CA3280AE Intersil Corporation, CA3280AE Datasheet

CA3280AE

Manufacturer Part Number

CA3280AE

Description

Manufacturer

Intersil Corporation

Datasheet

1.CA3280AE.pdf (10 pages)

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Dual, 9MHz, Operational

Transconductance Ampliﬁer (OTA)

The CA3280 and CA3280A types consist of two variable

operational amplifiers that are designed to substantially reduce

the initial input offset voltage and the offset voltage variation

with respect to changes in programming current. This design

results in reduced “AGC thump,” an objectionable characteristic

of many AGC systems. Interdigitation, or crosscoupling, of

critical portions of the circuit reduces the amplifier dependence

upon thermal and processing variables.

The CA3280 has all the generic characteristics of an

operational voltage amplifier except that the forward transfer

characteristics is best described by transconductance rather

than voltage gain, and the output is current, not voltage. The

magnitude of the output current is equal to the product of

transconductance and the input voltage. This type of

operational transconductance amplifier was first introduced in

1969, and it has since gained wide acceptance as a gateable,

gain controlled building block for instrumentation and audio

applications, such as linearization of transducer outputs,

standardization of widely changing signals for data processing,

multiplexing, instrumentation amplifiers operating from the

nanopower range to high current and high speed comparators.

For additional application information on this device and on

OTAs in general, please refer to Application Notes: AN6818,

AN6668, and AN6077.

Pinout

EMITTER, A1

EMITTER, A2

ABC

, A1

, A2

, A1

, A2

V-

(PDIP, CERDIP)

TOP VIEW

CA3280

Data Sheet

+IN, A1

-IN, A1

V+, A1

OUT, A1

OUT, A2

V+, A2

-IN, A2

+IN, A2

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

Features

• Low Initial Input Offset Voltage: 500 V (Max) (CA3280A)

• Low Offset Voltage Change vs I

• Low Offset Voltage Drift: 5 V/

• Excellent Matching of the Two Ampliﬁers for All

• Internal Current-Driven Linearizing Diodes Reduce the

• Flexible Supply Voltage Range. . . . . . . . . . .

Applications

• Voltage Controlled Ampliﬁers

• Voltage Controlled Oscillators

• Multipliers

• Demodulators

• Sample and Hold

• Instrumentation Ampliﬁers

• Function Generators

• Triangle Wave-to-Sine Wave Converters

• Comparators

• Audio Preampliﬁer

Ordering Information

CA3280AE

CA3280E

CA3280AF3

1-888-INTERSIL or 321-724-7143

PART NUMBER

for All Types

Characteristics

External Input Current to an Offset Component

September 1998

RANGE (

-55 to 125

TEMP.

0 to 70

CA3280, CA3280A

C (Max) (CA3280A)

16 Ld PDIP

16 Ld CERDIP

File Number 1174.4

ABC

PACKAGE

: <500 V (Typ)

Intersil Corporation 1999

2V to 15V

E16.3

F16.3

PKG.

NO.

Related parts for CA3280AE

CA3280AE Summary of contents

Page 1

... Multipliers • Demodulators • Sample and Hold • Instrumentation Ampliﬁers • Function Generators • Triangle Wave-to-Sine Wave Converters • Comparators • Audio Preampliﬁer Ordering Information PART NUMBER CA3280AE +IN, A1 CA3280E -IN, A1 V+, A1 CA3280AF3 OUT, A1 OUT, A2 V+, A2 -IN, A2 +IN, A2 CAUTION: These devices are sensitive to electrostatic discharge ...

Page 2

Functional Diagram . 1/2 CA3280 - CA3280, CA3280A ...

Page 3

Absolute Maximum Ratings Supply Voltage (Between V+ and V-). . . . . . . . . . . . . . . . . . . . +36V Differential Input Voltage . . . . . . . . ...

Page 4

Electrical Speciﬁcations For Equipment Design PARAMETER SYMBOL Peak Output Current Sink and I OM Source I OM Linearization Diodes Offset Current Dynamic Impedance Diode Network Supply Current Amplifier Supply Current (Per Amplifier) Amplifier Output Leakage Current Common Mode ...

Page 5

Test Circuits and Waveforms V+ 15V 14 10k 16 1/2 CA3280 10k ABC I DIODE FIGURE 3A. EFFECTS OF DIODE LINEARIZATION, WITH DIODE PROGRAMMING TERMINAL ACTIVE 11 10k 9 1/2 CA3280 10k ...

Page 6

CA3280. The linearization diode impedance also decreases as the diode bias current increases, which further loads the input. The diodes, in addition to acting as a linearization network, also operate as an additional attenuation system to accommodate input ...

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CA3280AE Intersil Corporation, CA3280AE Datasheet

CA3280AE

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CA3280AE Summary of contents

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