INA114APG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Instrumentation Amplifier
• Characteristics: High precision, low noise, high common-mode rejection ratio (CMRR)
• Package: PDIP (Plastic Dual In-Line Package)
• Essence: Amplification of small differential signals with high accuracy and rejection of common-mode noise
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Input Bias Current: 0.5nA (maximum)
• Gain Bandwidth Product: 1MHz (typical)
• Input Common-Mode Voltage Range: -Vs + 1.8V to +Vs - 1.8V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA114APG4 has a total of 16 pins arranged as follows:

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| | | 1 8 | | / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |_________| | |_______________________| ```

Functional Features

• High input impedance
• Low output impedance
• Adjustable gain
• Excellent linearity
• Wide bandwidth
• Low power consumption

Advantages and Disadvantages

Advantages: - High precision amplification - Low noise performance - High rejection of common-mode noise - Versatile gain adjustment

Disadvantages: - Limited supply voltage range - Relatively high cost compared to basic operational amplifiers

Working Principles

The INA114APG4 is an instrumentation amplifier that amplifies small differential signals while rejecting common-mode noise. It consists of three operational amplifiers and precision resistors. The input signal is applied to the non-inverting terminal of the first operational amplifier, while the inverting terminal receives a reference voltage. The second operational amplifier amplifies the difference between the two inputs, and the third operational amplifier provides additional gain and output buffering.

Detailed Application Field Plans

The INA114APG4 finds applications in various fields, including:

1. Biomedical instrumentation: Used for amplifying weak bioelectric signals in ECG, EEG, and EMG measurements.
2. Industrial process control: Provides accurate amplification of sensor signals in temperature, pressure, and flow measurement systems.
3. Strain gauge amplification: Enables precise measurement of strain in structural engineering and material testing.
4. Data acquisition systems: Amplifies low-level signals from sensors in applications such as data logging and monitoring.
5. Audio equipment: Enhances audio signals in professional audio systems and high-fidelity audio amplifiers.

Detailed and Complete Alternative Models

1. AD620: Instrumentation amplifier with similar specifications and pin configuration.
2. INA128: Higher precision instrumentation amplifier with lower offset voltage.
3. AD8221: Low power instrumentation amplifier with rail-to-rail input/output capability.
4. LT1167: Precision instrumentation amplifier with wide supply voltage range.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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