Overview
The INA128PG4, produced by Texas Instruments, is a precision, low-power instrumentation amplifier. It is part of the INA12x series, which includes the INA128 and INA129 models. These amplifiers are designed for general-purpose use and offer excellent accuracy, making them suitable for a wide range of applications. The versatile three op-amp design and small size of the INA128PG4 make it an excellent choice for various industrial and medical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Offset Voltage | 50 µV | Maximum |
| Offset Voltage Drift | 0.5 µV/°C | Maximum |
| Input Bias Current | 5 nA | Maximum |
| Noise | 8 nV/√Hz, 0.2 µVpp | |
| Common-Mode Rejection Ratio (CMRR) | 120 dB | Minimum |
| Bandwidth | 1.3 MHz (G = 1) | |
| Input Protection | ±40 V | |
| Supply Voltage Range | ±2.25 V to ±18 V | |
| Quiescent Current | 700 µA | |
| Operating Temperature Range | –40°C to +85°C | |
| Packages | 8-pin plastic DIP, SO-8 |
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 CMRR: 120 dB, minimum
- Wide bandwidth even at high gain (200 kHz at G = 100)
- 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
- A single external resistor sets any gain from 1 to 10,000
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 INA128PG4?
The maximum offset voltage is 50 µV.
- What is the input bias current of the INA128PG4?
The input bias current is 5 nA, maximum.
- What is the common-mode rejection ratio (CMRR) of the INA128PG4?
The CMRR is 120 dB, minimum.
- What is the bandwidth of the INA128PG4 at a gain of 1?
The bandwidth is 1.3 MHz at a gain of 1.
- How are the inputs of the INA128PG4 protected?
The inputs are protected to ±40 V.
- What is the supply voltage range for the INA128PG4?
The supply voltage range is ±2.25 V to ±18 V.
- What is the quiescent current of the INA128PG4?
The quiescent current is 700 µA.
- In what packages is the INA128PG4 available?
The INA128PG4 is available in 8-pin plastic DIP and SO-8 packages.
- How can the gain of the INA128PG4 be set?
A single external resistor sets any gain from 1 to 10,000.
- What are some common applications of the INA128PG4?
Common applications include pressure transmitters, temperature transmitters, weigh scales, ECG systems, analog input modules, and data acquisition systems.
