AD8221BR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Amplifier
• Characteristics: High precision, low noise, low power consumption
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Instrumentation amplifier
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: ±2.3V to ±18V
• Input Offset Voltage: 50µV maximum
• Input Bias Current: 5nA maximum
• Gain Bandwidth Product: 1MHz typical
• Common Mode Rejection Ratio: 114dB minimum
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AD8221BR has the following pin configuration:

```

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| | --| IN+ OUT|-- --| IN- VS+|-- --| REF VS-|-- --| GND NC|-- |___________| ```

Functional Features

• High precision amplification of differential input signals
• Low noise and distortion for accurate signal processing
• Wide supply voltage range for versatile applications
• Excellent common mode rejection ratio for rejecting common noise
• Low power consumption for energy-efficient operation

Advantages and Disadvantages

Advantages: - High precision amplification - Low noise and distortion - Wide supply voltage range - Excellent common mode rejection ratio

Disadvantages: - Limited gain bandwidth product compared to some alternatives - Higher cost compared to basic operational amplifiers

Working Principles

The AD8221BR is an instrumentation amplifier that amplifies the difference between its two input signals while rejecting common-mode noise. It consists of three operational amplifiers configured in a specific manner to achieve high precision amplification. The input signals are amplified by a fixed gain set by external resistors, providing accurate signal processing.

Application Field Plans

The AD8221BR is widely used in various applications that require high precision amplification and rejection of common-mode noise. Some of the detailed application fields include:

1. Biomedical instrumentation: ECG (Electrocardiogram), EEG (Electroencephalogram), and EMG (Electromyogram) measurements.
2. Industrial process control: Signal conditioning for temperature, pressure, and flow sensors.
3. Strain gauge amplification: Precise measurement of mechanical strain in structural analysis.
4. Data acquisition systems: Amplification of low-level signals from sensors for accurate data capture.
5. Audio equipment: High-fidelity audio amplification for professional audio systems.

Alternative Models

• AD620: Low power, low cost instrumentation amplifier with a gain range of 1 to 1000.
• INA128: Precision instrumentation amplifier with a wide supply voltage range and high common mode rejection ratio.
• AD8421: Ultra-low noise instrumentation amplifier with excellent DC performance.

These alternative models provide similar functionality to the AD8221BR and can be considered based on specific application requirements.

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