INA111AU/1KE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Amplifier
• Characteristics: High precision, low noise, low power consumption
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Instrumentation amplifier
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: ±2.25V to ±18V
• Input Offset Voltage: ±150µV (maximum)
• Input Bias Current: ±50nA (maximum)
• Gain Bandwidth Product: 200kHz (typical)
• Input Common-Mode Voltage Range: -Vs + 1.8V to +Vs - 1.8V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The INA111AU/1KE4 has a total of 8 pins:

1. Pin 1: Non-Inverting Input (+IN)
2. Pin 2: Inverting Input (-IN)
3. Pin 3: Output (OUT)
4. Pin 4: Negative Supply Voltage (-Vs)
5. Pin 5: Null
6. Pin 6: Positive Supply Voltage (+Vs)
7. Pin 7: Null
8. Pin 8: Null

Functional Features

• High common-mode rejection ratio (CMRR)
• Low input offset voltage and bias current
• Wide supply voltage range
• Rail-to-rail output swing capability
• Low quiescent current

Advantages and Disadvantages

Advantages

• High precision amplification
• Low noise performance
• Suitable for low-power applications
• Wide operating temperature range
• Versatile and flexible in various circuit designs

Disadvantages

• Limited gain bandwidth product compared to some alternatives
• Higher cost compared to basic operational amplifiers

Working Principles

The INA111AU/1KE4 is an instrumentation amplifier designed to amplify small differential signals while rejecting common-mode noise. It consists of three operational amplifiers and precision resistors that provide high accuracy and stability. The input stage provides high input impedance, while the output stage delivers a low output impedance.

Detailed Application Field Plans

The INA111AU/1KE4 is commonly used in various applications, including:

1. Medical equipment: ECG (Electrocardiogram), EEG (Electroencephalogram), and EMG (Electromyography) devices.
2. Industrial automation: Process control systems, data acquisition, and sensor signal conditioning.
3. Test and measurement equipment: Precision voltage/current measurements, strain gauge amplification, and thermocouple amplification.
4. Communication systems: Audio signal amplification and filtering.

Detailed and Complete Alternative Models

1. AD620: Instrumentation amplifier with similar specifications and performance.
2. INA114: Higher precision instrumentation amplifier with lower offset voltage.
3. AD8221: Low power instrumentation amplifier with rail-to-rail output swing capability.

Note: This is not an exhaustive list, and there are several other alternative models available in the market.

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