INA122UA/2K5

Product Overview

• Category: Integrated Circuit (IC)
• Use: Instrumentation Amplifier
• Characteristics: High precision, low noise, low power consumption
• Package: SOIC-8
• Essence: The INA122UA/2K5 is a high-performance instrumentation amplifier designed for precise amplification of low-level signals in various applications.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: ±2.25V to ±18V
• Input Offset Voltage: ±50µV (maximum)
• Input Bias Current: ±1nA (maximum)
• Gain Bandwidth Product: 700kHz (typical)
• Input Common-Mode Voltage Range: -Vs + 1.9V to +Vs - 1.2V
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The INA122UA/2K5 has the following pin configuration:

1. V+
2. V-
3. REF
4. RG
5. OUT
6. NC
7. NC
8. GND

Functional Features

• High common-mode rejection ratio (CMRR) of 120dB (minimum)
• Low input offset voltage and bias current for accurate signal amplification
• Wide supply voltage range allows flexibility in various applications
• Low quiescent current consumption for power efficiency
• Internal EMI filtering for improved noise performance

Advantages and Disadvantages

Advantages: - High precision amplification of low-level signals - Excellent common-mode rejection for noise reduction - Wide operating temperature range for versatile usage - Compact SOIC-8 package for space-constrained designs

Disadvantages: - Limited gain bandwidth product compared to some alternative models - Requires external components for proper operation

Working Principles

The INA122UA/2K5 is based on the instrumentation amplifier architecture, which provides high gain and common-mode rejection. It consists of three operational amplifiers and precision resistors that form a differential amplifier with adjustable gain. The input signal is amplified differentially, rejecting common-mode noise, and the output is obtained from the third operational amplifier.

Detailed Application Field Plans

The INA122UA/2K5 can be used in various applications, including but not limited to: 1. Medical equipment: ECG amplification, patient monitoring systems 2. Industrial process control: Sensor signal conditioning, data acquisition systems 3. Precision measurement instruments: Strain gauge amplification, bridge circuits 4. Audio equipment: Microphone preamplifiers, audio signal conditioning

Detailed and Complete Alternative Models

1. AD8221: Instrumentation Amplifier, gain up to 1000, wide supply voltage range
2. LTC2050: Zero-drift Instrumentation Amplifier, ultra-low offset voltage, low power consumption
3. INA128: Precision Instrumentation Amplifier, high CMRR, low noise

These alternative models offer similar functionality and can be considered as alternatives to the INA122UA/2K5 depending on specific requirements and design constraints.

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