INA125UA/2K5

Product Overview

• Category: Integrated Circuit (IC)
• Use: Instrumentation Amplifier
• Characteristics: High precision, low noise, low power consumption
• Package: SOIC-8
• Essence: Amplification of small differential input signals with high accuracy and stability
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: ±2.25V to ±18V
• Input Offset Voltage: ±150µV (maximum)
• Input Bias Current: ±100nA (maximum)
• Gain Bandwidth Product: 200kHz (typical)
• Input Common Mode Voltage Range: -Vs + 1.9V to +Vs - 1.9V
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA125UA/2K5 has a total of 8 pins arranged as follows:

```

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| | --| V+ OUT |-- --| V- REF |-- --| RG IN- |-- --| RL IN+ |-- --| GND |-- |___________| ```

• V+: Positive supply voltage
• V-: Negative supply voltage
• OUT: Output pin
• REF: Reference voltage
• RG: Gain resistor connected to the inverting input (IN-)
• RL: Load resistor connected to the non-inverting input (IN+)
• GND: Ground reference

Functional Features

• High common-mode rejection ratio (CMRR) of 86dB (minimum)
• Low input offset voltage drift of 0.3µV/°C (typical)
• Low quiescent current of 350µA (typical)
• Wide input common-mode voltage range
• High gain accuracy and stability

Advantages and Disadvantages

Advantages: - High precision amplification of small differential signals - Low noise performance - Low power consumption - Wide operating temperature range

Disadvantages: - Limited gain bandwidth product compared to some alternative models - Requires external resistors for setting the gain

Working Principles

The INA125UA/2K5 is an instrumentation amplifier that amplifies small differential input signals with high accuracy. It consists of three operational amplifiers and precision resistors. The input signal is amplified by a programmable gain set by external resistors connected to the RG and RL pins. The amplified output is then available at the OUT pin.

Detailed Application Field Plans

The INA125UA/2K5 is commonly used in various applications, including:

1. Strain gauge amplification in load cells and force sensors
2. Thermocouple and RTD signal conditioning
3. Biomedical instrumentation
4. Industrial process control
5. Data acquisition systems
6. Bridge amplification in pressure and level sensors

Detailed and Complete Alternative Models

Some alternative models to the INA125UA/2K5 include:

1. AD8221 - Instrumentation Amplifier with Rail-to-Rail Output
2. MCP6N11 - Zero-Drift Instrumentation Amplifier
3. LT1167 - Precision Instrumentation Amplifier
4. MAX4209 - Low-Noise, Low-Power Instrumentation Amplifier

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

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