Overview
The INA128UAG4, produced by Texas Instruments, is a low-power, general-purpose instrumentation amplifier that offers excellent accuracy and versatility. It is part of the INA12x series, which includes the INA128 and INA129 models. These amplifiers are designed with a three op-amp configuration and feature current-feedback input circuitry, providing wide bandwidth even at high gain settings. The INA128UAG4 is suitable for a wide range of applications due to its small size, low power consumption, and high performance characteristics.
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Low Offset Voltage | 50 | µV (maximum) |
| Low Drift | 0.5 | µV/°C (maximum) |
| Low Input Bias Current | 5 | nA (maximum) |
| Noise | 8 | nV/√Hz (at G = 1) |
| Common Mode Rejection Ratio (CMRR) | 120 | dB (minimum) |
| Bandwidth | 1.3 | MHz (at G = 1) |
| Input Protection | ±40 | V |
| Supply Voltage Range | ±2.25 V to ±18 V | V |
| Quiescent Current | 700 | µA |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Types | 8-pin plastic DIP, SO-8 |
Key Features
- Low offset voltage and drift for high accuracy.
- Low input bias current and noise for precise signal amplification.
- High common mode rejection ratio (CMRR) for effective noise rejection.
- Wide bandwidth even at high gain settings.
- Inputs protected to ±40 V for robust operation.
- Wide supply range from ±2.25 V to ±18 V.
- Low quiescent current for power efficiency.
- Single external resistor sets gain from 1 to 10,000.
- Available in 8-pin plastic DIP and SO-8 packages.
Applications
- Pressure transmitters.
- Temperature transmitters.
- Weigh scales.
- Electrocardiogram (ECG) systems.
- Analog input modules.
- Data acquisition (DAQ) systems.
Q & A
- What is the maximum offset voltage of the INA128UAG4? The maximum offset voltage is 50 µV.
- What is the input bias current of the INA128UAG4? The maximum input bias current is 5 nA.
- What is the bandwidth of the INA128UAG4 at a gain of 1? The bandwidth is 1.3 MHz at a gain of 1.
- What is the common mode rejection ratio (CMRR) of the INA128UAG4? The CMRR is 120 dB minimum.
- What is the operating temperature range of the INA128UAG4? The operating temperature range is –40°C to +85°C.
- How is the gain of the INA128UAG4 set? The gain is set by a single external resistor and can range from 1 to 10,000.
- What are the package types available for the INA128UAG4? The INA128UAG4 is available in 8-pin plastic DIP and SO-8 packages.
- What are some common applications of the INA128UAG4? Common applications include pressure transmitters, temperature transmitters, weigh scales, ECG systems, analog input modules, and DAQ systems.
- What is the quiescent current of the INA128UAG4? The quiescent current is 700 µA.
- What is the supply voltage range for the INA128UAG4? The supply voltage range is ±2.25 V to ±18 V.
