CA3280E

Product Overview

Category: Integrated Circuit (IC)

Use: The CA3280E is a versatile integrated circuit that finds application in various electronic devices. It is primarily used as a voltage-controlled amplifier (VCA) and transconductance amplifier (OTA).

Characteristics: - High gain and low noise - Wide dynamic range - Low distortion - Temperature stability - Versatile control options

Package: The CA3280E is available in a standard 16-pin dual in-line package (DIP).

Essence: This IC serves as a key component in audio processing circuits, providing amplification and modulation capabilities.

Packaging/Quantity: The CA3280E is typically sold individually or in small quantities, packaged in anti-static tubes or trays to ensure safe handling and storage.

Specifications

• Supply Voltage: ±15V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 100nA (maximum)
• Gain Bandwidth Product: 1MHz (typical)
• Output Voltage Swing: ±12V (minimum)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CA3280E features a 16-pin DIP package with the following pin configuration:

1. Control Voltage Inverting Input (-VIN)
2. Control Voltage Non-Inverting Input (+VIN)
3. Transconductance Amplifier Output (OUT)
4. Transconductance Amplifier Inverting Input (-IN)
5. Transconductance Amplifier Non-Inverting Input (+IN)
6. Nulling Resistor Terminal (NULL)
7. Ground (GND)
8. Ground (GND)
9. Positive Supply Voltage (+VCC)
10. Positive Supply Voltage (+VCC)
11. Buffer Amplifier Output (BUF OUT)
12. Buffer Amplifier Inverting Input (BUF -IN)
13. Buffer Amplifier Non-Inverting Input (BUF +IN)
14. Control Voltage Output (CV OUT)
15. Control Voltage Inverting Input (CV -IN)
16. Control Voltage Non-Inverting Input (CV +IN)

Functional Features

The CA3280E offers the following functional features:

• Voltage-controlled amplification
• Transconductance amplification
• Buffer amplifier for signal conditioning
• Control voltage input and output for modulation
• Nulling resistor terminal for fine-tuning

Advantages and Disadvantages

Advantages: - High gain and low noise performance - Wide dynamic range suitable for audio applications - Temperature stability ensures reliable operation in various environments - Versatile control options allow for flexible circuit design

Disadvantages: - Limited gain bandwidth product compared to some modern alternatives - Availability may be limited due to its older design

Working Principles

The CA3280E operates based on the principles of voltage-controlled amplification and transconductance amplification. It utilizes internal circuitry to convert control voltages into corresponding amplification levels, allowing precise control over the output signal.

Detailed Application Field Plans

The CA3280E is commonly used in the following application fields:

1. Audio processing equipment, such as mixers, equalizers, and compressors.
2. Synthesizers and electronic musical instruments.
3. Analog modulation circuits for communication systems.
4. Industrial control systems requiring voltage-controlled amplification.

Detailed and Complete Alternative Models

While the CA3280E has been widely used in the past, there are alternative models available today that offer similar functionality. Some popular alternatives include:

1. AS3360: A dual OTA with extended temperature range and improved specifications.
2. LM13700: A versatile dual OTA with additional features like current mirrors and buffers.
3. SSM2164: A quad VCA with low distortion and high dynamic range.

These alternative models provide similar functionality to the CA3280E and may offer improved performance in certain aspects.

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