AD797ARZ

Product Overview

• Category: Integrated Circuit (IC)
• Use: Audio operational amplifier
• Characteristics: High precision, low noise, high bandwidth
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: High-performance audio amplifier
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: ±2.5V to ±18V
• Input Offset Voltage: 1.5mV maximum
• Input Bias Current: 20nA maximum
• Input Voltage Noise: 0.9nV/√Hz typical
• Gain Bandwidth Product: 60MHz typical
• Slew Rate: 20V/µs typical
• Output Current: ±30mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD797ARZ has a total of 8 pins arranged as follows:

```

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| | --| V+ OUT |-- Pin 1: Positive Power Supply --| IN- NC |-- Pin 2: Inverting Input --| IN+ NC |-- Pin 3: Non-Inverting Input --| V- NC |-- Pin 4: Negative Power Supply --| NC NC |-- Pin 5: Not Connected --| NC NC |-- Pin 6: Not Connected --| NC NC |-- Pin 7: Not Connected --| NC NC |-- Pin 8: Not Connected |___________| ```

Functional Features

• Low input offset voltage and bias current for accurate signal amplification.
• High gain bandwidth product enables the amplifier to handle high-frequency signals.
• Low noise performance ensures minimal distortion in audio applications.
• Wide supply voltage range allows flexibility in power supply selection.
• High output current capability enables driving low impedance loads.

Advantages and Disadvantages

Advantages: - High precision amplification for accurate signal reproduction. - Low noise performance ensures high fidelity audio. - Wide supply voltage range allows compatibility with various systems. - High output current capability enables driving demanding loads.

Disadvantages: - Relatively high power consumption compared to some other op-amps. - Limited availability of alternative models with similar specifications.

Working Principles

The AD797ARZ is a voltage-feedback operational amplifier designed for audio applications. It utilizes a combination of high precision circuitry and low noise techniques to provide accurate and clean amplification of audio signals. The amplifier operates by taking the difference between the inverting and non-inverting input voltages and amplifying it with a high gain. The amplified signal is then outputted through the OUT pin. The AD797ARZ requires a dual power supply, with positive and negative voltages, to operate within its specified range.

Detailed Application Field Plans

The AD797ARZ is commonly used in various audio applications, including:

1. Hi-Fi audio systems: The low noise and high precision characteristics make it suitable for amplifying audio signals in high-quality audio systems.
2. Professional audio equipment: The high bandwidth and low distortion performance make it ideal for use in mixers, preamplifiers, and studio equipment.
3. Instrumentation amplifiers: The low offset voltage and bias current make it suitable for precise measurement applications.
4. Active filters: The high gain bandwidth product allows for the design of active filters with excellent frequency response.

Detailed and Complete Alternative Models

While the AD797ARZ is a highly regarded audio operational amplifier, there are alternative models available with similar specifications. Some notable alternatives include:

1. OPA1612: Manufactured by Texas Instruments, this op-amp offers similar low noise and high precision characteristics.
2. LT1028: Produced by Analog Devices, this op-amp provides high performance in terms of low noise and wide bandwidth.
3. NJM2068: Manufactured by New Japan Radio, this op-amp offers a balance between performance and cost-effectiveness.

These alternative models can be considered based on specific application requirements and availability.

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