S E M I C O N D U C T O R
CA3140
BiMOS Operational Amplifier
with MOSFET Input/Bipolar Output
Description
The CA3140A and CA3140 are integrated circuit operational amplifiers
that combine the advantages of high voltage PMOS transistors with
high voltage bipolar transistors on a single monolithic chip. Because of
this unique combination of technologies, this device can now provide
designers, for the first time, with the special performance features of
the CA3130 CMOS operational amplifiers and the versatility of the 741
series of industry standard operational amplifiers.
The CA3140A and CA3140 BiMOS operational amplifiers feature gate
protected MOSFET (PMOS) transistors in the input circuit to provide
very high input impedance, very low input current, and high speed per-
formance. The CA3140A and CA3140 operate at supply voltage from
4V to 36V (either single or dual supply). These operational amplifiers
are internally phase compensated to achieve stable operation in unity
gain follower operation, and additionally, have access terminal for a
supplementary external capacitor if additional frequency roll-off is
desired. Terminals are also provided for use in applications requiring
input offset voltage nulling. The use of PMOS field effect transistors in
the input stage results in common mode input voltage capability down
to 0.5V below the negative supply terminal, an important attribute for
single supply applications. The output stage uses bipolar transistors
and includes built-in protection against damage from load terminal
short circuiting to either supply rail or to ground.
The CA3140 Series has the same 8-lead pinout used for the “741” and
other industry standard op amps. The CA3140A and CA3140 are
intended for operation at supply voltages up to 36V (±18V).
April 1994
Features
• MOSFET Input Stage
- Very High Input Impedance (Z
IN
) -1.5TΩ (Typ.)
- Very Low Input Current (I
l
) -10pA (Typ.) at
±15V
- Wide Common Mode Input Voltage Range
(VlCR) - Can be Swung 0.5V Below Negative
Supply Voltage Rail
- Output Swing Complements Input Common
Mode Range
• Directly Replaces Industry Type 741 in Most
Applications
Applications
• Ground-Referenced Single Supply Amplifiers in
Automobile and Portable Instrumentation
• Sample and Hold Amplifiers
• Long Duration Timers/Multivibrators
(µseconds-Minutes-Hours)
• Photocurrent Instrumentation
• Peak Detectors
• Active Filters
• Comparators
• Interface in 5V TTL Systems and Other Low
Supply Voltage Systems
• All Standard Operational Amplifier Applications
• Function Generators
• Tone Controls
• Power Supplies
• Portable Instruments
• Intrusion Alarm Systems
Ordering Information
PART NUMBER
CA3140AE
CA3140AM
CA3140AS
CA3140AT
CA3140BT
CA3140E
CA3140M
CA3140M96
CA3140T
TEMP. RANGE
-55
o
C
-55
o
C
-55
o
C
-55
o
C
-55
o
C
-55
o
C
to
to
to
to
to
to
+125
o
C
+125
o
C
+125
o
C
+125
o
C
+125
o
C
+125
o
C
-55
o
C to +125
o
C
PACKAGE
8 Lead Plastic DIP
8 Lead SOIC
8 Pin Can, Lead Formed
8 Pin Can
8 Pin Can
8 Lead Plastic DIP
8 Lead SOIC
8 Lead SOIC*
8 Pin Can
-55
o
C to +125
o
C
-55
o
C to +125
o
C
* Denotes Tape and Reel
Pinouts
CA3140 (TO-5 STYLE CAN)
TOP VIEW
TAB
8
OFFSET
NULL
INV. 2
INPUT
NON-INV.
INPUT
3
1
7
V+
6 OUTPUT
5
OFFSET
NULL
STROBE
OFFSET
NULL
INV. INPUT
CA3140 (PDIP, SOIC)
TOP VIEW
1
2
3
4
8
STROBE
V+
OUTPUT
OFFSET
NULL
–
+
–
+
7
6
5
NON-INV.
INPUT
V-
4
V- AND CASE
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright
©
Harris Corporation 1993
File Number
957.2
2-123
Specifications CA3140, CA3140A
Absolute Maximum Ratings
DC Supply Voltage (Between V+ and V- Terminals). . . . . . . . . . 36V
Differential Mode Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 8V
DC Input Voltage . . . . . . . . . . . . . . . . . . . . . .(V+ +8V) To (V- -0.5V)
Input Terminal Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1mA
Output Short Circuit Duration* . . . . . . . . . . . . . . . . . . . . . . Indefinite
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175
o
C
Junction Temperature (Plastic Package) . . . . . . . . . . . . . . . +150
o
C
Lead Temperature (Soldering 10 Sec.). . . . . . . . . . . . . . . . . +300
o
C
* Short circuit may be applied to ground or to either supply.
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.
Operating Conditions
OperatingTemperature Range (All Types). . . . . . . . -55
o
C to +125
o
C
Storage Temperature Range (All Types). . . . . . . . . -65
o
C to +150
o
C
Electrical Specifications
PARAMETERS
V+ = +15V, V- = -15V, T
A
= +25
o
C
SYMBOL
TEST CONDITIONS
Typical Value of Resistor
Between Term. 4 and 5 or 4
and 1 to Adjust Max. V
I0
R
I
C
I
R
O
e
N
BW = 140kHz
R
S
= 1 MΩ
f = 1kHz
f = 10 kHz
R
S
= 100Ω
CA3140A
18
CA3140
4.7
UNITS
kΩ
Input Offset Voltage Adjustment Resistor
Input Resistance
Input Capacitance
Output Resistance
Equivalent Wideband Input Noise Voltage
(See Figure 35)
Equivalent Input Noise Voltage (See Figure 7)
1.5
4
60
48
1.5
4
60
48
TΩ
pF
Ω
µV
e
N
40
12
40
12
nV/√Hz
nV/√Hz
Short Circuit Current to Opposite Supply
Source
Sink
Gain-Bandwidth Product, (See Figures 2 & 15)
Slew Rate, (See Figure 3)
Sink Current From Terminal 8 To Terminal 4 to Swing
Output Low
Transient Response:
Rise Time
Overshoot (See Figure 34)
Settling Time at 10 V
P-P
, (See Figure 14)
1mV
10mV
t
R
OS
t
S
R
L
= 2kΩ
C
L
= 100pF
Voltage Follower
R
L
= 2kΩ
C
L
= 100pF
0.08
10
0.08
10
I
OM
+
I
OM
-
f
T
SR
40
18
4.5
9
220
40
18
4.5
9
220
mA
mA
MHz
V/µs
µA
µs
%
4.5
1.4
4.5
1.4
µs
µs
2-124
Specifications CA3140, CA3140A
Electrical Specifications
For Equipment Design. At V+ = 15V, V- = 15V, T
A
= +25
o
C, Unless Otherwise Specified
LIMITS
CA3140A
PARAMETERS
Input Offset Voltage
Input Offset Current
Input Current
Large Signal Voltage Gain (Note 1)
(See Figures 1, 15)
SYMBOL
|V
IO
|
|I
IO
|
I
I
A
OL
MIN
-
-
-
20
86
Common Mode Rejection Ratio
(See Figure 6)
CMRR
-
70
Common Mode Input Voltage Range
(See Figure 17)
V
ICR
-15
TYP
2
0.5
10
l00
100
32
90
-15.5
to
+12.5
100
80
13
-14.4
4
120
6
MAX
5
20
40
-
-
320
-
12
MIN
-
-
-
20
86
-
70
-15
CA3140
TYP
5
0.5
10
100
100
32
90
-15.5
to
+12.5
100
80
13
-14.4
4
120
8
MAX
15
30
50
-
-
320
-
11
UNITS
mV
pA
pA
kV/V
dB
µV/V
dB
V
Power-Supply Rejection Ratio,
∆V
IO
/∆V
S
(See Figure 8)
PSRR
-
76
150
-
-
-
6
180
-
-
76
+12
-14
-
-
-
150
-
-
-
6
180
-
µV/V
dB
V
V
mA
mW
µV/
o
C
Max. Output Voltage (Note 2)
(See Figures 10, 17)
V
OM
+
V
OM
-
+12
-14
-
-
-
Supply Current (See Figure 4)
Device Dissipation
Input Offset Voltage Temp. Drift,
∆V
IO
/∆T
NOTES:
1. At V
O
= 26V
p-p
, +12V, 14V and R
L
= 2kΩ.
2. At R
L
= 2kΩ.
I+
P
D
Electrical Specifications
For Design Guidance. At V+ = 5 V, V- = 0V, T
A
= +25
o
C
SYMBOL
|V
IO
|
|I
IO
|
I
I
R
I
A
OL
CA3140A
2
0.1
2
1
100
100
CA3140
5
0.1
2
1
100
100
UNITS
mV
pA
pA
TΩ
kV/V
dB
PARAMETERS
Input Offset Voltage
Input Offset Current
Input Current
Input Resistance
Large Signal Voltage Gain
(See Figures 1, 15)
2-125
Specifications CA3140, CA3140A
Electrical Specifications
For Design Guidance. At V+ = 5 V, V- = 0V, T
A
= +25
o
C
(Continued)
SYMBOL
CMRR
CA3140A
32
90
Common Mode Input Voltage Range (See Figure 17)
V
ICR
-0.5
2.6
Power Supply Rejection Ratio
PSRR
∆V
I0
/∆V
S
100
80
Maximum Output Voltage (See Figures 10, 17)
V
OM
+
V
OM
-
Maximum Output Current:
Source
Sink
Slew Rate (See Figure 3)
Gain-Bandwidth Product (See Figure 2)
Supply Current (See Figure 4)
Device Dissipation
Sink Current from Term. 8 to Term. 4 to Swing Output Low
IOM+
IOM-
SR
f
T
I+
P
D
10
1
7
3.7
1.6
8
200
10
1
7
3.7
1.6
8
200
mA
mA
V/µs
MHz
mA
mW
µA
3
0.13
CA3140
32
90
-0.5
2.6
100
80
3
0.13
UNITS
µV/V
dB
V
V
µV/V
dB
V
V
PARAMETERS
Common Mode Rejection Ratio,
2-126
CA3140A, CA3140
Block Diagram
2mA
BIAS CIRCUIT
CURRENT SOURCES
AND REGULATOR
+
3
INPUT
-
2
200µA
1.6mA
200µA
A
≈
10,000
C1
12pF
5
1
8
STROBE
4 V-
2µA
2mA
4mA
7 V+
A
≈
10
A
≈
1
6 OUTPUT
OFFSET
NULL
Schematic Diagram
BIAS CIRCUIT
INPUT STAGE
SECOND STAGE
OUTPUT STAGE
DYNAMIC CURRENT SINK
7 V+
C1
Q3
D7
Q2
R9
50Ω
R10
1k
Q19 R11
20Ω
R12
12k
Q20
D8
R14
20k
R13
5k
Q1
Q6
Q5
Q4
Q7
R1
8k
Q8
Q17
R8
1k
Q18
Q21
6 OUTPUT
D2
D3
D4
D5
INVERTING
INPUT
NON-INVERTING
INPUT
2
-
+
3
R2
500Ω
R3
500Ω
Q9
Q10
C1
12pF
Q14
Q11
Q12
Q13
D6
Q15
Q16
R4
500Ω
R5
500Ω
R6
50Ω
R7
30Ω
5
OFFSET NULL
ALL RESISTANCE VALUES ARE IN
Ω
1
8
STROBE
4
V-
2-127
嵌入式系统
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