INA122UA/2K5G4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Instrumentation Amplifier
• Characteristics: High precision, low noise, low power consumption
• Package: SOIC-8
• Essence: The INA122UA/2K5G4 is a high-precision instrumentation amplifier designed for accurate signal amplification 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: ±10nA (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/2K5G4 has a total of 8 pins:

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

Functional Features

• High common-mode rejection ratio (CMRR) of 120dB (minimum)
• Low input offset voltage and bias current for accurate amplification
• Wide supply voltage range allows flexibility in different applications
• Low quiescent current for power-efficient operation
• Rail-to-rail output swing for maximum dynamic range

Advantages and Disadvantages

Advantages: - High precision amplification - Low noise performance - Wide operating temperature range - Flexible supply voltage options

Disadvantages: - Limited availability in large quantities - Relatively higher cost compared to some alternatives

Working Principles

The INA122UA/2K5G4 is based on the instrumentation amplifier architecture, which provides high gain and excellent common-mode rejection. It consists of a differential input stage, a gain stage, and an output buffer. The input stage amplifies the differential voltage while rejecting common-mode signals. The gain stage further amplifies the signal, and the output buffer provides a low impedance output.

Detailed Application Field Plans

The INA122UA/2K5G4 finds applications in various fields, including:

1. Medical equipment: ECG amplification, patient monitoring systems
2. Industrial automation: Process control, data acquisition systems
3. Precision measurement: Strain gauge amplification, temperature sensing
4. Audio equipment: Microphone preamplifiers, audio mixers

Detailed and Complete Alternative Models

1. AD620: Low-cost instrumentation amplifier with similar specifications
2. INA128: Higher precision instrumentation amplifier with lower noise performance
3. AD8221: Instrumentation amplifier with rail-to-rail input and output capabilities

These alternative models offer different trade-offs in terms of cost, performance, and features, allowing users to choose the most suitable option for their specific application.

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