Intersil Corporation CA3080A, CA3080 Datasheet

CA3080, CA3080A

Data Sheet September 1998 File Number 475.4

2MHz, Operational Transconductance
Amplifier (OTA)

The CA3080 and CA3080A types are Gatable-Gain Blocks
which utilize the unique operational-transconductance­amplifier (OTA) concept described in Application Note
AN6668, “Applications of the CA3080 and CA3080A High­Performance Operational Transconductance Amplifiers”.

The CA3080 and CA3080A types have differential input and a
single-ended, push-pull, class A output. In addition, these types
haveanamplifierbiasinputwhichma ybeused either for gating
or for linear gain control. These types also hav e a high output
impedance and their transconductance (g
proportional to the amplifier bias current (I

) is directly

M

).

ABC

The CA3080 and CA3080A types are notable for their excellent
slew rate (50V/µs), which makes them especially useful for
multiplexer and fast unity-gain voltage followers . These types
are especially applicable for multiple xer applications because
power is consumed only when the devices are in the “ON”
channel state.

The CA3080A’s characteristics are specifically controlled for
applications such as sample-hold, gain-control, multiplexing,
etc.

Ordering Information

PART NUMBER

(BRAND)

CA3080A -55 to 125 8 Pin Metal Can T8.C
CA3080AE -55 to 125 8 Ld PDIP E8.3
CA3080AM

(3080A)
CA3080AM96

(3080A)
CA3080E 0 to 70 8 Ld PDIP E8.3
CA3080M

(3080)
CA3080M96

(3080)

TEMP.

RANGE (oC) PACKAGE

-55 to 125 8 Ld SOIC M8.15

-55 to 125 8 Ld SOIC Tape
and Reel

0 to 70 8 Ld SOIC M8.15

0 to 70 8 Ld SOIC Tape

and Reel

M8.15

M8.15

PKG.

NO.

Features

• Slew Rate (Unity Gain, Compensated). . . . . . . . . . 50V/µs

• Adjustable Power Consumption. . . . . . . . . . . . .10µW to 30µW

• Flexible Supply Voltage Range. . . . . . . . . . . . . ±2V to ±15V

• Fully Adjustable Gain . . . . . . . . . . . . . . . . 0 to g

• Tight g

Spread:

M

MRL

Limit

- CA3080. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2:1

- CA3080A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.6:1

• Extended g

Linearity . . . . . . . . . . . . . . . . . . . 3 Decades

M

Applications

• Sample and Hold • Multiplier

• Multiplexer • Comparator

• Voltage Follower

Pinouts

CA3080

(PDIP, SOIC)

TOP VIEW

NC

INV.

INPUT

NON-INV.

INPUT

INV.
INPUT

NON-INV.
INPUT

1

2

3

4

V-

-

+

CA3080

(METAL CAN)

TOP VIEW

8

1

-

2

+

3

4

V-

TAB

7

5

8

7

6

5

V+

OUTPUT

6

BIAS

NC

V+

OUTPUT
AMPLIFIER

BIAS INPUT

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

CA3080, CA3080A

Absolute Maximum Ratings Thermal Information

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

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V+ to V-

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

Amplifier Bias Current (I

). . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA

ABC

Output Short Circuit Duration (Note 1). . . . . . . . . . . . . No Limitation

Operating Conditions

Temperature Range

CA3080 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 70oC

CA3080A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC

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

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

PDIP Package . . . . . . . . . . . . . . . . . . . 130 N/A

SOIC Package . . . . . . . . . . . . . . . . . . . 170 N/A

Metal Can Package . . . . . . . . . . . . . . . 200 120

Maximum Junction Temperature (Metal Can). . . . . . . . . . . . . . 175oC

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

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

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

(SOIC - Lead Tips Only)

Electrical Specifications For Equipment Design, V

PARAMETER TEST CONDITIONS TEMP

Input Offset Voltage I

Input Offset Voltage Change I
Input Offset Voltage Temp. Drift I
Input Offset Voltage

Sensitivity

Positive I

Negative 25 - - 150 - - 150 µV/V
Input Offset Current I
Input Bias Current I

Differential Input Current I
Amplifier Bias Voltage I
Input Resistance I
Input Capacitance I
Input-to-Output Capacitance I
Common-Mode Input-Voltage

Range
Forward Transconductance

(Large Signal)

Output Capacitance I
Output Resistance I
Peak Output Current I

= 5µA 25 - 0.3 - - 0.3 2 mV

ABC

= 500µA 25 - 0.4 5 - 0.4 2 mV

I

ABC

= 500µA to 5µA 25 - 0.2 - - 0.1 3 mV

ABC

= 100µA Full - - - - 3.0 - µV/oC

ABC

= 500µA 25 - - 150 - - 150 µV/V

ABC

= 500µA 25 - 0.12 0.6 - 0.12 0.6 µΑ

ABC

= 500µA25-25-25µA

ABC

= 0, V

ABC

= 500µA 25 - 0.71 - - 0.71 - V

ABC

= 500µA 25 10 26 - 10 26 - kΩ

ABC

= 500µA, f = 1MHz 25 - 3.6 - - 3.6 - pF

ABC

= 500µA, f = 1MHz 25 - 0.024 - - 0.024 - pF

ABC

= 500µA 25 12 to

I

ABC

= 500µA 25 6700 9600 13000 7700 9600 12000 µS

I

ABC

= 500µA, f = 1MHz 25 - 5.6 - - 5.6 - pF

ABC

= 500µA 25 - 15 - - 15 - MΩ

ABC

= 5µA, RL = 0Ω 25 - 5 - 3 5 7 µA

ABC

= 500µA, RL = 0Ω 25 350 500 650 350 500 650 µA

I

ABC

= 4V 25 - 0.008 - - 0.008 5 nA

DIFF

= ±15V, Unless Otherwise Specified

SUPPLY

CA3080 CA3080A

Full - - 6 - - 5 mV

Full - - 7 - - 15 µA

-12

13.6 to

-14.6

- 12 to

-12

13.6 to

-14.6

Full 5400 - - 4000 - - µS

Full 300 - - 300 - - µA

UNITSMIN TYP MAX MIN TYP MAX

-V

2

CA3080, CA3080A

Electrical Specifications For Equipment Design, V

= ±15V, Unless Otherwise Specified (Continued)

SUPPLY

CA3080 CA3080A

Peak Output
Voltage

PARAMETER TEST CONDITIONS TEMP

Positive I

= 5µA, RL = ∞ 25 - 13.8 - 12 13.8 - V

ABC

Negative 25 - -14.5 - -12 -14.5 - V

Positive I

= 500µA, RL = ∞ 25 12 13.5 - 12 13.5 - V

ABC

UNITSMIN TYP MAX MIN TYP MAX

Negative 25 -12 -14.4 - -12 -14.4 - V
Amplifier Supply Current I
Device Dissipation I

Magnitude of Leakage Current

Propagation Delay I
Common-Mode Rejection Ratio I
Open-Loop Bandwidth I

= 500µA 25 0.8 1 1.2 0.8 1 1.2 mA

ABC

= 500µA25243036243036mW

ABC

= 0, VTP = 0 25 - 0.08 - - 0.08 5 nA

I

ABC

I

= 0, VTP = 36V 25 - 0.3 - - 0.3 5 nA

ABC

= 500µA 25 - 45 - - 45 - ns

ABC

= 500µA 25 80 110 - 80 110 - dB

ABC

= 500µA 25 - 2 - - 2 - MHz

ABC

Slew Rate Uncompensated 25 - 75 - - 75 - V/µs

Compensated 25 - 50 - - 50 - V/µs

Schematic Diagram

+

7

V

9

OUTPUT

6

10

V-

4

INVERTING
INPUT

NON­INVERTING
INPUT

AMPLIFIER
BIAS INPUT

D

Q6Q

3

7

D

4

Q

4

D

2

Q

5

2

Q

Q

1

2

3

5

Q

3

D

1

D

3

Q

Q

8

Q

Q

11

D

6

Typical Applications

V+ = 15V

51Ω

10kΩ

300Ω

0.01µF

3

390pF

2

10kΩ

0.001µF

7

+

CA3080, A

-

4

V- = -15V

5

0.01µF

62kΩ

LOAD

(SCOPE PROBE)

6

1MΩ

5pF

OUTPUT

1V/DIV.

INPUT

5V/DIV.

FIGURE 1. SCHEMATIC DIAGRAM OF THE CA3080 AND CA3080A IN A UNITY-GAIN VOLTAGE FOLLOWER CONFIGURATION AND

ASSOCIATED WAVEFORM

3

VS = ±15V

TIME (0.1µs/DIV.)

Typical Applications (Continued)

20pF

8.2kΩ

CA3080, CA3080A

VOLTAGE-CONTROLLED

CURRENT SOURCE

1kΩ

1kΩ

7.5V +7.5V

+7.5V

10kΩ 6.2kΩ 500Ω

3

2

2MΩ

SYMMETRY

100kΩ

MAX FREQ. SET

430pF

10kΩ

4 - 60

2kΩ

HIGH-FREQ.

LEVEL

ADJUST

CENTERING

100kΩ

6.8MΩ

C

4

2

3

+7.5V

7

+

CA3080A

-

5

4.7kΩ

FREQ.

ADJUST

6

4

-7.5V

EXTERNAL
SWEEPING INPUT

MIN FREQ. SET

-7.5V

500Ω

0.9 - 7pF
C

1

6.2kΩ

10 - 80pF
C

2

BUFFER VOLTAGE

FOLLOWER

HIGH­FREQ.
SHAPE

+

3

4 - 60pF
C

CA3160

3

-

2

+7.5V

7

4

-7.5V

0.1µF

6

0.1
µF

FIGURE 2. 1,000,000/1 SINGLE-CONTROL FUNCTION GENERATOR - 1MHz TO 1Hz

THRESHOLD

DETECTOR

+7.5V-7.5V

30kΩ

5

-

CA3080

+

50kΩ

C

5

15 - 115

7

4

10kΩ

+7.5V

6

-7.5V

2-1N914

NOTE: A Square-Wave Signal Modulates The External Sweeping
Input to Produce 1Hz and 1MHz, showing the 1,000,000/1 frequency
range of the function generator.

FIGURE 3A. TWO-TONE OUTPUT SIGNAL FROM THE

FUNCTION GENERATOR

FIGURE 3. FUNCTION GENERATOR DYNAMIC CHARACTERISTICS WAVEFORMS

4

NOTE: The bottom trace is the sweeping signal and the top tr ace is
theactual generatoroutput. The center trace displaysthe 1MHz signal
via delayed oscilloscope triggering of the upper swept output signal.

FIGURE 3B. TRIPLE-TRACE OF THE FUNCTION GENERATOR

SWEEPING TO 1MHz