INA155UA

Product Overview

Category: Integrated Circuit (IC)

Use: The INA155UA is a high-speed, precision instrumentation amplifier designed for use in various applications that require accurate signal amplification and conditioning. It is commonly used in industrial automation, medical equipment, and scientific research.

Characteristics: - High gain accuracy - Low offset voltage - Wide bandwidth - Low noise - High common-mode rejection ratio (CMRR) - Rail-to-rail input and output

Package: The INA155UA is available in a small outline integrated circuit (SOIC) package, which provides ease of integration into electronic circuits.

Essence: The essence of the INA155UA lies in its ability to amplify weak signals accurately while rejecting common-mode noise and maintaining high precision.

Packaging/Quantity: The INA155UA is typically sold in reels or tubes containing a specified quantity of ICs, usually ranging from 100 to 1000 units per package.

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Gain Bandwidth Product: 1.5MHz
• Input Bias Current: 10nA (maximum)
• Common-Mode Rejection Ratio: 120dB (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The INA155UA has eight pins arranged as follows:

```

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| | --| V+ OUT |-- --| IN+ REF |-- --| IN- GND |-- --| RG V- |-- --| SET | --| NC | |___________| ```

1. V+: Positive power supply pin.
2. OUT: Amplified output signal.
3. IN+: Non-inverting input.
4. REF: Reference voltage input.
5. IN-: Inverting input.
6. GND: Ground reference.
7. RG: Gain-setting resistor connection.
8. V-: Negative power supply pin.
9. SET: External gain setting pin (optional).
10. NC: No connection.

Functional Features

1. High Gain Accuracy: The INA155UA provides precise amplification of weak signals with minimal gain error.
2. Low Offset Voltage: The low offset voltage ensures accurate signal conditioning and minimizes measurement errors.
3. Wide Bandwidth: The amplifier has a wide bandwidth, allowing it to handle high-frequency signals accurately.
4. Low Noise: The INA155UA exhibits low noise characteristics, making it suitable for applications requiring high signal fidelity.
5. High CMRR: The high common-mode rejection ratio enables the amplifier to reject common-mode noise and interference effectively.
6. Rail-to-Rail Input and Output: The amplifier supports input and output signals that can swing close to the supply rails, maximizing dynamic range.

Advantages and Disadvantages

Advantages: - High precision amplification - Wide operating temperature range - Low noise performance - Excellent common-mode rejection - Versatile application possibilities

Disadvantages: - Relatively higher cost compared to basic operational amplifiers - Requires external gain-setting resistor for precise gain control

Working Principles

The INA155UA operates based on the principles of differential amplification. It amplifies the difference between the non-inverting (IN+) and inverting (IN-) inputs while rejecting common-mode signals. The gain of the amplifier can be set using an external gain-setting resistor (RG) or by utilizing the optional SET pin.

Detailed Application Field Plans

The INA155UA finds extensive use in various applications, including but not limited to: - Industrial process control systems - Medical instrumentation and patient monitoring devices - Precision data acquisition systems - Strain gauge amplification circuits - Thermocouple signal conditioning - Bridge sensor amplification

Detailed and Complete Alternative Models

1. AD8221: Precision Instrumentation Amplifier with Rail-to-Rail Output
2. INA114AP: High-Speed, Low-Noise Instrumentation Amplifier
3. LTC6915: Precision, Low Noise, Programmable Gain Instrumentation Amplifier
4. MCP6N11: Zero-Drift, Low-Noise Instrumentation Amplifier
5. MAX4460: Ultra-Low Noise, Precision Instrumentation Amplifier

These alternative models offer similar functionality and can be considered as alternatives to the INA155UA based on specific application requirements.

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