Intersil Corporation CA3240, CA3240A Datasheet

CA3240, CA3240A

Data Sheet September 1998 File Number 1050.4

Dual, 4.5MHz, BiMOS Operational Amplifier
with MOSFET Input/Bipolar Output

The CA3240A and CA3240 are dual versions of the popular
CA3140 series integrated circuit operational amplifiers.They
combine the advantages of MOS and bipolar transistors on
the same monolithic chip. The gate-protected MOSFET
(PMOS) input transistors provide high input impedance and
a wide common-mode input voltage range (typically to 0.5V
below the negative supply rail). The bipolar output
transistors allow a wide output voltage swing and provide a
high output current capability.

The CA3240A and CA3240 are compatible with the industry
standard 1458 operational amplifiers in similar packages.The
offset nullfeatureisavailableonly when these types are supplied
in the 14 lead PDIP package (E1 suffix).

Ordering Information

TEMP.

PART NUMBER

RANGE (oC) PACKAGE

CA3240AE -40 to 85 8 Ld PDIP E8.3
CA3240AE1 -40 to 85 14 Ld PDIP E14.3
CA3240E -40 to 85 8 Ld PDIP E8.3

PKG.

NO.

Features

• Dual Version of CA3140

• Internally Compensated

• MOSFET Input Stage

- Very High Input Impedance (Z

- Very Low Input Current (I

- Wide Common-Mode Input Voltage Range (V

) 1.5TΩ (Typ)

IN

) 10pA (Typ) at ±15V

I

ICR

): Can

Be Swung 0.5V Below Negative Supply Voltage Rail

• Directly Replaces Industry Type 741 in Most Applications

Applications

• Ground Referenced Single Amplifiers in Automobile and
Portable Instrumentation

• Sample and Hold Amplifiers

• Long Duration Timers/Multivibrators (Microseconds­Minutes-Hours)

• Photocurrent Instrumentation

• Intrusion Alarm System • Active Filters

• Comparators • Function Generators

• Instrumentation Amplifiers • Power Supplies

Functional Diagram

2mA 4mA

BIAS CIRCUIT

CURRENT SOURCES

AND REGULATOR

+

IN-

PUT

A ≈ 10

-

OFFSET NULL

NOTE: Only available with 14 lead DIP (E1 Suffix).

A ≈ 10,000

12pF

A ≈ 1

C

1

Pinouts

CA3240, CA3240A (PDIP)

V+

OUTPUT (A)

INV.

INPUT (A)

NON-INV.

2mA1.6mA 2µA200µA200µA

OUT-

PUT

V-

INPUT (A)

INV.

INPUT (A)

NON-INV.

INPUT (A)

OFFSET

NULL (A)

OFFSET

NULL (B)

NON - INV.

INPUT (B)

INV.

INPUT (B)

† Pins 9 and 13 internally connected through approximately 3Ω.

TOP VIEW

1
2
3
4

V-

CA3240A (PDIP)

TOP VIEW

1
2
3
4

V-

5
6
7

8

V+
OUTPUT

7

INV.

6

INPUT (B)
NON-INV.

5

INPUT (B)

OFFSET

14

NULL (A)

13

V+

†

OUTPUT (A)

12

NC

11

OUTPUT (B)

10

9

V+

†

OFFSET

8

NULL (B)

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

| Copyright © Intersil Corporation 1999

CA3240, CA3240A

Absolute Maximum Ratings Thermal Information

Supply Voltage (Between V+ and V-). . . . . . . . . . . . . . . . . . . . . 36V

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . (V+ +8V) to (V- -0.5V)

Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1mA

Output Short Circuit Duration (Note 1). . . . . . . . . . . . . . . . Indefinite

Operating Conditions

Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC

Voltage Range. . . . . . . . . . . . . . . . . . . . . 4V to 36V or ±2V to ±18V

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. Temperatures and/or supply voltages must be limited to keep dissipation within max­imum rating.

2. θJA is measured with the component mounted on an evaluation PC board in free air.

Thermal Resistance (Typical, Note 2) θJA (oC/W)

8 Lead PDIP Package . . . . . . . . . . . . . . . . . . . . . . . 100

14 Lead PDIP Package . . . . . . . . . . . . . . . . . . . . . . 100

Maximum Junction Temperature (Plastic Package) . . . . . . . 150oC

Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC

Electrical Specifications For Equipment Design, V

PARAMETER SYMBOL

Input Offset Voltage V
Input Offset Current I
Input Current I
Large-Signal Voltage Gain

(See Figures 13, 28) (Note 3)
Common Mode Rejection

Ratio (See Figure 18)
Common Mode Input Voltage Range

(See Figure 25)
Power Supply Rejection Ratio

(See Figure 20)

(∆VIO/∆V±)

Maximum Output Voltage (Note 4)
(See Figures 24, 25)

Maximum Output Voltage (Note 5) V
Total Supply Current

(See Figure 16) For Both Amps
Total Device Dissipation P

NOTES:

3. At VO = 26V

, +12V, -14V and RL = 2kΩ.

P-P

4. At RL = 2kΩ.

5. At V+ = 5V, V- = GND, I

SINK

= 200µA.

IO

IO

I

A

OL

CMRR - 32 320 - 32 320 µV/V

V

ICR

PSRR

VOM+ 12 13 - 12 13 - V

VOM- -14 -14.4 - -14 -14.4 - V

OM-

I+ - 8 12 - 8 12 mA

D

- 5 15 - 2 5 mV

- 0.5 30 - 0.5 20 pA

- 10 50 - 10 40 pA
20 100 - 20 100 - kV/V
86 100 - 86 100 - dB

70 90 - 70 90 - dB

-15 -15.5 to

- 100 150 - 100 150 µV/V
76 80 - 76 80 - dB

0.4 0.13 - 0.4 0.13 - V

- 240 360 - 240 360 mW

SUPPLY

= ±15V, TA = 25oC, Unless Otherwise Specified

CA3240 CA3240A

11 -15 -15.5 to

+12.5

UNITSMIN TYP MAX MIN TYP MAX

12 V

+12.5

Electrical Specifications For Equipment Design, V

PARAMETER SYMBOL TEST CONDITIONS

Input Offset Voltage Adjustment Resistor (E1
Package Only)

Input Resistance R
Input Capacitance C
Output Resistance R
Equivalent Wideband Input Noise Voltage

(See Figure 2)

2

I
I

O

e

N

SUPPLY

= ±15V, TA = 25oC, Unless Otherwise Specified

TYPICAL VALUES

UNITSCA3240A CA3240

TypicalValueofResistorBetweenT erminals4and3(5)
or Between 4 and 14(8) to Adjust Maximum V

IO

18 4.7 kΩ

1.5 1.5 TΩ
44pF

60 60 Ω

BW = 140kHz, RS = 1MΩ 48 48 µV

CA3240, CA3240A

Electrical Specifications For Equipment Design, V

SUPPLY

= ±15V, TA = 25oC, Unless Otherwise Specified (Continued)

TYPICAL VALUES

PARAMETER SYMBOL TEST CONDITIONS

Equivalent Input Noise Voltage
(See Figure 19)

e

f = 1kHz, RS = 100Ω 40 40 nV/√Hz

N

f = 10kHz, RS = 100Ω 12 12 nV/√Hz

UNITSCA3240A CA3240

Short-Circuit Current to Opposite Supply IOM+ Source 40 40 mA

IOM- Sink 11 11 mA

Gain Bandwidth Product (See Figures 14, 28) f

T

4.5 4.5 MHz

Slew Rate (See Figure 15) SR 9 9 V/µs
Transient Response (See Figure 1) t

RL = 2kΩ, CL = 100pF Rise Time 0.08 0.08 µs

r

OS RL = 2kΩ, CL = 100pF Overshoot 10 10 %

Settling Time at 10V

(See Figure 26) t

P-P

AV = +1, RL = 2kΩ, CL = 100pF,

S

Voltage Follower

To 1mV 4.5 4.5 µs
To 10mV 1.4 1.4 µs

Crosstalk (See Figure 23) f = 1kHz 120 120 dB

Electrical Specifications For Equipment Design, at V

= ±15V, TA = -40 to 85oC, Unless Otherwise Specified

SUPPLY

TYPICAL VALUES

PARAMETER SYMBOL

UNITSCA3240A CA3240

Input Offset Voltage |VIO| 3 10 mV
Input Offset Current (Note 8) |IIO|32 32pA
Input Current (Note 8) I
Large Signal Voltage Gain (See Figures 13, 28), (Note 6) A

I

OL

640 640 pA

63 63 kV/V
96 96 dB

Common Mode Rejection Ratio (See Figure 18) CMRR 32 32 µV/V

90 90 dB

Common Mode Input Voltage Range (See Figure 25) V

ICR

Power Supply Rejection Ratio (See Figure 20) PSRR

(∆VIO/∆V±)

-15 to +12.3 -15 to +12.3 V
150 150 µV/V

76 76 dB

Maximum Output Voltage (Note 7) (See Figures 24, 25) VOM+ 12.4 12.4 V

VOM- -14.2 -14.2 V
Supply Current (See Figure 16) Total For Both Amps I+ 8.4 8.4 mA
Total Device Dissipation P

D

252 252 mW

Temperature Coefficient of Input Offset Voltage ∆VIO/∆T15 15µV/oC

NOTES:

6. At VO = 26V

, +12V, -14V and RL = 2kΩ.

P-P

7. At RL = 2kΩ.

8. At TA = 85oC.

Electrical Specifications For Equipment Design, at V+ = 5V, V- = 0V, T

= 25oC, Unless Otherwise Specified

A

TYPICAL VALUES

PARAMETER SYMBOL

UNITSCA3240A CA3240

Input Offset Voltage |VIO|2 5mV
Input Offset Current |IIO| 0.1 0.1 pA
Input Current I
Input Resistance R
Large Signal Voltage Gain (See Figures 13, 28) A

I

IN

OL

22pA

11TΩ
100 100 kV/V
100 100 dB

3

CA3240, CA3240A

Electrical Specifications For Equipment Design, at V+ = 5V, V- = 0V, T

= 25oC, Unless Otherwise Specified (Continued)

A

TYPICAL VALUES

PARAMETER SYMBOL

UNITSCA3240A CA3240

Common-Mode Rejection Ratio CMRR 32 32 µV/V

90 90 dB

Common-Mode Input Voltage Range (See Figure 25) V

ICR

-0.5 -0.5 V

2.6 2.6 V

Power Supply Rejection Ratio PSRR 31.6 31.6 µV/V

90 90 dB

Maximum Output Voltage (See Figures 24, 25) VOM+3 3 V

VOM- 0.3 0.3 V

Maximum Output Current Source IOM+20 20mA

Sink IOM-1 1mA
Slew Rate (See Figure 15) SR 7 7 V/µs
Gain Bandwidth Product (See Figure 14) f

T

4.5 4.5 MHz
Supply Current (See Figure 16) I+ 4 4 mA
Device Dissipation P

D

20 20 mW

Test Circuits and Waveforms

50mV/Div., 200ns/Div.

Top Trace: Input, Bottom Trace: Output

Top Trace: Input, Bottom Trace: Output

5V/Div., 1µs/Div.

FIGURE 1A. SMALL SIGNAL RESPONSE FIGURE 1B. LARGE SIGNAL RESPONSE

+15V

10kΩ

+
CA3240

-

-15V

2kΩ

0.05µF

0.1µF

0.1µF

BW (-3dB) = 4.5MHz
SR = 9V/µs

SIMULATED

100pF

LOAD

2kΩ

FIGURE 1C. TEST CIRCUIT

FIGURE 1. SPLIT-SUPPLY VOLTAGE FOLLOWER TEST CIRCUIT AND ASSOCIATED WAVEFORMS

4

Test Circuits and Waveforms (Continued)

R

S

1MΩ

CA3240, CA3240A

+15V

0.01µF

+
CA3240

-

30.1kΩ

NOISE
VOLTAGE
OUTPUT

BW (-3dB) = 140kHz
TOTAL NOISE VOLTAGE
(REFERRED TO INPUT) = 48µV (TYP)

FIGURE 2. TEST CIRCUIT AMPLIFIER (30dB GAIN) USED FOR WIDEBAND NOISE MEASUREMENT

Schematic Diagram (One Amplifier of Two)

BIAS CIRCUIT INPUT STAGE SECOND STAGE OUTPUT STAGE DYNAMIC CURRENT SINK

D

1

Q

2

Q

5

D

3

D

4

R
8K

Q

1

Q

6

Q

7

1

Q

8

D

2

-15V

0.01µF

1kΩ

V+

D

7

R

R
1K

9

50Ω

R

10

Q

19

1K

R

11

20Ω

8

Q

18

Q

3

Q

4

Q

17

Q

R

12

12K

Q

R

13

15K

20

D

8

R

14

20K

21

OUTPUT

INVERTING

NON-INVERTING

INPUT

INPUT

-

Q

+

R

2

500Ω

Q

11

R

4

500Ω

OFFSET NULL (NOTE 9)

NOTES:

9. Only available with 14 Lead DIP (E1 Suffix).

10. All resistance values are in ohms.

5

D

5

Q

10

9

R

3

500Ω

Q

12

R

5

500Ω

C

12pF

1

Q

Q

13

14

R

6

50Ω

Q

Q

16

15

D

R

7

30Ω

6

V-