CA3280 Transconductance Amplifier – Datasheet

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The CA3280 IC consists of two op-amps, configured to substantially reduce the initial offset voltage variation while keeping in check the offset voltage variation with respect to the changes in coded current. The IC has offers a wide variety of features such as high noise immunity and ESD protection, etc. CA3280 is widely accepted as the base standard for instrumentation and audio applications, such as linearization of transducer outputs.

Operational Transconductance Amplifier (OTA)

Operational transconductance amplifier is basically an amplifier, that produces an output current, when a differential input voltage is applied. It is also known as a voltage to current converter. OTA amplifiers are similar to general amplifier, with the only difference being that an OTA has a high impedance differential input stage, that may be used with negative feedback.

CA3280 Pinout

CA3280 Pin Configuration

Pin NoPin NameDescription
1ID, A1Input Current A1
2EMITTER, A1Emitter Current A1
3IABC, A1Amplifier Bias Current A1
4V-Negative Power Supply
5NCNo Connection
6IABC, A2Amplifier Bias Current A2
7EMITTER, A2Emitter Current A2
8ID, A2Input Current A2
9+IN, A2Non Inverting Amplifier A2
10-IN, A2Inverting Amplifier A2
11V+, A2Positive Power Supply A2
12OUT, A2Output Pin A2
13OUT, A1Output Pin A1
14V+, A1Positive Power Supply A1
15-IN, A1Inverting Amplifier A1
16+IN, A1Non Inverting Amplifier A1

How To Use CA3280

The above circuit represents the function of the CA3280 in a channel separation test. For this, provide a non – inverting input (op-amp 1) on pin 16 of the IC, while keeping the inverting input at GND. Provide an appropriate Vcc and Vss on pins 14 and 4 of the IC. The amplifier output of the circuit can be taken to an oscilloscope through pin 13 of the IC.

CA3280 Features and Specifications

  • Low Initial Input Offset Voltage: 500µV (Max) (CA3280A)
  • Low Offset Voltage Change vs IABC: <500µV (Typ) for All Types
  • Low Offset Voltage Drift: 5µV/oC (Max) (CA3280A)
  • Excellent Matching of the Two Amplifiers for All Characteristics
  • Internal Current-Driven Linearizing Diodes Reduce the External Input Current to an Offset Component

Application

  • Voltage Controlled Amplifiers
  • Voltage Controlled Oscillators
  • Multipliers
  • Demodulators
  • Sample and Hold
  • Instrumentation Amplifiers
  • Function Generators
  • Triangle Wave-to-Sine Wave Converters
  • Comparators
  • Audio Preamplifier

CA3280 Datasheet

You can download this datasheet forCA3280 Transconductance Amplifier from the link given below:

See Also: CD4059 Programmable Divide-by-N Counter – Datasheet | CD4098 CMOS/MOS Dual Monostable Multivibrator – Datasheet | CD4060 14-Stage Ripple-Carry Binary Counter -Datasheet