INA121UA/2K5

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: 1MHz (typical)
• Input Common Mode Voltage Range: ±12V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA121UA/2K5 has a total of 8 pins:

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

Functional Features

• High common-mode rejection ratio (CMRR)
• Low input offset voltage and bias current
• Wide input common-mode 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

Disadvantages

• Limited gain bandwidth product compared to some alternatives
• Non-standard package may require additional adaptation

Working Principles

The INA121UA/2K5 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 gain and accuracy. The input stage provides a high impedance differential input, allowing for precise signal amplification.

Detailed Application Field Plans

The INA121UA/2K5 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 amplification.
3. Test and measurement: Precision instrumentation, strain gauge amplification, and thermocouple amplification.
4. Communication systems: Audio amplification, line drivers, and signal conditioning.

Detailed and Complete Alternative Models

1. AD620: Instrumentation amplifier with higher gain bandwidth product.
2. INA128: Instrumentation amplifier with lower input offset voltage.
3. AD8221: Instrumentation amplifier with rail-to-rail output swing capability.

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

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