Overview
The INA128U/2K5 is a precision, low-power instrumentation amplifier manufactured by Texas Instruments. It features a versatile three op amp design and a small size, making it an excellent choice for a wide range of applications. The amplifier offers excellent accuracy and is suitable for various industrial and commercial uses due to its wide supply range and high common-mode rejection ratio (CMR).
Key Specifications
| Parameter | Value |
|---|---|
| Offset Voltage | 50 µV (maximum) |
| Drift | 0.5 µV/°C (maximum) |
| Input Bias Current | 5 nA (maximum) |
| Noise | 8 nV/√Hz, 0.2 µVpp |
| Common-Mode Rejection Ratio (CMR) | 120 dB (minimum) |
| Bandwidth | 1.3 MHz (G = 1) |
| Input Protection | ±40 V |
| Supply Range | ±2.25 V to ±18 V |
| Quiescent Current | 700 µA |
| Packages | 8-pin plastic DIP, SO-8 |
| Operating Temperature Range | –40°C to +85°C |
Key Features
- Low offset voltage and drift for high accuracy
- Low input bias current and noise for precise signal amplification
- High CMR for effective common-mode signal rejection
- Wide bandwidth even at high gain settings (200 kHz at G = 100)
- Inputs protected to ±40 V for robust operation
- Wide supply range from ±2.25 V to ±18 V for flexibility
- Low quiescent current for power efficiency
- Available in 8-pin plastic DIP and SO-8 packages
- A single external resistor sets any gain from 1 to 10,000
Applications
The INA128U/2K5 is suitable for a wide range of applications due to its precision, low power consumption, and versatility. Some common applications include:
- Industrial process control and measurement systems
- Medical devices requiring high accuracy and low noise
- Aerospace and defense systems where precision is critical
- Automotive systems for sensor signal amplification
- Test and measurement equipment
Q & A
- What is the maximum offset voltage of the INA128U/2K5?
The maximum offset voltage is 50 µV.
- What is the input bias current of the INA128U/2K5?
The maximum input bias current is 5 nA.
- What is the bandwidth of the INA128U/2K5 at a gain of 1?
The bandwidth at a gain of 1 is 1.3 MHz.
- How is the gain of the INA128U/2K5 set?
The gain is set using a single external resistor and can range from 1 to 10,000.
- What is the operating temperature range of the INA128U/2K5?
The operating temperature range is –40°C to +85°C.
- What types of packages are available for the INA128U/2K5?
The INA128U/2K5 is available in 8-pin plastic DIP and SO-8 packages.
- What is the common-mode rejection ratio (CMR) of the INA128U/2K5?
The minimum CMR is 120 dB.
- How much quiescent current does the INA128U/2K5 consume?
The quiescent current is 700 µA.
- What is the input protection voltage of the INA128U/2K5?
The inputs are protected to ±40 V.
- What is the supply voltage range for the INA128U/2K5?
The supply voltage range is ±2.25 V to ±18 V.
