INA125PG4

Product Overview

Category: Integrated Circuit (IC)

Use: The INA125PG4 is a precision instrumentation amplifier designed for accurate signal amplification in various applications. It provides high gain, low noise, and excellent common-mode rejection ratio (CMRR).

Characteristics: - High gain accuracy - Low offset voltage - Low input bias current - Wide supply voltage range - Rail-to-rail output swing capability

Package: DIP-8 (Dual In-Line Package 8)

Essence: The INA125PG4 is an essential component in precision measurement systems where accurate amplification of small signals is required.

Packaging/Quantity: The INA125PG4 is typically sold in reels or tubes containing 250 units per package.

Specifications

• Supply Voltage Range: ±2.25V to ±18V
• Input Offset Voltage: 50µV (maximum)
• Input Bias Current: 0.5nA (maximum)
• Gain Bandwidth Product: 1MHz
• Common-Mode Rejection Ratio (CMRR): 120dB (minimum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The INA125PG4 has the following pin configuration:

```

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

Pin Description: - V+: Positive Power Supply - OUT: Amplified Output Signal - IN+: Non-Inverting Input - REF: Reference Voltage - IN-: Inverting Input - GND: Ground - RG: Gain Setting Resistor - V-: Negative Power Supply

Functional Features

• High gain accuracy ensures precise amplification of small signals.
• Low offset voltage minimizes errors in signal measurement.
• Low input bias current reduces the impact on the measured signal.
• Wide supply voltage range allows flexibility in system design.
• Rail-to-rail output swing capability enables full utilization of the supply voltage range.

Advantages and Disadvantages

Advantages: - High gain accuracy for precise signal amplification. - Low noise and excellent CMRR for accurate measurements. - Wide supply voltage range provides flexibility in system design. - Rail-to-rail output swing capability maximizes signal dynamic range.

Disadvantages: - Limited bandwidth compared to some specialized amplifiers. - Requires external gain setting resistor for proper operation.

Working Principles

The INA125PG4 is based on the principle of an instrumentation amplifier, which amplifies the difference between the non-inverting (IN+) and inverting (IN-) inputs. It utilizes a precision operational amplifier and internal feedback resistors to achieve high gain and accuracy. The gain can be set externally using the RG resistor.

Detailed Application Field Plans

The INA125PG4 finds applications in various fields, including but not limited to: 1. Medical equipment: ECG (Electrocardiogram), EEG (Electroencephalogram), and EMG (Electromyogram) amplification. 2. Industrial process control: Amplification of sensor signals for monitoring and control systems. 3. Weighing scales: Precise measurement of weight by amplifying load cell signals. 4. Strain gauge amplification: Accurate measurement of strain in structural analysis and material testing. 5. Data acquisition systems: Signal conditioning and amplification for accurate data acquisition.

Detailed and Complete Alternative Models

Some alternative models to the INA125PG4 include: 1. AD620: Precision Instrumentation Amplifier with similar characteristics and pin configuration. 2. MCP6N11: Low-Noise Instrumentation Amplifier with rail-to-rail output swing capability. 3. LT1167: Precision Instrumentation Amplifier with high CMRR and low offset voltage.

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

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