INA118P

Product Overview

Category: Integrated Circuit (IC)

Use: The INA118P is a precision instrumentation amplifier designed for accurate signal amplification in various applications. It provides high gain, low noise, and excellent common-mode rejection ratio (CMRR), making it suitable for use in medical equipment, industrial measurement systems, and audio applications.

Characteristics: - High gain - Low noise - Excellent CMRR - Wide input voltage range - Low power consumption

Package: The INA118P is available in an 8-pin plastic dual in-line package (DIP). This package offers good thermal performance and ease of handling during assembly.

Essence: The essence of the INA118P lies in its ability to accurately amplify weak signals while rejecting common-mode noise and interference.

Packaging/Quantity: The INA118P is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Gain Bandwidth Product: 1MHz
• Input Bias Current: 200nA (maximum)
• Common-Mode Rejection Ratio: 100dB (minimum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA118P has eight pins arranged as follows:

```

---

| | | 1 2 3 4| |_______________________|

1. V-
2. IN-
3. REF
4. OUT
5. NC (No Connection)
6. V+
7. IN+
8. NC (No Connection) ```

Functional Features

• High precision amplification of weak signals
• Excellent rejection of common-mode noise
• Low distortion and low noise output
• Wide input voltage range for versatile applications
• Low power consumption for energy efficiency

Advantages and Disadvantages

Advantages: - High gain and accuracy - Excellent rejection of common-mode noise - Versatile input voltage range - Low power consumption

Disadvantages: - Limited bandwidth compared to some other amplifiers - Higher cost compared to basic operational amplifiers

Working Principles

The INA118P is based on the principle of differential amplification. It amplifies the difference between the voltages at its IN+ and IN- inputs while rejecting any common-mode voltage present. This allows it to amplify weak signals accurately, even in the presence of noise or interference.

Application Field Plans

The INA118P finds application in various fields, including:

1. Medical Equipment:

   • Patient monitoring systems
   • Electrocardiography (ECG)
   • Electromyography (EMG)
   • Blood pressure measurement

2. Industrial Measurement Systems:

   • Strain gauge amplification
   • Pressure and temperature sensing
   • Data acquisition systems

3. Audio Applications:

   • Microphone preamplifiers
   • Audio mixers
   • Hi-fi audio amplifiers

Alternative Models

For those seeking alternatives to the INA118P, the following models offer similar functionality:

1. AD620: Precision Instrumentation Amplifier with Low Input Offset Voltage
2. MCP6N11: Zero-Drift Instrumentation Amplifier with EMI Filtering
3. LT1167: Precision Instrumentation Amplifier with Low Noise and Low Power

These alternative models can be considered based on specific requirements and design constraints.

In conclusion, the INA118P is a precision instrumentation amplifier that offers high gain, low noise, and excellent common-mode rejection. Its versatility and accuracy make it suitable for various applications in the medical, industrial, and audio fields.