dB
I
Q
-
-
-
100
130
-
150
-
20
25
-
45
A
P
D
-
-
-
1200
1560
-
1800
-
240
300
-
540
W
V
OM
-
10
5.1
5.3
-
5
-
5.1
5.3
-
5
-
V
V
ICR
10
-
-
-5.5 to
+5.8
-
-5 to
+5
-
-
-5.5 to
+5.8
-
-5 to
+5
-
V
CMRR
10
-
80
110
-
-
-
80
115
-
-
-
dB
I
OM
+ or I
OM
-
-
-
-
12
-
6.5
30
-
12
-
6.5
30
mA
V
IO
/
V+
10
-
76
93
-
-
-
76
105
-
-
-
V/V
V
IO
/
V-
10
-
76
93
-
-
-
76
105
-
-
-
V/V
R
SET
= 13M
V
IO
15V
10
-
-
-
-
-
-
-
1.4
3.5
-
4.5
mV
A
OL
-
10
-
-
-
-
-
92
100
-
88
-
dB
I
Q
-
-
-
-
-
-
-
-
20
30
-
50
A
P
D
-
-
-
-
-
-
-
-
600
750
-
1350
W
V
OM
-
10
-
-
-
-
-
13.7
14.1
-
13.5
-
V
CMRR
10
-
-
-
-
-
-
80
106
-
-
-
dB
I
IB
-
-
-
-
-
-
-
-
7
14
-
55
nA
I
IO
-
-
-
-
-
-
-
-
0.50
2.7
-
5.5
nA
CA3078, CA3078A
3
Electrical Specifications
T
A
= 25
o
C, Typical Values Intended Only for Design Guidance
PARAMETER
CA3078
CA3078A
UNITS
V+ = +1.3V,
V- = -1.3V
R
SET
= 2M
V+ = +0.75V,
V- = -0.75V
R
SET
= 10M
V+ = +1.3V,
V- = -1.3V
R
SET
= 2M
V+ = +0.75V,
V- = -0.75V
R
SET
= 10M
V
IO
1.3
1.5
0.7
0.9
mV
I
IO
1.7
0.5
0.3
0.054
nA
I
IB
9
1.3
3.7
0.45
nA
A
OL
80
60
84
65
dB
I
Q
10
1
10
1
A
P
D
26
1.5
26
1.5
W
V
OP-P
1.4
0.3
1.4
0.3
V
V
ICR
-0.8 to +1.1
-0.2 to +0.5
-0.8 to +1.1
-0.2 to +0.5
V
CMRR
100
90
100
90
dB
I
OM
12
0.5
12
0.5
mA
V
IO
/
V
20
50
20
50
V/V
Electrical Specifications
T
A
= 25
o
C and V
SUPPLY
=
6V, Typical Values Intended Only for Design Guidance
PARAMETER
TEST CONDITIONS
CA3078
CA3078A
UNITS
R
SET
= 1M
R
SET
= 5.1M
R
SET
= 1M
V
IO
/
T
A
R
S
10k
6
5
6
V/
o
C
I
IO
/
T
A
R
S
10k
70
6.3
70
pA/
o
C
GBWP
A
V
= 100, C
1
= 10pF
2
0.3
2
MHz
SR
See Figures 23, 24
0.04
0.027
0.04
V/
s
1.5
0.5
1.5
V/
s
t
R
10% to 90% Rise Time
2.5
3
2.5
s
R
I
-
0.87
7.4
1.7
M
R
O
-
0.8
1
0.8
k
e
N
(10Hz)
R
S
= 0
25
40
-
nV/
Hz
i
N
(10Hz)
R
S
= 1M
1
0.25
-
pA/
Hz
CA3078, CA3078A
4
Test Circuits
FIGURE 1. TRANSIENT RESPONSE AND SLEW RATE, UNITY
GAIN (INVERTING) TEST CIRCUIT
FIGURE 2. SLEW RATE, UNITY GAIN (NON-INVERTING)
TEST CIRCUIT
FIGURE 3. OFFSET VOLTAGE NULL CIRCUITS
FIGURE 4. INVERTING 20dB AMPLIFIER CIRCUIT
FIGURE 5. NON-INVERTING 20dB AMPLIFIER CIRCUIT
4
1
8
5
7
V+
100k
V+
R
SET
C
L
V
OUT
6
0V
0V
10k
100k
C
2
R
2
3
V
IN
R
1
R
2
- C
2
OPTIONAL
COMP.
R
1
C
1
+
-
CA3078
CA3078A
V-
51k
2
4
1
8
5
7
2
V+
100k
V+
R
SET
C
L
V
OUT
6
0V
0V
10k
100k
C
2
R
2
3
V
IN
R
1
R
2
- C
2
OPTIONAL
COMP.
R
1
C
1
+
-
CA3078
CA3078A
V-
7
+
-
CA3078
CA3078A
4
V+
OUTPUT
6
2
V-
INPUT
NON-INVERTING
R
I
R
B
R
I
R
F
1M
V-
V+
3
Value of R
B
required to have a
null adjustment range of
7.5mV
R
I
R
F
V+
R
B
R
I
R
F
assuming R
B
> >
R
I
+ R
F
(R
I
+ R
F
) 7.5 x 10
-3
7
-
+
CA3078
CA3078A
4
V+
OUTPUT
6
3
V-
INPUT
INVERTING
R
I
R
B
R
F
1M
V-
V+
2
Value of R
B
required to have a
null adjustment range of
7.5mV
R
I
V+
R
B
assuming R
B
> > R
I
7.5 x 10
-3
4
1
7
R
SET
=
7pF
8
5
-
CA3078
CA3078A
+
30M
10M
510k
10M
2
R
L
1.5V
"AA" CELL
+
5
F
+
-
5.1M
6
3
1
F
V
P-P
4
1
7
R
SET
=
7pF
8
5
-
CA3078
CA3078A
+
30M
10M
510k
10M
2
R
L
1.5V
"AA" CELL
+
5
F
+
-
5.1M
6
3
1
F
V
P-P
1
F
CA3078, CA3078A
5
Application Information
Compensation Techniques
The CA3078A and CA3078 can be phase compensated with
one or two external components depending upon the closed
loop gain, power consumption, and speed desired. The
recommended compensation is a resistor in series with a
capacitor connected from Terminal 1 to Terminal 8. Values of
the resistor and capacitor required for compensation as a
function of closed loop gain are shown in Figures 25 and 26.
These curves represent the compensation necessary at
quiescent currents of 100
A and 20
A, respectively, for a
transient response with 10% overshoot. Figures 23 and 24
show the slew rates that can be obtained with the two different
compensation techniques. Higher speeds can be achieved
with input compensation, but this increases noise output.
Compensation can also be accomplished with a single
capacitor connected from Terminal 1 to Terminal 8, with speed
being sacrificed for simplicity. Table 1 gives an indication of
slew rates that can be obtained with various compensation
techniques at quiescent currents of 100
A and 20
A.
Single Supply Operation
The CA3078A and CA3078 can operate from a single supply
with a minimum total supply voltage of 1.5V. Figures 4 and 5
show the CA3078A or CA3078 in inverting and non-inverting
20dB amplifier configurations utilizing a 1.5V type "AA" cell
for a supply. The total consumption for either circuit is
approximately 675nW. The output voltage swing in this
configuration is 300mV
P-P
with a 20k
load.
TABLE 1. UNITY GAIN SLEW RATE vs COMPENSATION - CA3078 AND CA3078A
V
SUPPLY
=
6V, Output Voltage (V
O
) =
5V, Load Resistance (R
L
) = 10k
,
Transient Response: 10% overshoot for an output voltage of 100mV,
Ambient Temperature (T
A
) = 25
o
C
COMPENSATION
TECHNIQUE
UNITY GAIN (INVERTING)
FIGURE 1
UNITY GAIN (NON-INVERTING)
FIGURE 2
R
1
C
1
R
2
C
2
SLEW RATE
R
1
C
1
R
2
C
2
SLEW RATE
k
pF
k
F
V/
s
k
pF
k
F
V/
s
CA3078 - I
Q
= 100
A
Single Capacitor
0
750
0
0.0085
0
1500
0
0.0095
Resistor and Capacitor
3.5
350
0
0.04
5.3
500
0
0.024
Input
0
0.25
0.306
0.67
0
0.311
0.45
0.67
CA3078A - I
Q
= 20
A
Single Capacitor
0
300
0
0.0095
0
800
0
0.003
Resistor and Capacitor
14
100
0
0.027
34
125
0
0.02
Input
0
0.644
0.156
0.29
0
0.77
0.4
0.4
Typical Performance Curves
FIGURE 6. INPUT OFFSET VOLTAGE vs TOTAL QUIESCENT
CURRENT
FIGURE 7. INPUT OFFSET CURRENT vs TOTAL QUIESCENT
CURRENT
1
10
100
TOTAL QUIESCENT CURRENT
(
A)
INPUT OFFSET V
O
L
T
A
GE (mV)
3.0
2.4
1.8
1.2
0.6
0
1000
V
S
=
6
T
A
= 25
o
C
R
S
10k
CA3078A
CA3078
CA3078A
CA3078
INPUT OFFSET CURRENT (nA)
1
10
1000
TOTAL QUIESCENT CURRENT
(
A)
0.01
10000
T
A
= 25
o
C
100
0.1
1
10
V
S
=
6
CA3078, CA3078A