Overview
The INA125PAG4 is a high-performance instrumentation amplifier produced by Texas Instruments. This device is designed to provide complete bridge excitation and precision differential-input amplification on a single integrated circuit. It is characterized by its low power consumption, high accuracy, and versatility in various applications. The INA125PAG4 operates on a wide supply range, from single supply (2.7V to 36V) to dual supply (±1.35V to ±18V), making it suitable for a broad range of systems. The amplifier features a precision voltage reference, which is externally adjustable, and a sleep mode to save power during idle periods.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Bandwidth at Min Gain | - | 150 kHz | - | - |
| CMRR (Common-Mode Rejection Ratio) | 100 dB | - | - | - |
| Gain Error | - | - | 1% | - |
| Gain Range | 4 V/V | - | 10,000 V/V | - |
| Input Bias Current | - | - | 25 nA | - |
| Input Offset Voltage | - | - | 250 µV | - |
| Input Offset Drift | - | - | 2 µV/°C | - |
| Quiescent Current | - | 460 µA | - | - |
| Noise at 1 kHz | - | 38 nV/√Hz | - | - |
| Operating Temperature Range | -40°C | - | +85°C | - |
| Supply Voltage Range | 2.7 V | - | 36 V | - |
| Dual Supply Voltage Range | ±1.35 V | - | ±18 V | - |
Key Features
- Low Quiescent Current: 460 µA, making it suitable for battery-operated systems.
- Precision Voltage Reference: Externally adjustable with pin-selectable voltages of 2.5V, 5V, or 10V.
- Sleep Mode: Allows shutdown and duty cycle operation to save power.
- Low Offset Voltage: 250 µV max, with low offset drift of 2 µV/°C.
- High Common-Mode Rejection Ratio (CMRR): 100 dB min.
- Low Noise: 38 nV/√Hz at f = 1 kHz.
- Input Protection: To ±40V.
- Wide Supply Range: Single supply from 2.7V to 36V and dual supply from ±1.35V to ±18V.
- Adjustable Gain: A single external resistor sets any gain from 4 to 10,000.
- Package Options: Available in 16-pin plastic DIP and SO-16 surface-mount packages.
Applications
- Pressure and Temperature Bridge Amplifiers: Ideal for precision measurement in industrial and medical applications.
- Industrial Process Control: Used in systems requiring high accuracy and stability.
- Factory Automation: Suitable for various automation tasks where precise signal amplification is necessary.
- Multi-Channel Data Acquisition: Effective in systems that require multiple channels of precise signal amplification.
- Battery Operated Systems: The low quiescent current makes it suitable for battery-powered devices.
- General Purpose Instrumentation: Widely used in various instrumentation applications where high accuracy is required.
- Medical Instruments: Used in ECG and blood pressure monitors due to its high precision and low noise characteristics.
- Audio Equipment: Suitable for phonograph cartridges and instrument amplifiers.
- Measurement Instrumentation: Used in thermocouple amplifiers and transducer interfaces.
Q & A
- What is the typical quiescent current of the INA125PAG4?
The typical quiescent current is 460 µA.
- What is the range of the adjustable gain for the INA125PAG4?
The gain can be adjusted from 4 to 10,000 using a single external resistor.
- What are the available package types for the INA125PAG4?
The INA125PAG4 is available in 16-pin plastic DIP and SO-16 surface-mount packages.
- What is the operating temperature range of the INA125PAG4?
The operating temperature range is from -40°C to +85°C.
- Does the INA125PAG4 have a sleep mode?
- What is the common-mode rejection ratio (CMRR) of the INA125PAG4?
- What is the input offset voltage of the INA125PAG4?
- Can the INA125PAG4 operate on both single and dual supply voltages?
- What are some common applications of the INA125PAG4?
- Is the INA125PAG4 RoHS compliant?
