Overview
The INA128U/2K5G4 is a low-power, general-purpose instrumentation amplifier produced by Texas Instruments. This device is part of the INA12x series, which includes the INA128 and INA129. The INA128U/2K5G4 is known for its versatile three op amp design and small size, making it an excellent choice for a wide range of applications. It offers excellent accuracy and is suitable for various industrial and commercial uses due to its robust specifications and features.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | 8-pin SOIC (D) |
| Operating Temperature Range (°C) | –40°C to +85°C |
| 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 |
Key Features
- Low offset voltage: 50 µV (maximum)
- Low drift: 0.5 µV/°C (maximum)
- Low input bias current: 5 nA (maximum)
- Low noise: 8 nV/√Hz, 0.2 µVpp
- High CMR: 120 dB (minimum)
- Wide bandwidth: 1.3 MHz (G = 1)
- Inputs protected to ±40 V
- Wide supply range: ±2.25 V to ±18 V
- Low quiescent current: 700 µA
- Available in 8-pin plastic DIP and SO-8 packages
- Single external resistor sets gain from 1 to 10,000
Applications
The INA128U/2K5G4 is suitable for a wide range of applications due to its high accuracy and robust specifications. Some common applications include:
- Industrial automation and control systems
- Medical devices and equipment
- Aerospace and defense systems
- Test and measurement equipment
- Automotive systems requiring high precision amplification
Q & A
- What is the operating temperature range of the INA128U/2K5G4?
The operating temperature range is –40°C to +85°C.
- What is the maximum offset voltage of the INA128U/2K5G4?
The maximum offset voltage is 50 µV.
- How is the gain of the INA128U/2K5G4 set?
The gain is set by a single external resistor and can range from 1 to 10,000.
- What is the common mode rejection ratio (CMR) of the INA128U/2K5G4?
The CMR is 120 dB (minimum).
- What are the available package types for the INA128U/2K5G4?
The device is available in 8-pin plastic DIP and SO-8 packages.
- What is the quiescent current of the INA128U/2K5G4?
The quiescent current is 700 µA.
- Is the INA128U/2K5G4 protected against high input voltages?
Yes, the inputs are protected to ±40 V.
- What is the bandwidth of the INA128U/2K5G4 at a gain of 1?
The bandwidth is 1.3 MHz at a gain of 1.
- Can the INA128U/2K5G4 be used in high-gain applications?
Yes, it provides wide bandwidth even at high gain (200 kHz at G = 100).
- Is the INA128U/2K5G4 still in production?
No, this product is no longer manufactured. You may need to consider substitutes or alternative package types.
